#! /bin/sh
# Display the SHA1 of the commit in which configure.ac was last modified.
# If it's not checked in yet, use the SHA1 of HEAD plus -dirty.

#

if [ ! -d .git ] ; then
  # if no .git directory, assume they're not using Git
  printf 'unknown commit'
elif git diff --quiet HEAD -- configure.ac ; then
  # configure.ac is not modified
  printf 'commit: %s\n' `git rev-parse --short HEAD -- configure.ac`
  printf 'branch: %s\n' `git rev-parse --abbrev-ref HEAD`
  printf 'date  : %s\n' `git log -1 --date=short --pretty=format:%cd`
else # configure.ac is modified
  printf 'commit: %s-dirty\n' `git rev-parse --short HEAD`
  printf 'branch: %s\n' `git rev-parse --abbrev-ref HEAD`
  printf 'date  : %s\n' `git log -1 --date=short --pretty=format:%cd`
fi