git-a-grip

Two things, from one package:

1. A set of pre-commit hooks you point your .pre-commit-config.yaml at.
2. gag, a CLI for managing pre-commit across all your repos — see what every project pins, and pin them all to the same rev.

1. The hooks

repos:
  - repo: https://github.com/dannybrown37/git-a-grip
    rev: v0.13.0
    hooks:
      - id: commitizen-early
      - id: ruff-check
      - id: ruff-format
      - id: mypy
      - id: embed-tree
      - id: embed-command
        args: ['--marker=help', '--command=mytool --help']
      - id: regen-file
        args: ['--command=python scripts/build_docs.py', '--file=docs/api.md']
      - id: biome
      - id: pytest
        args: [tests/, -q]
      - id: vitest
      - id: block-private-terms
      - id: zizmor

Nothing to install. Your project needs no ruff, cz or uv on PATH — pre-commit builds the env. (pytest, mypy, biome, eslint, tsc and vitest are the exceptions: they must run inside your project's environment, so they shell out to uv run / your package manager.)

Anything in args is passed through to the underlying tool. Pin your own tool version with additional_dependencies: [ruff==0.16.1].

biome, eslint, tsc and vitest run from the repo root unless you pass --dir=. If your JS lives in a subdirectory, its biome.json, eslint.config.mjs, tsconfig.json and node_modules resolve from there, so name it — and scope the hooks to match, since files outside that subdirectory are skipped anyway:

      - id: biome
        args: [--dir=web]
        files: ^web/
      - id: tsc
        args: [--dir=web]
        files: ^web/
      - id: vitest
        args: [--dir=web]
        files: ^web/

--runner= means different things either side of that list. For biome, eslint and tsc it names only the package manager the tool is run through; for vitest, pytest and mypy it replaces the command outright, because npm test chooses its own test tool and appending vitest run to it would be wrong — write --runner=npm test -- --run in full.

The embed-* hooks and regen-file are the exception: their args configure the hook itself (--marker=, --command=, --file=, --depth=, --exit=). One entry per block, each with its own --marker; regen-file takes --file= once per file its script writes. In all three the command is only ever the one you wrote down — nothing is discovered and run on its own, and there is no shell, so && is an argument rather than a second command. Scope them with files: so a block that changes twice a year isn't regenerated on every commit.

Full details on any hook, including the paste-ready config block:

gag hooks           # one line per hook
gag hooks pytest    # that one, in full
gag hooks --all

2. The gag CLI

uv tool install git-a-grip    # `gag` on PATH
uvx --from git-a-grip gag …   # or one-off

gag --help lists everything; gag <command> --help its options.

gag audit — what does every repo pin?

Walks your project directories, stops at each git working tree, and reports which hooks each one uses and at what rev — labelled (behind), (ahead), (unpinned) against the version you have installed. Third-party hooks and repo: local one-offs are listed too.

gag audit
gag audit ~/projects ~/work
gag audit --json | jq '.repos[] | select(.hooks == [])'

gag sync — pin them all to one rev

The other half. Dry run by default, one line per repo (old -> new).

gag sync                    # dry run against the installed version
gag sync --write            # apply it
gag sync --to v0.5.0
gag sync --latest --write
gag sync --repo https://github.com/gitleaks/gitleaks --latest

The rewrite is textual and touches only the rev: line, so your comments and formatting survive. Nothing is committed — changes land in each repo's working tree for you to review.

Without --to or --latest the target is the version you have installed, which is only a stand-in for the current release. So that run also asks the source for its newest tag and warns on stderr when your install is behind it:

sync: installed v0.7.0, but v0.8.0 is the newest tag at <repo>.
      Re-run with --latest to pin v0.8.0 instead, or upgrade git-a-grip.

The plan is still printed — the warning says the target may not be the one you want, not that the answer is useless. An unreachable remote skips the check silently, so gag sync still works offline.

gag privacy — the terms the block-private-terms hook blocks on

A secret scanner finds credentials. It cannot find the strings that are only sensitive because of who typed them — an employer, a client, an internal hostname, a relative's name. Those are yours, so they never live in the repo:

gag privacy                         # status, then pick an action
gag privacy add                     # prompts, echoing, so typos show
gag privacy add "acme corp"         # or as an argument, for scripts
gag privacy list                    # masked: `da******wn`
gag privacy list --reveal           # in full, when you mean it
gag privacy path                    # the file in use, for `$EDITOR "$(...)"`
gag privacy check some_file.py      # what the hook would flag, no commit
gag privacy check                   # or pick the file from the repo
gag privacy remove                  # pick from the terms you have
gag privacy remove "acme corp"

Anything it needs and wasn't given, it asks for — fzf when you have it, a numbered list when you don't (GAG_NO_FZF=1 forces the list). Every prompt has a flag that skips it, and an interactive run finishes by printing the one-liner you could have typed:

$ gag privacy remove
  1) acme corp
  2) dannybrown
remove: (numbers, comma-separated, blank to cancel) 1
Removed 1 from /home/you/.config/git-a-grip/privacy-terms

Next time, in one line:
  gag privacy remove 'acme corp'

Off a terminal nothing prompts: it names the argument that was missing and exits 2, so a CI job fails in a line instead of hanging until its timeout.

Terms are read from the first of these that exists: --terms-file=, $GAG_PRIVACY_TERMS_FILE, $XDG_CONFIG_HOME/git-a-grip/privacy-terms, then <repo>/.git/privacy-terms. The third is the one to use — one file, every repo on the machine covered. --repo writes to the fourth instead, for a term that belongs to one project and shouldn't follow you around; note that deleting that clone deletes the terms with it.

The file is line-delimited text, # comments allowed, and it is read literally — never sourced. gag privacy creates it 0600 in a 0700 directory and refuses to read one the rest of the machine can read: a terms file at 0644 leaves you believing you're covered while the terms sit in the open. A symlinked file is followed and judged at the far end, so keeping the real file in your dotfiles works.

Nothing here prints a term in full unless you ask. add reports a count, list masks, and the hook names the file and line but never the match — this output goes to scrollback and into CI logs.

gag hooks — the hook reference

The table above, in full, from your installed version. Colorized for the terminal, plain when piped. The block below is this repo's own embed-command hook keeping gag hooks output honest:

git-a-grip -- pre-commit hooks

Turn one on in .pre-commit-config.yaml:

repos:
  - repo: https://github.com/dannybrown37/git-a-grip
    rev: v0.13.0
    hooks:
      - id: <one of the below>
      - id: <...any number of others>

  biome                Lint and format with project's own Biome, re-staging fixes.
  block-private-terms  Block a commit adding one of your own private terms.
  commitizen-early     Reject a bad commit message before the slow hooks run.
  embed-command        Keep a command's output (`--help`) true in the README.
  embed-tree           Regenerate the README file tree, and re-stage it.
  eslint               Lint with the project's own eslint, re-staging fixes.
  mypy                 Type-check the project in its own environment.
  pytest               Run the repo's tests through its own environment.
  regen-file           Run a generator script, and re-stage what it rewrote.
  ruff-check           Lint with `ruff check --fix`, re-staging what it fixed.
  ruff-format          Format with `ruff format`, re-staging what it rewrote.
  tsc                  Type-check the project with the project's own tsc.
  vitest               Run the project's vitest suite once, never in watch mode.
  zizmor               Audit GitHub Actions workflows for the mistakes that leak.

gag hooks <id> for one in full, gag hooks --all for all of them.

Running a hook by hand

The hooks aren't scripts on your PATH — gag is the only thing this package installs. To run one outside pre-commit (debugging):

uv tool install 'git-a-grip[hooks]'
python -m git_a_grip.hooks ruff-check path/to/file.py

Development

uv sync
uv run pytest

Releases are cut by CI: merge to main, and if lint, tests and the install proofs pass, cz bump tags it and publish.yml uploads to PyPI. Nothing is tagged before the checks pass.

This repo eats its own dog food — its hooks run on itself, and the tree below is maintained by embed-tree.

git-a-grip/
|-- .github/
|   |-- workflows/
|   |   |-- ci.yml
|   |   `-- publish.yml
|   `-- zizmor.yml
|-- src/
|   `-- git_a_grip/
|       |-- __init__.py
|       |-- audit.py
|       |-- cli.py
|       |-- commitizen_early.py
|       |-- cz.py
|       |-- doc_block.py
|       |-- embed_command.py
|       |-- embed_tree.py
|       |-- hook_docs.py
|       |-- hooks.py
|       |-- mypy_hook.py
|       |-- node_hooks.py
|       |-- pick.py
|       |-- privacy.py
|       |-- privacy_hook.py
|       |-- privacy_terms.py
|       |-- project_env.py
|       |-- pytest_hook.py
|       |-- regen_file.py
|       |-- restage.py
|       |-- ruff_hooks.py
|       |-- sync.py
|       |-- version.py
|       `-- zizmor_hook.py
|-- tests/
|   |-- test_audit.py
|   |-- test_cli.py
|   |-- test_commitizen_early.py
|   |-- test_doc_block.py
|   |-- test_embed_command.py
|   |-- test_embed_tree.py
|   |-- test_hook_docs.py
|   |-- test_hooks.py
|   |-- test_mypy_hook.py
|   |-- test_node_hooks.py
|   |-- test_packaging.py
|   |-- test_pick.py
|   |-- test_privacy.py
|   |-- test_privacy_hook.py
|   |-- test_privacy_terms.py
|   |-- test_project_env.py
|   |-- test_pytest_hook.py
|   |-- test_regen_file.py
|   |-- test_restage.py
|   |-- test_ruff_hooks.py
|   |-- test_sync.py
|   |-- test_version.py
|   `-- test_zizmor_hook.py
|-- .gitignore
|-- .pre-commit-config.yaml
|-- .pre-commit-hooks.yaml
|-- .ruff.toml
|-- CHANGELOG.md
|-- CLAUDE.md
|-- LICENSE
|-- pyproject.toml
|-- README.md
`-- uv.lock