746 lines
23 KiB
Bash
Executable File
746 lines
23 KiB
Bash
Executable File
#!/bin/sh
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test_description='split commit graph'
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TEST_PASSES_SANITIZE_LEAK=true
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. ./test-lib.sh
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. "$TEST_DIRECTORY"/lib-chunk.sh
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GIT_TEST_COMMIT_GRAPH=0
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GIT_TEST_COMMIT_GRAPH_CHANGED_PATHS=0
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test_expect_success 'setup repo' '
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git init &&
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git config core.commitGraph true &&
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git config gc.writeCommitGraph false &&
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objdir=".git/objects" &&
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infodir="$objdir/info" &&
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graphdir="$infodir/commit-graphs" &&
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test_oid_cache <<-EOM
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shallow sha1:2132
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shallow sha256:2436
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base sha1:1408
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base sha256:1528
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oid_version sha1:1
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oid_version sha256:2
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EOM
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'
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graph_read_expect() {
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NUM_BASE=0
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if test ! -z $2
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then
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NUM_BASE=$2
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fi
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OPTIONS=
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if test -z "$3"
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then
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OPTIONS=" read_generation_data"
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fi
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cat >expect <<- EOF
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header: 43475048 1 $(test_oid oid_version) 4 $NUM_BASE
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num_commits: $1
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chunks: oid_fanout oid_lookup commit_metadata generation_data
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options:$OPTIONS
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EOF
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test-tool read-graph >output &&
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test_cmp expect output
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}
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test_expect_success POSIXPERM 'tweak umask for modebit tests' '
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umask 022
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'
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test_expect_success 'create commits and write commit-graph' '
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for i in $(test_seq 3)
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do
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test_commit $i &&
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git branch commits/$i || return 1
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done &&
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git commit-graph write --reachable &&
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test_path_is_file $infodir/commit-graph &&
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graph_read_expect 3
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'
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graph_git_two_modes() {
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git ${2:+ -C "$2"} -c core.commitGraph=true $1 >output &&
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git ${2:+ -C "$2"} -c core.commitGraph=false $1 >expect &&
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test_cmp expect output
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}
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graph_git_behavior() {
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MSG=$1
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BRANCH=$2
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COMPARE=$3
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DIR=$4
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test_expect_success "check normal git operations: $MSG" '
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graph_git_two_modes "log --oneline $BRANCH" "$DIR" &&
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graph_git_two_modes "log --topo-order $BRANCH" "$DIR" &&
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graph_git_two_modes "log --graph $COMPARE..$BRANCH" "$DIR" &&
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graph_git_two_modes "branch -vv" "$DIR" &&
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graph_git_two_modes "merge-base -a $BRANCH $COMPARE" "$DIR"
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'
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}
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graph_git_behavior 'graph exists' commits/3 commits/1
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verify_chain_files_exist() {
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for hash in $(cat $1/commit-graph-chain)
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do
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test_path_is_file $1/graph-$hash.graph || return 1
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done
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}
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test_expect_success 'add more commits, and write a new base graph' '
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git reset --hard commits/1 &&
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for i in $(test_seq 4 5)
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do
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test_commit $i &&
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git branch commits/$i || return 1
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done &&
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git reset --hard commits/2 &&
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for i in $(test_seq 6 10)
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do
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test_commit $i &&
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git branch commits/$i || return 1
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done &&
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git reset --hard commits/2 &&
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git merge commits/4 &&
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git branch merge/1 &&
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git reset --hard commits/4 &&
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git merge commits/6 &&
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git branch merge/2 &&
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git commit-graph write --reachable &&
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graph_read_expect 12
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'
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test_expect_success 'fork and fail to base a chain on a commit-graph file' '
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test_when_finished rm -rf fork &&
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git clone . fork &&
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(
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cd fork &&
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rm .git/objects/info/commit-graph &&
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echo "$(pwd)/../.git/objects" >.git/objects/info/alternates &&
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test_commit new-commit &&
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git commit-graph write --reachable --split &&
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test_path_is_file $graphdir/commit-graph-chain &&
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test_line_count = 1 $graphdir/commit-graph-chain &&
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verify_chain_files_exist $graphdir
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)
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'
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test_expect_success 'add three more commits, write a tip graph' '
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git reset --hard commits/3 &&
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git merge merge/1 &&
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git merge commits/5 &&
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git merge merge/2 &&
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git branch merge/3 &&
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git commit-graph write --reachable --split &&
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test_path_is_missing $infodir/commit-graph &&
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test_path_is_file $graphdir/commit-graph-chain &&
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ls $graphdir/graph-*.graph >graph-files &&
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test_line_count = 2 graph-files &&
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verify_chain_files_exist $graphdir
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'
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graph_git_behavior 'split commit-graph: merge 3 vs 2' merge/3 merge/2
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test_expect_success 'add one commit, write a tip graph' '
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test_commit 11 &&
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git branch commits/11 &&
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git commit-graph write --reachable --split &&
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test_path_is_missing $infodir/commit-graph &&
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test_path_is_file $graphdir/commit-graph-chain &&
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ls $graphdir/graph-*.graph >graph-files &&
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test_line_count = 3 graph-files &&
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verify_chain_files_exist $graphdir
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'
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graph_git_behavior 'three-layer commit-graph: commit 11 vs 6' commits/11 commits/6
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test_expect_success 'add one commit, write a merged graph' '
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test_commit 12 &&
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git branch commits/12 &&
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git commit-graph write --reachable --split &&
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test_path_is_file $graphdir/commit-graph-chain &&
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test_line_count = 2 $graphdir/commit-graph-chain &&
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ls $graphdir/graph-*.graph >graph-files &&
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test_line_count = 2 graph-files &&
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verify_chain_files_exist $graphdir
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'
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graph_git_behavior 'merged commit-graph: commit 12 vs 6' commits/12 commits/6
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test_expect_success 'create fork and chain across alternate' '
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git clone . fork &&
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(
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cd fork &&
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git config core.commitGraph true &&
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rm -rf $graphdir &&
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echo "$(pwd)/../.git/objects" >.git/objects/info/alternates &&
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test_commit 13 &&
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git branch commits/13 &&
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git commit-graph write --reachable --split &&
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test_path_is_file $graphdir/commit-graph-chain &&
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test_line_count = 3 $graphdir/commit-graph-chain &&
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ls $graphdir/graph-*.graph >graph-files &&
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test_line_count = 1 graph-files &&
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git -c core.commitGraph=true rev-list HEAD >expect &&
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git -c core.commitGraph=false rev-list HEAD >actual &&
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test_cmp expect actual &&
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test_commit 14 &&
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git commit-graph write --reachable --split --object-dir=.git/objects/ &&
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test_line_count = 3 $graphdir/commit-graph-chain &&
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ls $graphdir/graph-*.graph >graph-files &&
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test_line_count = 1 graph-files
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)
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'
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if test -d fork
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then
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graph_git_behavior 'alternate: commit 13 vs 6' commits/13 origin/commits/6 "fork"
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fi
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test_expect_success 'test merge stragety constants' '
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git clone . merge-2 &&
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(
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cd merge-2 &&
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git config core.commitGraph true &&
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test_line_count = 2 $graphdir/commit-graph-chain &&
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test_commit 14 &&
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git commit-graph write --reachable --split --size-multiple=2 &&
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test_line_count = 3 $graphdir/commit-graph-chain
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) &&
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git clone . merge-10 &&
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(
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cd merge-10 &&
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git config core.commitGraph true &&
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test_line_count = 2 $graphdir/commit-graph-chain &&
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test_commit 14 &&
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git commit-graph write --reachable --split --size-multiple=10 &&
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test_line_count = 1 $graphdir/commit-graph-chain &&
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ls $graphdir/graph-*.graph >graph-files &&
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test_line_count = 1 graph-files
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) &&
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git clone . merge-10-expire &&
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(
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cd merge-10-expire &&
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git config core.commitGraph true &&
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test_line_count = 2 $graphdir/commit-graph-chain &&
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test_commit 15 &&
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touch $graphdir/to-delete.graph $graphdir/to-keep.graph &&
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test-tool chmtime =1546362000 $graphdir/to-delete.graph &&
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test-tool chmtime =1546362001 $graphdir/to-keep.graph &&
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git commit-graph write --reachable --split --size-multiple=10 \
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--expire-time="2019-01-01 12:00 -05:00" &&
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test_line_count = 1 $graphdir/commit-graph-chain &&
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test_path_is_missing $graphdir/to-delete.graph &&
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test_path_is_file $graphdir/to-keep.graph &&
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ls $graphdir/graph-*.graph >graph-files &&
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test_line_count = 3 graph-files
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) &&
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git clone --no-hardlinks . max-commits &&
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(
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cd max-commits &&
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git config core.commitGraph true &&
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test_line_count = 2 $graphdir/commit-graph-chain &&
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test_commit 16 &&
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test_commit 17 &&
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git commit-graph write --reachable --split --max-commits=1 &&
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test_line_count = 1 $graphdir/commit-graph-chain &&
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ls $graphdir/graph-*.graph >graph-files &&
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test_line_count = 1 graph-files
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)
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'
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test_expect_success 'remove commit-graph-chain file after flattening' '
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git clone . flatten &&
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(
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cd flatten &&
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test_line_count = 2 $graphdir/commit-graph-chain &&
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git commit-graph write --reachable &&
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test_path_is_missing $graphdir/commit-graph-chain &&
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ls $graphdir >graph-files &&
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test_line_count = 0 graph-files
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)
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'
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corrupt_file() {
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file=$1
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pos=$2
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data="${3:-\0}"
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chmod a+w "$file" &&
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printf "$data" | dd of="$file" bs=1 seek="$pos" conv=notrunc
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}
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test_expect_success 'verify hashes along chain, even in shallow' '
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git clone --no-hardlinks . verify &&
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(
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cd verify &&
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git commit-graph verify &&
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base_file=$graphdir/graph-$(head -n 1 $graphdir/commit-graph-chain).graph &&
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corrupt_file "$base_file" $(test_oid shallow) "\01" &&
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test_must_fail git commit-graph verify --shallow 2>test_err &&
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grep -v "^+" test_err >err &&
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test_grep "incorrect checksum" err
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)
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'
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test_expect_success 'verify notices chain slice which is bogus (base)' '
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git clone --no-hardlinks . verify-chain-bogus-base &&
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(
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cd verify-chain-bogus-base &&
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git commit-graph verify &&
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base_file=$graphdir/graph-$(sed -n 1p $graphdir/commit-graph-chain).graph &&
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echo "garbage" >$base_file &&
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test_must_fail git commit-graph verify 2>test_err &&
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grep -v "^+" test_err >err &&
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grep "commit-graph file is too small" err
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)
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'
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test_expect_success 'verify notices chain slice which is bogus (tip)' '
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git clone --no-hardlinks . verify-chain-bogus-tip &&
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(
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cd verify-chain-bogus-tip &&
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git commit-graph verify &&
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tip_file=$graphdir/graph-$(sed -n 2p $graphdir/commit-graph-chain).graph &&
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echo "garbage" >$tip_file &&
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test_must_fail git commit-graph verify 2>test_err &&
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grep -v "^+" test_err >err &&
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grep "commit-graph file is too small" err
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)
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'
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test_expect_success 'verify --shallow does not check base contents' '
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git clone --no-hardlinks . verify-shallow &&
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(
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cd verify-shallow &&
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git commit-graph verify &&
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base_file=$graphdir/graph-$(head -n 1 $graphdir/commit-graph-chain).graph &&
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corrupt_file "$base_file" 1500 "\01" &&
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git commit-graph verify --shallow &&
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test_must_fail git commit-graph verify 2>test_err &&
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grep -v "^+" test_err >err &&
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test_grep "incorrect checksum" err
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)
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'
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test_expect_success 'warn on base graph chunk incorrect' '
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git clone --no-hardlinks . base-chunk &&
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(
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cd base-chunk &&
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git commit-graph verify &&
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base_file=$graphdir/graph-$(tail -n 1 $graphdir/commit-graph-chain).graph &&
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corrupt_file "$base_file" $(test_oid base) "\01" &&
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test_must_fail git commit-graph verify --shallow 2>test_err &&
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grep -v "^+" test_err >err &&
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test_grep "commit-graph chain does not match" err
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)
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'
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test_expect_success 'verify after commit-graph-chain corruption (base)' '
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git clone --no-hardlinks . verify-chain-base &&
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(
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cd verify-chain-base &&
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corrupt_file "$graphdir/commit-graph-chain" 30 "G" &&
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test_must_fail git commit-graph verify 2>test_err &&
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grep -v "^+" test_err >err &&
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test_grep "invalid commit-graph chain" err &&
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corrupt_file "$graphdir/commit-graph-chain" 30 "A" &&
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test_must_fail git commit-graph verify 2>test_err &&
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grep -v "^+" test_err >err &&
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test_grep "unable to find all commit-graph files" err
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)
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'
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test_expect_success 'verify after commit-graph-chain corruption (tip)' '
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git clone --no-hardlinks . verify-chain-tip &&
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(
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cd verify-chain-tip &&
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corrupt_file "$graphdir/commit-graph-chain" 70 "G" &&
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test_must_fail git commit-graph verify 2>test_err &&
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grep -v "^+" test_err >err &&
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test_grep "invalid commit-graph chain" err &&
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corrupt_file "$graphdir/commit-graph-chain" 70 "A" &&
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test_must_fail git commit-graph verify 2>test_err &&
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grep -v "^+" test_err >err &&
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test_grep "unable to find all commit-graph files" err
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)
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'
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test_expect_success 'verify notices too-short chain file' '
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git clone --no-hardlinks . verify-chain-short &&
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(
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cd verify-chain-short &&
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git commit-graph verify &&
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echo "garbage" >$graphdir/commit-graph-chain &&
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test_must_fail git commit-graph verify 2>test_err &&
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grep -v "^+" test_err >err &&
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grep "commit-graph chain file too small" err
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)
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'
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test_expect_success 'verify across alternates' '
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git clone --no-hardlinks . verify-alt &&
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(
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cd verify-alt &&
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rm -rf $graphdir &&
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altdir="$(pwd)/../.git/objects" &&
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echo "$altdir" >.git/objects/info/alternates &&
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git commit-graph verify --object-dir="$altdir/" &&
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test_commit extra &&
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git commit-graph write --reachable --split &&
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tip_file=$graphdir/graph-$(tail -n 1 $graphdir/commit-graph-chain).graph &&
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corrupt_file "$tip_file" 1500 "\01" &&
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test_must_fail git commit-graph verify --shallow 2>test_err &&
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grep -v "^+" test_err >err &&
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test_grep "incorrect checksum" err
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)
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'
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test_expect_success 'reader bounds-checks base-graph chunk' '
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git clone --no-hardlinks . corrupt-base-chunk &&
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(
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cd corrupt-base-chunk &&
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tip_file=$graphdir/graph-$(tail -n 1 $graphdir/commit-graph-chain).graph &&
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corrupt_chunk_file "$tip_file" BASE clear 01020304 &&
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git -c core.commitGraph=false log >expect.out &&
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git -c core.commitGraph=true log >out 2>err &&
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test_cmp expect.out out &&
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grep "commit-graph base graphs chunk is too small" err
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)
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'
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test_expect_success 'add octopus merge' '
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git reset --hard commits/10 &&
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git merge commits/3 commits/4 &&
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git branch merge/octopus &&
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git commit-graph write --reachable --split &&
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git commit-graph verify --progress 2>err &&
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test_line_count = 1 err &&
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grep "Verifying commits in commit graph: 100% (18/18)" err &&
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test_grep ! warning err &&
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test_line_count = 3 $graphdir/commit-graph-chain
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'
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graph_git_behavior 'graph exists' merge/octopus commits/12
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test_expect_success 'split across alternate where alternate is not split' '
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git commit-graph write --reachable &&
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test_path_is_file .git/objects/info/commit-graph &&
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cp .git/objects/info/commit-graph . &&
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git clone --no-hardlinks . alt-split &&
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(
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cd alt-split &&
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rm -f .git/objects/info/commit-graph &&
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echo "$(pwd)"/../.git/objects >.git/objects/info/alternates &&
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test_commit 18 &&
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git commit-graph write --reachable --split &&
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test_line_count = 1 $graphdir/commit-graph-chain
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) &&
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test_cmp commit-graph .git/objects/info/commit-graph
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'
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test_expect_success '--split=no-merge always writes an incremental' '
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test_when_finished rm -rf a b &&
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rm -rf $graphdir $infodir/commit-graph &&
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git reset --hard commits/2 &&
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git rev-list HEAD~1 >a &&
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git rev-list HEAD >b &&
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git commit-graph write --split --stdin-commits <a &&
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git commit-graph write --split=no-merge --stdin-commits <b &&
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test_line_count = 2 $graphdir/commit-graph-chain
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'
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test_expect_success '--split=replace replaces the chain' '
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rm -rf $graphdir $infodir/commit-graph &&
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git reset --hard commits/3 &&
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git rev-list -1 HEAD~2 >a &&
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git rev-list -1 HEAD~1 >b &&
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git rev-list -1 HEAD >c &&
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git commit-graph write --split=no-merge --stdin-commits <a &&
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git commit-graph write --split=no-merge --stdin-commits <b &&
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git commit-graph write --split=no-merge --stdin-commits <c &&
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test_line_count = 3 $graphdir/commit-graph-chain &&
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git commit-graph write --stdin-commits --split=replace <b &&
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test_path_is_missing $infodir/commit-graph &&
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test_path_is_file $graphdir/commit-graph-chain &&
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ls $graphdir/graph-*.graph >graph-files &&
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test_line_count = 1 graph-files &&
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verify_chain_files_exist $graphdir &&
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graph_read_expect 2
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'
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|
|
test_expect_success ULIMIT_FILE_DESCRIPTORS 'handles file descriptor exhaustion' '
|
|
git init ulimit &&
|
|
(
|
|
cd ulimit &&
|
|
for i in $(test_seq 64)
|
|
do
|
|
test_commit $i &&
|
|
run_with_limited_open_files test_might_fail git commit-graph write \
|
|
--split=no-merge --reachable || return 1
|
|
done
|
|
)
|
|
'
|
|
|
|
while read mode modebits
|
|
do
|
|
test_expect_success POSIXPERM "split commit-graph respects core.sharedrepository $mode" '
|
|
rm -rf $graphdir $infodir/commit-graph &&
|
|
git reset --hard commits/1 &&
|
|
test_config core.sharedrepository "$mode" &&
|
|
git commit-graph write --split --reachable &&
|
|
ls $graphdir/graph-*.graph >graph-files &&
|
|
test_line_count = 1 graph-files &&
|
|
echo "$modebits" >expect &&
|
|
test_modebits $graphdir/graph-*.graph >actual &&
|
|
test_cmp expect actual &&
|
|
test_modebits $graphdir/commit-graph-chain >actual &&
|
|
test_cmp expect actual
|
|
'
|
|
done <<\EOF
|
|
0666 -r--r--r--
|
|
0600 -r--------
|
|
EOF
|
|
|
|
test_expect_success '--split=replace with partial Bloom data' '
|
|
rm -rf $graphdir $infodir/commit-graph &&
|
|
git reset --hard commits/3 &&
|
|
git rev-list -1 HEAD~2 >a &&
|
|
git rev-list -1 HEAD~1 >b &&
|
|
git commit-graph write --split=no-merge --stdin-commits --changed-paths <a &&
|
|
git commit-graph write --split=no-merge --stdin-commits <b &&
|
|
git commit-graph write --split=replace --stdin-commits --changed-paths <c &&
|
|
ls $graphdir/graph-*.graph >graph-files &&
|
|
test_line_count = 1 graph-files &&
|
|
verify_chain_files_exist $graphdir
|
|
'
|
|
|
|
test_expect_success 'prevent regression for duplicate commits across layers' '
|
|
git init dup &&
|
|
git -C dup commit --allow-empty -m one &&
|
|
git -C dup -c core.commitGraph=false commit-graph write --split=no-merge --reachable 2>err &&
|
|
test_grep "attempting to write a commit-graph" err &&
|
|
git -C dup commit-graph write --split=no-merge --reachable &&
|
|
git -C dup commit --allow-empty -m two &&
|
|
git -C dup commit-graph write --split=no-merge --reachable &&
|
|
git -C dup commit --allow-empty -m three &&
|
|
git -C dup commit-graph write --split --reachable &&
|
|
git -C dup commit-graph verify
|
|
'
|
|
|
|
NUM_FIRST_LAYER_COMMITS=64
|
|
NUM_SECOND_LAYER_COMMITS=16
|
|
NUM_THIRD_LAYER_COMMITS=7
|
|
NUM_FOURTH_LAYER_COMMITS=8
|
|
NUM_FIFTH_LAYER_COMMITS=16
|
|
SECOND_LAYER_SEQUENCE_START=$(($NUM_FIRST_LAYER_COMMITS + 1))
|
|
SECOND_LAYER_SEQUENCE_END=$(($SECOND_LAYER_SEQUENCE_START + $NUM_SECOND_LAYER_COMMITS - 1))
|
|
THIRD_LAYER_SEQUENCE_START=$(($SECOND_LAYER_SEQUENCE_END + 1))
|
|
THIRD_LAYER_SEQUENCE_END=$(($THIRD_LAYER_SEQUENCE_START + $NUM_THIRD_LAYER_COMMITS - 1))
|
|
FOURTH_LAYER_SEQUENCE_START=$(($THIRD_LAYER_SEQUENCE_END + 1))
|
|
FOURTH_LAYER_SEQUENCE_END=$(($FOURTH_LAYER_SEQUENCE_START + $NUM_FOURTH_LAYER_COMMITS - 1))
|
|
FIFTH_LAYER_SEQUENCE_START=$(($FOURTH_LAYER_SEQUENCE_END + 1))
|
|
FIFTH_LAYER_SEQUENCE_END=$(($FIFTH_LAYER_SEQUENCE_START + $NUM_FIFTH_LAYER_COMMITS - 1))
|
|
|
|
# Current split graph chain:
|
|
#
|
|
# 16 commits (No GDAT)
|
|
# ------------------------
|
|
# 64 commits (GDAT)
|
|
#
|
|
test_expect_success 'setup repo for mixed generation commit-graph-chain' '
|
|
graphdir=".git/objects/info/commit-graphs" &&
|
|
test_oid_cache <<-EOF &&
|
|
oid_version sha1:1
|
|
oid_version sha256:2
|
|
EOF
|
|
git init mixed &&
|
|
(
|
|
cd mixed &&
|
|
git config core.commitGraph true &&
|
|
git config gc.writeCommitGraph false &&
|
|
for i in $(test_seq $NUM_FIRST_LAYER_COMMITS)
|
|
do
|
|
test_commit $i &&
|
|
git branch commits/$i || return 1
|
|
done &&
|
|
git -c commitGraph.generationVersion=2 commit-graph write --reachable --split &&
|
|
graph_read_expect $NUM_FIRST_LAYER_COMMITS &&
|
|
test_line_count = 1 $graphdir/commit-graph-chain &&
|
|
for i in $(test_seq $SECOND_LAYER_SEQUENCE_START $SECOND_LAYER_SEQUENCE_END)
|
|
do
|
|
test_commit $i &&
|
|
git branch commits/$i || return 1
|
|
done &&
|
|
git -c commitGraph.generationVersion=1 commit-graph write --reachable --split=no-merge &&
|
|
test_line_count = 2 $graphdir/commit-graph-chain &&
|
|
test-tool read-graph >output &&
|
|
cat >expect <<-EOF &&
|
|
header: 43475048 1 $(test_oid oid_version) 4 1
|
|
num_commits: $NUM_SECOND_LAYER_COMMITS
|
|
chunks: oid_fanout oid_lookup commit_metadata
|
|
options:
|
|
EOF
|
|
test_cmp expect output &&
|
|
git commit-graph verify &&
|
|
cat $graphdir/commit-graph-chain
|
|
)
|
|
'
|
|
|
|
# The new layer will be added without generation data chunk as it was not
|
|
# present on the layer underneath it.
|
|
#
|
|
# 7 commits (No GDAT)
|
|
# ------------------------
|
|
# 16 commits (No GDAT)
|
|
# ------------------------
|
|
# 64 commits (GDAT)
|
|
#
|
|
test_expect_success 'do not write generation data chunk if not present on existing tip' '
|
|
git clone mixed mixed-no-gdat &&
|
|
(
|
|
cd mixed-no-gdat &&
|
|
for i in $(test_seq $THIRD_LAYER_SEQUENCE_START $THIRD_LAYER_SEQUENCE_END)
|
|
do
|
|
test_commit $i &&
|
|
git branch commits/$i || return 1
|
|
done &&
|
|
git commit-graph write --reachable --split=no-merge &&
|
|
test_line_count = 3 $graphdir/commit-graph-chain &&
|
|
test-tool read-graph >output &&
|
|
cat >expect <<-EOF &&
|
|
header: 43475048 1 $(test_oid oid_version) 4 2
|
|
num_commits: $NUM_THIRD_LAYER_COMMITS
|
|
chunks: oid_fanout oid_lookup commit_metadata
|
|
options:
|
|
EOF
|
|
test_cmp expect output &&
|
|
git commit-graph verify
|
|
)
|
|
'
|
|
|
|
# Number of commits in each layer of the split-commit graph before merge:
|
|
#
|
|
# 8 commits (No GDAT)
|
|
# ------------------------
|
|
# 7 commits (No GDAT)
|
|
# ------------------------
|
|
# 16 commits (No GDAT)
|
|
# ------------------------
|
|
# 64 commits (GDAT)
|
|
#
|
|
# The top two layers are merged and do not have generation data chunk as layer below them does
|
|
# not have generation data chunk.
|
|
#
|
|
# 15 commits (No GDAT)
|
|
# ------------------------
|
|
# 16 commits (No GDAT)
|
|
# ------------------------
|
|
# 64 commits (GDAT)
|
|
#
|
|
test_expect_success 'do not write generation data chunk if the topmost remaining layer does not have generation data chunk' '
|
|
git clone mixed-no-gdat mixed-merge-no-gdat &&
|
|
(
|
|
cd mixed-merge-no-gdat &&
|
|
for i in $(test_seq $FOURTH_LAYER_SEQUENCE_START $FOURTH_LAYER_SEQUENCE_END)
|
|
do
|
|
test_commit $i &&
|
|
git branch commits/$i || return 1
|
|
done &&
|
|
git commit-graph write --reachable --split --size-multiple 1 &&
|
|
test_line_count = 3 $graphdir/commit-graph-chain &&
|
|
test-tool read-graph >output &&
|
|
cat >expect <<-EOF &&
|
|
header: 43475048 1 $(test_oid oid_version) 4 2
|
|
num_commits: $(($NUM_THIRD_LAYER_COMMITS + $NUM_FOURTH_LAYER_COMMITS))
|
|
chunks: oid_fanout oid_lookup commit_metadata
|
|
options:
|
|
EOF
|
|
test_cmp expect output &&
|
|
git commit-graph verify
|
|
)
|
|
'
|
|
|
|
# Number of commits in each layer of the split-commit graph before merge:
|
|
#
|
|
# 16 commits (No GDAT)
|
|
# ------------------------
|
|
# 15 commits (No GDAT)
|
|
# ------------------------
|
|
# 16 commits (No GDAT)
|
|
# ------------------------
|
|
# 64 commits (GDAT)
|
|
#
|
|
# The top three layers are merged and has generation data chunk as the topmost remaining layer
|
|
# has generation data chunk.
|
|
#
|
|
# 47 commits (GDAT)
|
|
# ------------------------
|
|
# 64 commits (GDAT)
|
|
#
|
|
test_expect_success 'write generation data chunk if topmost remaining layer has generation data chunk' '
|
|
git clone mixed-merge-no-gdat mixed-merge-gdat &&
|
|
(
|
|
cd mixed-merge-gdat &&
|
|
for i in $(test_seq $FIFTH_LAYER_SEQUENCE_START $FIFTH_LAYER_SEQUENCE_END)
|
|
do
|
|
test_commit $i &&
|
|
git branch commits/$i || return 1
|
|
done &&
|
|
git commit-graph write --reachable --split --size-multiple 1 &&
|
|
test_line_count = 2 $graphdir/commit-graph-chain &&
|
|
test-tool read-graph >output &&
|
|
cat >expect <<-EOF &&
|
|
header: 43475048 1 $(test_oid oid_version) 5 1
|
|
num_commits: $(($NUM_SECOND_LAYER_COMMITS + $NUM_THIRD_LAYER_COMMITS + $NUM_FOURTH_LAYER_COMMITS + $NUM_FIFTH_LAYER_COMMITS))
|
|
chunks: oid_fanout oid_lookup commit_metadata generation_data
|
|
options: read_generation_data
|
|
EOF
|
|
test_cmp expect output
|
|
)
|
|
'
|
|
|
|
test_expect_success 'write generation data chunk when commit-graph chain is replaced' '
|
|
git clone mixed mixed-replace &&
|
|
(
|
|
cd mixed-replace &&
|
|
git commit-graph write --reachable --split=replace &&
|
|
test_path_is_file $graphdir/commit-graph-chain &&
|
|
test_line_count = 1 $graphdir/commit-graph-chain &&
|
|
verify_chain_files_exist $graphdir &&
|
|
graph_read_expect $(($NUM_FIRST_LAYER_COMMITS + $NUM_SECOND_LAYER_COMMITS)) &&
|
|
git commit-graph verify
|
|
)
|
|
'
|
|
|
|
test_expect_success 'temporary graph layer is discarded upon failure' '
|
|
git init layer-discard &&
|
|
(
|
|
cd layer-discard &&
|
|
|
|
test_commit A &&
|
|
test_commit B &&
|
|
|
|
# Intentionally remove commit "A" from the object store
|
|
# so that the commit-graph machinery fails to parse the
|
|
# parents of "B".
|
|
#
|
|
# This takes place after the commit-graph machinery has
|
|
# initialized a new temporary file to store the contents
|
|
# of the new graph layer, so will allow us to ensure
|
|
# that the temporary file is discarded upon failure.
|
|
rm $objdir/$(test_oid_to_path $(git rev-parse HEAD^)) &&
|
|
|
|
test_must_fail git commit-graph write --reachable --split &&
|
|
test_dir_is_empty $graphdir
|
|
)
|
|
'
|
|
|
|
test_done
|