From dd8062ad62274c509515e8ef6e70175984fa7a0b Mon Sep 17 00:00:00 2001
From: Drew Short <warrick@sothr.com>
Date: Sun, 13 Sep 2015 15:21:11 -0500
Subject: [PATCH] Working on making a smarter updating script

---
 scripts/.update_dotfiles.sh | 38 ++++++++++++++++++++++++++++++++-----
 1 file changed, 33 insertions(+), 5 deletions(-)

diff --git a/scripts/.update_dotfiles.sh b/scripts/.update_dotfiles.sh
index 1cbe53a..8ec8034 100755
--- a/scripts/.update_dotfiles.sh
+++ b/scripts/.update_dotfiles.sh
@@ -1,6 +1,34 @@
 #!/usr/bin/env sh
-echo 'Updating dotfiles'
-cd @GIT_DIR@
-git checkout master
-git pull
-git submodule update
+
+# Update the status of the origin
+git remote update origin
+
+# Check if we need to update at all
+# Kindly borrowed from http://stackoverflow.com/questions/3258243/git-check-if-pull-needed
+LOCAL=$(git rev-parse @)
+REMOTE=$(git rev-parse @{u})
+BASE=$(git merge-base @ @{u})
+
+# All good, no need to update
+if [ $LOCAL = $REMOTE ]; then
+    echo "Up-to-date"
+    exit 0
+# Time to update to the remote branch
+elif [ $LOCAL = $BASE ]; then
+    echo "Need to pull"
+    echo 'Updating dotfiles'
+    opwd=$PWD
+    cd @GIT_DIR@
+    git checkout master
+    git pull
+    git submodule update
+    cd $owpd
+# Local changes exist, we need to push these before we can cleanly update
+elif [ $REMOTE = $BASE ]; then
+    echo "Local changes, need to push before updating."
+    exit 1
+# Divereged branches, this will need a manual cleanup to fix
+else
+    echo "Error: Diverged Branches. Resolve Manually"
+    exit 1
+fi