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#

: ${GDR_TEST_DEBUG=-D}
export GDR_TEST_DEBUG

t-tstunt debchange

t-git-debrebase () {
	local gdr=${DGIT_GITDEBREBASE_TEST-git-debrebase}
	: '
{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{'
	$gdr "--dgit=${DGIT_TEST-dgit}" $GDR_TEST_OPTS \
		$GDR_TEST_DEBUG $t_gdr_xopts "$@"
	: '}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}
'
}

t-gdr-good () {
	local state=$1
	local beforetag=$2 # say HEAD to skip this check
	# state should be one of
	#   laundered
	#   stitched
	#   pushed

	case $state in
	pushed*)
		t-gdr-made-patches
		;;
	esac

	git diff --quiet ${beforetag-t.before} -- ':.' ':!debian/patches'

	LC_MESSAGES=C t-git-debrebase status >../status.check
	case $state in
	laundered*)
		egrep '^  *branch is laundered' ../status.check
		;;
	stitched*|pushed*)
		egrep \
 '^  *branch contains furniture|^  *branch is unlaundered|^  *branch needs laundering' ../status.check
		egrep '^  stitched$' ../status.check
		;;
	esac

	t-gdr-good-analyse HEAD $state
}

t-gdr-good-analyse () {
	local head=$1
	local state=$2
	local wsfx=$3
	local etypes bwtip

	# etypes is either a type,
	# or   PseudoMerge-<more etypes>
	# or   AddPatches-<more etypes>

	case $state in
	laundered)
			etypes=Upstream
			bwtip=Y:`t-git-debrebase breakwater`
		;;
	stitched)	etypes=Pseudomerge-Upstream ;;
	pushed)		etypes=AddPatches-Pseudomerge-Upstream ;;
	pushed-interop)	etypes=Pseudomerge-AddPatchesInterop-Upstream ;;
	breakwater)	etypes=Packaging ;;
	*)		fail-unknown-state-$state ;;
	esac

	anal=../anal$wsfx
	t-git-debrebase analyse $head >$anal.check
	expect=`git rev-parse $head`
	exec <$anal.check
	local cid ctype info nparents
	while read cid ctype info; do
		: ===== $cid $ctype $info =====
		test $cid = $expect
		local cetype=${etypes%%-*}
		if [ "x$ctype" = "x$cetype" ]; then cetype=SAME; fi
		local parents="`git log -n1 --pretty=format:%P $cid`"
		expect="$parents"
		enparents=1
		: "$ctype/$cetype" "$parents"

		case "$ctype/$cetype" in
		Pseudomerge/SAME)			;;
		Packaging/SAME)				;;
		Packaging/Upstream)			;;
		MergedBreakwaters/Packaging)		;;
		MergedBreakwaters/Upstream)		;;
		AddPatches/SAME)			;;
		AddPatches/AddPatchesInterop)		;;
		Changelog/Packaging)			;;
		Changelog/Upstream)			;;
		Upstream/SAME)				;;
		Anchor/Upstream)			;;
		Anchor/Packaging)			;;
		*)
			fail "etypes=$etypes ctype=$ctype cetype=$cetype $cid"
			;;
		esac

		case "$ctype/$etypes" in
		Packaging/Upstream|\
		Changelog/Upstream)
			if [ "x$bwtip" != x ]; then
				test "$bwtip" = "Y:$cid"
				bwtip=''
			fi
		esac

		case "$cetype" in
		AddPatchesInterop)
			git log -n1 --pretty=format:%B \
			| grep '^\[git-debrebase[ :]'
			;;
		esac

		case "$ctype" in
		Pseudomerge)
			expect=${info#Contributor=}
			expect=${expect%% *}
			enparents=2
			git diff --quiet $expect..$cid
			etypes=${etypes#*-}

			: 'reject pointless pseudomerges'
			local overwritten=${parents/$expect/}
			overwritten=${overwritten// /}
			t-git-debrebase analyse $overwritten >$anal.overwr
			local ocid otype oinfo
			read <$anal.overwr ocid otype oinfo
			case "$otype" in
			Pseudomerge) test "x$info" != "x$oinfo" ;;
			esac
			;;
		Packaging)
			git diff --quiet $expect..$cid -- ':.' ':!debian' 
			git diff --quiet $expect..$cid -- ':debian/patches'
			etypes=Packaging
			;;
		AddPatches)
			git diff --quiet $expect..$cid -- \
				':.' ':!debian/patches'
			etypes=${etypes#*-}
			;;
		Changelog)
			git diff --quiet $expect..$cid -- \
				':.' ':!debian/changelog'
			etypes=Packaging
			;;
		Upstream/SAME)
			git diff --quiet $expect..$cid -- ':debian'
			;;
		MergedBreakwaters)
			enparents=2
			;;
		Anchor)
			break
			;;
		esac

		local cnparents=`printf "%s" "$parents" | wc -w`
		test $cnparents = $enparents

		local cndparents=`
	for f in $parents; do echo $f; done | t-sort -u | wc -w
				`
		test $cndparents = $cnparents

		case "$parents" in
		*"$expect"*)	;;
		*)		fail 'unexpected parent' ;;
		esac

		case "$ctype" in
		MergedBreakwaters)
			local f
			local parent_ix=0
			for f in $parents; do
				t-gdr-good-analyse $f breakwater \
					$wsfx-mp$parent_ix
				parent_ix=$(( $parent_ix + 1 ))
			done
			return
			;;
		esac		

	done
}

t-some-changes () {
	local token=$1
	local which=${2:-dum}
	local fsuffix=$3

	t-git-next-date

	case "$which" in
	*d*)
		echo >>debian/zorkmid$fsuffix "// debian $token"
		git add debian/zorkmid$fsuffix
		git commit -m "DEBIAN add zorkmid$fsuffix ($token)"
		;;
	esac

	case "$which" in
	*u*)
		echo >>src$fsuffix.c "// upstream $token"
		git add src$fsuffix.c
		git commit -m "UPSTREAM edit src$fsuffix.c ($token)"
		;;
	esac

	case "$which" in
	*m*)
		for f in debian/zorkmid$fsuffix src$fsuffix.c; do
			echo "// both! $token" >>$f
			git add $f
		done
		git commit -m "MIXED add both($fsuffix) ($token)"
		;;
	esac

	t-git-next-date
}

t-make-new-upstream-tarball () {
	local uv=$1
	git checkout make-upstream
	echo "upstream $uv" >>docs/README
	git commit -a -m "upstream $uv tarball"
	t-make-orig example $uv make-upstream
}

t-nmu-upload-1 () {
	# usage:
	#  v=<full version>
	#  nmu-upload-1 <nmubranch>
	#  gbp pq import or perhaps other similar things
	#  nmu-upload-2
	#  maybe make some dgit-covertible commits
	#  nmu-upload-3

	t-git-next-date
	nmubranch=$1
	git checkout -f -b $nmubranch
	t-git-debrebase
	t-git-debrebase convert-to-gbp
	t-git-next-date
	# now we are on a gbp patched-unapplied branch
}


t-nmu-upload-2 () {
	t-git-next-date
	t-dch-commit -v $v -m "nmu $nmubranch $v"
}

t-nmu-upload-3 () {
	t-dch-commit-r

	t-dgit -wgf build-source

	cd ..
	c=${p}_${v}_source.changes
	debsign -kBCD22CD83243B79D3DFAC33EA3DBCBC039B13D8A $c
	dput -c $tmp/dput.cf test-dummy $c

	t-archive-process-incoming sid
	t-git-next-date
	cd $p
	git checkout master
}

t-nmu-commit-an-upstream-change () {
	echo >>newsrc.c "// more upstream"
	git add newsrc.c
	git commit -m 'UPSTREAM NMU'
}

t-maintainer-commit-some-changes () {
	t-dch-commit -v$v -m "start $v"

	t-some-changes "maintainer $v"
	t-git-debrebase
	t-git-debrebase stitch

	git branch did.maintainer

	t-git-next-date
}

t-nmu-causes-ff-fail () {
	t-dgit fetch

	t-expect-fail E:'Not.*fast-forward' \
	git merge --ff-only dgit/dgit/sid

	t-expect-fail E:'-fdiverged.*refs/remotes/dgit/dgit/sid' \
	t-git-debrebase
}

t-nmu-reconciled-good () {
	local nmutree=$1

	: 'check that what we have is what is expected'

	git checkout -b compare.nmu origin/master~0
	git checkout $nmutree .
	git rm -rf debian/patches
	git commit -m 'rm patches nmu'

	git checkout -b compare.maintainer origin/master~0
	git checkout did.maintainer .
	git rm -rf --ignore-unmatch debian/patches
	git commit --allow-empty -m 'rm patches maintainer'

	git merge compare.nmu
	git diff --quiet master

	: 'check that dgit still likes it'

	git checkout master
	t-dgit -wgf quilt-fixup
}

t-gdr-prep-new-upstream () {
	uv=$1
	t-git-next-date
	git checkout make-upstream
	git reset --hard upstream
	t-make-new-upstream-tarball $uv
	git push . make-upstream:upstream
	git checkout master
	t-git-next-date
}

t-gdr-gbp-import-core () {
	p=example
	t-worktree 1.1

	cd example

	: 'fake up some kind of upstream'
	git checkout -b upstream quilt-tip
	rm -rf debian
	mkdir debian
	echo junk >debian/rules
	git add debian
	git commit -m "an upstream retcon ($0)"
	git tag v1.0
}

t-gdr-gbp-import-core-with-queue () {
	t-gdr-gbp-import-core

	: 'fake up that our quilt-tip was descended from upstream'
	git checkout quilt-tip
	git merge --no-edit -s ours upstream

	: 'fake up that our quilt-tip had the patch queue in it'
	git checkout patch-queue/quilt-tip
	gbp pq export
	git add debian/patches
	git commit -m "patch queue update ($0)"

	: 'make branch names more conventional'
	git branch -D master
	git branch -m quilt-tip master
}

t-gdr-made-patches () {
	git log -n1 --'pretty=format:%B' \
	| egrep '^\[git-debrebase'
}