#!/bin/bash

module=$1
shift
version=$1
shift
modulebasedir=$1
shift
name="$*"

if test -z $module
then
  echo Please specify a module
  exit 1
fi

if test -z "$version"
then
  echo Please specify a version
  exit 1
fi

if test -z "$modulebasedir"
then
  echo "Please specify a module base dir (root of your checkout)"
  exit 1
fi

#if test -z "$name"
#then
#  echo Please specify a release name
#  exit 1
#fi

if test ! -d $modulebasedir/gstreamer
then
  echo $modulebasedir does not contain a "gstreamer" directory
  exit 1
fi

moduledir=$modulebasedir/$module

if test ! -e $moduledir/Makefile
then
  echo $moduledir/Makefile not found - run autogen.sh
  exit 1
fi

if test -e $moduledir/$module.doap
then
# FIXME: we could be smarter, e.g. insert a skeleton entry and spawn an editor
grep "$version" "$moduledir/$module.doap" >/dev/null || {
  echo "No mention of version $version in $module.doap file, please update first."
  exit 1;
}
fi

# check misc. environment variables we'll be using later
if test "x$EDITOR" = "x"; then
  echo "EDITOR environment variable not set."
  if [ -x /usr/bin/editor ] ; then
    echo "Using /usr/bin/editor instead"
    export EDITOR="/usr/bin/editor"
  else
    echo "No /usr/bin/editor either. Giving up."
    exit 1
  fi
fi

if test "x$REAL_NAME" = "x" ; then
  echo "REAL_NAME environment variable not set."
  export REAL_NAME=`git config user.name`
  if test "x$REAL_NAME" = "x" ; then
    echo "git config --get user.name not set either"
    exit 1
  else
    echo "Set REAL_NAME from git config --get user.name to: $REAL_NAME"
  fi
fi

if test "x$EMAIL_ADDRESS" = "x" ; then
  echo "EMAIL_ADDRESS environment variable not set."
  export EMAIL_ADDRESS=`git config user.email`
  if test "x$EMAIL_ADDRESS" = "x" ; then
    echo "git config --get user.email not set either"
    exit 1
  else
    echo "Set EMAIL_ADDRESS from git config --get user.email to: $EMAIL_ADDRESS"
  fi
fi


echo "Updating checkout"
pushd $moduledir > /dev/null 2>&1
git pull
popd

release=src/htdocs/releases/$module/$version
template=src/htdocs/releases/$module/template.xml
if test ! -e $template
then
  echo "No template $template !"
  exit 1
fi
if test ! -s $release.xml
then
  echo "Creating $release.xml"
  cp $template $release.xml
  case $version in
    *.0 ) sed -i -e 's/a new release/a new feature release/' $release.xml ;;
    * ) sed -i -e 's/a new release/a new bug-fix release/' $release.xml ;;
  esac
fi
echo "Updating $release.xml"
perl -i -p -e "s@<version></version>@<version>$version</version>@" $release.xml
if test -n "$name"; then
  perl -i -p -e "s@<name></name>@<name>$name</name>@" $release.xml
fi

# update Changelog
cd $moduledir
echo "Regenerating ChangeLog in $PWD"
# Check CHANGELOG_START tag exists
if ! git rev-parse CHANGELOG_START
then
    echo "No CHANGELOG_START tag in module"
    exit 1
fi
cd -

pushd $moduledir > /dev/null 2>&1
changelog=ChangeLog
python2 common/gen-changelog.py > $changelog
git add $changelog
popd

echo "Updating contributors"
changelog=$moduledir/ChangeLog
if test ! -e $changelog
then
  echo "No changelog $changelog found"
else
  bin/update-contributors $changelog $release.xml
fi
echo "Updating bugs"
if [ $module == "gst-validate" ]; then
  product="gst-devtools"
  sub_component="validate"
else
  product=$module
  sub_component=""
fi

python2 bin/bugzilla $product $version GStreamer $release.xml $sub_component

# update releases Makefile.am
makefileam=src/htdocs/releases/$module/Makefile.am
if grep "($version)" $makefileam > /dev/null 2>&1
then
  echo already changed $makefileam
else
  echo Updating $makefileam
  perl -i.bak -p -e "s@(releases =)@\$1 $version@" $makefileam
fi
# Mark for committing
git add $makefileam

# update configure.ac
configureac=$moduledir/configure.ac
echo "Press Enter to update configure.ac's version and libtool versioning."
read
$EDITOR $configureac || {
  echo "Error editing $configureac"
  exit 1
}

echo "Rebuilding to update version numbering"
pushd $moduledir > /dev/null 2>&1
make > out 2>&1 || ( echo "Build failed"; exit 1 )
make win32-update >> out 2>&1 || ( echo "Failed updating win32 config.h"; exit 1 )
popd

changelog=$moduledir/ChangeLog
if grep "=== release $version ===" $changelog > /dev/null 2>&1
then
  echo already changed $changelog
else
  echo Updating $changelog
  mv $changelog $changelog.bak
  echo "=== release $version ===" > $changelog
  echo >> $changelog
  echo "`date +%Y-%m-%d`  $REAL_NAME <$EMAIL_ADDRESS>" >> $changelog
  echo >> $changelog
  echo -e "\t* configure.ac:" >> $changelog
  if test -n "$name"; then
    echo -e "\t  releasing $version, \"$name\"" >> $changelog;
  else
    echo -e "\t  releasing $version" >> $changelog;
  fi;
  echo >> $changelog
  cat $changelog.bak >> $changelog
  pushd $moduledir > /dev/null 2>&1
  git add ChangeLog
  popd
fi

echo "Now press Enter to edit the next .xml file and update the list of features and API changes"
read

$EDITOR $release.xml || {
  echo "Error editing $release.xml"
  exit 1
}

# Mark for committing
git add $release.xml


echo "Building website"
make

# if the next line causes problems for you, you are not building the
# web site as per the README/HACKING file with different src/build dir
release=htdocs/releases/$module/$version
echo "Copying RELEASE"
cp $release $moduledir/RELEASE || {
  echo "Error copying $release $moduledir/RELEASE."
  echo "Maybe there was a problem creating $release , maybe because"
  echo "there is a syntax error in $release.xml or some other problem"
  echo "occured when rebuilding www/htdocs/releases/$module"
  exit 1
}

# FIXME: we should be able to generate most of the NEWS entries automatically
# just like we do for the RELEASE file.
echo "Press Enter to update NEWS with information from RELEASE"
read
$EDITOR $moduledir/NEWS $release

# we check for the inspect subdir, so this is skipped for e.g. gst-libav
if test -d $moduledir/docs/plugins/inspect
then
  echo "Updating plugin documentation files"
  pushd $moduledir/docs/plugins > /dev/null 2>&1
  make update
  make clean
  make
  popd
fi

echo "Rolling release tarballs"
pushd $moduledir > /dev/null 2>&1
make release > "/tmp/gst-make-release-$module-$version.log" 2>&1 || exit 1
popd
# not needed any more, make release does that now
# mv $moduledir/$module-$version.tar.* data/src/$module
tail -n 8 "/tmp/gst-make-release-$module-$version.log"

if [ -d $moduledir/docs ]; then
  echo "Press Enter to update docs on website (or enter 'no' to skip)"
  read do_commit
  if test "x$do_commit" != "xno"; then
    pushd $moduledir/docs > /dev/null 2>&1
    make upload > "/tmp/gst-make-upload-$module-$version.log" 2>&1
    popd
  fi
else
  echo "Not updating docs on website - no docs directory"
fi

if test -d $moduledir/po
then
  echo "Press Enter to commit updates to .po files (or enter 'no' to skip)"
  read do_commit
  if test "x$do_commit" != "xno"; then
    pushd $moduledir > /dev/null 2>&1
    git commit -m "Update .po files" po/*.po
    popd
  fi
fi

pushd $moduledir > /dev/null 2>&1
git diff --color > release.diff
echo "Press Enter to review the git diff"
less -R release.diff
popd

# print sha256sum and links (again, even though 'make release' does that too)
echo
echo "======================================================================="
echo
cat data/src/$module/$module-$version.tar.xz.sha256sum
echo
echo "http://gstreamer.freedesktop.org/src/$module/$module-$version.tar.xz"
echo
echo "======================================================================="
echo