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git/t/t0410-partial-clone.sh
Jonathan Tan 0c16cd499d gc: do not repack promisor packfiles 
Teach gc to stop traversal at promisor objects, and to leave promisor
packfiles alone. This has the effect of only repacking non-promisor
packfiles, and preserves the distinction between promisor packfiles and
non-promisor packfiles.

Signed-off-by: Jonathan Tan <jonathantanmy@google.com>
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-12-08 09:52:42 -08:00

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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 &&
echo $HASH
}
promise_and_delete () {
HASH=$(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 &&
# tag -d prints a message to stdout, so redirect it
git -C repo tag -d my_annotated_tag >/dev/null &&
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 "$HASH"
'
test_expect_success 'rev-list stops traversal at missing and promised commit' '
rm -rf repo &&
test_create_repo repo &&
test_commit -C repo foo &&
test_commit -C repo bar &&
FOO=$(git -C repo rev-parse foo) &&
promise_and_delete "$FOO" &&
git -C repo config core.repositoryformatversion 1 &&
git -C repo config extensions.partialclone "arbitrary string" &&
git -C repo rev-list --exclude-promisor-objects --objects bar >out &&
grep $(git -C repo rev-parse bar) out &&
! grep $FOO out
'
test_expect_success 'rev-list stops traversal at missing and promised tree' '
rm -rf repo &&
test_create_repo repo &&
test_commit -C repo foo &&
mkdir repo/a_dir &&
echo something >repo/a_dir/something &&
git -C repo add a_dir/something &&
git -C repo commit -m bar &&
# foo^{tree} (tree referenced from commit)
TREE=$(git -C repo rev-parse foo^{tree}) &&
# a tree referenced by HEAD^{tree} (tree referenced from tree)
TREE2=$(git -C repo ls-tree HEAD^{tree} | grep " tree " | head -1 | cut -b13-52) &&
promise_and_delete "$TREE" &&
promise_and_delete "$TREE2" &&
git -C repo config core.repositoryformatversion 1 &&
git -C repo config extensions.partialclone "arbitrary string" &&
git -C repo rev-list --exclude-promisor-objects --objects HEAD >out &&
grep $(git -C repo rev-parse foo) out &&
! grep $TREE out &&
grep $(git -C repo rev-parse HEAD) out &&
! grep $TREE2 out
'
test_expect_success 'rev-list stops traversal at missing and promised blob' '
rm -rf repo &&
test_create_repo repo &&
echo something >repo/something &&
git -C repo add something &&
git -C repo commit -m foo &&
BLOB=$(git -C repo hash-object -w something) &&
promise_and_delete "$BLOB" &&
git -C repo config core.repositoryformatversion 1 &&
git -C repo config extensions.partialclone "arbitrary string" &&
git -C repo rev-list --exclude-promisor-objects --objects HEAD >out &&
grep $(git -C repo rev-parse HEAD) out &&
! grep $BLOB out
'
test_expect_success 'rev-list stops traversal at promisor commit, tree, and blob' '
rm -rf repo &&
test_create_repo repo &&
test_commit -C repo foo &&
test_commit -C repo bar &&
test_commit -C repo baz &&
COMMIT=$(git -C repo rev-parse foo) &&
TREE=$(git -C repo rev-parse bar^{tree}) &&
BLOB=$(git hash-object repo/baz.t) &&
printf "%s\n%s\n%s\n" $COMMIT $TREE $BLOB | pack_as_from_promisor &&
git -C repo config core.repositoryformatversion 1 &&
git -C repo config extensions.partialclone "arbitrary string" &&
git -C repo rev-list --exclude-promisor-objects --objects HEAD >out &&
! grep $COMMIT out &&
! grep $TREE out &&
! grep $BLOB out &&
grep $(git -C repo rev-parse bar) out # sanity check that some walking was done
'
test_expect_success 'rev-list accepts missing and promised objects on command line' '
rm -rf repo &&
test_create_repo repo &&
test_commit -C repo foo &&
test_commit -C repo bar &&
test_commit -C repo baz &&
COMMIT=$(git -C repo rev-parse foo) &&
TREE=$(git -C repo rev-parse bar^{tree}) &&
BLOB=$(git hash-object repo/baz.t) &&
promise_and_delete $COMMIT &&
promise_and_delete $TREE &&
promise_and_delete $BLOB &&
git -C repo config core.repositoryformatversion 1 &&
git -C repo config extensions.partialclone "arbitrary string" &&
git -C repo rev-list --exclude-promisor-objects --objects "$COMMIT" "$TREE" "$BLOB"
'
test_expect_success 'gc does not repack promisor objects' '
rm -rf repo &&
test_create_repo repo &&
test_commit -C repo my_commit &&
TREE_HASH=$(git -C repo rev-parse HEAD^{tree}) &&
HASH=$(printf "$TREE_HASH\n" | pack_as_from_promisor) &&
git -C repo config core.repositoryformatversion 1 &&
git -C repo config extensions.partialclone "arbitrary string" &&
git -C repo gc &&
# Ensure that the promisor packfile still exists, and remove it
test -e repo/.git/objects/pack/pack-$HASH.pack &&
rm repo/.git/objects/pack/pack-$HASH.* &&
# Ensure that the single other pack contains the commit, but not the tree
ls repo/.git/objects/pack/pack-*.pack >packlist &&
test_line_count = 1 packlist &&
git verify-pack repo/.git/objects/pack/pack-*.pack -v >out &&
grep "$(git -C repo rev-parse HEAD)" out &&
! grep "$TREE_HASH" out
'
test_expect_success 'gc stops traversal when a missing but promised object is reached' '
rm -rf repo &&
test_create_repo repo &&
test_commit -C repo my_commit &&
TREE_HASH=$(git -C repo rev-parse HEAD^{tree}) &&
HASH=$(promise_and_delete $TREE_HASH) &&
git -C repo config core.repositoryformatversion 1 &&
git -C repo config extensions.partialclone "arbitrary string" &&
git -C repo gc &&
# Ensure that the promisor packfile still exists, and remove it
test -e repo/.git/objects/pack/pack-$HASH.pack &&
rm repo/.git/objects/pack/pack-$HASH.* &&
# Ensure that the single other pack contains the commit, but not the tree
ls repo/.git/objects/pack/pack-*.pack >packlist &&
test_line_count = 1 packlist &&
git verify-pack repo/.git/objects/pack/pack-*.pack -v >out &&
grep "$(git -C repo rev-parse HEAD)" out &&
! grep "$TREE_HASH" out
'
LIB_HTTPD_PORT=12345 # default port, 410, cannot be used as non-root
. "$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
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