#!/bin/bash
# Archive a git tag including submodules

if [ $# -eq 0 ]
  then
    echo "No arguments supplied"
    echo "Usage: $0 <prefix> <tag>"
    exit 0
fi

prefix=$1
tag=$2
tempdir=$(mktemp -d -t $prefix-XXXXXX)

set -e
set -C # noclobber

echo "> creating root archive"
# create root archive
git archive --verbose --prefix "$prefix-$tag/" --format "tar" --output "$tempdir/$prefix-$tag.tar" "$tag"

echo "> appending submodule archives"
# for each of git submodules append to the root archive
git submodule foreach --recursive "git archive --verbose --prefix=$prefix-$tag/\$displaypath/ --format tar --output $tempdir/$prefix-sub-\$sha1.tar HEAD"

exit 0

if [[ $(ls $tempdir/$prefix-sub-*.tar | wc -l) != 0  ]]; then
  # combine all archives into one tar
  echo "> combining all tars"
  for archive in $tempdir/$prefix-sub-*.tar; do
    tar --concatenate --file $tempdir/$prefix-$tag.tar $archive;
  done


  # remove sub tars
  echo "> removing all sub tars"
  rm -f $tempdir/$prefix-sub-*.tar
fi

# gzip the tar
echo "> gzipping final tar"
gzip --force --verbose $tempdir/$prefix-$tag.tar

echo "> moving output file to $OUTPUT_FILE"
mv $tempdir/$prefix-$tag.tar.gz .

echo "> git-archive-all done"