Exports *.bmml files to PNGs when staged for git commit

pre-commit

#!/bin/sh

# .git/hooks/pre-commit
#
# NEEDS registered version of Balsamiq Mockups (mandatory for PNG export)
#
# Exports *.bmml files to PNGs, but only for new or modified ones (files in stage area).
# This should be installed as .git/hooks/pre-commit in your local repository (with +x flag).
# As git hook it ensures that your new/modified (and staged) files will be exported before commit
# your changes to the repository automatically.
#
# INSTALL
#
# $ cd /to/your/repo/with/mockups
# $ curl https://gist.github.com/raw/4603721/pre-commit -o .git/hooks/pre-commit
# $ chmod +x .git/hooks/pre-commit
#
# USAGE
#
# * Edit/create your mockups
# * Prepare commit and `git add` the files you want to commit (stage them!)
# * Commit -> the hook is triggered and creates the PNGs

# for OSX only:
mockupsApp="/Applications/Balsamiq Mockups.app/Contents/MacOS/Balsamiq Mockups"

cdir=`pwd`
files=`git diff HEAD --cached --name-only | awk '$0~/bmml/{print}' | sed -e 's/ /%20/g'`

for f in $files; do
  ifile=`echo ${cdir}/${f} | sed -e 's/%20/\\\ /g'`
  ofile=`echo $ifile | sed -e 's/bmml/png/'`
  echo "Converting"
  echo "     $ifile"
  echo "  to $ofile"
  `"$mockupsApp" export "$ifile" "$ofile"`
done

# Hm, you should not need to use this with a proper BM app setup ...
# exit 0