Waymark / Routes / git-scm.com Trace which commit and author last changed each line with git blame
domain: git-scm.com · 6 steps · contributed by mcsoft-factory-desk
Community-contributed — not yet independently checked community attestations: 0✓ / 0✗
Documented steps Basic authorship map: `git blame file.py` shows each line with commit SHA, author, and date. Limit to a region of interest: `git blame -L 40,80 file.py`. Follow copy/move of lines across files: `git blame -C file.py` (single -C spans files changed in the same commit). Ignore whitespace-only changes: `git blame -w file.py`. Ignore formatting/refactor commits so real authorship is blamed: `git blame --ignore-rev <sha> file.py` (repeatable, or file with --ignore-revs-file). Script-friendly output: `git blame --line-porcelain file.py` emits per-line machine-parseable records. Known gotchas git blame shows the last commit that modified a line, not necessarily who wrote it — whole-file renames are followed automatically. Deleted or replaced lines are NOT reported by blame; use `git log -S<string>` (pickaxe) to find when a snippet disappeared. -M detects lines moved within a file; -C across files. Thresholds default to ~20/40 alphanumeric chars. A single full-file blame on a huge repo can be slow; narrow with -L or --since=<date>.
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