#!/bin/bash

#
# update-tags
#
scriptname=update-tags
if ! MYTMP=$(mktemp -d -t $scriptname-XXXXXX)
then
            echo >&2
            echo >&2
            echo >&2 "Cannot create temporary directory."
            echo >&2
            exit 1
fi

cleanup() {
  status=$?
  if [ $status -ne 0 ]
  then
    echo "FAILED."
    if [ "$TAGVER" ]
    then
      git tag -d "$TAGVER"
    fi
    echo "To re-run manually:"
    echo "  git diff HEAD^ | ./packaging/update-tags -"
    echo "To undo commit:"
    echo "  git reset HEAD^"
  fi
  rm -rf "${MYTMP}"
  exit $status
}

# clean up if we get stopped by Crtl-C or forced logout or normal exit
trap cleanup INT
trap cleanup HUP
trap cleanup 0

set -e
if [ "$1" = "--debug" ]
then
  set -x
  shift
fi

if [ $# -lt 1 ]
then
  echo "Use only from .git/hooks/post-commit"
  exit 1
fi

if [ ! -x packaging/update-tags ]
then
  echo "Must be run from base directory"
  exit 1
fi

if [ "$1" = "-" ]
then
  from_cache=Y
  f=""
else
  from_cache=
  for f in "$@"
  do
    if [ ! -f "$f" ]
    then
      echo "$f: no such file"
      exit 1
    fi
  done

  git status --porcelain "$@" | grep "^?" | cut -c4- > $MYTMP/missing.lst

  while read missing
  do
     git update-index --add --cacheinfo \
          100644 e69de29bb2d1d6434b8b29ae775ad8c2e48c5391 $missing
  done < $MYTMP/missing.lst

  empty_tree=4b825dc642cb6eb9a060e54bf8d69288fbee4904
  git diff $empty_tree -- "$@" > $MYTMP/diff.full
  f=$MYTMP/diff.full

  while read missing
  do
     git update-index --force-remove $missing
  done < $MYTMP/missing.lst
fi

> $MYTMP/diff.lst sed -e "/^+++ b/{p;s:^+++ b/::;w $MYTMP/files.lst" -e "d;}" $f

#cat $MYTMP/diff.lst
#cat $MYTMP/files.lst

dirname="${0%/*}"
if [ "$dirname" = "$0" ]; then dirname="."; fi
source $dirname/packaging.functions

status=0
while read filename
do
  #echo Checking $filename
  case $filename in
    configure.ac|ChangeLog)
      mkdir -p $MYTMP/files
      git show HEAD:configure.ac > $MYTMP/files/configure.ac
      version=`get_configure_ac_version`
      case "$(match_version $version)" in
         prerelease|candidate|release)
           do_release=Y
         ;;
      esac
    ;;
    *)
      #echo "No checks found for $filename"
      :
    ;;
  esac
done < $MYTMP/files.lst

if [ "$do_release" ]
then
  echo "Tagging new release with:"
  echo "   git tag -s \"v$version\" -m \"Release version $version\""
  git tag -s "v$version" -m "Release version $version"
  TAGVER="v$version"

  splitver confmaj confmin conffix confsfx "$version"
  if [ ! "$confsfx" ]
  then
    echo "Incrementing version in configure.ac:"
    conffix=`expr $conffix + 1`
    sed -i -e "s/define(\[VERSION_FIX\], \[.*])/define([VERSION_FIX], [$conffix])/" configure.ac
  fi

  echo "Resetting suffix in configure.ac:"
  sed -i -e 's/define(\[VERSION_SUFFIX\], \[.*])/define([VERSION_SUFFIX], [_rolling])/' configure.ac
  sed -i -e 's:^PACKAGE_RPM_RELEASE=.*:PACKAGE_RPM_RELEASE="0.0.$(echo VERSION_SUFFIX | sed s/^_//)":' configure.ac

  echo "Committing new configure.ac:"
  git commit --no-verify -m "Post release $version" -- configure.ac
  echo ""
  echo "Verify, then:"
  echo "  git push origin"
  echo "  git push origin tag $TAGVER"
fi

exit $status