#!/bin/bash

user="tianocore"

repo="edk2"

branch="master"

uri="https://github.com/${user}/${repo}"

api="${uri/github.com/api.github.com/repos}"

tar="${uri/github.com/codeload.github.com}/legacy.tar.gz"

if test $# -ge 1; then

  hash=$1

  short=$1

else

  hash=$(curl -s "${api}/git/refs/heads/${branch}" | grep '"sha"' | cut -d'"' -f4)

  if test "$hash" = ""; then

	echo "# failed to fetch $branch hash"

	exit 1

  fi

  short=$(echo $hash | sed -e 's/^\(.......\).*/\1/')

fi

if test $# = 2; then

  date=$2

else

  date=$(curl -s "${api}/git/commits/$hash" | awk '

	  /"committer"/	{ c=1 }

	  /"date"/	{ if (c) { print } }

  ' | cut -d'"' -f4)

  date="${date%T*}"

  date="${date//-/}"

fi

name="${repo}-${date}-${short}.tar.xz"

if test -f "$name"; then

	echo "# exists: $name"

	exit 1

fi

echo

echo "# specfile update: version $date, release $short"

sed -i.old \

        -e "s/\(%global edk2_date[ \t]\+\)\(.*\)/\1$date/" \

        -e "s/\(%global edk2_githash[ \t]\+\)\(.*\)/\1$short/" \

        edk2.spec

diff -u edk2.spec.old edk2.spec

echo

echo "# cleanup ..."

rm -vf ${repo}-*.tar*

echo "# fetching $name ..."

curl "$tar/$hash" | zcat | xz -9e > "$name"

exit 0