#! /bin/bash

reldir=$HOME/linux-libre/releases

key=474402C8C582DAFBE389C427BCB7CF877E7D47A7

success=:
for rel
do

rup=$(echo "$rel" | sed 's,-gnu[0-9]*$,,')
cbr=$(echo "$rup" | sed 's,\(\.\|-rc\)[0-9]*$,,')

if test -d $reldir/$rel; then
  echo $reldir/$rel exists >&2
  continue
fi

if test -h $reldir/LATEST-$cbr.0; then
  prev0=$(readlink $reldir/LATEST-$cbr.0)
  prevn=$(readlink $reldir/LATEST-$cbr.N)
elif test -h $reldir/LATEST-$rup.N; then
  cbr=$rup
  prev0=$(readlink $reldir/LATEST-$cbr.0)
  prevn=$(readlink $reldir/LATEST-$cbr.N)
else
  echo Neither $reldir/LATEST-$cbr.0 nor $reldir/LATEST-$rup.N exist >&2
  exit 1
fi

for up in linus stable; do
  git rev-parse --verify -q $up/v$rup && break
done

git verify-tag $up/v$rup &&

{ test -d scripts/v$rel ||
  git worktree add --detach scripts/v$rel scripts/$cbr
} &&

git worktree add --detach sources/v$rel $up/v$rup &&

git worktree add --detach logs/v$rel public/logs/v$prevn &&

(cd logs/v$rel && git rm -f linux-*) &&

(
  cd sources/v$rel &&
  ../../scripts/v$rel/deblob-$cbr >& ../../logs/v$rel/linux-libre-$rel.log &&
  git commit -m "GNU Linux-libre v$rel incremental" -a &&
  git tag incr/v$rel
) &&

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

(
  cd sources/v$rel &&
  git reset --soft -q public/sources/v$prevn &&
  git commit --amend --reset-author -S$key \
      -m "GNU Linux-libre $rel" &&
  git tag -m "GNU Linux-libre $rel" -s -u $key sources/v$rel &&

  git reset --hard incr/v$rel^ &&
  { git merge --no-commit incr/v$prevn || :; } &&
  git diff incr/v$rel > ../../linux-libre-$rel.patckT &&
  mv -v ../../linux-libre-$rel.patckT ../../linux-libre-$rel.patck
 ) &&

git archive --format tar --prefix=linux-$rup/ -o linux-libre-$rel.tar sources/v$rel &&
gpg --armor --detach-sign linux-libre-$rel.tar &&
mv linux-libre-$rel.tar.asc logs/v$rel/linux-libre-$rel.tar.sign &&

for f in linux-libre-; do
  if cmp logs/v$rel/$f$rel.log $reldir/$prevn/$f$prevn.log; then
    ln -vf $reldir/$prevn/$f$prevn.log logs/v$rel/$f$rel.log &&
    ln -vf $reldir/$prevn/$f$prevn.log.sign logs/v$rel/$f$rel.log.sign
  else
    gpg --armor --detach-sign logs/v$rel/$f$rel.log &&
    mv -v logs/v$rel/$f$rel.log.asc logs/v$rel/$f$rel.log.sign
  fi
done &&

(
  cd logs/v$rel &&
  git add linux* &&
  git commit --amend --reset-author -S$key -m "GNU Linux-libre $rel logs" &&
  git tag -m "GNU Linux-libre $rel logs" -s -u $key logs/v$rel
) &&

git diff --src-prefix=linux-libre-$prev0/ --dst-prefix=linux-libre-$rel/ \
  public/sources/v$prev0 sources/v$rel -- > patch-$prev0-$rel &&

if test "$prev0" != "$prevn"; then
  git diff --src-prefix=linux-libre-$prevn/ --dst-prefix=linux-libre-$rel/ \
    public/sources/v$prevn sources/v$rel -- > patch-$prevn-$rel
fi &&

{ scripts/v$rel/deblob-check --use-awk linux-libre-$rel.tar ||
    scripts/v$rel/deblob-check --use-awk -C linux-libre-$rel.tar \
      > linux-libre-$rel.check ||
    { success=false; continue; }; }

done &&

$success