#!/bin/sh
#
#   ///////////////////////
#  // Code auto-updater //
# ///////////////////////
#
# Update all site's codebases by pulling the latest changes to master branch,
# preserving any existing work in the process.

# NOTE: This script is designed to be run from whatever environment Git lives in
#

SOURCE=${1:-~/var/www/transfer/databases-all.txt}

if [ ! -f "$SOURCE" ]; then
        echo -e "\nSource file '$SOURCE' not found. Are you running this script in the right environment i.e. Windows vs Vagrant/Linux?\n\nUsage:\n\nbash code-update-all-master.sh /my/source/file.txt.\n"
        exit
fi

echo -e "\nUpdating all master branches for sites listed in '$SOURCE'\n";

while read -r site; do

        # Put the site information in a variable for easier access
        SITE=${site}

        echo -e "\n-------------------------------\n Updating code for $SITE\n"
        cd ~/Documents/repositories/"$SITE" || exit

        # Get the name of the current branch so we can put things back how they were after updating master
        BRANCH=$(git rev-parse --abbrev-ref HEAD)

        if [ "${BRANCH}" = 'master' ]; then
                echo "Already on master branch, pulling down latest tags, refs and changes..." && git fetch --tags && git pull --ff-only
        else
                # Save any non-committed work so we aren't being destructive, then checkout master
                echo -e "\nStashing any uncommitted changes...\n" && git stash
                echo -e "\nChecking out master branch...\n" && git checkout master
                echo -e "\nPulling down latest changes and tags...\n" && git fetch --tags && git pull --ff-only

                # Go back to the original branch and put the changes back
                echo -e "\nPutting things back how they were...\n" && git checkout "$BRANCH"
                echo -e "\nRe-applying those uncommitted changes, if any...\n" && git stash apply
        fi
done < "$SOURCE"

echo -e "\n-------------------------------\nScript complete!\n"