#!/bin/sh

test_description='test describe

                       B
        .--------------o----o----o----x
       /                   /    /
 o----o----o----o----o----.    /
       \        A    c        /
        .------------o---o---o
                     D   e
'
. ./test-lib.sh

check_describe () {
	expect="$1"
	shift
	R=$(git describe "$@" 2>err.actual)
	S=$?
	cat err.actual >&3
	test_expect_success "describe $*" '
	test $S = 0 &&
	case "$R" in
	$expect)	echo happy ;;
	*)	echo "Oops - $R is not $expect";
		false ;;
	esac
	'
}

test_expect_success setup '

	test_tick &&
	echo one >file && git add file && git-commit -m initial &&
	one=$(git rev-parse HEAD) &&

	test_tick &&
	echo two >file && git add file && git-commit -m second &&
	two=$(git rev-parse HEAD) &&

	test_tick &&
	echo three >file && git add file && git-commit -m third &&

	test_tick &&
	echo A >file && git add file && git-commit -m A &&
	test_tick &&
	git-tag -a -m A A &&

	test_tick &&
	echo c >file && git add file && git-commit -m c &&
	test_tick &&
	git-tag c &&

	git reset --hard $two &&
	test_tick &&
	echo B >side && git add side && git-commit -m B &&
	test_tick &&
	git-tag -a -m B B &&

	test_tick &&
	git-merge -m Merged c &&
	merged=$(git rev-parse HEAD) &&

	git reset --hard $two &&
	test_tick &&
	echo D >another && git add another && git-commit -m D &&
	test_tick &&
	git-tag -a -m D D &&

	test_tick &&
	echo DD >another && git commit -a -m another &&

	test_tick &&
	git-tag e &&

	test_tick &&
	echo DDD >another && git commit -a -m "yet another" &&

	test_tick &&
	git-merge -m Merged $merged &&

	test_tick &&
	echo X >file && echo X >side && git add file side &&
	git-commit -m x

'

check_describe A-* HEAD
check_describe A-* HEAD^
check_describe D-* HEAD^^
check_describe A-* HEAD^^2
check_describe B HEAD^^2^

check_describe A-* --tags HEAD
check_describe A-* --tags HEAD^
check_describe D-* --tags HEAD^^
check_describe A-* --tags HEAD^^2
check_describe B --tags HEAD^^2^

check_describe B-0-* --long HEAD^^2^

test_expect_success 'rename tag A to Q locally' '
	mv .git/refs/tags/A .git/refs/tags/Q
'
cat - >err.expect <<EOF
warning: tag 'A' is really 'Q' here
EOF
check_describe A-* HEAD
test_expect_success 'warning was displayed for Q' '
	git diff err.expect err.actual
'
test_expect_success 'rename tag Q back to A' '
	mv .git/refs/tags/Q .git/refs/tags/A
'

test_expect_success 'pack tag refs' 'git pack-refs'
check_describe A-* HEAD

test_done