Initial open-source release

7 years ago · e980ab3bda
414 changed files with 26238 additions and 0 deletions
--- a/.gitignore
+++ b/.gitignore
@ -0,0 +1,23 @@
+.vagrant
+Customfile
+
+__pycache__
+*.py[co]
+
+*.egg-info/
+
+.cache/
+.mypy_cache/
+.webassets-cache/
+.webassets-manifest
+
+*.gz
+*.log
+
+# don't track the built versions of CSS and JS
+tildes/static/css/*
+tildes/static/js/third_party.js
+tildes/static/js/tildes.js
+
+# don't track the site-icons spritesheet(s)
+tildes/static/images/site-icons*
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@ -0,0 +1,49 @@
+# Contributing to Tildes development
+
+Outside of actual code changes, there are several other ways to contribute to Tildes development:
+
+* Known issues and plans for upcoming changes are [tracked on GitLab](https://gitlab.com/tildes/tildes/issues). If you've found a bug/problem on the site or have a suggestion, please feel free to submit an issue for it (if one doesn't already exist). If you have a Tildes account, you can also post in [the ~tildes group](https://tildes.net/~tildes) with issues, suggestions, or questions.
+* The [Tildes Docs site](https://docs.tildes.net) is also open-source and accepts contributions. It has a separate repository, also on GitLab: https://gitlab.com/tildes/tildes-static-sites
+* [Donating to Tildes](https://docs.tildes.net/donate) supports its development directly by enabling Deimos to continue working on it full-time. Tildes is a non-profit with no investors and no advertising. Its operation and development relies on donations.
+
+## License
+
+Please take note that Tildes uses [the AGPLv3 license](https://www.gnu.org/licenses/why-affero-gpl.html). This means that if you use the Tildes code to run your own instance of the site, you *must* also open-source the code for your site, including any changes that you've made. If you are not able to open-source the code for your instance, you can not use the Tildes code to run it.
+
+## Setting up a development version
+
+Please see this page on the Tildes Docs for instructions to set up a development version: https://docs.tildes.net/development-setup
+
+## General development information
+
+This page on the Tildes docs contains information about many aspects of Tildes development: https://docs.tildes.net/development
+
+## Contributing code
+
+**Please do not work on significant changes or features without first ensuring that the changes are desired.** If there isn't already an issue related to the change you're intending to make, please [create one first](https://gitlab.com/tildes/tildes/issues/new) to discuss your plans. Similarly, even when there *is* already an issue, if the specifics of how it should work aren't clear, please try to sort that out first (by posting comments on the issue) before doing the work.
+
+In general, anything beyond straightforward fixes and adjustments should have an associated issue. This is for everyone's benefit—it ensures that you don't waste effort working on changes that won't be accepted, and makes it easier for other contributors to see what's already being worked on.
+
+### Choosing what to work on
+
+If you look at [the list of issues](https://gitlab.com/tildes/tildes/issues), there are a few indicators you can use to find a good contribution to work on:
+
+* Make sure the issue isn't already being worked on by someone else. Check the comments on it, and whether it's set as "assigned to" someone. If someone else was working on it but there hasn't been any activity in a while, please post a comment first to check if they're still making progress.
+* Issues with the "high priority" label are ones that are needed soon, and contributions for these will probably be most appreciated. However, they may also be more complex than many other issues, and might not be the best place for a newer contributor to start.
+* Check the "Weight" field on the issue. If set, this is an estimate of how complex it will be to address, ranging from 1 (extremely simple, very small changes) to 9 (major changes, possibly requiring days or even weeks of work).
+
+Once you've selected an issue to work on, please leave a comment saying so. This will allow other people to see that they shouldn't also start on that issue.
+
+### Before submitting a merge request
+
+After you've finished making your changes, there are a few things to check before proposing your changes as a merge request.
+
+First, ensure that all the checks (tests, mypy and code-style) pass successfully. Merge requests that fail any of the checks will not be accepted. For more information, see this section of the development docs: https://docs.tildes.net/development#running-checks-on-your-code
+
+Squash your changes into logical commits. For many changes there should only be a single commit, but some can be broken into multiple logical sections. The commit messages should follow [the formatting described in this article](https://tbaggery.com/2008/04/19/a-note-about-git-commit-messages.html), with the summary line written in the imperative form. The summary line should make sense if you were to use it in a sentence like "If applied, this commit will \_\_\_\_\_\_\_\_". For example, "Add a new X", "Fix a bug with Y", and so on.
+
+### Merge request and code review
+
+Once your code is ready, you can [submit a new merge request on GitLab](https://gitlab.com/tildes/tildes/merge_requests/new).
+
+After creating the merge request, if you need to make any further changes to your code (whether in response to code review or not), please add the changes as new commits. Do not modify the existing commits, this makes it far simpler for other people to follow what changes you're making. Once the merge request is approved, a final pass can be done to squash the commits down, make updates to commit messages, etc. before it's actually merged.
--- a/LICENSE.md
+++ b/LICENSE.md
@ -0,0 +1,660 @@
+### GNU AFFERO GENERAL PUBLIC LICENSE
+
+Version 3, 19 November 2007
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+<https://fsf.org/>
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+in a country, would infringe one or more identifiable patents in that
+country that you have reason to believe are valid.
+
+If, pursuant to or in connection with a single transaction or
+arrangement, you convey, or propagate by procuring conveyance of, a
+covered work, and grant a patent license to some of the parties
+receiving the covered work authorizing them to use, propagate, modify
+or convey a specific copy of the covered work, then the patent license
+you grant is automatically extended to all recipients of the covered
+work and works based on it.
+
+A patent license is "discriminatory" if it does not include within the
+scope of its coverage, prohibits the exercise of, or is conditioned on
+the non-exercise of one or more of the rights that are specifically
+granted under this License. You may not convey a covered work if you
+are a party to an arrangement with a third party that is in the
+business of distributing software, under which you make payment to the
+third party based on the extent of your activity of conveying the
+work, and under which the third party grants, to any of the parties
+who would receive the covered work from you, a discriminatory patent
+license (a) in connection with copies of the covered work conveyed by
+you (or copies made from those copies), or (b) primarily for and in
+connection with specific products or compilations that contain the
+covered work, unless you entered into that arrangement, or that patent
+license was granted, prior to 28 March 2007.
+
+Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+#### 12. No Surrender of Others' Freedom.
+
+If conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License. If you cannot convey a
+covered work so as to satisfy simultaneously your obligations under
+this License and any other pertinent obligations, then as a
+consequence you may not convey it at all. For example, if you agree to
+terms that obligate you to collect a royalty for further conveying
+from those to whom you convey the Program, the only way you could
+satisfy both those terms and this License would be to refrain entirely
+from conveying the Program.
+
+#### 13. Remote Network Interaction; Use with the GNU General Public License.
+
+Notwithstanding any other provision of this License, if you modify the
+Program, your modified version must prominently offer all users
+interacting with it remotely through a computer network (if your
+version supports such interaction) an opportunity to receive the
+Corresponding Source of your version by providing access to the
+Corresponding Source from a network server at no charge, through some
+standard or customary means of facilitating copying of software. This
+Corresponding Source shall include the Corresponding Source for any
+work covered by version 3 of the GNU General Public License that is
+incorporated pursuant to the following paragraph.
+
+Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU General Public License into a single
+combined work, and to convey the resulting work. The terms of this
+License will continue to apply to the part which is the covered work,
+but the work with which it is combined will remain governed by version
+3 of the GNU General Public License.
+
+#### 14. Revised Versions of this License.
+
+The Free Software Foundation may publish revised and/or new versions
+of the GNU Affero General Public License from time to time. Such new
+versions will be similar in spirit to the present version, but may
+differ in detail to address new problems or concerns.
+
+Each version is given a distinguishing version number. If the Program
+specifies that a certain numbered version of the GNU Affero General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation. If the Program does not specify a version number of the
+GNU Affero General Public License, you may choose any version ever
+published by the Free Software Foundation.
+
+If the Program specifies that a proxy can decide which future versions
+of the GNU Affero General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+Later license versions may give you additional or different
+permissions. However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+#### 15. Disclaimer of Warranty.
+
+THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT
+WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND
+PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE
+DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR
+CORRECTION.
+
+#### 16. Limitation of Liability.
+
+IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR
+CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES
+ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT
+NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR
+LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM
+TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER
+PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
+
+#### 17. Interpretation of Sections 15 and 16.
+
+If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+END OF TERMS AND CONDITIONS
+
+### How to Apply These Terms to Your New Programs
+
+If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these
+terms.
+
+To do so, attach the following notices to the program. It is safest to
+attach them to the start of each source file to most effectively state
+the exclusion of warranty; and each file should have at least the
+"copyright" line and a pointer to where the full notice is found.
+
+        <one line to give the program's name and a brief idea of what it does.>
+        Copyright (C) <year>  <name of author>
+
+        This program is free software: you can redistribute it and/or modify
+        it under the terms of the GNU Affero General Public License as
+        published by the Free Software Foundation, either version 3 of the
+        License, or (at your option) any later version.
+
+        This program is distributed in the hope that it will be useful,
+        but WITHOUT ANY WARRANTY; without even the implied warranty of
+        MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+        GNU Affero General Public License for more details.
+
+        You should have received a copy of the GNU Affero General Public License
+        along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper
+mail.
+
+If your software can interact with users remotely through a computer
+network, you should also make sure that it provides a way for users to
+get its source. For example, if your program is a web application, its
+interface could display a "Source" link that leads users to an archive
+of the code. There are many ways you could offer source, and different
+solutions will be better for different programs; see section 13 for
+the specific requirements.
+
+You should also get your employer (if you work as a programmer) or
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary. For more information on this, and how to apply and follow
+the GNU AGPL, see <https://www.gnu.org/licenses/>.
--- a/README.md
+++ b/README.md
@ -0,0 +1,15 @@
+# Tildes
+
+This is the code behind [Tildes](https://tildes.net), a non-profit community site. The official repository is located on GitLab at https://gitlab.com/tildes/tildes
+
+For general information about Tildes and its goals, please see [the announcement blog post](https://blog.tildes.net/announcing-tildes) and [the Tildes Docs site](https://docs.tildes.net).
+
+## Issue tracker / plans
+
+Known issues and plans for upcoming changes are tracked on GitLab: https://gitlab.com/tildes/tildes/issues
+
+The "board" view is useful as an overview: https://gitlab.com/tildes/tildes/boards
+
+## Contributing to Tildes development
+
+Please see [the Contributing doc](CONTRIBUTING.md) for more detailed information about setting up a development version of Tildes and how to contribute to development.
--- a/27
+++ b/27
@ -0,0 +1,27 @@
+# -*- mode: ruby -*-
+# vi: set ft=ruby :
+
+VAGRANT_CONFIG_VERSION = "2"
+
+Vagrant.configure(VAGRANT_CONFIG_VERSION) do |config|
+  config.vm.box = "ubuntu/xenial64"
+
+  # Main application folder
+  config.vm.synced_folder "tildes/", "/opt/tildes/"
+
+  # Mount the salt file root and pillar root
+  config.vm.synced_folder "salt/salt/", "/srv/salt/"
+  config.vm.synced_folder "salt/pillar/", "/srv/pillar/"
+
+  config.vm.network "forwarded_port", guest: 443, host: 4443
+  config.vm.network "forwarded_port", guest: 9090, host: 9090
+
+  # Masterless salt provisioning
+  config.vm.provision :salt do |salt|
+      salt.masterless = true
+      salt.minion_config = "salt/minion"
+      salt.run_highstate = true
+      salt.verbose = true
+      salt.log_level = "info"
+  end
+end
--- a/git_hooks/pre-commit
+++ b/git_hooks/pre-commit
@ -0,0 +1,7 @@
+#!/bin/sh
+#
+# Pre-commit hook script that ensures mypy checks and tests pass
+
+vagrant ssh -c ". activate \
+    && echo 'Checking mypy type annotations...' && mypy . \
+    && echo -n 'Running tests: ' && pytest -q"
--- a/git_hooks/pre-push
+++ b/git_hooks/pre-push
@ -0,0 +1,8 @@
+#!/bin/sh
+#
+# Pre-push hook script that ensures mypy checks, style checks, and tests pass
+
+vagrant ssh -c ". activate \
+    && echo 'Checking mypy type annotations...' && mypy . \
+    && echo -n 'Running tests: ' && pytest -q \
+    && echo 'Checking code style (takes a while)...' && pylama"
--- a/salt/minion
+++ b/salt/minion
@ -0,0 +1,19 @@
+# look for files on the minion, not the master
+file_client: local
+
+# set a specific minion ID for use in top file / pillars
+# options:
+#   - "dev" for the vagrant setup
+#   - "prod" for (single-server) production
+#   - "monitoring" for the monitoring server
+id: dev
+
+# base path for SSL certificates
+ca.cert_base_path: '/etc/pki'
+
+state_verbose: False
+
+# enable new module.run state syntax
+# https://docs.saltstack.com/en/develop/topics/releases/2017.7.0.html#state-module-changes
+use_superseded:
+  - module.run
--- a/salt/pillar/dev.sls
+++ b/salt/pillar/dev.sls
@ -0,0 +1,5 @@
+ini_file: development.ini
+ssl_cert_path: /etc/pki/tls/certs/localhost.crt
+ssl_private_key_path: /etc/pki/tls/certs/localhost.key
+nginx_worker_processes: 1
+postgresql_version: 10
--- a/salt/pillar/monitoring-secrets.example.sls
+++ b/salt/pillar/monitoring-secrets.example.sls
@ -0,0 +1,8 @@
+sentry_secret: 'sentry_secret_token'
+sentry_email: 'sentry_superuser@email.address'
+sentry_password: 'passwordforsentrysuperuser'
+sentry_server_name: 'sentry.example.com'
+developer_ips: ['127.0.0.1']
+prometheus_server_name: 'prom.example.com'
+grafana_server_name: 'grafana.example.com'
+grafana_admin_password: 'passwordforgrafanaadmin'
--- a/salt/pillar/monitoring.sls
+++ b/salt/pillar/monitoring.sls
@ -0,0 +1,5 @@
+ssl_cert_path: /etc/pki/tls/certs/localhost.crt
+ssl_private_key_path: /etc/pki/tls/certs/localhost.key
+hsts_max_age: 60
+nginx_worker_processes: auto
+postgresql_version: 9.6
--- a/salt/pillar/prod.sls
+++ b/salt/pillar/prod.sls
@ -0,0 +1,6 @@
+ini_file: production.ini
+ssl_cert_path: /etc/letsencrypt/live/tildes.net/fullchain.pem
+ssl_private_key_path: /etc/letsencrypt/live/tildes.net/privkey.pem
+hsts_max_age: 63072000
+nginx_worker_processes: auto
+postgresql_version: 10
--- a/salt/pillar/top.sls
+++ b/salt/pillar/top.sls
@ -0,0 +1,8 @@
+base:
+  'dev':
+    - dev
+  'prod':
+    - prod
+  'monitoring':
+    - monitoring
+    - monitoring-secrets
--- a/salt/salt/boussole.service.jinja2
+++ b/salt/salt/boussole.service.jinja2
@ -0,0 +1,13 @@
+{% from 'common.jinja2' import app_dir, bin_dir -%}
+[Unit]
+Description=Boussole - auto-compile SCSS files on change
+
+[Service]
+WorkingDirectory={{ app_dir }}
+Environment="LC_ALL=C.UTF-8" "LANG=C.UTF-8"
+ExecStart={{ bin_dir }}/boussole watch --backend=yaml --config=boussole.yaml --poll
+Restart=always
+RestartSec=5
+
+[Install]
+WantedBy=multi-user.target
--- a/salt/salt/boussole.sls
+++ b/salt/salt/boussole.sls
@ -0,0 +1,32 @@
+{% from 'common.jinja2' import app_dir, bin_dir %}
+
+/etc/systemd/system/boussole.service:
+  file.managed:
+    - source: salt://boussole.service.jinja2
+    - template: jinja
+    - user: root
+    - group: root
+    - mode: 644
+    - require_in:
+      - service: boussole.service
+
+boussole.service:
+  service.running:
+    - enable: True
+    - require:
+      - pip: pip-installs
+
+create-css-directory:
+  file.directory:
+    - name: {{ app_dir }}/static/css
+
+initial-boussole-run:
+  cmd.run:
+    - name: {{ bin_dir }}/boussole compile --backend=yaml --config=boussole.yaml
+    - cwd: {{ app_dir }}
+    - env:
+      - LC_ALL: C.UTF-8
+      - LANG: C.UTF-8
+    - require:
+      - file: create-css-directory
+    - unless: ls {{ app_dir }}/static/css/*.css
--- a/salt/salt/cmark-gfm.sls
+++ b/salt/salt/cmark-gfm.sls
@ -0,0 +1,25 @@
+unpack-cmark-gfm:
+  archive.extracted:
+    - name: /tmp/cmark-gfm
+    - source:
+      - salt://cmark-gfm.tar.gz
+      - https://github.com/github/cmark/archive/0.28.0.gfm.11.tar.gz
+    - source_hash: sha256=a95ee221c3f6d718bbb38bede95f05f05e07827f8f3c29ed6cb09ddb7d05c2cd
+    - if_missing: /usr/local/lib/libcmark-gfm.so
+    - options: --strip-components=1
+    - enforce_toplevel: False
+
+install-cmark-build-deps:
+  pkg.installed:
+    - name: cmake
+
+install-cmark-gfm:
+  cmd.run:
+    - cwd: /tmp/cmark-gfm/
+    - names:
+      - make
+      - make install
+    - onchanges:
+      - archive: unpack-cmark-gfm
+    - require:
+      - pkg: install-cmark-build-deps
--- a/salt/salt/common.jinja2
+++ b/salt/salt/common.jinja2
@ -0,0 +1,13 @@
+{% set python_version = '3.6.5' %}
+
+{% set app_dir = '/opt/tildes' %}
+{% set static_sites_dir = '/opt/tildes-static-sites' %}
+
+{% set venv_dir = '/opt/venvs/tildes' %}
+{% set bin_dir = venv_dir + '/bin' %}
+
+{% if grains['id'] == 'dev' %}
+  {% set app_username = 'vagrant' %}
+{% else %}
+  {% set app_username = 'tildes' %}
+{% endif %}
--- a/salt/salt/consumers/init.sls
+++ b/salt/salt/consumers/init.sls
@ -0,0 +1,11 @@
+/etc/systemd/system/consumer-topic_metadata_generator.service:
+  file.managed:
+    - source: salt://consumers/topic_metadata_generator.service.jinja2
+    - template: jinja
+    - user: root
+    - group: root
+    - mode: 644
+
+consumer-topic_metadata_generator.service:
+  service.running:
+    - enable: True
--- a/salt/salt/consumers/topic_metadata_generator.service.jinja2
+++ b/salt/salt/consumers/topic_metadata_generator.service.jinja2
@ -0,0 +1,16 @@
+{% from 'common.jinja2' import app_dir, bin_dir -%}
+[Unit]
+Description=Topic Metadata Generator (Queue Consumer)
+Requires=rabbitmq-server.service
+After=rabbitmq-server.service
+PartOf=rabbitmq-server.service
+
+[Service]
+WorkingDirectory={{ app_dir }}/consumers
+Environment="INI_FILE={{ app_dir }}/{{ pillar['ini_file'] }}"
+ExecStart={{ bin_dir }}/python topic_metadata_generator.py
+Restart=always
+RestartSec=5
+
+[Install]
+WantedBy=multi-user.target
--- a/salt/salt/cronjobs.sls
+++ b/salt/salt/cronjobs.sls
@ -0,0 +1,7 @@
+{% from 'common.jinja2' import app_dir, bin_dir %}
+
+data-cleanup-cronjob:
+  cron.present:
+    - name: {{ bin_dir }}/python -c "from scripts.clean_private_data import clean_all_data; clean_all_data('{{ app_dir }}/{{ pillar['ini_file'] }}')"
+    - hour: 4
+    - minute: 10
--- a/salt/salt/development.sls
+++ b/salt/salt/development.sls
@ -0,0 +1,21 @@
+{% from 'common.jinja2' import app_username, bin_dir %}
+
+{% set profile_dir = '/home/' + app_username + '/.ipython/profile_default' %}
+
+ipython-profile:
+  cmd.run:
+    - name: {{ bin_dir }}/ipython profile create
+    - runas: {{ app_username }}
+    - creates: {{ profile_dir }}
+  file.managed:
+    - name: {{ profile_dir }}/ipython_config.py
+    - contents:
+      - c.InteractiveShellApp.extensions = ['autoreload']
+      - c.InteractiveShellApp.exec_lines = ['%autoreload 2']
+  require:
+    - pip: pip-installs
+
+automatic-activate:
+  file.append:
+    - name: '/home/{{ app_username }}/.bashrc'
+    - text: 'source activate'
--- a/salt/salt/final-setup.sls
+++ b/salt/salt/final-setup.sls
@ -0,0 +1,17 @@
+{% from 'common.jinja2' import app_dir, bin_dir %}
+
+initialize-db:
+  cmd.run:
+    - name: {{ bin_dir }}/python -c "from scripts.initialize_db import initialize_db; initialize_db('{{ app_dir }}/{{ pillar['ini_file'] }}')"
+    - cwd: {{ app_dir }}
+    - onchanges:
+      - postgres_database: tildes
+
+{% if grains['id'] == 'dev' %}
+insert-dev-data:
+  cmd.run:
+    - name: {{ bin_dir }}/python -c "from scripts.initialize_db import insert_dev_data; insert_dev_data('{{ app_dir }}/{{ pillar['ini_file'] }}')"
+    - cwd: {{ app_dir }}
+    - onchanges:
+      - cmd: initialize-db
+{% endif %}
--- a/salt/salt/grafana/grafana.conf.jinja2
+++ b/salt/salt/grafana/grafana.conf.jinja2
@ -0,0 +1,19 @@
+server {
+    listen 443 ssl http2;
+    listen [::]:443 ssl http2;
+
+    {% for ip in pillar['developer_ips'] %}
+    allow {{ ip }};
+    {% endfor %}
+    deny all;
+
+    add_header Strict-Transport-Security "max-age={{ pillar['hsts_max_age'] }}; includeSubDomains; preload" always;
+
+    server_name {{ pillar['grafana_server_name'] }};
+
+    location / {
+        proxy_set_header Host $host;
+        proxy_redirect off;
+        proxy_pass http://localhost:3000;
+    }
+}
--- a/salt/salt/grafana/grafana.ini.jinja2
+++ b/salt/salt/grafana/grafana.ini.jinja2
@ -0,0 +1,17 @@
+[server]
+domain = {{ pillar['grafana_server_name'] }}
+root_url = https://{{ pillar['grafana_server_name'] }}
+
+[analytics]
+reporting_enabled = false
+
+[security]
+admin_password = """{{ pillar['grafana_admin_password'] }}"""
+disable_gravatar = true
+
+[snapshots]
+external_enabled = false
+
+[users]
+allow_sign_up = false
+allow_org_create = false
--- a/salt/salt/grafana/init.sls
+++ b/salt/salt/grafana/init.sls
@ -0,0 +1,61 @@
+grafana:
+  pkgrepo.managed:
+    - name: deb https://packagecloud.io/grafana/stable/debian/ jessie main
+    - dist: jessie
+    - file: /etc/apt/sources.list.d/grafana.list
+    - key_url: https://packagecloud.io/gpg.key
+    - require_in:
+      - pkg: grafana
+  pkg.installed:
+    - name: grafana
+    - refresh: True
+  # note: this file must be set up before the server is started for the first
+  # time, otherwise the admin password will not be set correctly
+  file.managed:
+    - name: /etc/grafana/grafana.ini
+    - source: salt://grafana/grafana.ini.jinja2
+    - template: jinja
+    - user: root
+    - group: grafana
+    - mode: 640
+  service.running:
+    - name: grafana-server
+    - enable: True
+    - require:
+      - pkg: grafana
+      - file: /etc/grafana/grafana.ini
+    - watch:
+      - file: /etc/grafana/grafana.ini
+  http.query:
+    - name: http://localhost:3000/api/datasources
+    - method: POST
+    - username: admin
+    - password: {{ pillar['grafana_admin_password'] }}
+    - data: |
+        {"name": "Prometheus",
+        "type": "prometheus",
+        "url": "http://localhost:9090",
+        "access": "proxy",
+        "isDefault": true}
+    - header_list:
+      - 'Content-Type: application/json'
+    - status: 200
+    - unless:
+      - curl -f http://admin:{{ pillar['grafana_admin_password'] }}@localhost:3000/api/datasources/name/Prometheus
+
+/etc/nginx/sites-available/grafana.conf:
+  file.managed:
+    - source: salt://grafana/grafana.conf.jinja2
+    - template: jinja
+    - user: root
+    - group: root
+    - mode: 644
+    - makedirs: True
+
+/etc/nginx/sites-enabled/grafana.conf:
+  file.symlink:
+    - target: /etc/nginx/sites-available/grafana.conf
+    - makedirs: True
+    - user: root
+    - group: root
+    - mode: 644
--- a/salt/salt/gunicorn/gunicorn.conf
+++ b/salt/salt/gunicorn/gunicorn.conf
@ -0,0 +1 @@
+d /run/gunicorn 0755 gunicorn gunicorn -
--- a/salt/salt/gunicorn/gunicorn.service.jinja2
+++ b/salt/salt/gunicorn/gunicorn.service.jinja2
@ -0,0 +1,22 @@
+{% from 'common.jinja2' import app_dir, bin_dir -%}
+[Unit]
+Description=gunicorn daemon
+Requires=gunicorn.socket
+After=network.target
+
+[Service]
+PIDFile=/run/gunicorn/pid
+User=gunicorn
+Group=gunicorn
+RuntimeDirectory=gunicorn
+WorkingDirectory={{ app_dir }}
+ExecStart={{ bin_dir }}/gunicorn --paste {{ pillar['ini_file'] }} --config {{ app_dir }}/gunicorn_config.py
+ExecReload=/bin/kill -s HUP $MAINPID
+ExecStop=/bin/kill -s TERM $MAINPID
+PrivateTmp=true
+Environment=prometheus_multiproc_dir=/tmp
+Restart=always
+RestartSec=30
+
+[Install]
+WantedBy=multi-user.target
--- a/salt/salt/gunicorn/gunicorn.socket
+++ b/salt/salt/gunicorn/gunicorn.socket
@ -0,0 +1,11 @@
+[Unit]
+Description=gunicorn socket
+PartOf=gunicorn.service
+
+[Socket]
+ListenStream=/run/gunicorn/socket
+SocketUser=gunicorn
+SocketGroup=gunicorn
+
+[Install]
+WantedBy=sockets.target
--- a/salt/salt/gunicorn/init.sls
+++ b/salt/salt/gunicorn/init.sls
@ -0,0 +1,41 @@
+gunicorn:
+  group.present:
+    - name: gunicorn
+  user.present:
+    - name: gunicorn
+    - groups: [gunicorn]
+    - createhome: False
+
+/etc/systemd/system/gunicorn.service:
+  file.managed:
+    - source: salt://gunicorn/gunicorn.service.jinja2
+    - template: jinja
+    - user: root
+    - group: root
+    - mode: 644
+    - require_in:
+      - service: gunicorn.socket
+
+/etc/systemd/system/gunicorn.socket:
+  file.managed:
+    - source: salt://gunicorn/gunicorn.socket
+    - user: root
+    - group: root
+    - mode: 644
+    - require_in:
+      - service: gunicorn.socket
+
+/usr/lib/tmpfiles.d/gunicorn.conf:
+  file.managed:
+    - source: salt://gunicorn/gunicorn.conf
+    - user: root
+    - group: root
+    - mode: 644
+    - require_in:
+      - service: gunicorn.socket
+
+gunicorn.socket:
+  service.running:
+    - enable: True
+    - require:
+      - user: gunicorn
--- a/salt/salt/nginx/init.sls
+++ b/salt/salt/nginx/init.sls
@ -0,0 +1,25 @@
+nginx:
+  pkgrepo.managed:
+    - name: deb http://nginx.org/packages/ubuntu/ xenial nginx
+    - dist: xenial
+    - file: /etc/apt/sources.list.d/nginx.list
+    - key_url: https://nginx.org/keys/nginx_signing.key
+    - require_in:
+      - pkg: nginx
+  pkg.installed:
+    - name: nginx
+    - refresh: True
+  service.running:
+    - require:
+      - pkg: nginx
+    - reload: True
+    - watch:
+      - file: /etc/nginx/*
+
+/etc/nginx/nginx.conf:
+  file.managed:
+    - source: salt://nginx/nginx.conf.jinja2
+    - template: jinja
+    - user: root
+    - group: root
+    - mode: 644
--- a/salt/salt/nginx/nginx.conf.jinja2
+++ b/salt/salt/nginx/nginx.conf.jinja2
@ -0,0 +1,89 @@
+user nginx;
+worker_processes {{ pillar['nginx_worker_processes'] }};
+
+error_log /var/log/nginx/error.log warn;
+pid /var/run/nginx.pid;
+
+
+events {
+    worker_connections 1024;
+}
+
+
+http {
+    include /etc/nginx/mime.types;
+    default_type application/octet-stream;
+
+    server_tokens off;
+
+    log_format main '$remote_addr - $remote_user [$time_local] "$request" '
+                    '$status $body_bytes_sent "$http_referer" '
+                    '"$http_user_agent" "$http_x_forwarded_for"';
+
+    access_log /var/log/nginx/access.log main;
+
+    {% if grains['id'] == 'dev' %}
+    # have to disable sendfile for vagrant due to a virtualbox bug
+    sendfile off;
+    {% else %}
+    sendfile on;
+    {% endif %}
+
+    keepalive_timeout  65;
+
+    # redirect non-https accesses to the https version
+    server {
+        listen 80 default_server;
+        listen [::]:80 default_server;
+        server_name _;
+
+        return 301 https://$host$request_uri;
+    }
+
+    gzip on;
+    gzip_min_length 1000;
+    gzip_comp_level 6;
+    gzip_vary on;
+    gzip_proxied any;
+
+    # type list from https://github.com/h5bp/server-configs-nginx
+    gzip_types
+      application/atom+xml
+      application/javascript
+      application/json
+      application/ld+json
+      application/manifest+json
+      application/rss+xml
+      application/vnd.geo+json
+      application/vnd.ms-fontobject
+      application/x-font-ttf
+      application/x-web-app-manifest+json
+      application/xhtml+xml
+      application/xml
+      font/opentype
+      image/bmp
+      image/svg+xml
+      image/x-icon
+      text/cache-manifest
+      text/css
+      text/plain
+      text/vcard
+      text/vnd.rim.location.xloc
+      text/vtt
+      text/x-component
+      text/x-cross-domain-policy;
+
+    ssl_certificate {{ pillar['ssl_cert_path'] }};
+    ssl_certificate_key {{ pillar['ssl_private_key_path'] }};
+    ssl_session_timeout 1d;
+    ssl_session_cache shared:SSL:50m;
+    ssl_session_tickets off;
+
+    # "modern" configuration from Mozilla guidelines
+    ssl_protocols TLSv1.2;
+    ssl_ciphers 'ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256';
+    ssl_prefer_server_ciphers on;
+
+    include /etc/nginx/sites-enabled/*.conf;
+}
+
--- a/salt/salt/nginx/site-config.sls
+++ b/salt/salt/nginx/site-config.sls
@ -0,0 +1,16 @@
+/etc/nginx/sites-available/tildes.conf:
+  file.managed:
+    - source: salt://nginx/tildes.conf.jinja2
+    - template: jinja
+    - user: root
+    - group: root
+    - mode: 644
+    - makedirs: True
+
+/etc/nginx/sites-enabled/tildes.conf:
+  file.symlink:
+    - target: /etc/nginx/sites-available/tildes.conf
+    - makedirs: True
+    - user: root
+    - group: root
+    - mode: 644
--- a/salt/salt/nginx/static-sites-config.sls
+++ b/salt/salt/nginx/static-sites-config.sls
@ -0,0 +1,16 @@
+/etc/nginx/sites-available/tildes-static-sites.conf:
+  file.managed:
+    - source: salt://nginx/tildes-static-sites.conf.jinja2
+    - template: jinja
+    - user: root
+    - group: root
+    - mode: 644
+    - makedirs: True
+
+/etc/nginx/sites-enabled/tildes-static-sites.conf:
+  file.symlink:
+    - target: /etc/nginx/sites-available/tildes-static-sites.conf
+    - makedirs: True
+    - user: root
+    - group: root
+    - mode: 644
--- a/salt/salt/nginx/tildes-static-sites.conf.jinja2
+++ b/salt/salt/nginx/tildes-static-sites.conf.jinja2
@ -0,0 +1,35 @@
+{% from 'common.jinja2' import static_sites_dir -%}
+
+{% for subdomain in ('blog', 'docs') %}
+server {
+    listen 443 ssl http2;
+    listen [::]:443 ssl http2;
+
+    add_header Strict-Transport-Security "max-age={{ pillar['hsts_max_age'] }}; includeSubDomains; preload" always;
+
+    add_header X-Content-Type-Options "nosniff" always;
+    add_header X-Frame-Options "SAMEORIGIN" always;
+    add_header X-Xss-Protection "1; mode=block" always;
+    add_header Referrer-Policy "same-origin" always;
+
+    server_name {{ subdomain }}.tildes.net;
+
+    keepalive_timeout 5;
+    gzip_static on;
+
+    location /favicon.ico {
+        root /opt/tildes-static-sites/theme/images;
+        try_files $uri =404;
+    }
+
+    location /theme {
+        root {{ static_sites_dir }};
+        try_files $uri =404;
+    }
+
+    location / {
+        root {{ static_sites_dir }}/{{ subdomain }};
+        try_files $uri $uri.html $uri/index.html =404;
+    }
+}
+{% endfor %}
--- a/salt/salt/nginx/tildes.conf.jinja2
+++ b/salt/salt/nginx/tildes.conf.jinja2
@ -0,0 +1,97 @@
+{% from 'common.jinja2' import app_dir -%}
+upstream app_server {
+    server unix:/run/gunicorn/socket fail_timeout=0;
+}
+
+# define map to set Expires+Cache-Control headers for files based on type
+map $sent_http_content_type $expires_type_map {
+    default off;
+    text/css max;
+    application/javascript max;
+    image/x-icon 1d;
+    ~image/ max;
+}
+
+# redirect www. to base domain
+server {
+    listen 80;
+    listen 443 ssl http2;
+    listen [::]:443 ssl http2;
+
+    server_name www.tildes.net;
+    return 301 https://tildes.net$request_uri;
+}
+
+server {
+    # remove trailing slash from addresses, the $port thing is a hack for
+    # development in Vagrant, so the port forwarding from the host is kept
+    set $port '';
+    if ($http_host ~ :(\d+)$) {
+        set $port :$1;
+    }
+    rewrite ^/(.*)/$ https://$host$port/$1 permanent;
+
+    # redirect /u/username to /user/username
+    rewrite ^/u/(.*)$ https://$host$port/user/$1;
+
+    listen 443 ssl http2;
+    listen [::]:443 ssl http2;
+
+    {% if grains['id'] != 'dev' %}
+      add_header Strict-Transport-Security "max-age={{ pillar['hsts_max_age'] }}; includeSubDomains; preload" always;
+    {% endif %}
+
+    # Content Security Policy:
+    #   - "img-src data:" is needed for Spectre.css icons
+    set $csp_value "default-src 'none'; script-src 'self'; style-src 'self'; img-src 'self' data:; connect-src 'self'; manifest-src 'self'; form-action 'self'; frame-ancestors 'none'; base-uri 'none'";
+
+    {% if grains['id'] == 'dev' %}
+      add_header Content-Security-Policy-Report-Only $csp_value always;
+    {% else %}
+      add_header Content-Security-Policy $csp_value always;
+    {% endif %}
+
+    add_header X-Content-Type-Options "nosniff" always;
+    add_header X-Frame-Options "DENY" always;
+    add_header X-Xss-Protection "1; mode=block" always;
+    add_header Referrer-Policy "same-origin" always;
+
+    server_name tildes.net localhost;
+
+    keepalive_timeout 5;
+
+    root {{ app_dir }}/static;
+
+    # Block access to /metrics except from localhost (for Prometheus)
+    location /metrics {
+        allow 127.0.0.1;
+        deny all;
+
+        # try_files is unnecessary here, but I don't know the "proper" way
+        try_files $uri @proxy_to_app;
+    }
+
+    # add Expires+Cache-Control headers from the mime-type map defined above
+    expires $expires_type_map;
+
+    location / {
+        # checks for static file, if not found proxy to app
+        try_files $uri @proxy_to_app;
+        gzip_static on;
+    }
+
+    location @proxy_to_app {
+        # Cornice adds the X-Content-Type-Options header, so it will end up
+        # being duplicated since nginx is also configured to send it (above).
+        # It's better to drop the header coming from Gunicorn here than to
+        # stop sending it in nginx, since if I ever stop using Cornice I would
+        # lose that header (and probably not realize).
+        proxy_hide_header X-Content-Type-Options;
+
+        proxy_set_header Host $host;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+        proxy_redirect off;
+        proxy_pass http://app_server;
+    }
+}
--- a/salt/salt/postgresql/init.sls
+++ b/salt/salt/postgresql/init.sls
@ -0,0 +1,56 @@
+postgresql:
+  pkgrepo.managed:
+    - name: deb http://apt.postgresql.org/pub/repos/apt/ xenial-pgdg main
+    - dist: xenial-pgdg
+    - file: /etc/apt/sources.list.d/psql.list
+    - key_url: https://www.postgresql.org/media/keys/ACCC4CF8.asc
+    - require_in:
+      - pkg: postgresql
+  pkg.installed:
+    - name: postgresql-{{ pillar['postgresql_version'] }}
+    - refresh: True
+  service.running:
+    - require:
+      - pkg: postgresql
+    - reload: True
+    - watch:
+      - file: /etc/postgresql/{{ pillar['postgresql_version'] }}/main/*.conf
+
+set-lock-timeout:
+  file.replace:
+    - name: /etc/postgresql/{{ pillar['postgresql_version'] }}/main/postgresql.conf
+    - pattern: '^#?lock_timeout = (?!5000).*$'
+    - repl: 'lock_timeout = 5000'
+
+set-statement-timeout:
+  file.replace:
+    - name: /etc/postgresql/{{ pillar['postgresql_version'] }}/main/postgresql.conf
+    - pattern: '^#?statement_timeout = (?!5000).*$'
+    - repl: 'statement_timeout = 5000'
+
+set-idle-in-transaction-timeout:
+  file.replace:
+    - name: /etc/postgresql/{{ pillar['postgresql_version'] }}/main/postgresql.conf
+    - pattern: '^#?idle_in_transaction_session_timeout = (?!600000).*$'
+    - repl: 'idle_in_transaction_session_timeout = 600000'
+
+enable-pg-stat-statements:
+  file.replace:
+    - name: /etc/postgresql/{{ pillar['postgresql_version'] }}/main/postgresql.conf
+    - pattern: '^#?shared_preload_libraries = .*$'
+    - repl: "shared_preload_libraries = 'pg_stat_statements'"
+    - watch_in:
+      - module: enable-pg-stat-statements
+  module.wait:
+    - service.restart:
+      - name: postgresql.service
+
+/etc/postgresql/{{ pillar['postgresql_version'] }}/main/pg_hba.conf:
+  file.managed:
+    - source: salt://postgresql/pg_hba.conf.jinja2
+    - template: jinja
+    - user: postgres
+    - group: postgres
+    - mode: 640
+  require:
+    - service: postgresql
--- a/salt/salt/postgresql/pg_hba.conf.jinja2
+++ b/salt/salt/postgresql/pg_hba.conf.jinja2
@ -0,0 +1,6 @@
+{% for line in accumulator['pg_hba_lines'] -%}
+{{ line }}
+{% endfor %}
+
+# Required: allow the database superuser to connect via socket
+local   all             postgres    peer
--- a/salt/salt/postgresql/pgbouncer.ini.jinja2
+++ b/salt/salt/postgresql/pgbouncer.ini.jinja2
@ -0,0 +1,21 @@
+[databases]
+{% for line in accumulator['pgbouncer_db_lines'] -%}
+{{ line }}
+{% endfor %}
+
+[pgbouncer]
+logfile = /var/log/postgresql/pgbouncer.log
+log_connections = 0
+log_disconnections = 0
+
+pidfile = /var/run/postgresql/pgbouncer.pid
+
+listen_port = 6432
+
+unix_socket_dir = /var/run/postgresql
+
+auth_type = hba
+auth_file = /etc/pgbouncer/userlist.txt
+auth_hba_file = /etc/postgresql/{{ pillar['postgresql_version'] }}/main/pg_hba.conf
+
+pool_mode = transaction
--- a/salt/salt/postgresql/pgbouncer.sls
+++ b/salt/salt/postgresql/pgbouncer.sls
@ -0,0 +1,25 @@
+install-pgbouncer:
+  pkg.installed:
+    - name: pgbouncer
+
+/etc/pgbouncer/pgbouncer.ini:
+  file.managed:
+    - source: salt://postgresql/pgbouncer.ini.jinja2
+    - template: jinja
+    - user: postgres
+    - group: postgres
+    - mode: 640
+
+/etc/pgbouncer/userlist.txt:
+  file.managed:
+    - contents: '"tildes" ""'
+    - user: postgres
+    - group: postgres
+    - mode: 640
+
+pgbouncer.service:
+  service.running:
+    - enable: True
+    - reload: True
+    - watch:
+      - file: /etc/pgbouncer/pgbouncer.ini
--- a/salt/salt/postgresql/site-db.sls
+++ b/salt/salt/postgresql/site-db.sls
@ -0,0 +1,57 @@
+site-db-user:
+  postgres_user.present:
+    - name: tildes
+    - require:
+      - service: postgresql
+
+site-db-database:
+  postgres_database.present:
+    - name: tildes
+    - owner: tildes
+    - require:
+      - postgres_user: tildes
+
+site-db-enable-citext:
+  postgres_extension.present:
+    - name: citext
+    - maintenance_db: tildes
+    - require:
+      - postgres_database: tildes
+
+site-db-enable-ltree:
+  postgres_extension.present:
+    - name: ltree
+    - maintenance_db: tildes
+    - require:
+      - postgres_database: tildes
+
+site-db-enable-intarray:
+  postgres_extension.present:
+    - name: intarray
+    - maintenance_db: tildes
+    - require:
+      - postgres_database: tildes
+
+site-db-enable-pg_stat_statements:
+  postgres_extension.present:
+    - name: pg_stat_statements
+    - maintenance_db: tildes
+    - require:
+      - postgres_database: tildes
+
+site-db-pg_hba-lines:
+  file.accumulated:
+    - name: pg_hba_lines
+    - filename: /etc/postgresql/{{ pillar['postgresql_version'] }}/main/pg_hba.conf
+    - text:
+      - 'local   sameuser        tildes   trust'
+    - require_in:
+      - file: /etc/postgresql/{{ pillar['postgresql_version'] }}/main/pg_hba.conf
+
+site-db-pgbouncer-lines:
+  file.accumulated:
+    - name: pgbouncer_db_lines
+    - filename: /etc/pgbouncer/pgbouncer.ini
+    - text: 'tildes ='
+    - require_in:
+      - file: /etc/pgbouncer/pgbouncer.ini
--- a/salt/salt/postgresql/test-db.sls
+++ b/salt/salt/postgresql/test-db.sls
@ -0,0 +1,44 @@
+test-db-database:
+  postgres_database.present:
+    - name: tildes_test
+    - owner: tildes
+    - require:
+      - postgres_user: tildes
+
+test-db-enable-citext:
+  postgres_extension.present:
+    - name: citext
+    - maintenance_db: tildes_test
+    - require:
+      - postgres_database: tildes_test
+
+test-db-enable-ltree:
+  postgres_extension.present:
+    - name: ltree
+    - maintenance_db: tildes_test
+    - require:
+      - postgres_database: tildes_test
+
+test-db-enable-intarray:
+  postgres_extension.present:
+    - name: intarray
+    - maintenance_db: tildes_test
+    - require:
+      - postgres_database: tildes_test
+
+test-db-pg_hba-lines:
+  file.accumulated:
+    - name: pg_hba_lines
+    - filename: /etc/postgresql/{{ pillar['postgresql_version'] }}/main/pg_hba.conf
+    - text:
+      - 'local   tildes_test   tildes   trust'
+    - require_in:
+      - file: /etc/postgresql/{{ pillar['postgresql_version'] }}/main/pg_hba.conf
+
+test-db-pgbouncer-lines:
+  file.accumulated:
+    - name: pgbouncer_db_lines
+    - filename: /etc/pgbouncer/pgbouncer.ini
+    - text: 'tildes_test ='
+    - require_in:
+      - file: /etc/pgbouncer/pgbouncer.ini
--- a/salt/salt/prometheus/exporters/node_exporter.sls
+++ b/salt/salt/prometheus/exporters/node_exporter.sls
@ -0,0 +1,28 @@
+# Download/extract and set up the node exporter (hardware/OS metrics)
+include:
+  - prometheus.user
+
+unpack-node-exporter:
+  archive.extracted:
+    - name: /opt/prometheus_node_exporter
+    - source:
+      - salt://prometheus/exporters/node_exporter-0.13.0.linux-amd64.tar.gz
+      - https://github.com/prometheus/node_exporter/releases/download/v0.13.0/node_exporter-0.13.0.linux-amd64.tar.gz
+    - source_hash: sha256=2de5d1e51330c41588ed4c88bc531a3d2dccf6b4d7b99d5782d95cff27a3c049
+    - if_missing: /opt/prometheus_node_exporter
+    - user: prometheus
+    - group: prometheus
+    - options: --strip-components=1
+    - enforce_toplevel: False
+
+/etc/systemd/system/prometheus_node_exporter.service:
+  file.managed:
+    - source: salt://prometheus/exporters/prometheus_node_exporter.service
+    - user: root
+    - group: root
+    - mode: 644
+
+prometheus-node-exporter-service:
+  service.running:
+    - name: prometheus_node_exporter
+    - enable: True
--- a/salt/salt/prometheus/exporters/postgres_exporter.sls
+++ b/salt/salt/prometheus/exporters/postgres_exporter.sls
@ -0,0 +1,28 @@
+# Download and set up the postgres exporter
+include:
+  - prometheus.user
+
+postgres-exporter:
+  file.managed:
+    - name: /opt/prometheus_postgres_exporter/postgres_exporter
+    - source:
+      - salt://prometheus/exporters/postgres_exporter
+      - https://github.com/wrouesnel/postgres_exporter/releases/download/v0.3.0/postgres_exporter
+    - source_hash: sha256=44654860e3122acf183e8cad504bddc3bf9dd717910cddc99b589a3463d2ec6f
+    - user: postgres
+    - group: postgres
+    - mode: 774
+    - makedirs: True
+    - unless: ls /opt/prometheus_postgres_exporter/postgres_exporter
+
+/etc/systemd/system/prometheus_postgres_exporter.service:
+  file.managed:
+    - source: salt://prometheus/exporters/prometheus_postgres_exporter.service
+    - user: root
+    - group: root
+    - mode: 644
+
+prometheus-postgres-exporter-service:
+  service.running:
+    - name: prometheus_postgres_exporter
+    - enable: True
--- a/salt/salt/prometheus/exporters/prometheus_node_exporter.service
+++ b/salt/salt/prometheus/exporters/prometheus_node_exporter.service
@ -0,0 +1,14 @@
+[Unit]
+Description=Prometheus Node Exporter
+After=syslog.target network.target
+
+[Service]
+Type=simple
+RemainAfterExit=no
+WorkingDirectory=/opt/prometheus_node_exporter
+User=prometheus
+Group=prometheus
+ExecStart=/opt/prometheus_node_exporter/node_exporter -log.level info
+
+[Install]
+WantedBy=multi-user.target
--- a/salt/salt/prometheus/exporters/prometheus_postgres_exporter.service
+++ b/salt/salt/prometheus/exporters/prometheus_postgres_exporter.service
@ -0,0 +1,15 @@
+[Unit]
+Description=Prometheus Postgres Exporter
+After=syslog.target network.target
+
+[Service]
+Type=simple
+RemainAfterExit=no
+WorkingDirectory=/opt/prometheus_postgres_exporter
+User=postgres
+Group=postgres
+Environment="DATA_SOURCE_NAME=user=postgres host=/run/postgresql/ sslmode=disable"
+ExecStart=/opt/prometheus_postgres_exporter/postgres_exporter
+
+[Install]
+WantedBy=multi-user.target
--- a/salt/salt/prometheus/exporters/prometheus_redis_exporter.service
+++ b/salt/salt/prometheus/exporters/prometheus_redis_exporter.service
@ -0,0 +1,14 @@
+[Unit]
+Description=Prometheus Redis Exporter
+After=syslog.target network.target
+
+[Service]
+Type=simple
+RemainAfterExit=no
+WorkingDirectory=/opt/prometheus_redis_exporter
+User=prometheus
+Group=prometheus
+ExecStart=/opt/prometheus_redis_exporter/redis_exporter
+
+[Install]
+WantedBy=multi-user.target
--- a/salt/salt/prometheus/exporters/redis_exporter.sls
+++ b/salt/salt/prometheus/exporters/redis_exporter.sls
@ -0,0 +1,27 @@
+# Download/extract and set up the redis exporter
+include:
+  - prometheus.user
+
+unpack-redis-exporter:
+  archive.extracted:
+    - name: /opt/prometheus_redis_exporter
+    - source:
+      - salt://prometheus/exporters/redis_exporter-v0.10.7.linux-amd64.tar.gz
+      - https://github.com/oliver006/redis_exporter/releases/download/v0.10.7/redis_exporter-v0.10.7.linux-amd64.tar.gz
+    - source_hash: sha256=b9b48f321a201f3b424f1710d2cac1bca03272d67001812d8b2fb6305099fb09
+    - if_missing: /opt/prometheus_redis_exporter
+    - user: prometheus
+    - group: prometheus
+    - enforce_toplevel: False
+
+/etc/systemd/system/prometheus_redis_exporter.service:
+  file.managed:
+    - source: salt://prometheus/exporters/prometheus_redis_exporter.service
+    - user: root
+    - group: root
+    - mode: 644
+
+prometheus-redis-exporter-service:
+  service.running:
+    - name: prometheus_redis_exporter
+    - enable: True
--- a/salt/salt/prometheus/init.sls
+++ b/salt/salt/prometheus/init.sls
@ -0,0 +1,57 @@
+include:
+  - prometheus.user
+
+unpack-prometheus:
+  archive.extracted:
+    - name: /opt/prometheus
+    - source:
+      - salt://prometheus/prometheus-2.0.0.linux-amd64.tar.gz
+      - https://github.com/prometheus/prometheus/releases/download/v2.0.0/prometheus-2.0.0.linux-amd64.tar.gz
+    - source_hash: sha256=e12917b25b32980daee0e9cf879d9ec197e2893924bd1574604eb0f550034d46
+    - if_missing: /opt/prometheus
+    - user: prometheus
+    - group: prometheus
+    - options: --strip-components=1
+    - enforce_toplevel: False
+
+/etc/systemd/system/prometheus.service:
+  file.managed:
+    - source: salt://prometheus/prometheus.service
+    - user: root
+    - group: root
+    - mode: 644
+
+prometheus-service:
+  service.running:
+    - name: prometheus
+    - enable: True
+    - watch:
+      - file: /opt/prometheus/prometheus.yml
+
+
+/opt/prometheus/prometheus.yml:
+  file.managed:
+    - source: salt://prometheus/prometheus.yml
+    - user: prometheus
+    - group: prometheus
+    - mode: 664
+
+{# Set up nginx to reverse-proxy to prometheus in production #}
+{% if grains['id'] == 'prod' %}
+/etc/nginx/sites-available/prometheus.conf:
+  file.managed:
+    - source: salt://prometheus/prometheus.conf.jinja2
+    - template: jinja
+    - user: root
+    - group: root
+    - mode: 644
+    - makedirs: True
+
+/etc/nginx/sites-enabled/prometheus.conf:
+  file.symlink:
+    - target: /etc/nginx/sites-available/prometheus.conf
+    - makedirs: True
+    - user: root
+    - group: root
+    - mode: 644
+{% endif %}
--- a/salt/salt/prometheus/prometheus.conf.jinja2
+++ b/salt/salt/prometheus/prometheus.conf.jinja2
@ -0,0 +1,21 @@
+server {
+    listen 443 ssl http2;
+    listen [::]:443 ssl http2;
+
+    {% for ip in pillar['developer_ips'] %}
+    allow {{ ip }};
+    {% endfor %}
+    deny all;
+
+    add_header Strict-Transport-Security "max-age={{ pillar['hsts_max_age'] }}; includeSubDomains; preload" always;
+
+    server_name {{ pillar['prometheus_server_name'] }};
+
+    location / {
+        proxy_set_header Host $host;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+        proxy_redirect off;
+        proxy_pass http://localhost:9090;
+    }
+}
--- a/salt/salt/prometheus/prometheus.service
+++ b/salt/salt/prometheus/prometheus.service
@ -0,0 +1,14 @@
+[Unit]
+Description=Prometheus Server
+After=syslog.target network.target
+
+[Service]
+Type=simple
+RemainAfterExit=no
+WorkingDirectory=/opt/prometheus
+User=prometheus
+Group=prometheus
+ExecStart=/opt/prometheus/prometheus --config.file=/opt/prometheus/prometheus.yml --log.level info
+
+[Install]
+WantedBy=multi-user.target
--- a/salt/salt/prometheus/prometheus.yml
+++ b/salt/salt/prometheus/prometheus.yml
@ -0,0 +1,23 @@
+global:
+  scrape_interval: 30s
+  evaluation_interval: 30s
+
+scrape_configs:
+  - job_name: "node"
+    static_configs:
+      - targets: ['localhost:9100']
+
+  - job_name: "redis"
+    static_configs:
+      - targets: ['localhost:9121']
+
+  - job_name: "postgres"
+    static_configs:
+      - targets: ['localhost:9187']
+
+  - job_name: "tildes"
+    scheme: https
+    static_configs:
+      - targets: ['localhost:443']
+    tls_config:
+      insecure_skip_verify: true
--- a/salt/salt/prometheus/user.sls
+++ b/salt/salt/prometheus/user.sls
@ -0,0 +1,7 @@
+prometheus-user:
+  group.present:
+    - name: prometheus
+  user.present:
+    - name: prometheus
+    - groups: [prometheus]
+    - createhome: False
--- a/salt/salt/python.sls
+++ b/salt/salt/python.sls
@ -0,0 +1,58 @@
+{% from 'common.jinja2' import app_dir, bin_dir, python_version, venv_dir %}
+
+pyenv-deps:
+  pkg.installed:
+    - pkgs:
+      - build-essential
+      - curl
+      - libbz2-dev
+      - libncurses5-dev
+      - libncursesw5-dev
+      - libreadline-dev
+      - libsqlite3-dev
+      - libssl-dev
+      - llvm
+      - make
+      - wget
+      - xz-utils
+      - zlib1g-dev
+
+python-3.6:
+  pyenv.installed:
+    - name: {{ python_version }}
+    - default: True
+    - require:
+      - pkg: pyenv-deps
+
+delete-obsolete-venv:
+  file.absent:
+    - name: {{ venv_dir }}
+    - unless: {{ bin_dir }}/python --version | grep {{ python_version }}
+
+# Salt seems to use the deprecated pyvenv script, manual for now
+venv-setup:
+  pkg.installed:
+    - name: python3-venv
+  cmd.run:
+    - name: /usr/local/pyenv/versions/{{ python_version }}/bin/python -m venv {{ venv_dir }}
+    - creates: {{ venv_dir }}
+    - require:
+      - pkg: python3-venv
+      - pyenv: {{ python_version }}
+
+pip-installs:
+  pip.installed:
+    - requirements: {{ app_dir }}/requirements.txt
+    - bin_env: {{ venv_dir }}
+  require:
+    - cmd: venv-setup
+    - pkg: pip-deps
+
+self-install:
+  pip.installed:
+    - bin_env: {{ venv_dir }}
+    - editable:
+      - {{ app_dir }}
+    - require:
+      - cmd: venv-setup
+    - unless: ls {{ venv_dir }}/lib/python3.6/site-packages/tildes.egg-link
--- a/salt/salt/rabbitmq/definitions.json
+++ b/salt/salt/rabbitmq/definitions.json
@ -0,0 +1 @@
+{"exchanges":[{"name":"pgsql_events","vhost":"/","type":"topic","durable":true,"auto_delete":false,"internal":false,"arguments":{}}]}
--- a/salt/salt/rabbitmq/init.sls
+++ b/salt/salt/rabbitmq/init.sls
@ -0,0 +1,82 @@
+erlang:
+  pkgrepo.managed:
+    - name: deb http://packages.erlang-solutions.com/ubuntu/ xenial contrib
+    - dist: xenial
+    - file: /etc/apt/sources.list.d/erlang.list
+    - key_url: https://packages.erlang-solutions.com/ubuntu/erlang_solutions.asc
+    - require_in:
+      - pkg: rabbitmq-server
+  file.managed:
+    - name: /etc/apt/preferences.d/erlang
+    - mode: 755
+    - contents: |
+        Package: erlang*
+        Pin: version 1:20.3-1
+        Pin-Priority: 1000
+    - require_in:
+      - pkg: rabbitmq-server
+
+rabbitmq:
+  pkgrepo.managed:
+    - name: deb http://www.rabbitmq.com/debian/ testing main
+    - dist: testing
+    - file: /etc/apt/sources.list.d/rabbitmq.list
+    - key_url: https://www.rabbitmq.com/rabbitmq-release-signing-key.asc
+    - require_in:
+      - pkg: rabbitmq-server
+  pkg.installed:
+    - name: rabbitmq-server
+    - refresh: True
+
+rabbitmq-server.service:
+  service.running:
+    - enable: True
+    - watch:
+      - file: /etc/rabbitmq/rabbitmq.config
+      - file: /etc/rabbitmq/definitions.json
+
+rabbitmq-management:
+  cmd.run:
+    - name: rabbitmq-plugins enable rabbitmq_management
+    - unless: 'rabbitmq-plugins list | grep \\[E.*rabbitmq_management'
+
+/usr/local/bin/rabbitmqadmin:
+  cmd.run:
+    - name: wget http://localhost:15672/cli/rabbitmqadmin -O /usr/local/bin/rabbitmqadmin
+    - creates: /usr/local/bin/rabbitmqadmin
+  file.managed:
+    - mode: 755
+
+/etc/rabbitmq/rabbitmq.config:
+  file.managed:
+    - source: salt://rabbitmq/rabbitmq.config
+    - group: rabbitmq
+    - mode: 644
+
+/etc/rabbitmq/definitions.json:
+  file.managed:
+    - source: salt://rabbitmq/definitions.json
+    - group: rabbitmq
+    - mode: 644
+
+install-pg-amqp-bridge:
+  archive.extracted:
+    - name: /usr/local/bin
+    - source:
+      - https://github.com/subzerocloud/pg-amqp-bridge/releases/download/0.0.5/pg-amqp-bridge-0.0.5-x86_64-unknown-linux-gnu.tar.gz
+    - source_hash: sha256=8194c3307fe7954a0ef1ba66d2f51e14647756d0f87ddd468ef0dc3fbc8476fe
+    - unless: ls /usr/local/bin/pg-amqp-bridge
+    - enforce_toplevel: False
+
+/etc/systemd/system/pg-amqp-bridge.service:
+  file.managed:
+    - source: salt://rabbitmq/pg-amqp-bridge.service
+    - user: root
+    - group: root
+    - mode: 644
+    - require_in:
+      - pg-amqp-bridge.service
+
+pg-amqp-bridge.service:
+  service.running:
+    - enable: True
--- a/salt/salt/rabbitmq/pg-amqp-bridge.service
+++ b/salt/salt/rabbitmq/pg-amqp-bridge.service
@ -0,0 +1,14 @@
+[Unit]
+Description=pg-amqp-bridge - send pgsql NOTIFY to rabbitmq
+Requires=rabbitmq-server.service
+After=rabbitmq-server.service
+PartOf=rabbitmq-server.service
+
+[Service]
+Environment="POSTGRESQL_URI=postgres://tildes@%2Frun%2Fpostgresql/tildes" "AMQP_URI=amqp://localhost//" "BRIDGE_CHANNELS=pgsql_events:pgsql_events" "DELIVERY_MODE=PERSISTENT"
+ExecStart=/usr/local/bin/pg-amqp-bridge
+Restart=always
+RestartSec=5
+
+[Install]
+WantedBy=multi-user.target
--- a/salt/salt/rabbitmq/rabbitmq.config
+++ b/salt/salt/rabbitmq/rabbitmq.config
@ -0,0 +1,5 @@
+[
+{rabbitmq_management, [
+  {load_definitions, "/etc/rabbitmq/definitions.json"}
+  ]}
+].
--- a/salt/salt/raven.sls
+++ b/salt/salt/raven.sls
@ -0,0 +1,6 @@
+{% from 'common.jinja2' import app_dir, venv_dir %}
+
+raven-pip-install:
+  pip.installed:
+    - name: raven
+    - bin_env: {{ venv_dir }}
--- a/salt/salt/redis/init.sls
+++ b/salt/salt/redis/init.sls
@ -0,0 +1,144 @@
+{% set redis_version = '4.0.9' %}
+
+unpack-redis:
+  archive.extracted:
+    - name: /tmp/redis-{{ redis_version }}
+    - source:
+      - salt://redis/{{ redis_version }}.tar.gz
+      - https://github.com/antirez/redis/archive/{{ redis_version }}.tar.gz
+    - source_hash: sha256=e18eebc08a4ccf48ac28aed692c69cf7b03f188d890803e7ccc6889c049f10b4
+    - unless: /usr/local/bin/redis-server --version | grep v={{ redis_version }}
+    - options: --strip-components=1
+    - enforce_toplevel: False
+
+install-redis:
+  pkg.installed:
+    - pkgs:
+      - build-essential
+  cmd.run:
+    - cwd: /tmp/redis-{{ redis_version }}/
+    - names:
+      - make
+      - make install
+    - onchanges:
+      - archive: unpack-redis
+
+redis-user:
+  group.present:
+    - name: redis
+  user.present:
+    - name: redis
+    - groups: [redis]
+    - createhome: False
+
+/run/redis:
+  file.directory:
+    - user: redis
+    - group: redis
+    - mode: 755
+    - require:
+      - user: redis-user
+
+/var/lib/redis:
+  file.directory:
+    - user: redis
+    - group: redis
+    - mode: 700
+    - require:
+      - user: redis-user
+
+/var/log/redis:
+  file.directory:
+    - user: redis
+    - group: redis
+    - mode: 744
+    - require:
+      - user: redis-user
+
+/etc/redis.conf:
+  file.managed:
+    - source: salt://redis/redis.conf.jinja2
+    - template: jinja
+    - user: redis
+    - group: redis
+    - mode: 600
+    - require:
+      - user: redis-user
+
+/etc/systemd/system/redis.service:
+  file.managed:
+    - source: salt://redis/redis.service
+    - user: root
+    - group: root
+    - mode: 644
+    - require_in:
+      - service: redis.service
+
+# add the service file for disabling transparent hugepage
+/etc/systemd/system/transparent_hugepage.service:
+  file.managed:
+    - source: salt://redis/transparent_hugepage.service
+    - user: root
+    - group: root
+    - mode: 644
+    - require_in:
+      - service: disable-transparent-hugepage
+
+# enable the "disable transparent hugepage" service, and run it + restart redis if necessary
+disable-transparent-hugepage:
+  service.enabled:
+    - name: transparent_hugepage.service
+  cmd.run:
+    - name: systemctl start transparent_hugepage.service && systemctl restart redis.service
+    - unless: 'cat /sys/kernel/mm/transparent_hugepage/enabled | grep \\[never\\]'
+
+# Set kernel overcommit mode (recommended for Redis)
+overcommit-memory:
+  # will take effect immediately
+  cmd.run:
+    - name: sysctl vm.overcommit_memory=1
+    - unless: sysctl -n vm.overcommit_memory | grep 1
+
+  # makes the setting permanent but requires a restart
+  file.append:
+    - name: /etc/sysctl.conf
+    - text: 'vm.overcommit_memory = 1'
+
+redis.service:
+  service.running:
+    - enable: True
+    - watch:
+      - file: /etc/redis.conf
+    - require:
+      - user: redis-user
+      - cmd: install-redis
+
+/run/redis_breached_passwords:
+  file.directory:
+    - user: redis
+    - group: redis
+    - mode: 755
+    - require:
+      - user: redis-user
+
+/etc/redis_breached_passwords.conf:
+  file.managed:
+    - source: salt://redis/redis_breached_passwords.conf
+    - user: redis
+    - group: redis
+    - mode: 600
+
+/etc/systemd/system/redis_breached_passwords.service:
+  file.managed:
+    - source: salt://redis/redis_breached_passwords.service
+    - user: root
+    - group: root
+    - mode: 644
+    - require_in:
+      - service: redis_breached_passwords.service
+
+redis_breached_passwords.service:
+  service.running:
+    - enable: True
+    - watch:
+      - file: /etc/redis_breached_passwords.conf
--- a/salt/salt/redis/modules/rebloom.sls
+++ b/salt/salt/redis/modules/rebloom.sls
@ -0,0 +1,14 @@
+rebloom-clone:
+  git.latest:
+    - name: https://github.com/RedisLabsModules/rebloom
+    - rev: 4947c9a75838688df56fc818729b93bf36588400
+    - target: /opt/rebloom
+
+rebloom-make:
+  cmd.run:
+    - name: make
+    - cwd: /opt/rebloom
+    - onchanges:
+      - git: rebloom-clone
+    - require_in:
+      - service: redis_breached_passwords.service
--- a/salt/salt/redis/modules/redis-cell.sls
+++ b/salt/salt/redis/modules/redis-cell.sls
@ -0,0 +1,20 @@
+redis-cell-unpack:
+  archive.extracted:
+    - name: /opt/redis-cell
+    - source:
+      - salt://redis/modules/redis-cell-v0.2.1-x86_64-unknown-linux-gnu.tar.gz
+      - https://github.com/brandur/redis-cell/releases/download/v0.2.1/redis-cell-v0.2.1-x86_64-unknown-linux-gnu.tar.gz
+    - source_hash: sha256=9427fb100f4cada817f30f854ead7f233de32948a0ec644f15988c275a2ed1cb
+    - if_missing: /opt/redis-cell
+    - enforce_toplevel: False
+    - require_in:
+      - service: redis.service
+
+redis-cell-loadmodule-line:
+  file.accumulated:
+    - name: redis_loadmodule_lines
+    - filename: /etc/redis.conf
+    - text:
+      - 'loadmodule /opt/redis-cell/libredis_cell.so'
+    - require_in:
+      - file: /etc/redis.conf
--- a/salt/salt/redis/redis.conf.jinja2
+++ b/salt/salt/redis/redis.conf.jinja2
--- a/salt/salt/redis/redis.service
+++ b/salt/salt/redis/redis.service
@ -0,0 +1,14 @@
+[Unit]
+Description=redis daemon
+After=network.target
+
+[Service]
+PIDFile=/run/redis/pid
+User=redis
+Group=redis
+RuntimeDirectory=redis
+ExecStart=/usr/local/bin/redis-server /etc/redis.conf
+Restart=always
+
+[Install]
+WantedBy=multi-user.target
--- a/salt/salt/redis/redis_breached_passwords.conf
+++ b/salt/salt/redis/redis_breached_passwords.conf
@ -0,0 +1,24 @@
+loadmodule /opt/rebloom/rebloom.so
+bind 127.0.0.1
+
+# only listen on unix socket
+port 0
+
+unixsocket /run/redis_breached_passwords/socket
+unixsocketperm 777
+
+timeout 0
+
+supervised systemd
+pidfile /run/redis_breached_passwords/pid
+
+loglevel notice
+logfile ""
+
+databases 1
+rdbchecksum yes
+
+dir /var/lib/redis
+dbfilename breached_passwords_dump.rdb
+
+appendonly no
--- a/salt/salt/redis/redis_breached_passwords.service
+++ b/salt/salt/redis/redis_breached_passwords.service
@ -0,0 +1,14 @@
+[Unit]
+Description=redis breached passwords daemon
+After=network.target
+
+[Service]
+PIDFile=/run/redis_breached_passwords/pid
+User=redis
+Group=redis
+RuntimeDirectory=redis_breached_passwords
+ExecStart=/usr/local/bin/redis-server /etc/redis_breached_passwords.conf
+Restart=always
+
+[Install]
+WantedBy=multi-user.target
--- a/salt/salt/redis/transparent_hugepage.service
+++ b/salt/salt/redis/transparent_hugepage.service
@ -0,0 +1,11 @@
+[Unit]
+Description=Disable transparent hugepage for redis
+Before=redis.service
+
+[Service]
+Type=oneshot
+ExecStart=/bin/bash -c 'echo never > /sys/kernel/mm/transparent_hugepage/enabled'
+ExecStart=/bin/bash -c 'echo never > /sys/kernel/mm/transparent_hugepage/defrag'
+
+[Install]
+RequiredBy=redis.service
--- a/salt/salt/scripts/activate.sh.jinja2
+++ b/salt/salt/scripts/activate.sh.jinja2
@ -0,0 +1,7 @@
+{% from 'common.jinja2' import app_dir, bin_dir -%}
+#!/bin/bash
+#
+# Simple convenience script to activate the venv and switch to the app dir
+# (Needs to be run by sourcing or it won't do anything)
+cd {{ app_dir }}
+source {{ bin_dir }}/activate
--- a/salt/salt/scripts/generate-site-icons.sh.jinja2
+++ b/salt/salt/scripts/generate-site-icons.sh.jinja2
@ -0,0 +1,5 @@
+{% from 'common.jinja2' import app_dir -%}
+{% from 'site-icons-spriter.sls' import site_icons_venv_dir, site_icons_data_dir -%}
+#!/bin/bash
+{{ site_icons_venv_dir }}/bin/glue --sprite-namespace= --namespace= --retina --css-template={{ app_dir }}/scripts/site-icons-spriter/css_template.jinja2 {{ site_icons_data_dir }}/site-icons {{ site_icons_data_dir }}/output
+cp {{ site_icons_data_dir }}/output/*.png {{ app_dir }}/static/images
--- a/salt/salt/scripts/init.sls
+++ b/salt/salt/scripts/init.sls
@ -0,0 +1,7 @@
+/usr/local/bin/activate:
+  file.managed:
+    - source: salt://scripts/activate.sh.jinja2
+    - template: jinja
+    - user: root
+    - group: root
+    - mode: 755
--- a/salt/salt/self-signed-cert.sls
+++ b/salt/salt/self-signed-cert.sls
@ -0,0 +1,17 @@
+self-signed-cert:
+  pkg.installed:
+    - name: python3-openssl
+  module.run:
+    - tls.create_self_signed_cert:
+      - days: 3650
+    - require:
+      - pkg: python3-openssl
+    - unless: ls /etc/pki/tls/certs/localhost.key
+  file.managed:
+    - name: /etc/pki/tls/certs/localhost.key
+    - mode: 600
+    - replace: False
+    - require:
+      - module: self-signed-cert
+    - require_in:
+      - service: nginx
--- a/salt/salt/sentry/common.jinja2
+++ b/salt/salt/sentry/common.jinja2
@ -0,0 +1,4 @@
+{% set sentry_cfg_dir = '/etc/sentry' %}
+
+{% set sentry_venv_dir = '/opt/venvs/sentry' %}
+{% set sentry_bin_dir = sentry_venv_dir + '/bin' %}
--- a/salt/salt/sentry/config.yml.jinja2
+++ b/salt/salt/sentry/config.yml.jinja2
@ -0,0 +1,64 @@
+# While a lot of configuration in Sentry can be changed via the UI, for all
+# new-style config (as of 8.0) you can also declare values here in this file
+# to enforce defaults or to ensure they cannot be changed via the UI. For more
+# information see the Sentry documentation.
+
+###############
+# Mail Server #
+###############
+
+mail.backend: 'dummy'  # Use dummy if you want to disable email entirely
+# mail.host: 'localhost'
+# mail.port: 25
+# mail.username: ''
+# mail.password: ''
+# mail.use-tls: false
+# The email address to send on behalf of
+# mail.from: 'root@localhost'
+
+# If you'd like to configure email replies, enable this.
+# mail.enable-replies: false
+
+# When email-replies are enabled, this value is used in the Reply-To header
+# mail.reply-hostname: ''
+
+# If you're using mailgun for inbound mail, set your API key and configure a
+# route to forward to /api/hooks/mailgun/inbound/
+# mail.mailgun-api-key: ''
+
+###################
+# System Settings #
+###################
+
+# If this file ever becomes compromised, it's important to regenerate your a new key
+# Changing this value will result in all current sessions being invalidated.
+# A new key can be generated with `$ sentry config generate-secret-key`
+system.secret-key: '{{ pillar['sentry_secret'] }}'
+
+# The ``redis.clusters`` setting is used, unsurprisingly, to configure Redis
+# clusters. These clusters can be then referred to by name when configuring
+# backends such as the cache, digests, or TSDB backend.
+redis.clusters:
+  default:
+    hosts:
+      0:
+        host: 127.0.0.1
+        port: 6379
+        db: 10
+
+################
+# File storage #
+################
+
+# Uploaded media uses these `filestore` settings. The available
+# backends are either `filesystem` or `s3`.
+
+filestore.backend: 'filesystem'
+filestore.options:
+  location: '/tmp/sentry-files'
+
+# filestore.backend: 's3'
+# filestore.options:
+#   access_key: 'AKIXXXXXX'
+#   secret_key: 'XXXXXXX'
+#   bucket_name: 's3-bucket-name'
--- a/salt/salt/sentry/init.sls
+++ b/salt/salt/sentry/init.sls
@ -0,0 +1,143 @@
+{% from 'sentry/common.jinja2' import sentry_bin_dir, sentry_cfg_dir, sentry_venv_dir %}
+
+sentry-user:
+  group.present:
+    - name: sentry
+  user.present:
+    - name: sentry
+    - groups: [sentry]
+
+build-deps:
+  pkg.installed:
+    - pkgs:
+      - python-setuptools
+      - python-dev
+      - python-pip
+      - python-virtualenv
+      - libxslt1-dev
+      - gcc
+      - libffi-dev
+      - libjpeg-dev
+      - libxml2-dev
+      - libxslt-dev
+      - libyaml-dev
+      - libpq-dev
+      - zlib1g-dev
+      - postgresql-server-dev-{{ pillar['postgresql_version'] }}
+
+{{ sentry_venv_dir }}:
+  virtualenv.managed:
+    - system_site_packages: False
+
+pip-install:
+  pip.installed:
+    - name: sentry
+    - bin_env: {{ sentry_venv_dir }}
+
+init-sentry:
+  cmd.run:
+    - name: {{ sentry_bin_dir }}/sentry init {{ sentry_cfg_dir }}
+    - creates: {{ sentry_cfg_dir }}
+
+postgres-setup:
+  postgres_user.present:
+    - name: sentry
+  postgres_database.present:
+    - name: sentry
+    - owner: sentry
+  # sentry migrations should add this, but it fails due to not being superuser
+  postgres_extension.present:
+    - name: citext
+    - maintenance_db: sentry
+
+{{ sentry_cfg_dir }}/sentry.conf.py:
+  file.managed:
+    - source: salt://sentry/sentry.conf.py
+
+{{ sentry_cfg_dir }}/config.yml:
+  file.managed:
+    - source: salt://sentry/config.yml.jinja2
+    - template: jinja
+
+update-pg_hba:
+  file.accumulated:
+    - name: pg_hba_lines
+    - filename: /etc/postgresql/{{ pillar['postgresql_version'] }}/main/pg_hba.conf
+    - text: 'host    sameuser        sentry      127.0.0.1/32   trust'
+    - require_in:
+      - file: /etc/postgresql/{{ pillar['postgresql_version'] }}/main/pg_hba.conf
+
+create-sentry-db:
+  cmd.run:
+    - name: {{ sentry_bin_dir }}/sentry upgrade --noinput
+    - env:
+      - SENTRY_CONF: '{{ sentry_cfg_dir }}'
+    - onchanges:
+      - cmd: init-sentry
+
+create-sentry-user:
+  cmd.run:
+    - name: {{ sentry_bin_dir }}/sentry createuser --no-input --email {{ pillar['sentry_email'] }} --password {{ pillar['sentry_password'] }}
+    - env:
+      - SENTRY_CONF: '{{ sentry_cfg_dir }}'
+    - onchanges:
+      - cmd: init-sentry
+
+/etc/systemd/system/sentry-web.service:
+  file.managed:
+    - source: salt://sentry/sentry-web.service.jinja2
+    - template: jinja
+    - user: root
+    - group: root
+    - mode: 644
+
+/etc/systemd/system/sentry-worker.service:
+  file.managed:
+    - source: salt://sentry/sentry-worker.service.jinja2
+    - template: jinja
+    - user: root
+    - group: root
+    - mode: 644
+
+/etc/systemd/system/sentry-cron.service:
+  file.managed:
+  - source: salt://sentry/sentry-cron.service.jinja2
+  - template: jinja
+  - user: root
+  - group: root
+  - mode: 644
+
+sentry-web:
+  service.running:
+    - enable: True
+
+sentry-worker:
+  service.running:
+    - enable: True
+
+sentry-cron:
+  service.running:
+    - enable: True
+
+sentry-cleanup:
+  cron.present:
+    - name: {{ sentry_bin_dir }}/sentry cleanup --days=30
+    - hour: 4
+    - minute: 0
+
+/etc/nginx/sites-available/sentry.conf:
+  file.managed:
+    - source: salt://sentry/sentry.conf.jinja2
+    - template: jinja
+    - user: root
+    - group: root
+    - mode: 644
+    - makedirs: True
+
+/etc/nginx/sites-enabled/sentry.conf:
+  file.symlink:
+    - target: /etc/nginx/sites-available/sentry.conf
+    - makedirs: True
+    - user: root
+    - group: root
+    - mode: 644
--- a/salt/salt/sentry/sentry-cron.service.jinja2
+++ b/salt/salt/sentry/sentry-cron.service.jinja2
@ -0,0 +1,15 @@
+{% from 'sentry/common.jinja2' import sentry_bin_dir, sentry_cfg_dir, sentry_venv_dir -%}
+[Unit]
+Description=Sentry Beat Service
+After=network.target
+
+[Service]
+Type=simple
+User=sentry
+Group=sentry
+WorkingDirectory={{ sentry_venv_dir }}
+Environment=SENTRY_CONF={{ sentry_cfg_dir }}
+ExecStart={{ sentry_bin_dir }}/sentry run cron
+
+[Install]
+WantedBy=multi-user.target
--- a/salt/salt/sentry/sentry-web.service.jinja2
+++ b/salt/salt/sentry/sentry-web.service.jinja2
@ -0,0 +1,17 @@
+{% from 'sentry/common.jinja2' import sentry_bin_dir, sentry_cfg_dir, sentry_venv_dir -%}
+[Unit]
+Description=Sentry Main Service
+After=network.target
+Requires=sentry-worker.service
+Requires=sentry-cron.service
+
+[Service]
+Type=simple
+User=sentry
+Group=sentry
+WorkingDirectory={{ sentry_venv_dir }}
+Environment=SENTRY_CONF={{ sentry_cfg_dir }}
+ExecStart={{ sentry_bin_dir }}/sentry run web
+
+[Install]
+WantedBy=multi-user.target
--- a/salt/salt/sentry/sentry-worker.service.jinja2
+++ b/salt/salt/sentry/sentry-worker.service.jinja2
@ -0,0 +1,15 @@
+{% from 'sentry/common.jinja2' import sentry_bin_dir, sentry_cfg_dir, sentry_venv_dir -%}
+[Unit]
+Description=Sentry Background Worker
+After=network.target
+
+[Service]
+Type=simple
+User=sentry
+Group=sentry
+WorkingDirectory={{ sentry_venv_dir }}
+Environment=SENTRY_CONF={{ sentry_cfg_dir }}
+ExecStart={{ sentry_bin_dir }}/sentry run worker
+
+[Install]
+WantedBy=multi-user.target
--- a/salt/salt/sentry/sentry.conf.jinja2
+++ b/salt/salt/sentry/sentry.conf.jinja2
@ -0,0 +1,21 @@
+server {
+    listen 443 ssl http2;
+    listen [::]:443 ssl http2;
+
+    {% for ip in pillar['developer_ips'] %}
+    allow {{ ip }};
+    {% endfor %}
+    deny all;
+
+    add_header Strict-Transport-Security "max-age={{ pillar['hsts_max_age'] }}; includeSubDomains; preload" always;
+
+    server_name {{ pillar['sentry_server_name'] }};
+
+    location / {
+        proxy_set_header Host $host;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+        proxy_redirect off;
+        proxy_pass http://localhost:9000;
+    }
+}
--- a/salt/salt/sentry/sentry.conf.py
+++ b/salt/salt/sentry/sentry.conf.py
@ -0,0 +1,135 @@
+# This file is just Python, with a touch of Django which means
+# you can inherit and tweak settings to your hearts content.
+from sentry.conf.server import *
+
+import os.path
+
+CONF_ROOT = os.path.dirname(__file__)
+
+DATABASES = {
+    'default': {
+        'ENGINE': 'sentry.db.postgres',
+        'NAME': 'sentry',
+        'USER': 'sentry',
+        'PASSWORD': '',
+        'HOST': '127.0.0.1',
+        'PORT': '',
+        'AUTOCOMMIT': True,
+        'ATOMIC_REQUESTS': False,
+    }
+}
+
+# You should not change this setting after your database has been created
+# unless you have altered all schemas first
+SENTRY_USE_BIG_INTS = True
+
+# If you're expecting any kind of real traffic on Sentry, we highly recommend
+# configuring the CACHES and Redis settings
+
+###########
+# General #
+###########
+
+# Instruct Sentry that this install intends to be run by a single organization
+# and thus various UI optimizations should be enabled.
+SENTRY_SINGLE_ORGANIZATION = True
+DEBUG = False
+
+#########
+# Cache #
+#########
+
+# Sentry currently utilizes two separate mechanisms. While CACHES is not a
+# requirement, it will optimize several high throughput patterns.
+
+# If you wish to use memcached, install the dependencies and adjust the config
+# as shown:
+#
+#   pip install python-memcached
+#
+# CACHES = {
+#     'default': {
+#         'BACKEND': 'django.core.cache.backends.memcached.MemcachedCache',
+#         'LOCATION': ['127.0.0.1:11211'],
+#     }
+# }
+
+# A primary cache is required for things such as processing events
+SENTRY_CACHE = 'sentry.cache.redis.RedisCache'
+
+#########
+# Queue #
+#########
+
+# See https://docs.sentry.io/on-premise/server/queue/ for more
+# information on configuring your queue broker and workers. Sentry relies
+# on a Python framework called Celery to manage queues.
+
+BROKER_URL = 'redis://localhost:6379'
+
+###############
+# Rate Limits #
+###############
+
+# Rate limits apply to notification handlers and are enforced per-project
+# automatically.
+
+SENTRY_RATELIMITER = 'sentry.ratelimits.redis.RedisRateLimiter'
+
+##################
+# Update Buffers #
+##################
+
+# Buffers (combined with queueing) act as an intermediate layer between the
+# database and the storage API. They will greatly improve efficiency on large
+# numbers of the same events being sent to the API in a short amount of time.
+# (read: if you send any kind of real data to Sentry, you should enable buffers)
+
+SENTRY_BUFFER = 'sentry.buffer.redis.RedisBuffer'
+
+##########
+# Quotas #
+##########
+
+# Quotas allow you to rate limit individual projects or the Sentry install as
+# a whole.
+
+SENTRY_QUOTAS = 'sentry.quotas.redis.RedisQuota'
+
+########
+# TSDB #
+########
+
+# The TSDB is used for building charts as well as making things like per-rate
+# alerts possible.
+
+SENTRY_TSDB = 'sentry.tsdb.redis.RedisTSDB'
+
+###########
+# Digests #
+###########
+
+# The digest backend powers notification summaries.
+
+SENTRY_DIGESTS = 'sentry.digests.backends.redis.RedisBackend'
+
+##############
+# Web Server #
+##############
+
+# If you're using a reverse SSL proxy, you should enable the X-Forwarded-Proto
+# header and uncomment the following settings
+SECURE_PROXY_SSL_HEADER = ('HTTP_X_FORWARDED_PROTO', 'https')
+SESSION_COOKIE_SECURE = True
+CSRF_COOKIE_SECURE = True
+
+# If you're not hosting at the root of your web server,
+# you need to uncomment and set it to the path where Sentry is hosted.
+#FORCE_SCRIPT_NAME = '/sentry'
+
+SENTRY_WEB_HOST = '0.0.0.0'
+SENTRY_WEB_PORT = 9000
+SENTRY_WEB_OPTIONS = {
+    # 'workers': 3,  # the number of web workers
+    # 'protocol': 'uwsgi',  # Enable uwsgi protocol instead of http
+}
--- a/salt/salt/site-icons-spriter.sls
+++ b/salt/salt/site-icons-spriter.sls
@ -0,0 +1,42 @@
+{% from 'common.jinja2' import app_dir, app_username, python_version %}
+
+{% set site_icons_venv_dir = '/opt/venvs/site-icons-spriter' %}
+{% set site_icons_data_dir = '/var/lib/site-icons-spriter' %}
+
+# Salt seems to use the deprecated pyvenv script, manual for now
+site-icons-venv-setup:
+  cmd.run:
+    - name: /usr/local/pyenv/versions/{{ python_version }}/bin/python -m venv {{ site_icons_venv_dir }}
+    - creates: {{ site_icons_venv_dir }}
+    - require:
+      - pkg: python3-venv
+      - pyenv: {{ python_version }}
+
+site-icons-pip-installs:
+  cmd.run:
+    - name: {{ site_icons_venv_dir }}/bin/pip install glue
+    - unless: ls {{ site_icons_venv_dir }}/lib/python3.6/site-packages/glue
+
+site-icons-output-placeholder:
+  file.managed:
+    - name: {{ site_icons_data_dir }}/output/site-icons.css
+    - contents: ''
+    - allow_empty: True
+    - makedirs: True
+    - user: {{ app_username }}
+    - group: {{ app_username }}
+    - unless: ls {{ site_icons_data_dir }}/output/site-icons.css
+
+site-icons-input-folder:
+  file.directory:
+    - name: {{ site_icons_data_dir }}/site-icons
+    - user: {{ app_username }}
+    - group: {{ app_username }}
+
+/usr/local/bin/generate-site-icons:
+  file.managed:
+    - source: salt://scripts/generate-site-icons.sh.jinja2
+    - template: jinja
+    - user: root
+    - group: root
+    - mode: 755
--- a/salt/salt/top.sls
+++ b/salt/salt/top.sls
@ -0,0 +1,40 @@
+base:
+  'dev or prod':
+    - gunicorn
+    - nginx
+    - nginx.site-config
+    - postgresql
+    - postgresql.site-db
+    - postgresql.pgbouncer
+    - python
+    - redis
+    - redis.modules.rebloom
+    - redis.modules.redis-cell
+    - rabbitmq
+    - scripts
+    - cmark-gfm
+    - prometheus.exporters.node_exporter
+    - prometheus.exporters.postgres_exporter
+    - prometheus.exporters.redis_exporter
+    - consumers
+    - site-icons-spriter
+    - boussole
+    - webassets
+    - cronjobs
+    - final-setup  # keep this state file last
+  'dev':
+    - postgresql.test-db
+    - self-signed-cert
+    - development
+    - prometheus
+  'prod':
+    - nginx.static-sites-config
+    - raven
+  'monitoring':
+    - nginx
+    - self-signed-cert
+    - postgresql
+    - redis
+    - sentry
+    - grafana
+    - prometheus
--- a/salt/salt/webassets.service.jinja2
+++ b/salt/salt/webassets.service.jinja2
@ -0,0 +1,12 @@
+{% from 'common.jinja2' import app_dir, bin_dir -%}
+[Unit]
+Description=Webassets - auto-compile JS files on change
+
+[Service]
+WorkingDirectory={{ app_dir }}
+ExecStart={{ bin_dir }}/webassets -c webassets.yaml watch
+Restart=always
+RestartSec=5
+
+[Install]
+WantedBy=multi-user.target
--- a/salt/salt/webassets.sls
+++ b/salt/salt/webassets.sls
@ -0,0 +1,17 @@
+{% from 'common.jinja2' import app_dir, bin_dir %}
+
+/etc/systemd/system/webassets.service:
+  file.managed:
+    - source: salt://webassets.service.jinja2
+    - template: jinja
+    - user: root
+    - group: root
+    - mode: 644
+    - require_in:
+      - service: webassets.service
+
+webassets.service:
+  service.running:
+    - enable: True
+    - require:
+      - pip: pip-installs
--- a/tildes/alembic.ini
+++ b/tildes/alembic.ini
@ -0,0 +1,38 @@
+[alembic]
+script_location = alembic
+sqlalchemy.url = postgresql+psycopg2://tildes:@/tildes
+
+# Logging configuration
+[loggers]
+keys = root,sqlalchemy,alembic
+
+[handlers]
+keys = console
+
+[formatters]
+keys = generic
+
+[logger_root]
+level = WARN
+handlers = console
+qualname =
+
+[logger_sqlalchemy]
+level = WARN
+handlers =
+qualname = sqlalchemy.engine
+
+[logger_alembic]
+level = INFO
+handlers =
+qualname = alembic
+
+[handler_console]
+class = StreamHandler
+args = (sys.stderr,)
+level = NOTSET
+formatter = generic
+
+[formatter_generic]
+format = %(levelname)-5.5s [%(name)s] %(message)s
+datefmt = %H:%M:%S
--- a/tildes/alembic/env.py
+++ b/tildes/alembic/env.py
@ -0,0 +1,80 @@
+from __future__ import with_statement
+from alembic import context
+from sqlalchemy import engine_from_config, pool
+from logging.config import fileConfig
+
+# this is the Alembic Config object, which provides
+# access to the values within the .ini file in use.
+config = context.config
+
+# Interpret the config file for Python logging.
+# This line sets up loggers basically.
+fileConfig(config.config_file_name)
+
+# import all DatabaseModel subclasses here for autogenerate support
+from tildes.models.comment import (
+    Comment,
+    CommentNotification,
+    CommentTag,
+    CommentVote,
+)
+from tildes.models.group import Group, GroupSubscription
+from tildes.models.log import Log
+from tildes.models.message import MessageConversation, MessageReply
+from tildes.models.topic import Topic, TopicVisit, TopicVote
+from tildes.models.user import User, UserGroupSettings, UserInviteCode
+
+from tildes.models import DatabaseModel
+target_metadata = DatabaseModel.metadata
+
+# other values from the config, defined by the needs of env.py,
+# can be acquired:
+# my_important_option = config.get_main_option("my_important_option")
+# ... etc.
+
+
+def run_migrations_offline():
+    """Run migrations in 'offline' mode.
+
+    This configures the context with just a URL
+    and not an Engine, though an Engine is acceptable
+    here as well.  By skipping the Engine creation
+    we don't even need a DBAPI to be available.
+
+    Calls to context.execute() here emit the given string to the
+    script output.
+
+    """
+    url = config.get_main_option("sqlalchemy.url")
+    context.configure(
+        url=url, target_metadata=target_metadata, literal_binds=True)
+
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+def run_migrations_online():
+    """Run migrations in 'online' mode.
+
+    In this scenario we need to create an Engine
+    and associate a connection with the context.
+
+    """
+    connectable = engine_from_config(
+        config.get_section(config.config_ini_section),
+        prefix='sqlalchemy.',
+        poolclass=pool.NullPool)
+
+    with connectable.connect() as connection:
+        context.configure(
+            connection=connection,
+            target_metadata=target_metadata
+        )
+
+        with context.begin_transaction():
+            context.run_migrations()
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()
--- a/tildes/alembic/script.py.mako
+++ b/tildes/alembic/script.py.mako
@ -0,0 +1,24 @@
+"""${message}
+
+Revision ID: ${up_revision}
+Revises:${" " + down_revision if down_revision else "" | comma,n}
+Create Date: ${create_date}
+
+"""
+from alembic import op
+import sqlalchemy as sa
+${imports if imports else ""}
+
+# revision identifiers, used by Alembic.
+revision = ${repr(up_revision)}
+down_revision = ${repr(down_revision)}
+branch_labels = ${repr(branch_labels)}
+depends_on = ${repr(depends_on)}
+
+
+def upgrade():
+    ${upgrades if upgrades else "pass"}
+
+
+def downgrade():
+    ${downgrades if downgrades else "pass"}
--- a/tildes/boussole.yaml
+++ b/tildes/boussole.yaml
@ -0,0 +1,6 @@
+EXCLUDES: []
+LIBRARY_PATHS: []
+OUTPUT_STYLES: nested
+SOURCES_PATH: scss/
+SOURCE_COMMENTS: false
+TARGET_PATH: static/css/
--- a/tildes/consumers/topic_metadata_generator.py
+++ b/tildes/consumers/topic_metadata_generator.py
@ -0,0 +1,80 @@
+"""Consumer that generates content_metadata for topics."""
+
+from typing import Sequence
+
+from amqpy import Message
+from html5lib import HTMLParser
+import publicsuffix
+
+from tildes.lib.amqp import PgsqlQueueConsumer
+from tildes.lib.string import simplify_string, truncate_string, word_count
+from tildes.lib.url import get_domain_from_url
+from tildes.models.topic import Topic
+
+
+class TopicMetadataGenerator(PgsqlQueueConsumer):
+    """Consumer that generates content_metadata for topics."""
+
+    def __init__(self, queue_name: str, routing_keys: Sequence[str]) -> None:
+        """Initialize the consumer, including the public suffix list."""
+        super().__init__(queue_name, routing_keys)
+
+        # download the public suffix list (would be good to add caching here)
+        psl_file = publicsuffix.fetch()
+        self.public_suffix_list = publicsuffix.PublicSuffixList(psl_file)
+
+    def run(self, msg: Message) -> None:
+        """Process a delivered message."""
+        topic = (
+            self.db_session.query(Topic)
+            .filter_by(topic_id=msg.body['topic_id'])
+            .one()
+        )
+
+        if topic.is_text_type:
+            self._generate_text_metadata(topic)
+        elif topic.is_link_type:
+            self._generate_link_metadata(topic)
+
+    @staticmethod
+    def _generate_text_metadata(topic: Topic) -> None:
+        """Generate metadata for a text topic (word count and excerpt)."""
+        html_tree = HTMLParser().parseFragment(topic.rendered_html)
+
+        # extract the text from all of the HTML elements
+        extracted_text = ''.join(
+            [element_text for element_text in html_tree.itertext()])
+
+        # sanitize unicode, remove leading/trailing whitespace, etc.
+        extracted_text = simplify_string(extracted_text)
+
+        # create a short excerpt by truncating the simplified string
+        excerpt = truncate_string(
+            extracted_text,
+            length=200,
+            truncate_at_chars=' ',
+        )
+
+        topic.content_metadata = {
+            'word_count': word_count(extracted_text),
+            'excerpt': excerpt,
+        }
+
+    def _generate_link_metadata(self, topic: Topic) -> None:
+        """Generate metadata for a link topic (domain)."""
+        if not topic.link:
+            return
+
+        parsed_domain = get_domain_from_url(topic.link)
+        domain = self.public_suffix_list.get_public_suffix(parsed_domain)
+
+        topic.content_metadata = {
+            'domain': domain,
+        }
+
+
+if __name__ == '__main__':
+    TopicMetadataGenerator(
+        queue_name='topic_metadata_generator.q',
+        routing_keys=['topic.created', 'topic.edited'],
+    ).consume_queue()
--- a/tildes/development.ini
+++ b/tildes/development.ini
@ -0,0 +1,49 @@
+[DEFAULT]
+# This setting is used to force the Pyramid app to generate urls using this
+# port. This is necessary when using Vagrant for development so that the urls
+# will include the correct port that's being forwarded from the host to the
+# Vagrant box. This setting's value should match the port defined in the
+# Vagrantfile that's being forwarded to port 443 on the guest.
+# If not using Vagrant, this setting should probably be removed.
+prefixmiddleware_force_port = 4443
+
+[app:main]
+use = egg:tildes
+
+pyramid.includes = pyramid_debugtoolbar
+
+pyramid.reload_templates = true
+
+redis.unix_socket_path = /run/redis/socket
+
+# Requests from the host machine through Vagrant will have their IP as
+# 10.0.2.2 (which is an alias for the loopback interface) so we need
+# to enable the debugtoolbar for that IP as well.
+debugtoolbar.hosts = 127.0.0.1 ::1 10.0.2.2
+
+# Exclude the metrics page from the debug toolbar, since Prometheus scrapes
+# it constantly and we don't need to see that in the list of requests
+debugtoolbar.exclude_prefixes = /metrics
+
+redis.sessions.secret = completely_insecure_secret
+redis.sessions.unix_socket_path = %(redis.unix_socket_path)s
+redis.sessions.prefix = session:
+redis.sessions.cookie_secure = true
+
+# Set session timeout to 10 mins by default, we'll extend it when people log in
+redis.sessions.timeout = 600
+
+sqlalchemy.url = postgresql+psycopg2://tildes:@:6432/tildes
+
+webassets.auto_build = false
+webassets.base_dir = %(here)s/static
+webassets.base_url = /
+webassets.cache = false
+webassets.manifest = json
+
+[server:main]
+use = egg:gunicorn#main
+bind = unix:/run/gunicorn/socket
+workers = 1
+pidfile = /run/gunicorn/pid
+reload = true
--- a/tildes/gunicorn_config.py
+++ b/tildes/gunicorn_config.py
@ -0,0 +1,14 @@
+"""Configuration file for gunicorn."""
+
+from prometheus_client import multiprocess
+
+
+def child_exit(server, worker):  # type: ignore
+    """Mark worker processes as dead for Prometheus when the worker exits.
+
+    Note that this uses the child_exit hook instead of worker_exit so that
+    it's handled by the master process (and will still be called if a worker
+    crashes).
+    """
+    # pylint: disable=unused-argument
+    multiprocess.mark_process_dead(worker.pid)
--- a/tildes/mypy.ini
+++ b/tildes/mypy.ini
@ -0,0 +1,4 @@
+[mypy]
+mypy_path = /opt/tildes/stubs/
+disallow_untyped_defs = true
+ignore_missing_imports = true
--- a/tildes/production.ini.example
+++ b/tildes/production.ini.example
@ -0,0 +1,37 @@
+[DEFAULT]
+
+[app:main]
+use = egg:tildes
+
+redis.unix_socket_path = /run/redis/socket
+
+redis.sessions.secret = SomeReallyLongSecret
+redis.sessions.unix_socket_path = %(redis.unix_socket_path)s
+redis.sessions.prefix = session:
+redis.sessions.cookie_secure = true
+redis.sessions.cookie_max_age = 31536000
+
+# disable the python timeout management in pyramid-session-redis
+redis.sessions.python_expires = false
+redis.sessions.timeout_trigger = 0
+
+# set session timeout to 1 hour by default, we'll extend it when people log in
+redis.sessions.timeout = 3600
+
+sqlalchemy.url = postgresql+psycopg2://tildes:@:6432/tildes
+
+stripe_api_key = sk_live_ActualKeyShouldGoHere
+
+tildes.welcome_message_sender = Deimos
+
+webassets.auto_build = false
+webassets.base_dir = %(here)s/static
+webassets.base_url = /
+webassets.cache = false
+webassets.manifest = json
+
+[server:main]
+use = egg:gunicorn#main
+bind = unix:/run/gunicorn/socket
+workers = 8
+pidfile = /run/gunicorn/pid
--- a/tildes/pylama.ini
+++ b/tildes/pylama.ini
@ -0,0 +1,54 @@
+[pylama]
+linters = mccabe,pycodestyle,pydocstyle,pyflakes,pylint
+skip = alembic/*
+
+# ignored checks:
+#   - D203 - pydocstyle has two mutually exclusive checks (D203/D211)
+#       for whether a class docstring should have a blank line before
+#       it or not. I don't want a blank line, so D203 is disabled.
+#   - D213 - another pair of mutually exclusive pydocstyle checks, this
+#       time for whether a multi-line docstring's summary line should be
+#       on the first or second line. I want it to be on the first line,
+#       so D213 needs to be disabled.
+ignore = D203,D213
+
+[pylama:pylint]
+enable = all
+
+# disabled pylint checks:
+#   - missing-docstring (already reported by pydocstyle)
+#   - too-few-public-methods (more annoying than helpful, especially early on)
+#   - too-many-instance-attributes (overly-picky when models need many)
+#   - locally-disabled (don't need a warning about things I disable)
+#   - locally-enabled (or when checks are (re-)enabled)
+#   - suppressed-message (...a different message when I disable one?)
+disable =
+    missing-docstring,
+    too-few-public-methods,
+    too-many-instance-attributes,
+    locally-disabled,
+    locally-enabled,
+    suppressed-message
+
+# The APIv0 and venusian.AttachInfo classes need to be ignored because pylint
+# can't recognize dynamically-added methods/attrs, so all of the functions in
+# cornice.Service like .get(), .post(), etc. cause errors.
+ignored-classes = APIv0, venusian.AttachInfo
+
+[pylama:tildes/schemas/*]
+# ignored checks for schemas specifically:
+#   - R0201 - method could be a function (for @pre_load-type methods)
+ignore = R0201
+
+[pylama:tests/*]
+# ignored checks for tests specifically:
+#   - D100 - missing module-level docstrings
+#   - C0103 - invalid function names (tests often have very long ones)
+#   - W0212 - access to protected member (useful/necessary for tests sometimes)
+#   - W0621 - redefining name from outer scope (that's how pytest fixtures work)
+#   - E1101 - <something> has no member (mocks add members this can't detect)
+ignore = D100,C0103,W0212,W0621,E1101
+
+[pylama:*/__init__.py]
+# ignore "imported but unused" inside __init__.py files
+ignore = W0611
--- a/tildes/pytest.ini
+++ b/tildes/pytest.ini
@ -0,0 +1,3 @@
+[pytest]
+testpaths = tests
+addopts = -p no:cacheprovider
--- a/tildes/requirements-to-freeze.txt
+++ b/tildes/requirements-to-freeze.txt
@ -0,0 +1,38 @@
+ago
+alembic
+amqpy
+argon2_cffi
+astroid==1.5.3  # pylama has issues with pylint 1.8.1
+bleach
+boussole
+click==5.1  # boussole needs < 6.0
+cornice
+freezegun
+gunicorn
+html5lib
+ipython
+mypy
+mypy-extensions
+prometheus-client
+psycopg2
+publicsuffix2
+pydocstyle
+pylama
+pylama-pylint
+pylint==1.7.5  # pylama has issues with 1.8.1
+pyramid
+pyramid-debugtoolbar
+pyramid-ipython
+pyramid-jinja2
+pyramid-session-redis
+pyramid-tm
+pyramid-webassets
+pytest
+pytest-mock
+SQLAlchemy
+SQLAlchemy-Utils
+stripe
+testing.redis
+webargs
+webtest
+zope.sqlalchemy
--- a/tildes/requirements.txt
+++ b/tildes/requirements.txt
@ -0,0 +1,105 @@
+ago==0.0.92
+alembic==1.0.0
+amqpy==0.13.1
+argh==0.26.2
+argon2-cffi==18.1.0
+astroid==1.5.3
+atomicwrites==1.1.5
+attrs==18.1.0
+backcall==0.1.0
+beautifulsoup4==4.6.0
+bleach==2.1.3
+boussole==1.2.3
+certifi==2018.4.16
+cffi==1.11.5
+chardet==3.0.4
+click==5.1
+colorama==0.3.9
+colorlog==3.1.4
+cornice==3.4.0
+decorator==4.3.0
+freezegun==0.3.10
+gunicorn==19.9.0
+html5lib==1.0.1
+hupper==1.3
+idna==2.7
+ipython==6.4.0
+ipython-genutils==0.2.0
+isort==4.3.4
+jedi==0.12.1
+Jinja2==2.10
+lazy-object-proxy==1.3.1
+libsass==0.14.5
+Mako==1.0.7
+MarkupSafe==1.0
+marshmallow==2.15.3
+mccabe==0.6.1
+more-itertools==4.2.0
+mypy==0.620
+mypy-extensions==0.3.0
+parso==0.3.1
+PasteDeploy==1.5.2
+pathtools==0.1.2
+pexpect==4.6.0
+pickleshare==0.7.4
+plaster==1.0
+plaster-pastedeploy==0.6
+pluggy==0.6.0
+prometheus-client==0.3.0
+prompt-toolkit==1.0.15
+psycopg2==2.7.5
+ptyprocess==0.6.0
+publicsuffix2==2.20160818
+py==1.5.4
+pyaml==17.12.1
+pycodestyle==2.4.0
+pycparser==2.18
+pydocstyle==2.1.1
+pyflakes==2.0.0
+Pygments==2.2.0
+pylama==7.4.3
+pylama-pylint==3.0.1
+pylint==1.7.5
+pyramid==1.9.2
+pyramid-debugtoolbar==4.4
+pyramid-ipython==0.2
+pyramid-jinja2==2.7
+pyramid-mako==1.0.2
+pyramid-session-redis==1.4.1
+pyramid-tm==2.2
+pyramid-webassets==0.9
+pytest==3.6.3
+pytest-mock==1.10.0
+python-dateutil==2.7.3
+python-editor==1.0.3
+PyYAML==3.13
+redis==2.10.6
+repoze.lru==0.7
+requests==2.19.1
+simplegeneric==0.8.1
+simplejson==3.16.0
+six==1.11.0
+snowballstemmer==1.2.1
+SQLAlchemy==1.2.10
+SQLAlchemy-Utils==0.33.3
+stripe==2.0.1
+testing.common.database==2.0.3
+testing.redis==1.1.1
+traitlets==4.3.2
+transaction==2.2.1
+translationstring==1.3
+typed-ast==1.1.0
+urllib3==1.23
+venusian==1.1.0
+waitress==1.1.0
+watchdog==0.8.3
+wcwidth==0.1.7
+webargs==4.0.0
+webassets==0.12.1
+webencodings==0.5.1
+WebOb==1.8.2
+WebTest==2.0.30
+wrapt==1.10.11
+zope.deprecation==4.3.0
+zope.interface==4.5.0
+zope.sqlalchemy==1.0
--- a/tildes/scripts/init.py
+++ b/tildes/scripts/init.py
@ -0,0 +1 @@
+"""Contains standalone scripts that exist outside the app."""
--- a/tildes/scripts/breached_passwords.py
+++ b/tildes/scripts/breached_passwords.py
@ -0,0 +1,177 @@
+"""Command-line tools for managing a breached-passwords bloom filter.
+
+This tool will help with creating and updating a bloom filter in Redis (using
+ReBloom: https://github.com/RedisLabsModules/rebloom) to hold hashes for
+passwords that have been revealed through data breaches (to prevent users from
+using these passwords here). The dumps are likely primarily sourced from Troy
+Hunt's "Pwned Passwords" files:
+https://haveibeenpwned.com/Passwords
+
+Specifically, the commands in this tool allow building the bloom filter
+somewhere else, then the RDB file can be transferred to the production server.
+Note that it is expected that a separate redis server instance is running
+solely for holding this bloom filter. Replacing the RDB file will result in all
+other keys being lost.
+
+Expected usage of this tool should look something like:
+
+On the machine building the bloom filter:
+    python breached_passwords.py init --estimate 350000000
+    python breached_passwords.py addhashes pwned-passwords-1.0.txt
+    python breached_passwords.py addhashes pwned-passwords-update-1.txt
+
+Then the RDB file can simply be transferred to the production server,
+overwriting any previous RDB file.
+
+"""
+
+import subprocess
+from typing import Any
+
+import click
+from redis import ResponseError, StrictRedis
+
+from tildes.lib.password import (
+    BREACHED_PASSWORDS_BF_KEY,
+    BREACHED_PASSWORDS_REDIS_SOCKET,
+)
+
+
+REDIS = StrictRedis(unix_socket_path=BREACHED_PASSWORDS_REDIS_SOCKET)
+
+
+def generate_redis_protocol(*elements: Any) -> str:
+    """Generate a command in the Redis protocol from the specified elements.
+
+    Based on the example Ruby code from
+    https://redis.io/topics/mass-insert#generating-redis-protocol
+    """
+    command = f'*{len(elements)}\r\n'
+
+    for element in elements:
+        element = str(element)
+        command += f'${len(element)}\r\n{element}\r\n'
+
+    return command
+
+
+@click.group()
+def cli() -> None:
+    """Create a functionality-less command group to attach subcommands to."""
+    pass
+
+
+def validate_init_error_rate(ctx: Any, param: Any, value: Any) -> float:
+    """Validate the --error-rate arg for the init command."""
+    # pylint: disable=unused-argument
+    if not 0 < value < 1:
+        raise click.BadParameter('error rate must be a float between 0 and 1')
+
+    return value
+
+
+@cli.command(help='Initialize a new empty bloom filter')
+@click.option(
+    '--estimate',
+    required=True,
+    type=int,
+    help='Expected number of passwords that will be added',
+)
+@click.option(
+    '--error-rate',
+    default=0.01,
+    show_default=True,
+    help='Bloom filter desired false positive ratio',
+    callback=validate_init_error_rate,
+)
+@click.confirmation_option(
+    prompt='Are you sure you want to clear any existing bloom filter?',
+)
+def init(estimate: int, error_rate: float) -> None:
+    """Initialize a new bloom filter (destroying any existing one).
+
+    It generally shouldn't be necessary to re-init a new bloom filter very
+    often with this command, only if the previous one was created with too low
+    of an estimate for number of passwords, or to change to a different false
+    positive rate. For choosing an estimate value, according to the ReBloom
+    documentation: "Performance will begin to degrade after adding more items
+    than this number. The actual degradation will depend on how far the limit
+    has been exceeded. Performance will degrade linearly as the number of
+    entries grow exponentially."
+    """
+    REDIS.delete(BREACHED_PASSWORDS_BF_KEY)
+
+    # BF.RESERVE {key} {error_rate} {size}
+    REDIS.execute_command(
+        'BF.RESERVE',
+        BREACHED_PASSWORDS_BF_KEY,
+        error_rate,
+        estimate,
+    )
+
+    click.echo(
+        'Initialized bloom filter with expected size of {:,} and false '
+        'positive rate of {}%'
+        .format(estimate, error_rate * 100)
+    )
+
+
+@cli.command(help='Add hashes from a file to the bloom filter')
+@click.argument('filename', type=click.Path(exists=True, dir_okay=False))
+def addhashes(filename: str) -> None:
+    """Add all hashes from a file to the bloom filter.
+
+    This uses the method of generating commands in Redis protocol and feeding
+    them into an instance of `redis-cli --pipe`, as recommended in
+    https://redis.io/topics/mass-insert
+    """
+    # make sure the key exists and is a bloom filter
+    try:
+        REDIS.execute_command('BF.DEBUG', BREACHED_PASSWORDS_BF_KEY)
+    except ResponseError:
+        click.echo('Bloom filter is not set up properly - run init first.')
+        raise click.Abort
+
+    # call wc to count the number of lines in the file for the progress bar
+    click.echo('Determining hash count...')
+    result = subprocess.run(['wc', '-l', filename], stdout=subprocess.PIPE)
+    line_count = int(result.stdout.split(b' ')[0])
+
+    progress_bar: Any = click.progressbar(length=line_count)
+    update_interval = 100_000
+
+    click.echo('Adding {:,} hashes to bloom filter...'.format(line_count))
+
+    redis_pipe = subprocess.Popen(
+        ['redis-cli', '-s', BREACHED_PASSWORDS_REDIS_SOCKET, '--pipe'],
+        stdin=subprocess.PIPE,
+        stdout=subprocess.DEVNULL,
+        encoding='utf-8',
+    )
+
+    for count, line in enumerate(open(filename), start=1):
+        hashval = line.strip().lower()
+
+        # the Pwned Passwords hash lists now have a frequency count for each
+        # hash, which is separated from the hash with a colon, so we need to
+        # handle that if it's present
+        hashval = hashval.split(':')[0]
+
+        command = generate_redis_protocol(
+            'BF.ADD', BREACHED_PASSWORDS_BF_KEY, hashval)
+        redis_pipe.stdin.write(command)
+
+        if count % update_interval == 0:
+            progress_bar.update(update_interval)
+
+    # call SAVE to update the RDB file
+    REDIS.save()
+
+    # manually finish the progress bar so it shows 100% and renders properly
+    progress_bar.finish()
+    progress_bar.render_progress()
+    progress_bar.render_finish()
+
+
+if __name__ == '__main__':
+    cli()
--- a/tildes/scripts/clean_private_data.py
+++ b/tildes/scripts/clean_private_data.py
@ -0,0 +1,124 @@
+"""Script for cleaning up private/deleted data.
+
+Other things that should probably be added here eventually:
+    - Delete individual votes on comments/topics after voting has been closed
+    - Delete which users tagged comments after tagging has been closed
+    - Delete old used invite codes (30 days after used?)
+"""
+
+from datetime import datetime, timedelta
+import logging
+
+from sqlalchemy.orm.session import Session
+
+from tildes.lib.database import get_session_from_config
+from tildes.models.comment import Comment
+from tildes.models.log import Log
+from tildes.models.topic import Topic, TopicVisit
+
+
+# sensitive data older than this should be removed
+RETENTION_PERIOD = timedelta(days=30)
+
+
+def clean_all_data(config_path: str) -> None:
+    """Clean all private/deleted data.
+
+    This should generally be the only function called in most cases, and will
+    initiate the full cleanup process.
+    """
+    db_session = get_session_from_config(config_path)
+
+    cleaner = DataCleaner(db_session, RETENTION_PERIOD)
+    cleaner.clean_all()
+
+
+class DataCleaner():
+    """Container class for all methods related to cleaning up old data."""
+
+    def __init__(
+            self,
+            db_session: Session,
+            retention_period: timedelta,
+    ) -> None:
+        """Create a new DataCleaner."""
+        self.db_session = db_session
+        self.retention_cutoff = datetime.now() - retention_period
+
+    def clean_all(self) -> None:
+        """Call all the cleanup functions."""
+        logging.info(
+            f'Cleaning up all data (retention cutoff {self.retention_cutoff})')
+
+        self.delete_old_log_entries()
+        self.delete_old_topic_visits()
+
+        self.clean_old_deleted_comments()
+        self.clean_old_deleted_topics()
+
+    def delete_old_log_entries(self) -> None:
+        """Delete all log entries older than the retention cutoff.
+
+        Note that this will also delete all entries from the child tables that
+        inherit from Log (LogTopics, etc.).
+        """
+        deleted = (
+            self.db_session.query(Log)
+            .filter(Log.event_time <= self.retention_cutoff)
+            .delete(synchronize_session=False)
+        )
+        self.db_session.commit()
+        logging.info(f'Deleted {deleted} old log entries.')
+
+    def delete_old_topic_visits(self) -> None:
+        """Delete all topic visits older than the retention cutoff."""
+        deleted = (
+            self.db_session.query(TopicVisit)
+            .filter(TopicVisit.visit_time <= self.retention_cutoff)
+            .delete(synchronize_session=False)
+        )
+        self.db_session.commit()
+        logging.info(f'Deleted {deleted} old topic visits.')
+
+    def clean_old_deleted_comments(self) -> None:
+        """Clean the data of old deleted comments.
+
+        Change the comment's author to the "unknown user" (id 0), and delete
+        its contents.
+        """
+        updated = (
+            self.db_session.query(Comment)
+            .filter(
+                Comment.deleted_time <= self.retention_cutoff)  # type: ignore
+            .update({
+                'user_id': 0,
+                'markdown': '',
+                'rendered_html': '',
+            }, synchronize_session=False)
+        )
+        self.db_session.commit()
+        logging.info(f'Cleaned {updated} old deleted comments.')
+
+    def clean_old_deleted_topics(self) -> None:
+        """Clean the data of old deleted topics.
+
+        Change the topic's author to the "unknown user" (id 0), and delete its
+        title, contents, tags, and metadata.
+        """
+        updated = (
+            self.db_session.query(Topic)
+            .filter(
+                Topic.deleted_time <= self.retention_cutoff)  # type: ignore
+            .update({
+                'user_id': 0,
+                'title': '',
+                'topic_type': 'TEXT',
+                'markdown': None,
+                'rendered_html': None,
+                'link': None,
+                'content_metadata': None,
+                '_tags': [],
+            }, synchronize_session=False)
+        )
+        self.db_session.commit()
+        logging.info(f'Cleaned {updated} old deleted topics.')
--- a/tildes/scripts/initialize_db.py
+++ b/tildes/scripts/initialize_db.py
@ -0,0 +1,81 @@
+"""Script for doing the initial setup of database tables."""
+
+import os
+import subprocess
+from typing import Optional
+
+from alembic import command
+from alembic.config import Config
+from sqlalchemy.engine import Connectable, Engine
+
+from tildes.lib.database import get_session_from_config
+from tildes.models import DatabaseModel
+from tildes.models.group import Group
+from tildes.models.log import Log
+from tildes.models.user import User
+
+
+def initialize_db(
+        config_path: str,
+        alembic_config_path: Optional[str] = None,
+) -> None:
+    """Load the app config and create the database tables."""
+    db_session = get_session_from_config(config_path)
+    engine = db_session.bind
+
+    create_tables(engine)
+
+    run_sql_scripts_in_dir('sql/init/', engine)
+
+    # if an Alembic config file wasn't specified, assume it's alembic.ini in
+    # the same directory
+    if not alembic_config_path:
+        path = os.path.split(config_path)[0]
+        alembic_config_path = os.path.join(path, 'alembic.ini')
+
+    # mark current Alembic revision in db so migrations start from this point
+    alembic_cfg = Config(alembic_config_path)
+    command.stamp(alembic_cfg, 'head')
+
+
+def create_tables(connectable: Connectable) -> None:
+    """Create the database tables."""
+    # tables to skip (due to inheritance or other need to create manually)
+    excluded_tables = Log.INHERITED_TABLES
+
+    tables = [
+        table for table in DatabaseModel.metadata.tables.values()
+        if table.name not in excluded_tables
+    ]
+    DatabaseModel.metadata.create_all(connectable, tables=tables)
+
+
+def run_sql_scripts_in_dir(path: str, engine: Engine) -> None:
+    """Run all sql scripts in a directory."""
+    for root, _, files in os.walk(path):
+        sql_files = [
+            filename for filename in files
+            if filename.endswith('.sql')
+        ]
+        for sql_file in sql_files:
+            subprocess.call([
+                'psql',
+                '-U', engine.url.username,
+                '-f', os.path.join(root, sql_file),
+                engine.url.database,
+            ])
+
+
+def insert_dev_data(config_path: str) -> None:
+    """Load the app config and insert some "starter" data for a dev version."""
+    session = get_session_from_config(config_path)
+
+    session.add_all([
+        User('TestUser', 'password'),
+        Group(
+            'testing',
+            'An automatically created group to use for testing purposes',
+        ),
+    ])
+
+    session.commit()
--- a/tildes/scripts/site-icons-spriter/css_template.jinja2
+++ b/tildes/scripts/site-icons-spriter/css_template.jinja2
@ -0,0 +1,22 @@
+{% for r, ratio in ratios.items() %}
+{% if ratio.ratio == 1.0 %}
+.topic-icon {
+  background-image: url('/images/{{ ratio.sprite_path }}?{{ hash }}');
+  background-size: 0 0;
+}
+{% else %}
+@media screen and (min-device-pixel-ratio: {{ ratio.ratio }}), screen and (min-resolution: {{ ratio.ratio }}dppx) {
+  .topic-icon {
+    background-image: url('/images/{{ ratio.sprite_path }}?{{ hash }}');
+  }
+}
+{% endif %}
+{% endfor %}
+
+{% for image in images %}
+.topic-icon-{{ image.label }} {
+  background-position: {{ image.x ~ ('px' if image.x) }} {{ image.y ~ ('px' if image.y) }};
+  background-size: {{ width }}px {{ height }}px;
+  border: 0;
+}
+{% endfor %}