Add a release script

Creating releases by hand is error-prone, which is why I already messed
up several time (no big deal, just some comment or annotations with the
wrong date or version number).
I already had a look at some automation tools, mostly cargo-release, but
it failed to convince me.

release.sh

@@ -0,0 +1,136 @@
+#!/usr/bin/env bash
+#
+# This script creates a new release and is therefore not meant to be
+# used by anyone but the project manager. It will therefore remain
+# undocumented and may assume some specific environment.
+
+abort_release()
+{
+    echo "Aborting."
+    exit 1
+}
+
+display_crate_version()
+{
+    local crate_name="$1"
+    local crate_version
+
+    crate_version=$(grep "^version" "${crate_name}/Cargo.toml" | cut -d '"' -f2)
+    echo "Current version for crate ${crate_name}: ${crate_version}"
+}
+
+update_crate_version()
+{
+    local crate_name="$1"
+    local new_version="$2"
+
+    sed -i "s/^version = .*/version = \"${new_version}\"/" "${crate_name}/Cargo.toml"
+}
+
+display_man_date()
+{
+    local man_name="$1"
+    local man_date
+
+    man_date=$(grep ".Dd" "man/en/${man_name}" | sed "s/\.Dd //")
+    echo "Current date for ${man_name}: ${man_date}"
+}
+
+update_man_date()
+{
+    local man_name="$1"
+    local new_date="$2"
+
+    sed -i "s/\.Dd .*/\.Dd ${new_date}/" "man/en/${man_name}"
+}
+
+check_working_directory()
+{
+    local status
+
+    status=$(git status --untracked-files="no" --porcelain="2")
+    if [[ "$status" != "" ]]; then
+        echo "Unable to create a new release while the working directory is not clean."
+        abort_release
+    fi
+}
+
+commit_new_version()
+{
+    local new_version="$1"
+
+    git add --update
+    git commit -m "ACMEd v${new_version}"
+    git tag -m "ACMEd v${new_version}" "v${new_version}"
+
+    echo
+    echo "Version ${new_version} has been committed and tagged."
+    echo "If everything is correct, you can publish if using:"
+    echo "  git push"
+    echo "  git push origin v${new_version}"
+}
+
+release_new_version()
+{
+    local new_version="$1"
+    local current_date="$2"
+    local confirm_git_diff
+
+    update_crate_version "acme_common" "${new_version}"
+    update_crate_version "acmed" "${new_version}"
+    update_crate_version "tacd" "${new_version}"
+
+    update_man_date "acmed.8" "${current_date}"
+    update_man_date "acmed.toml.5" "${current_date}"
+    update_man_date "tacd.8" "${current_date}"
+
+    git diff
+
+    echo
+    echo -n "Does everything seems ok? [y|N] "
+    read -r confirm_git_diff
+
+    case "${confirm_git_diff}" in
+        y|Y) commit_new_version "${new_version}";;
+        *)
+            git restore "."
+            abort_release
+            ;;
+    esac
+}
+
+main()
+{
+    local new_version
+    local confirm_release
+
+    check_working_directory
+
+    display_crate_version "acme_common"
+    display_crate_version "acmed"
+    display_crate_version "tacd"
+
+    echo
+    display_man_date "acmed.8"
+    display_man_date "acmed.toml.5"
+    display_man_date "tacd.8"
+
+    echo
+    echo -n "Enter the new version: "
+    read -r new_version
+
+    export LC_TIME="en_US.UTF-8"
+    current_date=$(date "+%b %d, %Y")
+
+    echo
+    echo "You are about to release version ${new_version} on ${current_date}"
+    echo -n "Are you sure? [y/N] "
+    read -r confirm_release
+
+    case "${confirm_release}" in
+        y|Y) release_new_version "${new_version}" "${current_date}";;
+        *) abort_release;;
+    esac
+}
+
+main