Does anybody have a good "execute a command when nothing changes" tool? I have some situations where I'd like to take action if, say, a file hasn't had its mtime updated in 24 hours.
Watchman: Execute a command when something changes
61–70 of 98 posts
Re: Watchman: Execute a command when something changes
#62I've seen about a dozen versions of this now. So my question is, who watches the watchmen?
Came here for this. Thank you.
Re: Watchman: Execute a command when something changes
#63Does anybody have a good "execute a command when nothing changes" tool? I have some situations where I'd like to take action if, say, a file hasn't had its mtime updated in 24 hours.
Does it need to be precise? I'd probably just use an hourly cron job.
Re: Watchman: Execute a command when something changes
#64Does anybody have a good "execute a command when nothing changes" tool? I have some situations where I'd like to take action if, say, a file hasn't had its mtime updated in 24 hours.
Not sure if there's a way to do it instantly, but one way is to just run a find command in a cron job every X hours:
find /foo/bar -type f -mtime +1 | xargs foobarRe: Watchman: Execute a command when something changes
#65Re: Watchman: Execute a command when something changes
#66For those use-cases I use entr ( https://github.com/clibs/entr ). In what sense does watchman differ to it? Didn't see anything related to this at first glance :-)
The page linked above says: > WARNING: This is a (possibly outdated and/or unmaintained) fork of https://github.com/eradman/entr .
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Re: Watchman: Execute a command when something changes
#67Re: Watchman: Execute a command when something changes
#68Not to be confused with Facebook’s file watch daemon, also names watchman, which does the same sort of thing but is more complicated. There’s a bunch of tools that integrate Facebook’s watchman for more efficient change tracking. Advantages of Facebook’s watchman: 1. Implements efficient file system event watches on macOS and Windows 2. IPC/daemon system reduces resource use because overlapping watches/triggers don’t…
Alternately, Facebook's project is not to be confused with this significantly older one.
Re: Watchman: Execute a command when something changes
#69Very happy user of https://github.com/watchexec/watchexec (rust), can recommend.
Yes, this is the one I reach for always. It works reliably AFAICT, runs on all platforms, is simple enough and still has the necessary features.
Re: Watchman: Execute a command when something changes
#70Shameless plug for my own take on file watchers. The filewatcher command line utility is available as a ruby gem. It exports shell variables, so you can print name of files that changes this way: $ filewatcher *.js 'echo $FILENAME'
It recently reached 1 million downloads. The current maintainer, Alex Popov, is a very skilled developer working from Moscow.