watchman

Install command:
brew install watchman

Watch files and take action when they change

https://facebook.github.io/watchman/

License: MIT

Development: Pull requests

Formula JSON API: /api/formula/watchman.json

Formula code: watchman.rb on GitHub

Bottle (binary package) installation support provided for:

macOS on
Apple Silicon
golden gate ✅
tahoe ✅
sequoia ✅
Linux ARM64 ✅
x86_64 ✅

Current versions:

stable ✅ 2026.10.26.00
head ⚡️ HEAD

Patches:

https://github.com/facebook/watchman/commit/21e10ae9596a81ac95795ee0915f4308a9c34603

Depends on:

edencommon 2026.10.26.00 Shared library for Watchman and Eden projects
fb303 2026.10.26.00 Thrift functions for querying information from a service
fbthrift 2026.10.26.00 Facebook's branch of Apache Thrift, including a new C++ server
fmt 12.2.1 Open-source formatting library for C++
folly 2026.10.26.00 Collection of reusable C++ library artifacts developed at Facebook
glog 0.7.1 Application-level logging library
pcre2 10.49 Perl compatible regular expressions library with a new API
python@3.15 3.15.2 Interpreted, interactive, object-oriented programming language

Depends on when building from source:

cmake 4.4.5 Cross-platform make
cpptoml 0.1.1 Header-only library for parsing TOML
gflags 2.3.1 Library for processing command-line flags
googletest 1.18.0 Google Testing and Mocking Framework
libevent 2.1.13 Asynchronous event library
mvfst 2026.10.26.00 QUIC transport protocol implementation
openssl@4 4.1.0 Cryptography and SSL/TLS Toolkit
pkgconf 3.0.10 Package compiler and linker metadata toolkit
python-setuptools 84.2.1 Easily download, build, install, upgrade, and uninstall Python packages
rust 1.99.1 Safe, concurrent, practical language

Binaries: watchman, watchman-diag, watchman-make, watchman-replicate-subscription, watchman-wait, watchmanctl

GitHub Packages downloads:

Last 30 days116,070
Downloads14,176,793
Analytics install events (30 days)15,266
Downloads / install events (30 days)7.6×

Source: GitHub Packages, fetched 2026-11-10T00:48:53Z. Analytics dates: 2026-10-11 to 2026-11-10. Totals exclude downloads from Bintray before the migration to GitHub Packages. Downloads and install attempts measure different things; the difference does not count analytics opt-outs. Definitions and limitations.

Analytics:

30 days90 days365 days
Installs15,22438,275237,298
Installs (--HEAD)4290537
Installs on Request15,20438,221236,912
Installs on Request (--HEAD)4290529
Build Errors651
Build Errors (--HEAD)1