Git pre commit hook for running jslint (installed as /usr/bin/jsl)

pre-commit

#!/bin/sh
# based on sample pre-commit hook distributed with git
if git rev-parse --verify HEAD >/dev/null 2>&1
then
	against=HEAD
else
	# Initial commit: diff against an empty tree object
	against=4b825dc642cb6eb9a060e54bf8d69288fbee4904
fi

skipjscheck=$(git config hooks.skipjscheck)

if [ "$skipjscheck" != "true" ]; then
  for i in $(git diff-index --cached --full-index --name-only --diff-filter=ACMT -z $against); do
    if jsl --nologo --nofilelisting --nosummary --conf=$HOME/.jslrc $i 2>&1 | grep "syntax_error"; then
      echo "Error: Javascript files do not pass jsl error check"
      exit 1;
    else
      if jsl --nologo --nofilelisting --nosummary --conf=$HOME/.jslrc $i 2>&1 | grep "undeclared identifier"; then
        echo "Error: Undeclared javascript identifiers in $i"
        exit 1;
      else
        echo "Javascript files ok."
      fi
    fi
  done
fi
exec git diff-index --check --cached $against --