#!/bin/sh test_description='commit graph' . ./test-lib.sh test_expect_success 'setup full repo' ' mkdir full && cd "$TRASH_DIRECTORY/full" && git init && git config core.commitGraph true && objdir=".git/objects" ' test_expect_success 'verify graph with no graph file' ' cd "$TRASH_DIRECTORY/full" && git commit-graph verify ' test_expect_success 'write graph with no packs' ' cd "$TRASH_DIRECTORY/full" && git commit-graph write --object-dir . && test_path_is_file info/commit-graph ' test_expect_success 'create commits and repack' ' cd "$TRASH_DIRECTORY/full" && for i in $(test_seq 3) do test_commit $i && git branch commits/$i done && git repack ' graph_git_two_modes() { git -c core.commitGraph=true $1 >output git -c core.commitGraph=false $1 >expect test_cmp output expect } graph_git_behavior() { MSG=$1 DIR=$2 BRANCH=$3 COMPARE=$4 test_expect_success "check normal git operations: $MSG" ' cd "$TRASH_DIRECTORY/$DIR" && graph_git_two_modes "log --oneline $BRANCH" && graph_git_two_modes "log --topo-order $BRANCH" && graph_git_two_modes "log --graph $COMPARE..$BRANCH" && graph_git_two_modes "branch -vv" && graph_git_two_modes "merge-base -a $BRANCH $COMPARE" ' } graph_git_behavior 'no graph' full commits/3 commits/1 graph_read_expect() { OPTIONAL="" NUM_CHUNKS=3 if test ! -z $2 then OPTIONAL=" $2" NUM_CHUNKS=$((3 + $(echo "$2" | wc -w))) fi cat >expect <<- EOF header: 43475048 1 1 $NUM_CHUNKS 0 num_commits: $1 chunks: oid_fanout oid_lookup commit_metadata$OPTIONAL EOF git commit-graph read >output && test_cmp expect output } test_expect_success 'write graph' ' cd "$TRASH_DIRECTORY/full" && graph1=$(git commit-graph write) && test_path_is_file $objdir/info/commit-graph && graph_read_expect "3" ' graph_git_behavior 'graph exists' full commits/3 commits/1 test_expect_success 'Add more commits' ' cd "$TRASH_DIRECTORY/full" && git reset --hard commits/1 && for i in $(test_seq 4 5) do test_commit $i && git branch commits/$i done && git reset --hard commits/2 && for i in $(test_seq 6 7) do test_commit $i && git branch commits/$i done && git reset --hard commits/2 && git merge commits/4 && git branch merge/1 && git reset --hard commits/4 && git merge commits/6 && git branch merge/2 && git reset --hard commits/3 && git merge commits/5 commits/7 && git branch merge/3 && git repack ' # Current graph structure: # # __M3___ # / | \ # 3 M1 5 M2 7 # |/ \|/ \| # 2 4 6 # |___/____/ # 1 test_expect_success 'write graph with merges' ' cd "$TRASH_DIRECTORY/full" && git commit-graph write && test_path_is_file $objdir/info/commit-graph && graph_read_expect "10" "large_edges" ' graph_git_behavior 'merge 1 vs 2' full merge/1 merge/2 graph_git_behavior 'merge 1 vs 3' full merge/1 merge/3 graph_git_behavior 'merge 2 vs 3' full merge/2 merge/3 test_expect_success 'Add one more commit' ' cd "$TRASH_DIRECTORY/full" && test_commit 8 && git branch commits/8 && ls $objdir/pack | grep idx >existing-idx && git repack && ls $objdir/pack| grep idx | grep -v --file=existing-idx >new-idx ' # Current graph structure: # # 8 # | # __M3___ # / | \ # 3 M1 5 M2 7 # |/ \|/ \| # 2 4 6 # |___/____/ # 1 graph_git_behavior 'mixed mode, commit 8 vs merge 1' full commits/8 merge/1 graph_git_behavior 'mixed mode, commit 8 vs merge 2' full commits/8 merge/2 test_expect_success 'write graph with new commit' ' cd "$TRASH_DIRECTORY/full" && git commit-graph write && test_path_is_file $objdir/info/commit-graph && graph_read_expect "11" "large_edges" ' graph_git_behavior 'full graph, commit 8 vs merge 1' full commits/8 merge/1 graph_git_behavior 'full graph, commit 8 vs merge 2' full commits/8 merge/2 test_expect_success 'write graph with nothing new' ' cd "$TRASH_DIRECTORY/full" && git commit-graph write && test_path_is_file $objdir/info/commit-graph && graph_read_expect "11" "large_edges" ' graph_git_behavior 'cleared graph, commit 8 vs merge 1' full commits/8 merge/1 graph_git_behavior 'cleared graph, commit 8 vs merge 2' full commits/8 merge/2 test_expect_success 'build graph from latest pack with closure' ' cd "$TRASH_DIRECTORY/full" && cat new-idx | git commit-graph write --stdin-packs && test_path_is_file $objdir/info/commit-graph && graph_read_expect "9" "large_edges" ' graph_git_behavior 'graph from pack, commit 8 vs merge 1' full commits/8 merge/1 graph_git_behavior 'graph from pack, commit 8 vs merge 2' full commits/8 merge/2 test_expect_success 'build graph from commits with closure' ' cd "$TRASH_DIRECTORY/full" && git tag -a -m "merge" tag/merge merge/2 && git rev-parse tag/merge >commits-in && git rev-parse merge/1 >>commits-in && cat commits-in | git commit-graph write --stdin-commits && test_path_is_file $objdir/info/commit-graph && graph_read_expect "6" ' graph_git_behavior 'graph from commits, commit 8 vs merge 1' full commits/8 merge/1 graph_git_behavior 'graph from commits, commit 8 vs merge 2' full commits/8 merge/2 test_expect_success 'build graph from commits with append' ' cd "$TRASH_DIRECTORY/full" && git rev-parse merge/3 | git commit-graph write --stdin-commits --append && test_path_is_file $objdir/info/commit-graph && graph_read_expect "10" "large_edges" ' graph_git_behavior 'append graph, commit 8 vs merge 1' full commits/8 merge/1 graph_git_behavior 'append graph, commit 8 vs merge 2' full commits/8 merge/2 test_expect_success 'build graph using --reachable' ' cd "$TRASH_DIRECTORY/full" && git commit-graph write --reachable && test_path_is_file $objdir/info/commit-graph && graph_read_expect "11" "large_edges" ' graph_git_behavior 'append graph, commit 8 vs merge 1' full commits/8 merge/1 graph_git_behavior 'append graph, commit 8 vs merge 2' full commits/8 merge/2 test_expect_success 'setup bare repo' ' cd "$TRASH_DIRECTORY" && git clone --bare --no-local full bare && cd bare && git config core.commitGraph true && baredir="./objects" ' 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' ' cd "$TRASH_DIRECTORY/bare" && git commit-graph write && test_path_is_file $baredir/info/commit-graph && graph_read_expect "11" "large_edges" ' graph_git_behavior 'bare repo with graph, commit 8 vs merge 1' bare commits/8 merge/1 graph_git_behavior 'bare repo with graph, commit 8 vs merge 2' bare commits/8 merge/2 test_expect_success 'perform fast-forward merge in full repo' ' cd "$TRASH_DIRECTORY/full" && git checkout -b merge-5-to-8 commits/5 && git merge commits/8 && git show-ref -s merge-5-to-8 >output && git show-ref -s commits/8 >expect && test_cmp expect output ' test_expect_success 'check that gc computes commit-graph' ' cd "$TRASH_DIRECTORY/full" && git commit --allow-empty -m "blank" && git commit-graph write --reachable && cp $objdir/info/commit-graph commit-graph-before-gc && git reset --hard HEAD~1 && git config gc.writeCommitGraph true && git gc && cp $objdir/info/commit-graph commit-graph-after-gc && ! test_cmp commit-graph-before-gc commit-graph-after-gc && git commit-graph write --reachable && test_cmp commit-graph-after-gc $objdir/info/commit-graph ' # the verify tests below expect the commit-graph to contain # exactly the commits reachable from the commits/8 branch. # If the file changes the set of commits in the list, then the # offsets into the binary file will result in different edits # and the tests will likely break. test_expect_success 'git commit-graph verify' ' cd "$TRASH_DIRECTORY/full" && git rev-parse commits/8 | git commit-graph write --stdin-commits && git commit-graph verify >output ' NUM_COMMITS=9 NUM_OCTOPUS_EDGES=2 HASH_LEN=20 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 + $HASH_LEN * 4 + 10)) GRAPH_COMMIT_DATA_OFFSET=$(($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 + $HASH_LEN + 11)) GRAPH_BYTE_COMMIT_DATE=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 12)) GRAPH_COMMIT_DATA_WIDTH=$(($HASH_LEN + 16)) GRAPH_OCTOPUS_DATA_OFFSET=$(($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)) # usage: corrupt_graph_and_verify # Manipulates the commit-graph file at the position # by inserting the data, 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=$3 cd "$TRASH_DIRECTORY/full" && test_when_finished mv commit-graph-backup $objdir/info/commit-graph && cp $objdir/info/commit-graph commit-graph-backup && printf "$data" | dd of="$objdir/info/commit-graph" bs=1 seek="$pos" conv=notrunc && test_must_fail git commit-graph verify 2>test_err && grep -v "^+" test_err >err test_i18ngrep "$grepstr" err } 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 "\02" \ "hash version" ' test_expect_success 'detect low chunk count' ' corrupt_graph_and_verify $GRAPH_BYTE_CHUNK_COUNT "\02" \ "missing the .* chunk" ' test_expect_success 'detect missing OID fanout chunk' ' corrupt_graph_and_verify $GRAPH_BYTE_OID_FANOUT_ID "\0" \ "missing the OID Fanout chunk" ' test_expect_success 'detect missing OID lookup chunk' ' corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_ID "\0" \ "missing the OID Lookup chunk" ' test_expect_success 'detect missing commit data chunk' ' corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_DATA_ID "\0" \ "missing the Commit Data chunk" ' 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" \ "fanout value" ' 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 generation number' ' corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_GENERATION "\01" \ "non-zero generation number" ' 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 $GRAPH_BYTE_FOOTER "\00" \ "incorrect checksum" ' test_expect_success 'git fsck (checks commit-graph)' ' cd "$TRASH_DIRECTORY/full" && git fsck && corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \ "incorrect checksum" && test_must_fail git fsck ' test_done