#!/bin/sh
test_description='commit graph'
TEST_PASSES_SANITIZE_LEAK=true
. ./test-lib.sh
. "$TEST_DIRECTORY"/lib-chunk.sh
GIT_TEST_COMMIT_GRAPH_CHANGED_PATHS=0
test_expect_success 'usage' '
test_expect_code 129 git commit-graph write blah 2>err &&
test_expect_code 129 git commit-graph write verify
'
test_expect_success 'usage shown without sub-command' '
test_expect_code 129 git commit-graph 2>err &&
grep usage: err
'
test_expect_success 'usage shown with an error on unknown sub-command' '
cat >expect <<-\EOF &&
error: unknown subcommand: `unknown'\''
EOF
test_expect_code 129 git commit-graph unknown 2>stderr &&
grep error stderr >actual &&
test_cmp expect actual
'
objdir=".git/objects"
test_expect_success 'setup full repo' '
git init full
'
test_expect_success POSIXPERM 'tweak umask for modebit tests' '
umask 022
'
test_expect_success 'verify graph with no graph file' '
git -C full commit-graph verify
'
test_expect_success 'write graph with no packs' '
git -C full commit-graph write --object-dir $objdir &&
test_path_is_missing full/$objdir/info/commit-graph
'
test_expect_success 'exit with correct error on bad input to --stdin-packs' '
echo doesnotexist >in &&
test_expect_code 1 git -C full commit-graph write --stdin-packs \
<in 2>stderr &&
test_grep "error adding pack" stderr
'
test_expect_success 'create commits and repack' '
for i in $(test_seq 3)
do
test_commit -C full $i &&
git -C full branch commits/$i || return 1
done &&
git -C full repack
'
. "$TEST_DIRECTORY"/lib-commit-graph.sh
graph_git_behavior 'no graph' full commits/3 commits/1
test_expect_success 'exit with correct error on bad input to --stdin-commits' '
# invalid, non-hex OID
echo HEAD | test_expect_code 1 git -C full commit-graph write \
--stdin-commits 2>stderr &&
test_grep "unexpected non-hex object ID: HEAD" stderr &&
# non-existent OID
echo $ZERO_OID | test_expect_code 1 git -C full commit-graph write \
--stdin-commits 2>stderr &&
test_grep "invalid object" stderr &&
# valid commit and tree OID
git -C full rev-parse HEAD HEAD^{tree} >in &&
git -C full commit-graph write --stdin-commits <in &&
graph_read_expect -C full 3 generation_data
'
test_expect_success 'write graph' '
git -C full commit-graph write &&
test_path_is_file full/$objdir/info/commit-graph &&
graph_read_expect -C full 3 generation_data
'
test_expect_success POSIXPERM 'write graph has correct permissions' '
test_path_is_file full/$objdir/info/commit-graph &&
echo "-r--r--r--" >expect &&
test_modebits full/$objdir/info/commit-graph >actual &&
test_cmp expect actual
'
graph_git_behavior 'graph exists' full commits/3 commits/1
test_expect_success 'Add more commits' '
git -C full reset --hard commits/1 &&
for i in $(test_seq 4 5)
do
test_commit -C full $i &&
git -C full branch commits/$i || return 1
done &&
git -C full reset --hard commits/2 &&
for i in $(test_seq 6 7)
do
test_commit -C full $i &&
git -C full branch commits/$i || return 1
done &&
git -C full reset --hard commits/2 &&
git -C full merge commits/4 &&
git -C full branch merge/1 &&
git -C full reset --hard commits/4 &&
git -C full merge commits/6 &&
git -C full branch merge/2 &&
git -C full reset --hard commits/3 &&
git -C full merge commits/5 commits/7 &&
git -C full branch merge/3 &&
git -C full repack
'
test_expect_success 'commit-graph write progress off for redirected stderr' '
git -C full commit-graph write 2>err &&
test_must_be_empty err
'
test_expect_success 'commit-graph write force progress on for stderr' '
GIT_PROGRESS_DELAY=0 git -C full commit-graph write --progress 2>err &&
test_file_not_empty err
'
test_expect_success 'commit-graph write with the --no-progress option' '
git -C full commit-graph write --no-progress 2>err &&
test_must_be_empty err
'
test_expect_success 'commit-graph write --stdin-commits progress off for redirected stderr' '
git -C full rev-parse commits/5 >in &&
git -C full commit-graph write --stdin-commits <in 2>err &&
test_must_be_empty err
'
test_expect_success 'commit-graph write --stdin-commits force progress on for stderr' '
git -C full rev-parse commits/5 >in &&
GIT_PROGRESS_DELAY=0 git -C full commit-graph write --stdin-commits \
--progress <in 2>err &&
test_grep "Collecting commits from input" err
'
test_expect_success 'commit-graph write --stdin-commits with the --no-progress option' '
git -C full rev-parse commits/5 >in &&
git -C full commit-graph write --stdin-commits --no-progress <in 2>err &&
test_must_be_empty err
'
test_expect_success 'commit-graph verify progress off for redirected stderr' '
git -C full commit-graph verify 2>err &&
test_must_be_empty err
'
test_expect_success 'commit-graph verify force progress on for stderr' '
GIT_PROGRESS_DELAY=0 git -C full commit-graph verify --progress 2>err &&
test_file_not_empty err
'
test_expect_success 'commit-graph verify with the --no-progress option' '
git -C full commit-graph verify --no-progress 2>err &&
test_must_be_empty err
'
# Current graph structure:
#
# __M3___
# / | \
# 3 M1 5 M2 7
# |/ \|/ \|
# 2 4 6
# |___/____/
# 1
test_expect_success 'write graph with merges' '
git -C full commit-graph write &&
test_path_is_file full/$objdir/info/commit-graph &&
graph_read_expect -C full 10 "generation_data extra_edges"
'
graph_git_behavior 'merge 1 vs 2' full merge/1 merge/2
graph_git_behavior 'merge 1 vs 3' full merge/1 merge/3
graph_git_behavior 'merge 2 vs 3' full merge/2 merge/3
test_expect_success 'Add one more commit' '
test_commit -C full 8 &&
git -C full branch commits/8 &&
ls full/$objdir/pack | grep idx >existing-idx &&
git -C full repack &&
ls full/$objdir/pack| grep idx | grep -v -f existing-idx >new-idx
'
# Current graph structure:
#
# 8
# |
# __M3___
# / | \
# 3 M1 5 M2 7
# |/ \|/ \|
# 2 4 6
# |___/____/
# 1
graph_git_behavior 'mixed mode, commit 8 vs merge 1' full commits/8 merge/1
graph_git_behavior 'mixed mode, commit 8 vs merge 2' full commits/8 merge/2
test_expect_success 'write graph with new commit' '
git -C full commit-graph write &&
test_path_is_file full/$objdir/info/commit-graph &&
graph_read_expect -C full 11 "generation_data extra_edges"
'
graph_git_behavior 'full graph, commit 8 vs merge 1' full commits/8 merge/1
graph_git_behavior 'full graph, commit 8 vs merge 2' full commits/8 merge/2
test_expect_success 'write graph with nothing new' '
git -C full commit-graph write &&
test_path_is_file full/$objdir/info/commit-graph &&
graph_read_expect -C full 11 "generation_data extra_edges"
'
graph_git_behavior 'cleared graph, commit 8 vs merge 1' full commits/8 merge/1
graph_git_behavior 'cleared graph, commit 8 vs merge 2' full commits/8 merge/2
test_expect_success 'build graph from latest pack with closure' '
git -C full commit-graph write --stdin-packs <new-idx &&
test_path_is_file full/$objdir/info/commit-graph &&
graph_read_expect -C full 9 "generation_data extra_edges"
'
graph_git_behavior 'graph from pack, commit 8 vs merge 1' full commits/8 merge/1
graph_git_behavior 'graph from pack, commit 8 vs merge 2' full commits/8 merge/2
test_expect_success 'build graph from commits with closure' '
git -C full tag -a -m "merge" tag/merge merge/2 &&
git -C full rev-parse tag/merge >commits-in &&
git -C full rev-parse merge/1 >>commits-in &&
git -C full commit-graph write --stdin-commits <commits-in &&
test_path_is_file full/$objdir/info/commit-graph &&
graph_read_expect -C full 6 "generation_data"
'
graph_git_behavior 'graph from commits, commit 8 vs merge 1' full commits/8 merge/1
graph_git_behavior 'graph from commits, commit 8 vs merge 2' full commits/8 merge/2
test_expect_success 'build graph from commits with append' '
git -C full rev-parse merge/3 >in &&
git -C full commit-graph write --stdin-commits --append <in &&
test_path_is_file full/$objdir/info/commit-graph &&
graph_read_expect -C full 10 "generation_data extra_edges"
'
graph_git_behavior 'append graph, commit 8 vs merge 1' full commits/8 merge/1
graph_git_behavior 'append graph, commit 8 vs merge 2' full commits/8 merge/2
test_expect_success 'build graph using --reachable' '
git -C full commit-graph write --reachable &&
test_path_is_file full/$objdir/info/commit-graph &&
graph_read_expect -C full 11 "generation_data extra_edges"
'
graph_git_behavior 'append graph, commit 8 vs merge 1' full commits/8 merge/1
graph_git_behavior 'append graph, commit 8 vs merge 2' full commits/8 merge/2
test_expect_success 'setup bare repo' '
git clone --bare --no-local full bare
'
graph_git_behavior 'bare repo, commit 8 vs merge 1' bare commits/8 merge/1
graph_git_behavior 'bare repo, commit 8 vs merge 2' bare commits/8 merge/2
test_expect_success 'write graph in bare repo' '
git -C bare commit-graph write &&
test_path_is_file bare/objects/info/commit-graph &&
graph_read_expect -C bare 11 "generation_data extra_edges"
'
graph_git_behavior 'bare repo with graph, commit 8 vs merge 1' bare commits/8 merge/1
graph_git_behavior 'bare repo with graph, commit 8 vs merge 2' bare commits/8 merge/2
test_expect_success 'perform fast-forward merge in full repo' '
git -C full checkout -b merge-5-to-8 commits/5 &&
git -C full merge commits/8 &&
git -C full show-ref -s merge-5-to-8 >output &&
git -C full show-ref -s commits/8 >expect &&
test_cmp expect output
'
test_expect_success 'check that gc computes commit-graph' '
test_commit -C full --no-tag blank &&
git -C full commit-graph write --reachable &&
cp full/$objdir/info/commit-graph commit-graph-before-gc &&
git -C full reset --hard HEAD~1 &&
test_config -C full gc.writeCommitGraph true &&
git -C full gc &&
cp full/$objdir/info/commit-graph commit-graph-after-gc &&
! test_cmp_bin commit-graph-before-gc commit-graph-after-gc &&
git -C full commit-graph write --reachable &&
test_cmp_bin commit-graph-after-gc full/$objdir/info/commit-graph
'
test_expect_success 'replace-objects invalidates commit-graph' '
test_when_finished rm -rf replace &&
git clone full replace &&
(
cd replace &&
git commit-graph write --reachable &&
test_path_is_file .git/objects/info/commit-graph &&
git replace HEAD~1 HEAD~2 &&
graph_git_two_modes "commit-graph verify" &&
git -c core.commitGraph=false log >expect &&
git -c core.commitGraph=true log >actual &&
test_cmp expect actual &&
git commit-graph write --reachable &&
git -c core.commitGraph=false --no-replace-objects log >expect &&
git -c core.commitGraph=true --no-replace-objects log >actual &&
test_cmp expect actual &&
rm -rf .git/objects/info/commit-graph &&
git commit-graph write --reachable &&
test_path_is_file .git/objects/info/commit-graph
)
'
test_expect_success 'commit grafts invalidate commit-graph' '
test_when_finished rm -rf graft &&
git clone --template= full graft &&
(
cd graft &&
git commit-graph write --reachable &&
test_path_is_file .git/objects/info/commit-graph &&
H1=$(git rev-parse --verify HEAD~1) &&
H3=$(git rev-parse --verify HEAD~3) &&
mkdir .git/info &&
echo "$H1 $H3" >.git/info/grafts &&
git -c core.commitGraph=false log >expect &&
git -c core.commitGraph=true log >actual &&
test_cmp expect actual &&
git commit-graph write --reachable &&
git -c core.commitGraph=false --no-replace-objects log >expect &&
git -c core.commitGraph=true --no-replace-objects log >actual &&
test_cmp expect actual &&
rm -rf .git/objects/info/commit-graph &&
git commit-graph write --reachable &&
test_path_is_missing .git/objects/info/commit-graph
)
'
test_expect_success 'replace-objects invalidates commit-graph' '
test_when_finished rm -rf shallow &&
git clone --depth 2 "file://$TRASH_DIRECTORY/full" shallow &&
(
cd shallow &&
git commit-graph write --reachable &&
test_path_is_missing .git/objects/info/commit-graph &&
git fetch origin --unshallow &&
git commit-graph write --reachable &&
test_path_is_file .git/objects/info/commit-graph
)
'
test_expect_success 'warn on improper hash version' '
git init --object-format=sha1 sha1 &&
(
cd sha1 &&
test_commit 1 &&
git commit-graph write --reachable &&
mv .git/objects/info/commit-graph ../cg-sha1
) &&
git init --object-format=sha256 sha256 &&
(
cd sha256 &&
test_commit 1 &&
git commit-graph write --reachable &&
mv .git/objects/info/commit-graph ../cg-sha256
) &&
(
cd sha1 &&
mv ../cg-sha256 .git/objects/info/commit-graph &&
git log -1 2>err &&
test_grep "commit-graph hash version 2 does not match version 1" err
) &&
(
cd sha256 &&
mv ../cg-sha1 .git/objects/info/commit-graph &&
git log -1 2>err &&
test_grep "commit-graph hash version 1 does not match version 2" err
)
'
test_expect_success TIME_IS_64BIT,TIME_T_IS_64BIT 'lower layers have overflow chunk' '
UNIX_EPOCH_ZERO="@0 +0000" &&
FUTURE_DATE="@4147483646 +0000" &&
rm -f full/.git/objects/info/commit-graph &&
test_commit -C full --date "$FUTURE_DATE" future-1 &&
test_commit -C full --date "$UNIX_EPOCH_ZERO" old-1 &&
git -C full commit-graph write --reachable &&
test_commit -C full --date "$FUTURE_DATE" future-2 &&
test_commit -C full --date "$UNIX_EPOCH_ZERO" old-2 &&
git -C full commit-graph write --reachable --split=no-merge &&
test_commit -C full extra &&
git -C full commit-graph write --reachable --split=no-merge &&
git -C full commit-graph write --reachable &&
graph_read_expect -C full 16 \
"generation_data generation_data_overflow extra_edges" &&
mv full/.git/objects/info/commit-graph commit-graph-upgraded &&
git -C full commit-graph write --reachable &&
graph_read_expect -C full 16 \
"generation_data generation_data_overflow extra_edges" &&
test_cmp full/.git/objects/info/commit-graph commit-graph-upgraded
'
# the verify tests below expect the commit-graph to contain
# exactly the commits reachable from the commits/8 branch.
# If the file changes the set of commits in the list, then the
# offsets into the binary file will result in different edits
# and the tests will likely break.
test_expect_success 'git commit-graph verify' '
git -C full rev-parse commits/8 >in &&
git -C full -c commitGraph.generationVersion=1 commit-graph write \
--stdin-commits <in &&
git -C full commit-graph verify >output &&
graph_read_expect -C full 9 extra_edges 1
'
NUM_COMMITS=9
NUM_OCTOPUS_EDGES=2
HASH_LEN="$(test_oid rawsz)"
GRAPH_BYTE_VERSION=4
GRAPH_BYTE_HASH=5
GRAPH_BYTE_CHUNK_COUNT=6
GRAPH_CHUNK_LOOKUP_OFFSET=8
GRAPH_CHUNK_LOOKUP_WIDTH=12
GRAPH_CHUNK_LOOKUP_ROWS=5
GRAPH_BYTE_OID_FANOUT_ID=$GRAPH_CHUNK_LOOKUP_OFFSET
GRAPH_BYTE_OID_LOOKUP_ID=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
1 * $GRAPH_CHUNK_LOOKUP_WIDTH))
GRAPH_BYTE_COMMIT_DATA_ID=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
2 * $GRAPH_CHUNK_LOOKUP_WIDTH))
GRAPH_FANOUT_OFFSET=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
$GRAPH_CHUNK_LOOKUP_WIDTH * $GRAPH_CHUNK_LOOKUP_ROWS))
GRAPH_BYTE_FANOUT1=$(($GRAPH_FANOUT_OFFSET + 4 * 4))
GRAPH_BYTE_FANOUT2=$(($GRAPH_FANOUT_OFFSET + 4 * 255))
GRAPH_OID_LOOKUP_OFFSET=$(($GRAPH_FANOUT_OFFSET + 4 * 256))
GRAPH_BYTE_OID_LOOKUP_ORDER=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * 8))
GRAPH_BYTE_OID_LOOKUP_MISSING=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * 4 + 10))
GRAPH_COMMIT_DATA_WIDTH=$(($HASH_LEN + 16))
GRAPH_COMMIT_DATA_OFFSET=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * $NUM_COMMITS))
GRAPH_BYTE_COMMIT_TREE=$GRAPH_COMMIT_DATA_OFFSET
GRAPH_BYTE_COMMIT_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN))
GRAPH_BYTE_COMMIT_EXTRA_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 4))
GRAPH_BYTE_COMMIT_WRONG_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 3))
GRAPH_BYTE_COMMIT_GENERATION=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 11))
GRAPH_BYTE_COMMIT_GENERATION_LAST=$(($GRAPH_BYTE_COMMIT_GENERATION + $(($NUM_COMMITS - 1)) * $GRAPH_COMMIT_DATA_WIDTH))
GRAPH_BYTE_COMMIT_DATE=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 12))
GRAPH_OCTOPUS_DATA_OFFSET=$(($GRAPH_COMMIT_DATA_OFFSET + \
$GRAPH_COMMIT_DATA_WIDTH * $NUM_COMMITS))
GRAPH_BYTE_OCTOPUS=$(($GRAPH_OCTOPUS_DATA_OFFSET + 4))
GRAPH_BYTE_FOOTER=$(($GRAPH_OCTOPUS_DATA_OFFSET + 4 * $NUM_OCTOPUS_EDGES))
corrupt_graph_setup() {
test_when_finished mv commit-graph-backup full/$objdir/info/commit-graph &&
cp full/$objdir/info/commit-graph commit-graph-backup &&
chmod u+w full/$objdir/info/commit-graph
}
corrupt_graph_verify() {
grepstr=$1
test_must_fail git -C full commit-graph verify 2>test_err &&
grep -v "^+" test_err >err &&
test_grep "$grepstr" err &&
if test "$2" != "no-copy"
then
cp full/$objdir/info/commit-graph commit-graph-pre-write-test
fi &&
git -C full status --short &&
GIT_TEST_COMMIT_GRAPH_DIE_ON_PARSE=true git -C full commit-graph write &&
chmod u+w full/$objdir/info/commit-graph &&
git -C full commit-graph verify
}
# usage: corrupt_graph_and_verify <position> <data> <string> [<zero_pos>]
# Manipulates the commit-graph file at the position
# by inserting the data, optionally zeroing the file
# starting at <zero_pos>, then runs 'git commit-graph verify'
# and places the output in the file 'err'. Test 'err' for
# the given string.
corrupt_graph_and_verify() {
pos=$1
data="${2:-\0}"
grepstr=$3
corrupt_graph_setup &&
orig_size=$(wc -c <full/$objdir/info/commit-graph) &&
zero_pos=${4:-${orig_size}} &&
printf "$data" | dd of="full/$objdir/info/commit-graph" bs=1 seek="$pos" conv=notrunc &&
dd of="full/$objdir/info/commit-graph" bs=1 seek="$zero_pos" if=/dev/null &&
test-tool genzeros $(($orig_size - $zero_pos)) >>"full/$objdir/info/commit-graph" &&
corrupt_graph_verify "$grepstr"
}
test_expect_success POSIXPERM,SANITY 'detect permission problem' '
corrupt_graph_setup &&
chmod 000 full/$objdir/info/commit-graph &&
corrupt_graph_verify "Could not open" "no-copy"
'
test_expect_success 'detect too small' '
corrupt_graph_setup &&
echo "a small graph" >full/$objdir/info/commit-graph &&
corrupt_graph_verify "too small"
'
test_expect_success 'detect bad signature' '
corrupt_graph_and_verify 0 "\0" \
"graph signature"
'
test_expect_success 'detect bad version' '
corrupt_graph_and_verify $GRAPH_BYTE_VERSION "\02" \
"graph version"
'
test_expect_success 'detect bad hash version' '
corrupt_graph_and_verify $GRAPH_BYTE_HASH "\03" \
"hash version"
'
test_expect_success 'detect low chunk count' '
corrupt_graph_and_verify $GRAPH_BYTE_CHUNK_COUNT "\01" \
"final chunk has non-zero id"
'
test_expect_success 'detect missing OID fanout chunk' '
corrupt_graph_and_verify $GRAPH_BYTE_OID_FANOUT_ID "\0" \
"commit-graph required OID fanout chunk missing or corrupted"
'
test_expect_success 'detect missing OID lookup chunk' '
corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_ID "\0" \
"commit-graph required OID lookup chunk missing or corrupted"
'
test_expect_success 'detect missing commit data chunk' '
corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_DATA_ID "\0" \
"commit-graph required commit data chunk missing or corrupted"
'
test_expect_success 'detect incorrect fanout' '
corrupt_graph_and_verify $GRAPH_BYTE_FANOUT1 "\01" \
"fanout value"
'
test_expect_success 'detect incorrect fanout final value' '
corrupt_graph_and_verify $GRAPH_BYTE_FANOUT2 "\01" \
"OID lookup chunk is the wrong size"
'
test_expect_success 'detect incorrect OID order' '
corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_ORDER "\01" \
"incorrect OID order"
'
test_expect_success 'detect OID not in object database' '
corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_MISSING "\01" \
"from object database"
'
test_expect_success 'detect incorrect tree OID' '
corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_TREE "\01" \
"root tree OID for commit"
'
test_expect_success 'detect incorrect parent int-id' '
corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_PARENT "\01" \
"invalid parent"
'
test_expect_success 'detect extra parent int-id' '
corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_EXTRA_PARENT "\00" \
"is too long"
'
test_expect_success 'detect wrong parent' '
corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_WRONG_PARENT "\01" \
"commit-graph parent for"
'
test_expect_success 'detect incorrect generation number' '
corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_GENERATION "\070" \
"generation for commit"
'
test_expect_success 'detect incorrect commit date' '
corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_DATE "\01" \
"commit date"
'
test_expect_success 'detect incorrect parent for octopus merge' '
corrupt_graph_and_verify $GRAPH_BYTE_OCTOPUS "\01" \
"invalid parent"
'
test_expect_success 'detect invalid checksum hash' '
corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
"incorrect checksum"
'
test_expect_success 'detect incorrect chunk count' '
corrupt_graph_and_verify $GRAPH_BYTE_CHUNK_COUNT "\377" \
"commit-graph file is too small to hold [0-9]* chunks" \
$GRAPH_CHUNK_LOOKUP_OFFSET
'
test_expect_success 'detect mixed generation numbers (non-zero to zero)' '
corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_GENERATION_LAST "\0\0\0\0" \
"both zero and non-zero generations"
'
test_expect_success 'detect mixed generation numbers (zero to non-zero)' '
corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_GENERATION "\0\0\0\0" \
"both zero and non-zero generations"
'
test_expect_success 'git fsck (checks commit-graph when config set to true)' '
git -C full fsck &&
corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
"incorrect checksum" &&
cp commit-graph-pre-write-test full/$objdir/info/commit-graph &&
test_must_fail git -C full -c core.commitGraph=true fsck
'
test_expect_success 'git fsck (ignores commit-graph when config set to false)' '
git -C full fsck &&
corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
"incorrect checksum" &&
cp commit-graph-pre-write-test full/$objdir/info/commit-graph &&
git -C full -c core.commitGraph=false fsck
'
test_expect_success 'git fsck (checks commit-graph when config unset)' '
test_when_finished "git -C full config core.commitGraph true" &&
git -C full fsck &&
corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
"incorrect checksum" &&
test_unconfig -C full core.commitGraph &&
cp commit-graph-pre-write-test full/$objdir/info/commit-graph &&
test_must_fail git -C full fsck
'
test_expect_success 'git fsck shows commit-graph output with --progress' '
git -C "$TRASH_DIRECTORY/full" fsck --progress 2>err &&
grep "Verifying commits in commit graph" err
'
test_expect_success 'git fsck suppresses commit-graph output with --no-progress' '
git -C "$TRASH_DIRECTORY/full" fsck --no-progress 2>err &&
! grep "Verifying commits in commit graph" err
'
test_expect_success 'setup non-the_repository tests' '
rm -rf repo &&
git init repo &&
test_commit -C repo one &&
test_commit -C repo two &&
git -C repo config core.commitGraph true &&
git -C repo rev-parse two | \
git -C repo commit-graph write --stdin-commits
'
test_expect_success 'parse_commit_in_graph works for non-the_repository' '
test-tool repository parse_commit_in_graph \
repo/.git repo "$(git -C repo rev-parse two)" >actual &&
{
git -C repo log --pretty=format:"%ct " -1 &&
git -C repo rev-parse one
} >expect &&
test_cmp expect actual &&
test-tool repository parse_commit_in_graph \
repo/.git repo "$(git -C repo rev-parse one)" >actual &&
git -C repo log --pretty="%ct" -1 one >expect &&
test_cmp expect actual
'
test_expect_success 'get_commit_tree_in_graph works for non-the_repository' '
test-tool repository get_commit_tree_in_graph \
repo/.git repo "$(git -C repo rev-parse two)" >actual &&
git -C repo rev-parse two^{tree} >expect &&
test_cmp expect actual &&
test-tool repository get_commit_tree_in_graph \
repo/.git repo "$(git -C repo rev-parse one)" >actual &&
git -C repo rev-parse one^{tree} >expect &&
test_cmp expect actual
'
test_expect_success 'corrupt commit-graph write (broken parent)' '
rm -rf repo &&
git init repo &&
(
cd repo &&
empty="$(git mktree </dev/null)" &&
cat >broken <<-EOF &&
tree $empty
parent $ZERO_OID
author whatever <[email protected]> 1234 -0000
committer whatever <[email protected]> 1234 -0000
broken commit
EOF
broken="$(git hash-object -w -t commit --literally broken)" &&
git commit-tree -p "$broken" -m "good commit" "$empty" >good &&
test_must_fail git commit-graph write --stdin-commits \
<good 2>test_err &&
test_grep "unable to parse commit" test_err
)
'
test_expect_success 'corrupt commit-graph write (missing tree)' '
rm -rf repo &&
git init repo &&
(
cd repo &&
tree="$(git mktree </dev/null)" &&
cat >broken <<-EOF &&
parent $ZERO_OID
author whatever <[email protected]> 1234 -0000
committer whatever <[email protected]> 1234 -0000
broken commit
EOF
broken="$(git hash-object -w -t commit --literally broken)" &&
git commit-tree -p "$broken" -m "good" "$tree" >good &&
test_must_fail git commit-graph write --stdin-commits \
<good 2>test_err &&
test_grep "unable to parse commit" test_err
)
'
# We test the overflow-related code with the following repo history:
#
# 4:F - 5:N - 6:U
# / \
# 1:U - 2:N - 3:U M:N
# \ /
# 7:N - 8:F - 9:N
#
# Here the commits denoted by U have committer date of zero seconds
# since Unix epoch, the commits denoted by N have committer date
# starting from 1112354055 seconds since Unix epoch (default committer
# date for the test suite), and the commits denoted by F have committer
# date of (2 ^ 31 - 2) seconds since Unix epoch.
#
# The largest offset observed is 2 ^ 31, just large enough to overflow.
#
test_expect_success 'set up and verify repo with generation data overflow chunk' '
UNIX_EPOCH_ZERO="@0 +0000" &&
FUTURE_DATE="@2147483646 +0000" &&
git init repo &&
(
cd repo &&
test_commit --date "$UNIX_EPOCH_ZERO" 1 &&
test_commit 2 &&
test_commit --date "$UNIX_EPOCH_ZERO" 3 &&
git commit-graph write --reachable &&
graph_read_expect 3 generation_data &&
test_commit --date "$FUTURE_DATE" 4 &&
test_commit 5 &&
test_commit --date "$UNIX_EPOCH_ZERO" 6 &&
git branch left &&
git reset --hard 3 &&
test_commit 7 &&
test_commit --date "$FUTURE_DATE" 8 &&
test_commit 9 &&
git branch right &&
git reset --hard 3 &&
test_merge M left right &&
git commit-graph write --reachable &&
graph_read_expect 10 "generation_data generation_data_overflow" &&
git commit-graph verify
)
'
graph_git_behavior 'generation data overflow chunk repo' repo left right
test_expect_success 'overflow during generation version upgrade' '
git init overflow-v2-upgrade &&
(
cd overflow-v2-upgrade &&
# This commit will have a date at two seconds past the Epoch,
# and a (v1) generation number of 1, since it is a root commit.
#
# The offset will then be computed as 1-2, which will underflow
# to 2^31, which is greater than the v2 offset small limit of
# 2^31-1.
#
# This is sufficient to need a large offset table for the v2
# generation numbers.
test_commit --date "@2 +0000" base &&
git repack -d &&
# Test that upgrading from generation v1 to v2 correctly
# produces the overflow table.
git -c commitGraph.generationVersion=1 commit-graph write &&
git -c commitGraph.generationVersion=2 commit-graph write \
--changed-paths &&
git rev-list --all
)
'
corrupt_chunk () {
graph=full/.git/objects/info/commit-graph &&
test_when_finished "rm -rf $graph" &&
git -C full commit-graph write --reachable &&
corrupt_chunk_file $graph "$@"
}
check_corrupt_chunk () {
corrupt_chunk "$@" &&
git -C full -c core.commitGraph=false log >expect.out &&
git -C full -c core.commitGraph=true log >out 2>err &&
test_cmp expect.out out
}
test_expect_success 'reader notices too-small oid fanout chunk' '
# make it big enough that the graph file is plausible,
# otherwise we hit an earlier check
check_corrupt_chunk OIDF clear $(printf "000000%02x" $(test_seq 250)) &&
cat >expect.err <<-\EOF &&
error: commit-graph oid fanout chunk is wrong size
error: commit-graph required OID fanout chunk missing or corrupted
EOF
test_cmp expect.err err
'
test_expect_success 'reader notices fanout/lookup table mismatch' '
check_corrupt_chunk OIDF 1020 "FFFFFFFF" &&
cat >expect.err <<-\EOF &&
error: commit-graph OID lookup chunk is the wrong size
error: commit-graph required OID lookup chunk missing or corrupted
EOF
test_cmp expect.err err
'
test_expect_success 'reader notices out-of-bounds fanout' '
# Rather than try to corrupt a specific hash, we will just
# wreck them all. But we cannot just set them all to 0xFFFFFFFF or
# similar, as they are used for hi/lo starts in a binary search (so if
# they are identical, that indicates that the search should abort
# immediately). Instead, we will give them high values that differ by
# 2^24, ensuring that any that are used would cause an out-of-bounds
# read.
check_corrupt_chunk OIDF 0 $(printf "%02x000000" $(test_seq 0 254)) &&
cat >expect.err <<-\EOF &&
error: commit-graph fanout values out of order
error: commit-graph required OID fanout chunk missing or corrupted
EOF
test_cmp expect.err err
'
test_expect_success 'reader notices too-small commit data chunk' '
check_corrupt_chunk CDAT clear 00000000 &&
cat >expect.err <<-\EOF &&
error: commit-graph commit data chunk is wrong size
error: commit-graph required commit data chunk missing or corrupted
EOF
test_cmp expect.err err
'
test_expect_success 'reader notices out-of-bounds extra edge' '
check_corrupt_chunk EDGE clear &&
cat >expect.err <<-\EOF &&
error: commit-graph extra-edges pointer out of bounds
EOF
test_cmp expect.err err
'
test_expect_success 'reader notices too-small generations chunk' '
check_corrupt_chunk GDA2 clear 00000000 &&
cat >expect.err <<-\EOF &&
error: commit-graph generations chunk is wrong size
EOF
test_cmp expect.err err
'
test_expect_success 'stale commit cannot be parsed when given directly' '
test_when_finished "rm -rf repo" &&
git init repo &&
(
cd repo &&
test_commit A &&
test_commit B &&
git commit-graph write --reachable &&
oid=$(git rev-parse B) &&
rm .git/objects/"$(test_oid_to_path "$oid")" &&
# Verify that it is possible to read the commit from the
# commit graph when not being paranoid, ...
git rev-list B &&
# ... but parsing the commit when double checking that
# it actually exists in the object database should fail.
test_must_fail env GIT_COMMIT_GRAPH_PARANOIA=true git rev-list -1 B
)
'
test_expect_success 'stale commit cannot be parsed when traversing graph' '
test_when_finished "rm -rf repo" &&
git init repo &&
(
cd repo &&
test_commit A &&
test_commit B &&
test_commit C &&
git commit-graph write --reachable &&
# Corrupt the repository by deleting the intermediate commit
# object. Commands should notice that this object is absent and
# thus that the repository is corrupt even if the commit graph
# exists.
oid=$(git rev-parse B) &&
rm .git/objects/"$(test_oid_to_path "$oid")" &&
# Again, we should be able to parse the commit when not
# being paranoid about commit graph staleness...
git rev-parse HEAD~2 &&
# ... but fail when we are paranoid.
test_must_fail env GIT_COMMIT_GRAPH_PARANOIA=true git rev-parse HEAD~2 2>error &&
grep "error: commit $oid exists in commit-graph but not in the object database" error
)
'
test_done
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