#!/bin/sh

setvar test_description = ''Revision traversal vs grafts and path limiter''

source ./test-lib.sh

test_expect_success setup '
	mkdir subdir &&
	echo >fileA fileA &&
	echo >subdir/fileB fileB &&
	git add fileA subdir/fileB &&
	git commit -a -m "Initial in one history." &&
	A0=$(git rev-parse --verify HEAD) &&

	echo >fileA fileA modified &&
	git commit -a -m "Second in one history." &&
	A1=$(git rev-parse --verify HEAD) &&

	echo >subdir/fileB fileB modified &&
	git commit -a -m "Third in one history." &&
	A2=$(git rev-parse --verify HEAD) &&

	rm -f .git/refs/heads/master .git/index &&

	echo >fileA fileA again &&
	echo >subdir/fileB fileB again &&
	git add fileA subdir/fileB &&
	git commit -a -m "Initial in alternate history." &&
	B0=$(git rev-parse --verify HEAD) &&

	echo >fileA fileA modified in alternate history &&
	git commit -a -m "Second in alternate history." &&
	B1=$(git rev-parse --verify HEAD) &&

	echo >subdir/fileB fileB modified in alternate history &&
	git commit -a -m "Third in alternate history." &&
	B2=$(git rev-parse --verify HEAD) &&
	: done
'

proc check {
	setvar type = "$1"
	shift

	setvar arg = ''
	setvar which = 'arg'
	rm -f test.expectfor a in @ARGV {
		if test "z$a" = z--
		{
			setvar which = 'expect'
			setvar child = ''
			continue
		}
		if test $which = arg
		{
			setvar arg = ""$arg$a ""
			continue
		}
		if test $type = basic
		{
			echo $a
		} else {
			if test "z$child" != z
			{
				echo "$child $a"
			}
			setvar child = "$a"
		}
	} >test.expect
	if test $type != basic && test "z$child" != z
	{
		echo >>test.expect $child>>test.expect $child
	}
	if test $type = basic
	{
		git rev-list $arg >test.actual
	} elif test $type = parents
	{
		git rev-list --parents $arg >test.actual
	} elif test $type = parents-raw
	{
		git rev-list --parents --pretty=raw $arg |
		sed -n -e 's/^commit //p' >test.actual
	}
	test_cmp test.expect test.actual
}

for type in basic parents parents-raw
{
	test_expect_success 'without grafts' "
		rm -f .git/info/grafts &&
		check $type $B2 -- $B2 $B1 $B0
	"

	test_expect_success 'with grafts' "
		echo '$B0 $A2' >.git/info/grafts &&
		check $type $B2 -- $B2 $B1 $B0 $A2 $A1 $A0
	"

	test_expect_success 'without grafts, with pathlimit' "
		rm -f .git/info/grafts &&
		check $type $B2 subdir -- $B2 $B0
	"

	test_expect_success 'with grafts, with pathlimit' "
		echo '$B0 $A2' >.git/info/grafts &&
		check $type $B2 subdir -- $B2 $B0 $A2 $A0
	"

}
test_done