watchman ☆
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Description:
Watch files and take action when they change
Type: Formula  |  Latest Version: 2025.12.15.00@0  |  Tracked Since: Dec 16, 2025
Links: Homepage  |  GitHub  |  Docs  |  formulae.brew.sh
Stars: 13,442  |  Forks: 1,047  |  Language: C++  |  Category: Developer tools
Tags: monitoring filesystem automation developer-tools build-tool
Install: brew install watchman
About:
Watchman is a high-performance file-watching service that monitors directories for changes and triggers actions in response. It uses a client-server model to efficiently track file system events, making it ideal for large codebases and complex build processes. Its primary value is enabling fast, reliable automation for development workflows like live reloading, build systems, and synchronization tools.
Key Features:
  • High-performance client-server architecture for efficient file watching
  • Supports powerful expression-based matching and filtering for file changes
  • Provides a persistent subscription model for long-running monitoring tasks
  • Includes a CLI and multiple language bindings for integration
  • Optimized for large projects with deep directory trees and many files
Use Cases:
  • Triggering build systems and compilation tasks when source files change
  • Enabling live reloading for web development servers and hot module replacement
  • Automating file synchronization or deployment pipelines based on filesystem events
Alternatives:
  • inotifywait – Lower-level Linux-only tool; Watchman offers cross-platform support and a persistent daemon.
  • fswatch – Cross-platform file watcher library; Watchman provides a server model and richer query language.
  • nodemon – Node.js-specific tool for restarting applications; Watchman is language-agnostic and more general-purpose.
Version History
Detected Version Rev Change Commit
Dec 23, 2025 10:37am 2025.12.15.00 0 VERSION_BUMP 03e116d5
Dec 16, 2025 12:57pm 0 VERSION_BUMP 339bdaa1
Dec 15, 2025 12:11am 1 VERSION_BUMP 64030765
Nov 10, 2025 8:38pm 0 VERSION_BUMP ad8762cb
Nov 10, 2025 7:04pm 0 VERSION_BUMP 4a38d019
Nov 3, 2025 7:16pm 0 VERSION_BUMP 641b44b9
Oct 21, 2025 8:59pm 0 VERSION_BUMP e62d6882
Oct 14, 2025 9:40am 0 VERSION_BUMP 5f7acde5
Oct 7, 2025 12:52pm 0 VERSION_BUMP 5cb8b5ad
Aug 26, 2025 7:58am 0 VERSION_BUMP 34863a03
Dec 27, 2024 10:35pm 2 VERSION_BUMP 62b568ef
Dec 27, 2024 2:24pm 2 VERSION_BUMP 5b511f11
Dec 16, 2024 6:40am 1 VERSION_BUMP d7158011
Nov 27, 2024 5:01am 0 VERSION_BUMP e4aa4d1d
Nov 19, 2024 12:30am 0 VERSION_BUMP 4f3ca2fc
Nov 18, 2024 5:25pm 0 VERSION_BUMP c08e773c
Nov 11, 2024 8:38pm 0 VERSION_BUMP 8c25e39c
Nov 11, 2024 1:18pm 0 VERSION_BUMP f049f0a6
Oct 30, 2024 1:08am 0 VERSION_BUMP ccbbdcb0
Oct 29, 2024 7:42pm 0 VERSION_BUMP e4181130
Oct 21, 2024 9:31pm 0 VERSION_BUMP cf35aedc
Sep 30, 2024 11:19pm 0 VERSION_BUMP 7b8c660e
Sep 20, 2024 3:11am 0 VERSION_BUMP ba6a45d0
Sep 12, 2024 1:54pm 0 VERSION_BUMP d17fd4f8
Aug 28, 2024 10:10am 0 REVISION_ONLY b5048c46
Aug 28, 2024 4:08am 0 REVISION_ONLY a2cc924e
Aug 28, 2024 1:05am 1 VERSION_BUMP 3173a67b
Aug 20, 2024 5:10pm 0 VERSION_BUMP dd24131f
Aug 12, 2024 6:16pm 0 VERSION_BUMP a15327dc
Jul 16, 2024 4:49pm 0 VERSION_BUMP 6c00f98a
Jun 21, 2024 11:14pm 0 VERSION_BUMP 8bc8ada7
Jun 13, 2024 9:59pm 0 VERSION_BUMP 45a88e68
May 7, 2024 1:39am 0 VERSION_BUMP 45bd576f
May 4, 2024 12:39pm 0 VERSION_BUMP 1ea25079
May 2, 2024 11:50am 0 VERSION_BUMP 1c91c97f
Apr 15, 2024 11:57pm 0 VERSION_BUMP e26d63b8
Jan 25, 2024 10:36pm 1 VERSION_BUMP 1a6b620f
Jan 24, 2024 10:43pm 1 VERSION_BUMP b9b7f0cd
Oct 24, 2023 9:21am 0 VERSION_BUMP 9433c878
Oct 23, 2023 2:19am 1 VERSION_BUMP 422dd417
Oct 9, 2023 8:34pm 0 VERSION_BUMP 57ba466b
Oct 9, 2023 8:34pm 0 VERSION_BUMP e79d65c3
Oct 3, 2023 12:28pm 0 VERSION_BUMP b33cc888
Sep 4, 2023 3:26pm 0 VERSION_BUMP 36349dcf
Aug 28, 2023 9:35am 0 VERSION_BUMP df05c778
May 22, 2023 12:08pm 0 VERSION_BUMP aefcd542
May 21, 2023 12:52pm 1 VERSION_BUMP cfc9ce5c
May 17, 2023 11:25am 0 VERSION_BUMP 67f1966f
May 8, 2023 3:49pm 0 VERSION_BUMP 660635e7
May 8, 2023 9:34am 0 VERSION_BUMP 33179586
Apr 10, 2023 4:48pm 0 VERSION_BUMP dd2ffbec
Apr 10, 2023 11:05am 0 VERSION_BUMP 47242ea9
Mar 27, 2023 10:43am 0 VERSION_BUMP 53da9c29
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