This patch set adds the ability to ignore a set of commits and their changes when blaming. This can be used to ignore a commit deemed 'not interesting,' such as reformatting. The main change to this patchset from previous versions is the addition of Michael's fuzzy fingerprinting logic. It's added in its own commit, and integrated into the more generic blame-ignore logic in the final commit of the patch set. v6 -> v7 v6: https://public-inbox.org/git/20190410162409.117264-1-brho@xxxxxxxxxx - Split the init_skiplist commit into two commits: "change variable names" then "move the function". - Fixed the test's usage of grep, from grep "\+" to grep -E "+". - Fixed comments related to fsck.skipList, added them to config/blame.txt - A line in the blame output is either "ignored" or "unblamable", not both. - Changed the way we mark lines. In particular, we don't zero-out the hash anymore for unblamables, since all zeros already had a meaning. We also distinguish between ignored and unblamable. Here's the new style: ? for ignored * for unblamable Both of those markings are controlled by config vars; the discussion on the list shows that no default style works for everyone: if blame.markIgnoredLines Line was attributed to a commit that was not the most recent to change it (i.e. the ignored commit) and will be marked with '?'. Lines touched by an ignored commit that we could not blame on another are unmarked. if blame.markUnblamableLines Lines touched by an ignored commit that we could not blame on another are marked with *. I wanted to differentiate between Ignored and Unblamable, so a single ? isn't enough. - Added Michael's fuzzy fingerprinting code. - We guess_line_blames() for an entire chunk, instead of per-blame entry. A diff chunk can be made up of more than one blame_entry, which made the job of the heuristic unnecessarily difficult. - Rebased onto master. v5 -> v6 v5: https://public-inbox.org/git/20190403160207.149174-1-brho@xxxxxxxxxx/ - The "guess" heuristic can now look anywhere in the parent file for a matching line, instead of just looking in the parent chunk. The chunks passed to blame_chunk() are smaller than you'd expect: they are just adjacent '-' and '+' sections. Any diff 'context' is a chunk boundary. - Fixed the parent_len calculation. I had been basing it off of e->num_lines, and treating the blame entry as if it was the target chunk, but the individual blame entries are subsets of the chunk. I just pass the parent chunk info all the way through now. - Use Michael's newest fingerprinting code, which is a large speedup. - Made a config option to zero the hash for an ignored line when the heuristic could not find a line in the parent to blame. Previously, this was always 'on'. - Moved the for loop variable declarations out of the for (). - Rebased on master. v4 -> v5 v4: https://public-inbox.org/git/20190226170648.211847-1-brho@xxxxxxxxxx/ - Changed the handling of blame_entries from ignored commits so that you can use any algorithm you want to map lines from the diff chunk to different parts of the parent commit. - fill_origin_blob() optionally can track the offsets of the start of every line, similar to what we do in the scoreboard for the final file. This can be used by the matching algorithm. It has no effect if you are not ignoring commits. - RFC of a fuzzy/fingerprinting heuristic, based on Michael Platings RFC at https://public-inbox.org/git/20190324235020.49706-2-michael@xxxxxxxxx/ - Made the tests that detect unblamable entries more resilient to different heuristics. - Fixed a few bugs: - tests were not grepping the line number from --line-porcelain correctly. - In the old version, when I passed the "upper" part of the blame entry to the target and marked unblamable, the suspect was incorrectly marked as the parent. The s_lno was also in the parent's address space. v3 -> v4 v3: https://public-inbox.org/git/20190212222722.240676-1-brho@xxxxxxxxxx/ - Cleaned up the tests, especially removing usage of sed -i. - Squashed the 'tests' commit into the other blame commits. Let me know if you'd like further squashing. v2 -> v3 v2: https://public-inbox.org/git/20190117202919.157326-1-brho@xxxxxxxxxx/ - SHA-1 -> "object name", and fixed other comments - Changed error string for oidset_parse_file() - Adjusted existing fsck tests to handle those string changes - Return hash of all zeros for lines we know we cannot identify - Allow repeated options for blame.ignoreRevsFile and --ignore-revs-file. An empty file name resets the list. Config options are parsed before the command line options. - Rebased to master - Added regression tests v1 -> v2 v1: https://public-inbox.org/git/20190107213013.231514-1-brho@xxxxxxxxxx/ - extracted the skiplist from fsck to avoid duplicating code - overhauled the interface and options - split out markIgnoredFiles - handled merges Barret Rhoden (7): fsck: rename and touch up init_skiplist() Move oidset_parse_file() to oidset.c blame: use a helper function in blame_chunk() blame: add the ability to ignore commits and their changes blame: add config options for the output of ignored or unblamable lines blame: optionally track line fingerprints during fill_blame_origin() blame: use the fingerprint heuristic to match ignored lines Michael Platings (1): blame: add a fingerprint heuristic to match ignored lines Documentation/blame-options.txt | 19 + Documentation/config/blame.txt | 16 + Documentation/git-blame.txt | 1 + blame.c | 1024 +++++++++++++++++++++++++++++-- blame.h | 6 + builtin/blame.c | 56 ++ fsck.c | 37 +- oidset.c | 35 ++ oidset.h | 8 + t/t5504-fetch-receive-strict.sh | 14 +- t/t8013-blame-ignore-revs.sh | 274 +++++++++ t/t8014-blame-ignore-fuzzy.sh | 432 +++++++++++++ 12 files changed, 1823 insertions(+), 99 deletions(-) create mode 100755 t/t8013-blame-ignore-revs.sh create mode 100755 t/t8014-blame-ignore-fuzzy.sh -- 2.21.0.1020.gf2820cf01a-goog
