3b0199d4c3
The 'read_generation_data' member of 'struct commit_graph' was introduced by1fdc383c5(commit-graph: use generation v2 only if entire chain does, 2021-01-16). The intention was to avoid using corrected commit dates if not all layers of a commit-graph had that data stored. The logic in validate_mixed_generation_chain() at that point incorrectly initialized read_generation_data to 1 if and only if the tip commit-graph contained the Corrected Commit Date chunk. This was "fixed" in448a39e65(commit-graph: validate layers for generation data, 2021-02-02) to validate that read_generation_data was either non-zero for all layers, or it would set read_generation_data to zero for all layers. The problem here is that read_generation_data is not initialized to be non-zero anywhere! This change initializes read_generation_data immediately after the chunk is parsed, so each layer will have its value present as soon as possible. The read_generation_data member is used in fill_commit_graph_info() to determine if we should use the corrected commit date or the topological levels stored in the Commit Data chunk. Due to this bug, all previous versions of Git were defaulting to topological levels in all cases! This can be measured with some performance tests. Using the Linux kernel as a testbed, I generated a complete commit-graph containing corrected commit dates and tested the 'new' version against the previous, 'old' version. First, rev-list with --topo-order demonstrates a 26% improvement using corrected commit dates: hyperfine \ -n "old" "$OLD_GIT rev-list --topo-order -1000 v3.6" \ -n "new" "$NEW_GIT rev-list --topo-order -1000 v3.6" \ --warmup=10 Benchmark 1: old Time (mean ± σ): 57.1 ms ± 3.1 ms Range (min … max): 52.9 ms … 62.0 ms 55 runs Benchmark 2: new Time (mean ± σ): 45.5 ms ± 3.3 ms Range (min … max): 39.9 ms … 51.7 ms 59 runs Summary 'new' ran 1.26 ± 0.11 times faster than 'old' These performance improvements are due to the algorithmic improvements given by walking fewer commits due to the higher cutoffs from corrected commit dates. However, this comes at a cost. The additional I/O cost of parsing the corrected commit dates is visible in case of merge-base commands that do not reduce the overall number of walked commits. hyperfine \ -n "old" "$OLD_GIT merge-base v4.8 v4.9" \ -n "new" "$NEW_GIT merge-base v4.8 v4.9" \ --warmup=10 Benchmark 1: old Time (mean ± σ): 110.4 ms ± 6.4 ms Range (min … max): 96.0 ms … 118.3 ms 25 runs Benchmark 2: new Time (mean ± σ): 150.7 ms ± 1.1 ms Range (min … max): 149.3 ms … 153.4 ms 19 runs Summary 'old' ran 1.36 ± 0.08 times faster than 'new' Performance issues like this are what motivated702110aac(commit-graph: use config to specify generation type, 2021-02-25). In the future, we could fix this performance problem by inserting the corrected commit date offsets into the Commit Date chunk instead of having that data in an extra chunk. Signed-off-by: Derrick Stolee <derrickstolee@github.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
815 lines
25 KiB
Bash
Executable File
815 lines
25 KiB
Bash
Executable File
#!/bin/sh
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test_description='commit graph'
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. ./test-lib.sh
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GIT_TEST_COMMIT_GRAPH_CHANGED_PATHS=0
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test_expect_success 'usage' '
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test_expect_code 129 git commit-graph write blah 2>err &&
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test_expect_code 129 git commit-graph write verify
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'
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test_expect_success 'usage shown without sub-command' '
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test_expect_code 129 git commit-graph 2>err &&
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! grep error: err
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'
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test_expect_success 'usage shown with an error on unknown sub-command' '
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cat >expect <<-\EOF &&
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error: unrecognized subcommand: unknown
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EOF
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test_expect_code 129 git commit-graph unknown 2>stderr &&
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grep error stderr >actual &&
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test_cmp expect actual
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'
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test_expect_success 'setup full repo' '
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mkdir full &&
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cd "$TRASH_DIRECTORY/full" &&
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git init &&
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git config core.commitGraph true &&
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objdir=".git/objects"
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'
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test_expect_success POSIXPERM 'tweak umask for modebit tests' '
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umask 022
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'
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test_expect_success 'verify graph with no graph file' '
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cd "$TRASH_DIRECTORY/full" &&
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git commit-graph verify
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'
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test_expect_success 'write graph with no packs' '
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cd "$TRASH_DIRECTORY/full" &&
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git commit-graph write --object-dir $objdir &&
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test_path_is_missing $objdir/info/commit-graph
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'
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test_expect_success 'exit with correct error on bad input to --stdin-packs' '
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cd "$TRASH_DIRECTORY/full" &&
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echo doesnotexist >in &&
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test_expect_code 1 git commit-graph write --stdin-packs <in 2>stderr &&
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test_i18ngrep "error adding pack" stderr
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'
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test_expect_success 'create commits and repack' '
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cd "$TRASH_DIRECTORY/full" &&
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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 repack
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'
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. "$TEST_DIRECTORY"/lib-commit-graph.sh
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graph_git_behavior 'no graph' full commits/3 commits/1
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test_expect_success 'exit with correct error on bad input to --stdin-commits' '
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cd "$TRASH_DIRECTORY/full" &&
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# invalid, non-hex OID
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echo HEAD >in &&
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test_expect_code 1 git commit-graph write --stdin-commits <in 2>stderr &&
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test_i18ngrep "unexpected non-hex object ID: HEAD" stderr &&
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# non-existent OID
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echo $ZERO_OID >in &&
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test_expect_code 1 git commit-graph write --stdin-commits <in 2>stderr &&
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test_i18ngrep "invalid object" stderr &&
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# valid commit and tree OID
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git rev-parse HEAD HEAD^{tree} >in &&
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git commit-graph write --stdin-commits <in &&
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graph_read_expect 3 generation_data
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'
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test_expect_success 'write graph' '
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cd "$TRASH_DIRECTORY/full" &&
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git commit-graph write &&
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test_path_is_file $objdir/info/commit-graph &&
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graph_read_expect "3" generation_data
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'
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test_expect_success POSIXPERM 'write graph has correct permissions' '
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test_path_is_file $objdir/info/commit-graph &&
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echo "-r--r--r--" >expect &&
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test_modebits $objdir/info/commit-graph >actual &&
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test_cmp expect actual
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'
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graph_git_behavior 'graph exists' full commits/3 commits/1
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test_expect_success 'Add more commits' '
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cd "$TRASH_DIRECTORY/full" &&
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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 7)
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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 reset --hard commits/3 &&
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git merge commits/5 commits/7 &&
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git branch merge/3 &&
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git repack
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'
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test_expect_success 'commit-graph write progress off for redirected stderr' '
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cd "$TRASH_DIRECTORY/full" &&
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git commit-graph write 2>err &&
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test_must_be_empty err
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'
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test_expect_success 'commit-graph write force progress on for stderr' '
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cd "$TRASH_DIRECTORY/full" &&
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GIT_PROGRESS_DELAY=0 git commit-graph write --progress 2>err &&
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test_file_not_empty err
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'
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test_expect_success 'commit-graph write with the --no-progress option' '
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cd "$TRASH_DIRECTORY/full" &&
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git commit-graph write --no-progress 2>err &&
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test_must_be_empty err
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'
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test_expect_success 'commit-graph write --stdin-commits progress off for redirected stderr' '
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cd "$TRASH_DIRECTORY/full" &&
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git rev-parse commits/5 >in &&
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git commit-graph write --stdin-commits <in 2>err &&
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test_must_be_empty err
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'
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test_expect_success 'commit-graph write --stdin-commits force progress on for stderr' '
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cd "$TRASH_DIRECTORY/full" &&
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git rev-parse commits/5 >in &&
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GIT_PROGRESS_DELAY=0 git commit-graph write --stdin-commits --progress <in 2>err &&
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test_i18ngrep "Collecting commits from input" err
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'
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test_expect_success 'commit-graph write --stdin-commits with the --no-progress option' '
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cd "$TRASH_DIRECTORY/full" &&
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git rev-parse commits/5 >in &&
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git commit-graph write --stdin-commits --no-progress <in 2>err &&
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test_must_be_empty err
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'
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test_expect_success 'commit-graph verify progress off for redirected stderr' '
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cd "$TRASH_DIRECTORY/full" &&
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git commit-graph verify 2>err &&
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test_must_be_empty err
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'
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test_expect_success 'commit-graph verify force progress on for stderr' '
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cd "$TRASH_DIRECTORY/full" &&
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GIT_PROGRESS_DELAY=0 git commit-graph verify --progress 2>err &&
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test_file_not_empty err
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'
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test_expect_success 'commit-graph verify with the --no-progress option' '
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cd "$TRASH_DIRECTORY/full" &&
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git commit-graph verify --no-progress 2>err &&
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test_must_be_empty err
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'
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# Current graph structure:
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#
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# __M3___
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# / | \
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# 3 M1 5 M2 7
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# |/ \|/ \|
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# 2 4 6
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# |___/____/
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# 1
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test_expect_success 'write graph with merges' '
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cd "$TRASH_DIRECTORY/full" &&
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git commit-graph write &&
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test_path_is_file $objdir/info/commit-graph &&
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graph_read_expect "10" "generation_data extra_edges"
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'
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graph_git_behavior 'merge 1 vs 2' full merge/1 merge/2
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graph_git_behavior 'merge 1 vs 3' full merge/1 merge/3
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graph_git_behavior 'merge 2 vs 3' full merge/2 merge/3
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test_expect_success 'Add one more commit' '
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cd "$TRASH_DIRECTORY/full" &&
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test_commit 8 &&
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git branch commits/8 &&
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ls $objdir/pack | grep idx >existing-idx &&
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git repack &&
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ls $objdir/pack| grep idx | grep -v -f existing-idx >new-idx
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'
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# Current graph structure:
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#
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# 8
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# |
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# __M3___
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# / | \
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# 3 M1 5 M2 7
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# |/ \|/ \|
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# 2 4 6
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# |___/____/
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# 1
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graph_git_behavior 'mixed mode, commit 8 vs merge 1' full commits/8 merge/1
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graph_git_behavior 'mixed mode, commit 8 vs merge 2' full commits/8 merge/2
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test_expect_success 'write graph with new commit' '
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cd "$TRASH_DIRECTORY/full" &&
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git commit-graph write &&
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test_path_is_file $objdir/info/commit-graph &&
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graph_read_expect "11" "generation_data extra_edges"
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'
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graph_git_behavior 'full graph, commit 8 vs merge 1' full commits/8 merge/1
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graph_git_behavior 'full graph, commit 8 vs merge 2' full commits/8 merge/2
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test_expect_success 'write graph with nothing new' '
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cd "$TRASH_DIRECTORY/full" &&
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git commit-graph write &&
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test_path_is_file $objdir/info/commit-graph &&
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graph_read_expect "11" "generation_data extra_edges"
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'
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graph_git_behavior 'cleared graph, commit 8 vs merge 1' full commits/8 merge/1
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graph_git_behavior 'cleared graph, commit 8 vs merge 2' full commits/8 merge/2
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test_expect_success 'build graph from latest pack with closure' '
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cd "$TRASH_DIRECTORY/full" &&
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cat new-idx | git commit-graph write --stdin-packs &&
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test_path_is_file $objdir/info/commit-graph &&
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graph_read_expect "9" "generation_data extra_edges"
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'
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graph_git_behavior 'graph from pack, commit 8 vs merge 1' full commits/8 merge/1
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graph_git_behavior 'graph from pack, commit 8 vs merge 2' full commits/8 merge/2
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test_expect_success 'build graph from commits with closure' '
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cd "$TRASH_DIRECTORY/full" &&
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git tag -a -m "merge" tag/merge merge/2 &&
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git rev-parse tag/merge >commits-in &&
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git rev-parse merge/1 >>commits-in &&
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cat commits-in | git commit-graph write --stdin-commits &&
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test_path_is_file $objdir/info/commit-graph &&
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graph_read_expect "6" "generation_data"
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'
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graph_git_behavior 'graph from commits, commit 8 vs merge 1' full commits/8 merge/1
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graph_git_behavior 'graph from commits, commit 8 vs merge 2' full commits/8 merge/2
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test_expect_success 'build graph from commits with append' '
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cd "$TRASH_DIRECTORY/full" &&
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git rev-parse merge/3 | git commit-graph write --stdin-commits --append &&
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test_path_is_file $objdir/info/commit-graph &&
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graph_read_expect "10" "generation_data extra_edges"
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'
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graph_git_behavior 'append graph, commit 8 vs merge 1' full commits/8 merge/1
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graph_git_behavior 'append graph, commit 8 vs merge 2' full commits/8 merge/2
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test_expect_success 'build graph using --reachable' '
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cd "$TRASH_DIRECTORY/full" &&
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git commit-graph write --reachable &&
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test_path_is_file $objdir/info/commit-graph &&
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graph_read_expect "11" "generation_data extra_edges"
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'
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graph_git_behavior 'append graph, commit 8 vs merge 1' full commits/8 merge/1
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graph_git_behavior 'append graph, commit 8 vs merge 2' full commits/8 merge/2
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test_expect_success 'setup bare repo' '
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cd "$TRASH_DIRECTORY" &&
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git clone --bare --no-local full bare &&
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cd bare &&
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git config core.commitGraph true &&
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baredir="./objects"
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'
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graph_git_behavior 'bare repo, commit 8 vs merge 1' bare commits/8 merge/1
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graph_git_behavior 'bare repo, commit 8 vs merge 2' bare commits/8 merge/2
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test_expect_success 'write graph in bare repo' '
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cd "$TRASH_DIRECTORY/bare" &&
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git commit-graph write &&
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test_path_is_file $baredir/info/commit-graph &&
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graph_read_expect "11" "generation_data extra_edges"
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'
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graph_git_behavior 'bare repo with graph, commit 8 vs merge 1' bare commits/8 merge/1
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graph_git_behavior 'bare repo with graph, commit 8 vs merge 2' bare commits/8 merge/2
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test_expect_success 'perform fast-forward merge in full repo' '
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cd "$TRASH_DIRECTORY/full" &&
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git checkout -b merge-5-to-8 commits/5 &&
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git merge commits/8 &&
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git show-ref -s merge-5-to-8 >output &&
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git show-ref -s commits/8 >expect &&
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test_cmp expect output
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'
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test_expect_success 'check that gc computes commit-graph' '
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cd "$TRASH_DIRECTORY/full" &&
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git commit --allow-empty -m "blank" &&
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git commit-graph write --reachable &&
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cp $objdir/info/commit-graph commit-graph-before-gc &&
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git reset --hard HEAD~1 &&
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git config gc.writeCommitGraph true &&
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git gc &&
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cp $objdir/info/commit-graph commit-graph-after-gc &&
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! test_cmp_bin commit-graph-before-gc commit-graph-after-gc &&
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git commit-graph write --reachable &&
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test_cmp_bin commit-graph-after-gc $objdir/info/commit-graph
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'
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test_expect_success 'replace-objects invalidates commit-graph' '
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cd "$TRASH_DIRECTORY" &&
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test_when_finished rm -rf replace &&
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git clone full replace &&
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(
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cd replace &&
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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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git replace HEAD~1 HEAD~2 &&
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graph_git_two_modes "commit-graph verify" &&
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git -c core.commitGraph=false log >expect &&
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git -c core.commitGraph=true log >actual &&
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test_cmp expect actual &&
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git commit-graph write --reachable &&
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git -c core.commitGraph=false --no-replace-objects log >expect &&
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git -c core.commitGraph=true --no-replace-objects log >actual &&
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test_cmp expect actual &&
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rm -rf .git/objects/info/commit-graph &&
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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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)
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'
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test_expect_success 'commit grafts invalidate commit-graph' '
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cd "$TRASH_DIRECTORY" &&
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test_when_finished rm -rf graft &&
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git clone full graft &&
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(
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cd graft &&
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git commit-graph write --reachable &&
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test_path_is_file .git/objects/info/commit-graph &&
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H1=$(git rev-parse --verify HEAD~1) &&
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H3=$(git rev-parse --verify HEAD~3) &&
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echo "$H1 $H3" >.git/info/grafts &&
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git -c core.commitGraph=false log >expect &&
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git -c core.commitGraph=true log >actual &&
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test_cmp expect actual &&
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git commit-graph write --reachable &&
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git -c core.commitGraph=false --no-replace-objects log >expect &&
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git -c core.commitGraph=true --no-replace-objects log >actual &&
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test_cmp expect actual &&
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rm -rf .git/objects/info/commit-graph &&
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git commit-graph write --reachable &&
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test_path_is_missing .git/objects/info/commit-graph
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)
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'
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test_expect_success 'replace-objects invalidates commit-graph' '
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cd "$TRASH_DIRECTORY" &&
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test_when_finished rm -rf shallow &&
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git clone --depth 2 "file://$TRASH_DIRECTORY/full" shallow &&
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(
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cd shallow &&
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git commit-graph write --reachable &&
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test_path_is_missing .git/objects/info/commit-graph &&
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git fetch origin --unshallow &&
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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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)
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'
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test_expect_success 'warn on improper hash version' '
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git init --object-format=sha1 sha1 &&
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(
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cd sha1 &&
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test_commit 1 &&
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git commit-graph write --reachable &&
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mv .git/objects/info/commit-graph ../cg-sha1
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) &&
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git init --object-format=sha256 sha256 &&
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(
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cd sha256 &&
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test_commit 1 &&
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git commit-graph write --reachable &&
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mv .git/objects/info/commit-graph ../cg-sha256
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) &&
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(
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cd sha1 &&
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mv ../cg-sha256 .git/objects/info/commit-graph &&
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git log -1 2>err &&
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test_i18ngrep "commit-graph hash version 2 does not match version 1" err
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) &&
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(
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cd sha256 &&
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mv ../cg-sha1 .git/objects/info/commit-graph &&
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git log -1 2>err &&
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test_i18ngrep "commit-graph hash version 1 does not match version 2" err
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)
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'
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test_expect_success TIME_IS_64BIT,TIME_T_IS_64BIT 'lower layers have overflow chunk' '
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cd "$TRASH_DIRECTORY/full" &&
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UNIX_EPOCH_ZERO="@0 +0000" &&
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FUTURE_DATE="@4147483646 +0000" &&
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rm -f .git/objects/info/commit-graph &&
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test_commit --date "$FUTURE_DATE" future-1 &&
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test_commit --date "$UNIX_EPOCH_ZERO" old-1 &&
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|
git commit-graph write --reachable &&
|
|
test_commit --date "$FUTURE_DATE" future-2 &&
|
|
test_commit --date "$UNIX_EPOCH_ZERO" old-2 &&
|
|
git commit-graph write --reachable --split=no-merge &&
|
|
test_commit extra &&
|
|
git commit-graph write --reachable --split=no-merge &&
|
|
git commit-graph write --reachable &&
|
|
graph_read_expect 16 "generation_data generation_data_overflow extra_edges" &&
|
|
mv .git/objects/info/commit-graph commit-graph-upgraded &&
|
|
git commit-graph write --reachable &&
|
|
graph_read_expect 16 "generation_data generation_data_overflow extra_edges" &&
|
|
test_cmp .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' '
|
|
cd "$TRASH_DIRECTORY/full" &&
|
|
git rev-parse commits/8 | git -c commitGraph.generationVersion=1 commit-graph write --stdin-commits &&
|
|
git commit-graph verify >output &&
|
|
graph_read_expect 9 extra_edges 1
|
|
'
|
|
|
|
NUM_COMMITS=9
|
|
NUM_OCTOPUS_EDGES=2
|
|
HASH_LEN="$(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 + $HASH_LEN * 4 + 10))
|
|
GRAPH_COMMIT_DATA_OFFSET=$(($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 * $NUM_OCTOPUS_EDGES))
|
|
|
|
corrupt_graph_setup() {
|
|
cd "$TRASH_DIRECTORY/full" &&
|
|
test_when_finished mv commit-graph-backup $objdir/info/commit-graph &&
|
|
cp $objdir/info/commit-graph commit-graph-backup &&
|
|
chmod u+w $objdir/info/commit-graph
|
|
}
|
|
|
|
corrupt_graph_verify() {
|
|
grepstr=$1
|
|
test_must_fail git commit-graph verify 2>test_err &&
|
|
grep -v "^+" test_err >err &&
|
|
test_i18ngrep "$grepstr" err &&
|
|
if test "$2" != "no-copy"
|
|
then
|
|
cp $objdir/info/commit-graph commit-graph-pre-write-test
|
|
fi &&
|
|
git status --short &&
|
|
GIT_TEST_COMMIT_GRAPH_DIE_ON_PARSE=true git commit-graph write &&
|
|
chmod u+w $objdir/info/commit-graph &&
|
|
git 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 < $objdir/info/commit-graph) &&
|
|
zero_pos=${4:-${orig_size}} &&
|
|
printf "$data" | dd of="$objdir/info/commit-graph" bs=1 seek="$pos" conv=notrunc &&
|
|
dd of="$objdir/info/commit-graph" bs=1 seek="$zero_pos" if=/dev/null &&
|
|
test-tool genzeros $(($orig_size - $zero_pos)) >>"$objdir/info/commit-graph" &&
|
|
corrupt_graph_verify "$grepstr"
|
|
|
|
}
|
|
|
|
test_expect_success POSIXPERM,SANITY 'detect permission problem' '
|
|
corrupt_graph_setup &&
|
|
chmod 000 $objdir/info/commit-graph &&
|
|
corrupt_graph_verify "Could not open" "no-copy"
|
|
'
|
|
|
|
test_expect_success 'detect too small' '
|
|
corrupt_graph_setup &&
|
|
echo "a small graph" >$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" \
|
|
"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 'detect incorrect chunk count' '
|
|
corrupt_graph_and_verify $GRAPH_BYTE_CHUNK_COUNT "\377" \
|
|
"commit-graph file is too small to hold [0-9]* chunks" \
|
|
$GRAPH_CHUNK_LOOKUP_OFFSET
|
|
'
|
|
|
|
test_expect_success 'git fsck (checks commit-graph when config set to true)' '
|
|
cd "$TRASH_DIRECTORY/full" &&
|
|
git fsck &&
|
|
corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
|
|
"incorrect checksum" &&
|
|
cp commit-graph-pre-write-test $objdir/info/commit-graph &&
|
|
test_must_fail git -c core.commitGraph=true fsck
|
|
'
|
|
|
|
test_expect_success 'git fsck (ignores commit-graph when config set to false)' '
|
|
cd "$TRASH_DIRECTORY/full" &&
|
|
git fsck &&
|
|
corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
|
|
"incorrect checksum" &&
|
|
cp commit-graph-pre-write-test $objdir/info/commit-graph &&
|
|
git -c core.commitGraph=false fsck
|
|
'
|
|
|
|
test_expect_success 'git fsck (checks commit-graph when config unset)' '
|
|
cd "$TRASH_DIRECTORY/full" &&
|
|
test_when_finished "git config core.commitGraph true" &&
|
|
|
|
git fsck &&
|
|
corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
|
|
"incorrect checksum" &&
|
|
test_unconfig core.commitGraph &&
|
|
cp commit-graph-pre-write-test $objdir/info/commit-graph &&
|
|
test_must_fail git fsck
|
|
'
|
|
|
|
test_expect_success 'setup non-the_repository tests' '
|
|
rm -rf repo &&
|
|
git init repo &&
|
|
test_commit -C repo one &&
|
|
test_commit -C repo two &&
|
|
git -C repo config core.commitGraph true &&
|
|
git -C repo rev-parse two | \
|
|
git -C repo commit-graph write --stdin-commits
|
|
'
|
|
|
|
test_expect_success 'parse_commit_in_graph works for non-the_repository' '
|
|
test-tool repository parse_commit_in_graph \
|
|
repo/.git repo "$(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 $ZERO_OID
|
|
author whatever <whatever@example.com> 1234 -0000
|
|
committer whatever <whatever@example.com> 1234 -0000
|
|
|
|
broken commit
|
|
EOF
|
|
broken="$(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_i18ngrep "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 $ZERO_OID
|
|
author whatever <whatever@example.com> 1234 -0000
|
|
committer whatever <whatever@example.com> 1234 -0000
|
|
|
|
broken commit
|
|
EOF
|
|
broken="$(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_i18ngrep "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' '
|
|
objdir=".git/objects" &&
|
|
UNIX_EPOCH_ZERO="@0 +0000" &&
|
|
FUTURE_DATE="@2147483646 +0000" &&
|
|
cd "$TRASH_DIRECTORY" &&
|
|
mkdir repo &&
|
|
cd repo &&
|
|
git init &&
|
|
test_commit --date "$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_done
|