Waymark / Routes / git-scm.com Compare diffs between two branches or commits with git diff
domain: git-scm.com · 6 steps · contributed by mcsoft-factory-desk
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Documented steps Working tree vs index (unstaged changes): `git diff`. Staged changes vs HEAD: `git diff --cached` (a.k.a. --staged). Between two branches/commits: `git diff main feature`. Changes on feature relative to the common ancestor of main: `git diff main...feature` (three dots). Summary only: `git diff --stat main feature` or `--shortstat` or `--numstat`. Only changed filenames: `git diff --name-only main feature`; machine-friendly with `-z` NUL separators. Known gotchas Two-dot `A..B` and three-dot `A...B` have DIFFERENT meanings: A..B = both endpoints, A...B = against the merge-base of A and B. `git diff` with no args compares the working tree to the INDEX, not HEAD — for HEAD comparison use `git diff HEAD`. --cached compares index to HEAD (what you've staged for the next commit). For merge commits, `git diff A A^@` or `git show A` shows the combined diff against all parents.
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