#!/bin/sh

##### Configure These Vars: #####

USER="git"
HOST="labs.anyclip.com"
REPOS="/home/$USER"
POSTCMD="$REPOS/updatewebinterface.sh"

#################################


# Check environment
if [ "$1" == "" ]; then
	echo "The first argument of this script must be the description of the git repository."
	exit 1
fi
if [ ! -d ".git" ]; then
	echo "The current directory is not a git repository."
	exit 1
fi

# Initialize constants
repository="`pwd | xargs -0 basename | tr -d ' '`"
connection="$USER@$HOST"
hash="`echo $REPOS $repository $connection $(date +%s%N) | md5sum | cut -d ' ' -f 1`"
options="-o ControlMaster=auto -o ControlPath=./.sshcontrolmaster-$hash"
gitsshpath="./.gitssh-$hash"

# Create git ssh stub to use our options
echo -n "[*] Creating git ssh wrapper script..."
(echo '#!/bin/sh' > $gitsshpath && 
echo -n 'exec ssh ' >> $gitsshpath && 
echo -n "$options " >> $gitsshpath && 
echo '"$@"' >> $gitsshpath && 
chmod +x $gitsshpath) || { echo "failure!"; exit 1; }
echo "success."
export GIT_SSH="$gitsshpath"

# Setup control master
echo -n "[*] Connecting to server..."
ssh $options -fN $connection || { echo "failure!"; exit 1; }
echo "success."

# Create bare repo on server
echo -n "[*] Creating bare remote repository..."
ssh $options $connection "\
	cd \"$REPOS\" && \
	mkdir \"$repository\" &&\
	cd \"$repository\" &&\
	git init --bare &&\
	echo \"$1\" > description &&\
	mv hooks/post-update.sample hooks/post-update &&\
	chmod +x hooks/post-update;" > /dev/null 2>&1 || { echo "failure!"; exit 1; }
echo "success."

# Add configuration for remote repo to local repo
echo -n "[*] Setting up local configuration..."
echo "[remote \"origin\"]
        url = $connection:$REPOS/$repository
        fetch = +refs/heads/*:refs/remotes/origin/*
[branch \"master\"]
        remote = origin
        merge = refs/heads/master" >> .git/config || { echo "failure!"; exit 1; }
echo "success."

# Push local repo to remote repo
echo -n "[*] Uploading repository..."
git push --all > /dev/null 2>&1 || { echo "failure!"; exit 1; }
echo "success."

# Run the post command if there is one
if [ "$POSTCMD" != "" ]; then
	echo -n "[*] Running post-command..."
	ssh $options $connection "$POSTCMD" || { echo "failure!"; exit 1; }
	echo "success."
fi

# Kill the ssh control master, delete gitssh wrapper
echo -n "[*] Cleaning up..."
ssh $options -O exit $connection 2> /dev/null || echo "\n\tClean up failed: could not kill ssh control master."
rm $gitsshpath > /dev/null || echo "\n\tClean up failed: could not delete git ssh wrapper."
echo "success."

echo "Complete!"