watch-and-commit (wac)

A small Rust CLI that watches your working directory for file changes and automatically stages, commits, and pushes them to Git — no manual git add / git commit required.

It's built for scenarios where you want a continuous, low-friction commit history: pairing with an AI coding agent, screen-recording a live coding session, or just auto-saving work-in-progress to a branch as you edit.

Features

• Recursive filesystem watching of the current directory using notify.
• Debounced commits — bursts of file events (e.g. a save that touches many files, or a build that writes temp files) are collected for 3 seconds and committed as a single batch, rather than one commit per event.
• Pre-flight safety checks before watching starts, so wac never commits on top of a messy or out-of-sync repo:
  • confirms the current directory is a Git repository,
  • refuses to start if there are pre-existing staged or unstaged changes,
  • refuses to start if there are untracked files,
  • fetches from the remote (if one is configured) and verifies HEAD is in sync with its upstream branch, reporting how many commits you are ahead, behind, or diverged.
• Automatic push — after each commit, wac pushes to the remote if one is configured; if not, it simply commits locally.
• Bare-repo auto-initialisation — if GIT_WORK_TREE and GIT_DIR are set and point at a directory/repo that doesn't exist yet, wac creates the work tree and initialises the bare repository for you.
• No-op safe — if a debounced batch of events doesn't actually change the index (e.g. a file was written back to its original contents), wac skips the commit instead of creating an empty one.

Installation

Cargo

cargo install watch-and-commit

cargo-binstall

Pre-built binaries are published on GitHub Releases and can be fetched directly, skipping compilation:

cargo binstall watch-and-commit

Homebrew (macOS/Linux)

brew install rodolfovillaruz/tap/watch-and-commit

Winget (Windows)

winget install RodolfoVillaruz.WatchAndCommit

Debian/Ubuntu (.deb)

Download the .deb asset from the latest release and install it:

sudo dpkg -i wac_*.deb

From source

git clone https://github.com/rodolfovillaruz/watch-and-commit.git
cd watch-and-commit
cargo build --release
# binary is at target/release/wac

All install methods produce a binary named wac.

Usage

Run it from inside the Git repository you want to auto-commit:

wac

wac will:

1. Run pre-flight checks (clean working tree, no untracked files, in sync with upstream if a remote exists).
2. Start watching the current directory (.) recursively.
3. On file activity, wait for a 3-second quiet period, then run:

   git add .
   git commit -m "Update"
   git push   # only if a remote is configured

4. Repeat until you stop it with Ctrl+C.

If the pre-flight checks fail (dirty tree, untracked files, or a diverged/behind/ahead branch), wac prints the reason and exits without watching anything — commit, stash, push, or pull as needed and re-run it.

Using a detached work tree

You can watch a directory while storing Git metadata in a separate bare repository via the standard Git environment variables:

export GIT_DIR=/path/to/bare/repo.git
export GIT_WORK_TREE=/path/to/watched/files
wac

If either path doesn't exist yet, wac creates the work tree directory and initialises a bare repository at GIT_DIR automatically before watching starts.

How it works

The project is a small tokio async binary split into three modules:

• main.rs — runs the pre-flight checks, sets up the notify watcher, and wires filesystem events into an mpsc channel (capacity 100) consumed by the debouncer. Also handles optional bare-repo initialisation via GIT_WORK_TREE / GIT_DIR.
• debouncer.rs — receives events from the channel and coalesces bursts of activity: it waits for the first event, then keeps collecting further events (resetting a 3-second timer each time) until things go quiet, then hands the whole batch to the event handler.
• event_handler.rs — logs a human-readable summary of each event in the batch (created/modified/renamed/removed files), then runs git add ., checks whether the index actually changed, and if so commits with the message "Update" and pushes if a remote is configured.

Filesystem "access" events (e.g. a file merely being read) are filtered out at the watcher level so they don't trigger commits.

Caveats

• git add . stages all changes in the work tree — rely on .gitignore for anything that shouldn't be committed.
• Every commit uses the fixed message "Update"; there's no diff summarisation.
• Designed for personal/scratch workflows (notes repos, pairing sessions, auto-saved WIP branches) — not intended for shared, production, or protected branches.

Development

A Makefile wraps the common Cargo workflows:

make fmt        # cargo fmt --all
make lint       # cargo clippy -- -D warnings
make test       # cargo test
make build      # cargo build --release
make check      # fmt + lint + test + build
make verify     # cargo verify-project
make dry-run    # check + verify + cargo publish --dry-run
make clean      # cargo clean

Releases are cut with make tag (tags and pushes vX.Y.Z) followed by make publish (dry-run, tag, then cargo publish). Pushing a v* tag triggers .github/workflows/release.yml, which creates a GitHub Release, uploads cross-platform binaries and a .deb package, and updates the Homebrew tap and Winget manifest.

License

MIT — see LICENSE.