Automatic Harp deployment on git push

post-merge.sh

#!/bin/sh
#
# Put in .git/hooks/post-merge on your remote (staging or production)
# and chmod +x on it.
# Combine with a GH webhook script that will `git pull`
# every time you push to a repo

# If you get errors with a webhook script, note you might
# have to change the owner of your repository (+ log file) to "www-data" or similar

if [ -z "$GIT_WORK_TREE" ]; then
    echo "GIT_WORK_TREE is not defined. This script should be run by a Git hook."
    exit 1
fi

# Set a location for your log
log=/var/www/yoursite/commit.log
harp=/usr/bin/harp

echo "Running post-merge script..."

# Output some debug info to our log file
{
	echo Arguments: "$@"
	echo "Current working directory:"
	pwd
	echo "Environment variables:"
	set
} > $log

# This deletes any file that shouldn't be here
# (ie if you made a modification on the live server, it'll be nuked)
GIT_DIR='.git'
umask 002 && git reset --hard

# Then we compile our Harp site to /dist/
# and append any error to the log file
$harp compile "$GIT_WORK_TREE" "$GIT_WORK_TREE"/dist/ 2>>$log

# Harp can't ignore file and compiles any Markdown file it finds,
# including the README… so delete that
rm "$GIT_WORK_TREE"/dist/README.html