#! /bin/bash

# Copyright 2021 Alexandre Oliva <lxoliva@fsfla.org>
#
# This program is part of GNU Linux-libre, a GNU project that
# publishes scripts to clean up Linux so as to make it suitable for
# use in the GNU Project and in Free System Distributions.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
# USA


# This is a one-shot script that we used when transitioning to
# git-based releases.  IIRC it double-checked scripts and tarballs
# against the preexisting git repo from Jason Self, and added our own
# signatures.


archive=$HOME/linux-libre/releases # $(ls -d /media/p0?/linux-libre-releases)
key=474402C8C582DAFBE389C427BCB7CF877E7D47A7
pubase=public/logs/v5.6-gnu
tmp=. # /tmp/prep

success=:

for tag
do
  rel=${tag##jxself/v}
  rup=${rel%%-[gl][ni][ub]*}

  git rev-parse --verify -q incr/v$rel &&
  git rev-parse --verify -q public/sources/v$rel &&
  git rev-parse --verify -q public/logs/v$rel &&
  continue

 (if test ! -d $archive/$rel; then
    echo $archive/$rel/ does not exist >& 2
    exit 1
  fi &&

  tb=$archive/$rel/linux-libre-$rel &&
  tar=$tb.tar.bz2 &&
  trd=linux-$rup &&

  tagid=$(git rev-parse $tag) &&
  noteid=$(echo $tagid | sed 's,^..,&/,') &&
  git rev-parse --verify -q stable/v$rup &&

  DATE=$(git cat-file -p $tagid |
             gawk '/^(author|tagger)/ {
                        print strftime(PROCINFO["strftime"], $(NF-1))
                   }') &&
  export GIT_COMMITTER_DATE=$DATE GIT_AUTHOR_DATE=$DATE &&

  test -f $tb.log &&
  test -f notes/logs/$noteid &&
  test -f notes/tars/$noteid &&
  diff -b $tb.log notes/logs/$noteid &&

  git archive --format tar --prefix=linux-libre-$rel/ $tag |
  gpg -q --verify notes/tars/$noteid - &&

  git worktree add --detach log-$rel $pubase &&

  cd log-$rel &&
  git rm -f linux* &&
  cp -p $tb.log $tb.tar.sign . &&
  cp ../notes/tars/$noteid $(basename $tb).git.tar.sign &&
  git add linux* &&
  git commit --amend --reset-author -S$key -m "GNU Linux-libre $rel logs" &&
  cd .. &&

  gpg -q --verify $tar.sign &&

  git worktree add --detach $tmp/$trd master &&
  rm -f $tmp/$trd/* &&

 (cd $tmp/$trd &&
  git reset -q $tag &&
  tar -xf $tar -C .. &&

  if git status -su | grep .; then
    exit 1
  fi &&

  git reset --soft stable/v$rup &&
  git commit -m "GNU Linux-libre $rel incremental" &&

  git tag -f incr/v$rel &&

  git fetch file://$(pwd) refs/tags/$tag:refs/tags/public/sources/v$rel
 ) &&

  git worktree remove $tmp/$trd &&

  cd log-$rel &&
  git tag -f -m "GNU Linux-libre $rel logs" -s -u $key public/logs/v$rel &&
  cd .. &&
  git worktree remove log-$rel

 ) || { echo $tag failed >&2; success=false; }
done

$success