#!/bin/bash
set -e
autoimport=
. tests/lib

t-dependencies NO-DGIT GDR quilt

t-tstunt-parsechangelog
t-tstunt debchange
t-setup-import gdr-convert-gbp-noarchive

t_gdr_xopts+=' --experimental-merge-resolution'

wreckage-before () {
	junkref=refs/debrebase/wreckage/junk
	git update-ref $junkref v2.1
}

wreckage-after () {
	test '' = "$(t-git-get-ref-exact $junkref)"
	git for-each-ref refs/debrebase/wreckage | egrep .
}

no-wreckage () {
	if git for-each-ref refs/debrebase/wreckage | egrep .; then
		fail wreckage
	fi
}

: ----- prepare the baseline -----

cd $p

t-gdr-prep-new-upstream 2.1
git tag v2.1 upstream

t-some-changes before
t-git-debrebase quick

: ===== early failure in walk =====

: ----- prepare other -----

git checkout -b other
t-some-changes other '' -other

git branch other-before-new-upstream

t-git-debrebase new-upstream 2.1
t-git-next-date

: ----- prepare master -----

git checkout master
t-git-debrebase new-upstream 2.1
t-git-next-date

git branch master-before-merge

: ----- make the merge -----

git merge --no-edit -s ours other

# we have to do a little dance to make this not a pseudomerge
t-git-next-date
dch -a 'Merge, only conflict was in debian/changelog'
t-dch-r-rune dch
git commit -a --amend --no-edit

wreckage-before

t-expect-fail F:'divergent anchors' \
t-git-debrebase

wreckage-after

: ===== late failure in apply =====

git checkout other
git reset --hard other-before-new-upstream

echo other-upstream-confict >>docs/README
git commit -m 'other-upstream-conflict' docs/README

t-git-debrebase quick

no-wreckage

: ----- make the merge -----

git checkout master
git reset --hard master-before-merge

t-merge-conflicted-stripping-conflict-markers other docs/README
t-git-debrebase stitch

: ----- expect failure -----

wreckage-before

t-expect-fail F:'docs/README' \
t-git-debrebase

wreckage-after

: ===== resolve the conflict =====

# omg

quilt_faff_before () {
	git checkout -b fix$1 debrebase/wreckage/merged-patchqueue
	QUILT_PATCHES=debian/patches quilt push -a
}
quilt_faff_after () {
	QUILT_PATCHES=debian/patches quilt refresh
	git add debian/patches
	git commit -m FIX
	git reset --hard
	git clean -xdff
	t-git-debrebase record-resolved-merge
	git checkout master
}

: ----- badly -----

quilt_faff_before 1
quilt_faff_after

t-expect-fail E:'upstream files are not the same' \
t-git-debrebase

t-git-debrebase scrap
no-wreckage

: ----- well -----

t-expect-fail F:'docs/README' \
t-git-debrebase
wreckage-after

quilt_faff_before 2
git checkout master docs/README
git reset docs/README
quilt_faff_after

t-git-debrebase

t-gdr-good laundered

t-ok