git/commit-graph.c, branch v2.27.0

Merge branch 'tb/shallow-cleanup'

2020-05-13T19:19:18Z

Code cleanup. * tb/shallow-cleanup: shallow: use struct 'shallow_lock' for additional safety shallow.h: document '{commit,rollback}_shallow_file' shallow: extract a header file for shallow-related functions commit: make 'commit_graft_pos' non-static

Merge branch 'jt/commit-graph-plug-memleak'

2020-05-08T21:25:05Z

Fix a leak noticed by fuzzer. * jt/commit-graph-plug-memleak: commit-graph: avoid memory leaks

Merge branch 'tb/commit-graph-perm-bits'

2020-05-05T21:54:28Z

Some of the files commit-graph subsystem keeps on disk did not correctly honor the core.sharedRepository settings and some were left read-write. * tb/commit-graph-perm-bits: commit-graph.c: make 'commit-graph-chain's read-only commit-graph.c: ensure graph layers respect core.sharedRepository commit-graph.c: write non-split graphs as read-only lockfile.c: introduce 'hold_lock_file_for_update_mode' tempfile.c: introduce 'create_tempfile_mode'

commit-graph: avoid memory leaks

2020-05-04T21:08:38Z

A fuzzer running on the entry point provided by fuzz-commit-graph.c revealed a memory leak when parse_commit_graph() creates a struct bloom_filter_settings and then returns early due to error. Fix that error by always freeing that struct first (if it exists) before returning early due to error. While making that change, I also noticed another possible memory leak - when the BLOOMDATA chunk is provided but not BLOOMINDEXES. Also fix that error. Signed-off-by: Jonathan Tan Reviewed-by: Derrick Stolee Signed-off-by: Junio C Hamano

Merge branch 'ds/blame-on-bloom'

2020-05-01T20:39:54Z

"git blame" learns to take advantage of the "changed-paths" Bloom filter stored in the commit-graph file. * ds/blame-on-bloom: test-bloom: check that we have expected arguments test-bloom: fix some whitespace issues blame: drop unused parameter from maybe_changed_path blame: use changed-path Bloom filters tests: write commit-graph with Bloom filters revision: complicated pathspecs disable filters

Merge branch 'gs/commit-graph-path-filter'

2020-05-01T20:39:53Z

Introduce an extension to the commit-graph to make it efficient to check for the paths that were modified at each commit using Bloom filters. * gs/commit-graph-path-filter: bloom: ignore renames when computing changed paths commit-graph: add GIT_TEST_COMMIT_GRAPH_CHANGED_PATHS test flag t4216: add end to end tests for git log with Bloom filters revision.c: add trace2 stats around Bloom filter usage revision.c: use Bloom filters to speed up path based revision walks commit-graph: add --changed-paths option to write subcommand commit-graph: reuse existing Bloom filters during write commit-graph: write Bloom filters to commit graph file commit-graph: examine commits by generation number commit-graph: examine changed-path objects in pack order commit-graph: compute Bloom filters for changed paths diff: halt tree-diff early after max_changes bloom.c: core Bloom filter implementation for changed paths. bloom.c: introduce core Bloom filter constructs bloom.c: add the murmur3 hash implementation commit-graph: define and use MAX_NUM_CHUNKS

Merge branch 'tb/commit-graph-fd-exhaustion-fix'

2020-05-01T20:39:53Z

The commit-graph code exhausted file descriptors easily when it does not have to. * tb/commit-graph-fd-exhaustion-fix: commit-graph: close descriptors after mmap commit-graph.c: gracefully handle file descriptor exhaustion t/test-lib.sh: make ULIMIT_FILE_DESCRIPTORS available to tests commit-graph.c: don't use discarded graph_name in error

Merge branch 'tb/commit-graph-split-strategy'

2020-05-01T20:39:52Z

"git commit-graph write" learned different ways to write out split files. * tb/commit-graph-split-strategy: Revert "commit-graph.c: introduce '--[no-]check-oids'" commit-graph.c: introduce '--[no-]check-oids' commit-graph.h: replace 'commit_hex' with 'commits' oidset: introduce 'oidset_size' builtin/commit-graph.c: introduce split strategy 'replace' builtin/commit-graph.c: introduce split strategy 'no-merge' builtin/commit-graph.c: support for '--split[=]' t/helper/test-read-graph.c: support commit-graph chains

shallow: extract a header file for shallow-related functions

2020-04-30T21:19:13Z

There are many functions in commit.h that are more related to shallow repositories than they are to any sort of generic commit machinery. Likely this began when there were only a few shallow-related functions, and commit.h seemed a reasonable enough place to put them. But, now there are a good number of shallow-related functions, and placing them all in 'commit.h' doesn't make sense. This patch extracts a 'shallow.h', which takes all of the declarations from 'commit.h' for functions which already exist in 'shallow.c'. We will bring the remaining shallow-related functions defined in 'commit.c' in a subsequent patch. For now, move only the ones that already are implemented in 'shallow.c', and update the necessary includes. Signed-off-by: Taylor Blau Signed-off-by: Junio C Hamano

Revert "commit-graph.c: introduce '--[no-]check-oids'"

2020-04-29T19:44:40Z

This reverts commit 7a9ce0269bc0f4ef230f930b3910b70ac3142552, which has not yet gained consensus.