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#!/bin/sh

test_description='partial clone'

. ./test-lib.sh

delete_object () {
	rm $1/.git/objects/$(echo $2 | sed -e 's|^..|&/|')
}

pack_as_from_promisor () {
	HASH=$(git -C repo pack-objects .git/objects/pack/pack) &&
	>repo/.git/objects/pack/pack-$HASH.promisor
}

promise_and_delete () {
	HASH=$(git -C repo rev-parse "$1") &&
	git -C repo tag -a -m message my_annotated_tag "$HASH" &&
	git -C repo rev-parse my_annotated_tag | pack_as_from_promisor &&
	git -C repo tag -d my_annotated_tag &&
	delete_object repo "$HASH"
}

test_expect_success 'missing reflog object, but promised by a commit, passes fsck' '
	test_create_repo repo &&
	test_commit -C repo my_commit &&

	A=$(git -C repo commit-tree -m a HEAD^{tree}) &&
	C=$(git -C repo commit-tree -m c -p $A HEAD^{tree}) &&

	# Reference $A only from reflog, and delete it
	git -C repo branch my_branch "$A" &&
	git -C repo branch -f my_branch my_commit &&
	delete_object repo "$A" &&

	# State that we got $C, which refers to $A, from promisor
	printf "$C\n" | pack_as_from_promisor &&

	# Normally, it fails
	test_must_fail git -C repo fsck &&

	# But with the extension, it succeeds
	git -C repo config core.repositoryformatversion 1 &&
	git -C repo config extensions.partialclone "arbitrary string" &&
	git -C repo fsck
'

test_expect_success 'missing reflog object, but promised by a tag, passes fsck' '
	rm -rf repo &&
	test_create_repo repo &&
	test_commit -C repo my_commit &&

	A=$(git -C repo commit-tree -m a HEAD^{tree}) &&
	git -C repo tag -a -m d my_tag_name $A &&
	T=$(git -C repo rev-parse my_tag_name) &&
	git -C repo tag -d my_tag_name &&

	# Reference $A only from reflog, and delete it
	git -C repo branch my_branch "$A" &&
	git -C repo branch -f my_branch my_commit &&
	delete_object repo "$A" &&

	# State that we got $T, which refers to $A, from promisor
	printf "$T\n" | pack_as_from_promisor &&

	git -C repo config core.repositoryformatversion 1 &&
	git -C repo config extensions.partialclone "arbitrary string" &&
	git -C repo fsck
'

test_expect_success 'missing reflog object alone fails fsck, even with extension set' '
	rm -rf repo &&
	test_create_repo repo &&
	test_commit -C repo my_commit &&

	A=$(git -C repo commit-tree -m a HEAD^{tree}) &&
	B=$(git -C repo commit-tree -m b HEAD^{tree}) &&

	# Reference $A only from reflog, and delete it
	git -C repo branch my_branch "$A" &&
	git -C repo branch -f my_branch my_commit &&
	delete_object repo "$A" &&

	git -C repo config core.repositoryformatversion 1 &&
	git -C repo config extensions.partialclone "arbitrary string" &&
	test_must_fail git -C repo fsck
'

test_expect_success 'missing ref object, but promised, passes fsck' '
	rm -rf repo &&
	test_create_repo repo &&
	test_commit -C repo my_commit &&

	A=$(git -C repo commit-tree -m a HEAD^{tree}) &&

	# Reference $A only from ref
	git -C repo branch my_branch "$A" &&
	promise_and_delete "$A" &&

	git -C repo config core.repositoryformatversion 1 &&
	git -C repo config extensions.partialclone "arbitrary string" &&
	git -C repo fsck
'

test_expect_success 'missing object, but promised, passes fsck' '
	rm -rf repo &&
	test_create_repo repo &&
	test_commit -C repo 1 &&
	test_commit -C repo 2 &&
	test_commit -C repo 3 &&
	git -C repo tag -a annotated_tag -m "annotated tag" &&

	C=$(git -C repo rev-parse 1) &&
	T=$(git -C repo rev-parse 2^{tree}) &&
	B=$(git hash-object repo/3.t) &&
	AT=$(git -C repo rev-parse annotated_tag) &&

	promise_and_delete "$C" &&
	promise_and_delete "$T" &&
	promise_and_delete "$B" &&
	promise_and_delete "$AT" &&

	git -C repo config core.repositoryformatversion 1 &&
	git -C repo config extensions.partialclone "arbitrary string" &&
	git -C repo fsck
'

test_expect_success 'missing CLI object, but promised, passes fsck' '
	rm -rf repo &&
	test_create_repo repo &&
	test_commit -C repo my_commit &&

	A=$(git -C repo commit-tree -m a HEAD^{tree}) &&
	promise_and_delete "$A" &&

	git -C repo config core.repositoryformatversion 1 &&
	git -C repo config extensions.partialclone "arbitrary string" &&
	git -C repo fsck "$A"
'

test_expect_success 'fetching of missing objects' '
	rm -rf repo &&
	test_create_repo server &&
	test_commit -C server foo &&
	git -C server repack -a -d --write-bitmap-index &&

	git clone "file://$(pwd)/server" repo &&
	HASH=$(git -C repo rev-parse foo) &&
	rm -rf repo/.git/objects/* &&

	git -C repo config core.repositoryformatversion 1 &&
	git -C repo config extensions.partialclone "origin" &&
	git -C repo cat-file -p "$HASH" &&

	# Ensure that the .promisor file is written, and check that its
	# associated packfile contains the object
	ls repo/.git/objects/pack/pack-*.promisor >promisorlist &&
	test_line_count = 1 promisorlist &&
	IDX=$(cat promisorlist | sed "s/promisor$/idx/") &&
	git verify-pack --verbose "$IDX" | grep "$HASH"
'

LIB_HTTPD_PORT=12345  # default port, 410, cannot be used as non-root
. "$TEST_DIRECTORY"/lib-httpd.sh
start_httpd

test_expect_success 'fetching of missing objects from an HTTP server' '
	rm -rf repo &&
	SERVER="$HTTPD_DOCUMENT_ROOT_PATH/server" &&
	test_create_repo "$SERVER" &&
	test_commit -C "$SERVER" foo &&
	git -C "$SERVER" repack -a -d --write-bitmap-index &&

	git clone $HTTPD_URL/smart/server repo &&
	HASH=$(git -C repo rev-parse foo) &&
	rm -rf repo/.git/objects/* &&

	git -C repo config core.repositoryformatversion 1 &&
	git -C repo config extensions.partialclone "origin" &&
	git -C repo cat-file -p "$HASH" &&

	# Ensure that the .promisor file is written, and check that its
	# associated packfile contains the object
	ls repo/.git/objects/pack/pack-*.promisor >promisorlist &&
	test_line_count = 1 promisorlist &&
	IDX=$(cat promisorlist | sed "s/promisor$/idx/") &&
	git verify-pack --verbose "$IDX" | grep "$HASH"
'

stop_httpd

test_done
debug log:

solving 8a90f6ab3 ...
found 8a90f6ab3 in https://80x24.org/mirrors/git.git

git@vger.kernel.org list mirror (unofficial, one of many)

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