#!/bin/sh
#
# Copyright (C) 2006 Martin Waitz <tali@admingilde.org>
#

test_description='test clone --reference'
. ./test-lib.sh

base_dir=`pwd`

U=$base_dir/UPLOAD_LOG

test_expect_success 'preparing first repository' \
'test_create_repo A && cd A &&
echo first > file1 &&
git add file1 &&
git commit -m initial'

cd "$base_dir"

test_expect_success 'preparing second repository' \
'git clone A B && cd B &&
echo second > file2 &&
git add file2 &&
git commit -m addition &&
git repack -a -d &&
git prune'

cd "$base_dir"

test_expect_success 'cloning with reference (-l -s)' \
'git clone -l -s --reference B A C'

cd "$base_dir"

test_expect_success 'existence of info/alternates' \
'test_line_count = 2 C/.git/objects/info/alternates'

cd "$base_dir"

test_expect_success 'pulling from reference' \
'cd C &&
git pull ../B master'

cd "$base_dir"

test_expect_success 'that reference gets used' \
'cd C &&
echo "0 objects, 0 kilobytes" > expected &&
git count-objects > current &&
test_cmp expected current'

cd "$base_dir"

rm -f "$U.D"

test_expect_success 'cloning with reference (no -l -s)' '
	GIT_TRACE_PACKET=$U.D git clone --reference B "file://$(pwd)/A" D
'

test_expect_success 'fetched no objects' '
	test -s "$U.D" &&
	! grep " want" "$U.D"
'

cd "$base_dir"

test_expect_success 'existence of info/alternates' \
'test_line_count = 1 D/.git/objects/info/alternates'

cd "$base_dir"

test_expect_success 'pulling from reference' \
'cd D && git pull ../B master'

cd "$base_dir"

test_expect_success 'that reference gets used' \
'cd D && echo "0 objects, 0 kilobytes" > expected &&
git count-objects > current &&
test_cmp expected current'

cd "$base_dir"

test_expect_success 'updating origin' \
'cd A &&
echo third > file3 &&
git add file3 &&
git commit -m update &&
git repack -a -d &&
git prune'

cd "$base_dir"

test_expect_success 'pulling changes from origin' \
'cd C &&
git pull origin'

cd "$base_dir"

# the 2 local objects are commit and tree from the merge
test_expect_success 'that alternate to origin gets used' \
'cd C &&
echo "2 objects" > expected &&
git count-objects | cut -d, -f1 > current &&
test_cmp expected current'

cd "$base_dir"

test_expect_success 'pulling changes from origin' \
'cd D &&
git pull origin'

cd "$base_dir"

# the 5 local objects are expected; file3 blob, commit in A to add it
# and its tree, and 2 are our tree and the merge commit.
test_expect_success 'check objects expected to exist locally' \
'cd D &&
echo "5 objects" > expected &&
git count-objects | cut -d, -f1 > current &&
test_cmp expected current'

cd "$base_dir"

test_expect_success 'preparing alternate repository #1' \
'test_create_repo F && cd F &&
echo first > file1 &&
git add file1 &&
git commit -m initial'

cd "$base_dir"

test_expect_success 'cloning alternate repo #2 and adding changes to repo #1' \
'git clone F G && cd F &&
echo second > file2 &&
git add file2 &&
git commit -m addition'

cd "$base_dir"

test_expect_success 'cloning alternate repo #1, using #2 as reference' \
'git clone --reference G F H'

cd "$base_dir"

test_expect_success 'cloning with reference being subset of source (-l -s)' \
'git clone -l -s --reference A B E'

cd "$base_dir"

test_expect_success 'clone with reference from a tagged repository' '
	(
		cd A && git tag -a -m 'tagged' HEAD
	) &&
	git clone --reference=A A I
'

test_expect_success 'prepare branched repository' '
	git clone A J &&
	(
		cd J &&
		git checkout -b other master^ &&
		echo other >otherfile &&
		git add otherfile &&
		git commit -m other &&
		git checkout master
	)
'

rm -f "$U.K"

test_expect_success 'fetch with incomplete alternates' '
	git init K &&
	echo "$base_dir/A/.git/objects" >K/.git/objects/info/alternates &&
	(
		cd K &&
		git remote add J "file://$base_dir/J" &&
		GIT_TRACE_PACKET=$U.K git fetch J
	) &&
	master_object=$(cd A && git for-each-ref --format="%(objectname)" refs/heads/master) &&
	test -s "$U.K" &&
	! grep " want $master_object" "$U.K" &&
	tag_object=$(cd A && git for-each-ref --format="%(objectname)" refs/tags/HEAD) &&
	! grep " want $tag_object" "$U.K"
'

test_expect_success 'clone using repo with gitfile as a reference' '
	git clone --separate-git-dir=L A M &&
	git clone --reference=M A N &&
	echo "$base_dir/L/objects" >expected &&
	test_cmp expected "$base_dir/N/.git/objects/info/alternates"
'

test_expect_success 'clone using repo pointed at by gitfile as reference' '
	git clone --reference=M/.git A O &&
	echo "$base_dir/L/objects" >expected &&
	test_cmp expected "$base_dir/O/.git/objects/info/alternates"
'

test_expect_success 'clone and dissociate from reference' '
	git init P &&
	(
		cd P &&	test_commit one
	) &&
	git clone P Q &&
	(
		cd Q && test_commit two
	) &&
	git clone --no-local --reference=P Q R &&
	git clone --no-local --reference=P --dissociate Q S &&
	# removing the reference P would corrupt R but not S
	rm -fr P &&
	test_must_fail git -C R fsck &&
	git -C S fsck
'

test_done