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jj run executes commands across changes

Introduced 2026-07-02 · score 0.95

HOW TO USE IT

When you need to check or fix code across selected changes, run `jj run` with the command after `--`; it checks out each revision in an isolated working copy and amends it with resulting changes, rebasing descendants by default. Specify revisions with `-r`/`--revision` or use the configured `revsets.run` selection.

jj run -- cargo check --all-features
jj run -- cargo fix
jj run -r <REVSET> -- <COMMAND> [ARGS...]

WHY THIS HELPS

Check or fix code across a set of changes, including changes that may update files or produce conflicts.

REQUIREMENTS AND LIMITATIONS

  • Version: v0.43.0
  • COMMAND [ARGS...] (required): Command and arguments to run across each selected revision; use `--` to pass arguments that start with `-`.
  • -r, --revision <REVSETS> (alias: --revisions): Select revisions to change. If omitted, `revsets.run` config determines the selection.
  • -j, --jobs <N>: Set parallel process count; overrides `run.jobs`, defaulting to 1 when neither is set.
  • --root: Run from each revision's working-copy root instead of the subdirectory where `jj run` was invoked.
  • --clean: Delete each reused working copy before running; each revision starts from a freshly checked-out tree.
  • --restore-descendants: Preserve descendants' content when rebasing them; default behavior rebases descendants and propagates the diff.

FIRST-PARTY EVIDENCE

Check the installed version and the source before using it. Entry JSON

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