#!/bin/bash
 
# Adapted from a puppet pre-commit hook at:
# http://blog.snijders-it.nl/2011/12/example-puppet-27-git-pre-commit-script.html
#
# install this as .git/hooks/pre-commit to check DNS zone files
# for errors before committing changes.
# adapted more by skvidal to make it work for signed zones and oddball zone names
 
rc=0
 
[ "$SKIP_PRECOMMIT_HOOK" = 1 ] && exit 0
 
# Make sure we're at top level of repository.
gittld=$(git rev-parse --show-toplevel)
cd $gittld
 
trap 'rm -rf $tmpdir $tmpfile1' EXIT INT HUP
tmpdir=$(mktemp -d /var/tmp/git-precommitXXXXXX)
tmpfile1=$(mktemp /var/tmp/git-precommit-errXXXXXX)
 
echo "$(basename $0): Validating changes."
 
# Here we copy files out of the index into a temporary directory. This
# protects us from a the situation in which we have staged an invalid
# zone file using ``git add`` but corrected the changes in the
# working directory. If we checked the files "in place", we would
# fail to detect the errors.
 
git diff-index --cached --name-only HEAD | 
grep -E 'built|master' | 
git checkout-index --stdin --prefix=$tmpdir/
 
pushd $tmpdir >> /dev/null
$gittld/check-domains >> $tmpfile1
popd $tmpdir >> /dev/null
 
if [ -s "$tmpfile1" ]; then
echo
echo Error: Zone file problem:
echo ----------------------------
cat $tmpfile1
echo ----------------------------
echo
 
rc=1
fi
 
exit $rc