#!/bin/bash

. ./vars.sh.frag

if test ! -d $PKGDIR_REL; then
    abort 1 "Cannot find $PKGDIR_REL. Did you run ./new-package.sh before?"
fi

if test ! -f "$PKGDIR_REL/debian/changelog"; then
	abort 1 "Cannot find $PKGDIR_REL/debian/changelog. Did you run ./new-package.sh before?"
fi

if git grep --quiet FIXME -- "$PKGDIR_REL" :^"$PKGDIR_REL/debian/*.debcargo.hint" :^"$PKGDIR_REL/debian/changelog"; then
	abort 1 "FIXMEs remain in $PKGDIR_REL, fix and commit those first."
fi

git diff --quiet --cached || \
abort 1 "You have other pending changes to git, please complete it or stash it away and re-run this script."

git diff --quiet -- "$PKGDIR_REL" || \
abort 1 "Please git-add your changes to $PKGDIR_REL before running"

type dch >/dev/null || \
abort 1 "Install devscripts, we need to run dch."

RELBRANCH="pending-$PKGNAME"
git fetch origin --prune

git merge-base --is-ancestor origin/master HEAD || \
abort 1 "You are not synced with origin/master, please do so before running this script."

if [ "$RERELEASE" = 1 -o "$NOUPDATE" = 1 ]; then
	REALVER="$(get_existing_version "$PKGDIR")"
fi

if head -n1 "$PKGDIR/debian/changelog" | grep -qv UNRELEASED-FIXME-AUTOGENERATED-DEBCARGO; then
	if [ "$RERELEASE" = 1 ]; then
		run_debcargo
		( cd "$PKGDIR" && dch -a "No-op source-only re-upload for Debian Testing Migration." )
		# sometimes the copyright years need to be updated, try to do this automatically
		if git diff -- "$PKGDIR_REL/debian/copyright.debcargo.hint" | patch --no-backup-if-mismatch "$PKGDIR_REL/debian/copyright"; then
			git add "$PKGDIR_REL/debian/copyright.debcargo.hint" "$PKGDIR_REL/debian/copyright"
		else
			git diff -- "$PKGDIR_REL/debian/copyright.debcargo.hint"
			abort 1 \
			  "copyright file needs updating; apply the above diff to $PKGDIR_REL/debian/copyright" \
			  "then commit your changes, and run me again."
		fi
	else
		abort 0 \
		  "Package already released. If you want to do a source-only re-upload e.g. to" \
		  "hoop-jump through the Debian Testing migration requirements, set RERELEASE=1."
	fi
fi

if [ -e "$PKGDIR/debian/BLOCK" ]; then
	abort 1 "TODO items remain in $PKGDIR/debian/BLOCK, please deal with those"
fi

PREVBRANCH="$(git rev-parse --abbrev-ref HEAD)"
case "$PREVBRANCH" in
pending-$PKGNAME)	true;;
pending-*)	abort 1 "You are on a pending-release branch for a package other than $PKGNAME, $0 can only be run on another branch, like master";;
*)	if git rev-parse -q --verify "refs/heads/$RELBRANCH" >/dev/null || \
	   git rev-parse -q --verify "refs/remotes/origin/$RELBRANCH" >/dev/null; then
		git checkout "$RELBRANCH"
	else
		git checkout -b "$RELBRANCH"
	fi;;
esac

if head -n1 "$PKGDIR/debian/changelog" | grep -qv UNRELEASED-FIXME-AUTOGENERATED-DEBCARGO; then
	git checkout "$PREVBRANCH"
	abort 0 "Package already released on branch $RELBRANCH. If that was a mistake then run:" \
	  "    git branch -D $RELBRANCH" \
	  "And re-run this script ($0 $*). You might have to delete the remote branch too:" \
	  "    git push --delete origin $RELBRANCH"
fi

( cd "$PKGDIR"
sed -i -e s/UNRELEASED-FIXME-AUTOGENERATED-DEBCARGO/UNRELEASED/ debian/changelog
if test -z "$DISTRO"; then
    # To upload to other distro like experimental
    DISTRO=unstable
fi
dch -m -r -D $DISTRO ""
git add debian/changelog
git rm --ignore-unmatch debian/RFS
)

revert_git_changes() {
	git reset --merge
	git checkout -- "$PKGDIR/debian/changelog"
	git checkout -q -- "$PKGDIR/debian/RFS" || true
	git checkout "$PREVBRANCH"
	git branch -d "$RELBRANCH"
}

if ! run_debcargo --changelog-ready; then
	revert_git_changes
	abort 1 "Release attempt failed to run debcargo, probably the package needs updating (./update.sh $*)"
fi

if ! git diff --exit-code -- "$PKGDIR_REL"; then
	revert_git_changes
	abort 1 \
	  "Release attempt resulted in git diffs to $PKGDIR_REL, probably you need to update the package (./update.sh $*)." \
	  "Alternatively, set NOUPDATE=1 to override this requirement, but please have a good reason."
fi

if ! ( cd build && SOURCEONLY=1 ./build.sh "$CRATE" $VER ); then
	revert_git_changes
	abort 1 "Release attempt failed (see messages above), possible reasons are: " \
		"- build-dependencies not in Debian => release those first." \
		"- packaged version is out-of-date => run \`./update.sh $*\`"
fi

git commit -m "Release package $PKGNAME"

DEBVER=$(dpkg-parsechangelog -l $BUILDDIR/debian/changelog -SVersion)
DEBSRC=$(dpkg-parsechangelog -l $BUILDDIR/debian/changelog -SSource)
DEB_HOST_ARCH=$(dpkg-architecture -q DEB_HOST_ARCH)

if [ "$RERELEASE" = 1 ]; then

( cd build && dput "${DEBSRC}_${DEBVER}_source.changes" )
git push origin "$RELBRANCH"
git checkout master

cat <<eof
Source-only re-release of $CRATE uploaded. You need to perform the following steps:
eof

else

cat <<eof
Release of $CRATE ready as a source package in ${BUILDDIR#$PWD/}. You need to
perform the following steps:

Build the package if necessary, and upload
==========================================

If the source package is already in Debian and this version does not introduce
new binaries, then you can just go ahead and directly dput the source package.

  cd build && dput ${DEBSRC}_${DEBVER}_source.changes

For your reference, this source package builds $(grep ^Package build/${CRATE//_/-}/debian/control | wc -l) binary package(s):
$(sed -ne 's/^Package: //pg' build/hmac/debian/control | tr '\n' ',')

If this is a NEW source package or introduces NEW binary packages not already
in the Debian archive, you will need to build a binary package out of it. The
recommended way is to run something like:

  cd build && ./build.sh $CRATE $VER && dput ${DEBSRC}_${DEBVER}_${DEB_HOST_ARCH}.changes

This assumes you followed the "Build environment" instructions in README.rst,
for setting up a build environment for release.

If the build fails e.g. due to missing Build-Dependencies you should revert
what I did (see below) and package those missing Build-Dependencies first.

Push this pending-release branch
================================

After you have uploaded the package with dput(1), you should push $RELBRANCH so
that other people see it's been uploaded. Then, checkout another branch like
master to continue development on other packages.

  git push origin $RELBRANCH && git checkout master

eof

fi

cat >&2 <<eof
Merge the pending-release branch if/when ACCEPTED
=================================================

When it's ACCEPTED by the Debian FTP masters, you may then merge this branch
back into the master branch, delete it, and push these updates to origin.

  git checkout master && git merge $RELBRANCH && git branch -d $RELBRANCH
  git push origin master :$RELBRANCH

Delete this branch without merging if/when REJECTED
===================================================

If your upload is REJECTED, or if you cannot perform an upload in the first
place e.g. because you are not a Debian Developer, you should revert what I
just did. To do that, run:

  git checkout master && git branch -D $RELBRANCH

Then ask a Debian Developer to re-run me ($0 $*) on your behalf. Also, touch
and commit ${PKGDIR_REL}/debian/RFS so we can track these easier.
eof