Watch files and take action when they change

Current versions

watchman requires the following formulae to be installed:
autoconf 2.69 Automatic configure script builder
automake 1.15.1 Tool for generating GNU Standards-compliant Makefiles
libtool 2.4.6_1 Generic library support script
pkg-config 0.29.2 Manage compile and link flags for libraries
openssl 1.0.2m SSL/TLS cryptography library
pcre 8.41 Perl compatible regular expressions library

Formula history

ilovezfs watchman: set minimum macOS requirement to 10.10
Wez Furlong watchman 4.9.0
ilovezfs Revert "watchman: remove launchctl fix from post_install (#16302)"
ilovezfs watchman: remove launchctl fix from post_install (#16302)
Frederick Akalin watchman: revision to fix erroneous cellar :any
Wez Furlong watchman: fix build dep on libtool (#14734)
Wez Furlong watchman: launchctl unload post-install (#9456)
Mike McQuaid Use hash rockets again. (#5177)
Mike McQuaid Use Ruby 1.9+ symbol hash keys in all formulae. (#4942)
Wez Furlong watchman 4.7.0
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