[chef] Re: testing a file for check sums

Chronological Thread 
  • From: Daniel DeLeo < >
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  • Subject: [chef] Re: testing a file for check sums
  • Date: Sat, 2 Mar 2013 12:56:35 -0800

On Saturday, March 2, 2013 at 6:34 AM, David Montgomery wrote:


I have code that checkout a repo from git.

I need to file if a file has changed and if so the restart a service.  How can use chef to create a check for a file from a git repo and find out if the file has changed?

Note: the is a private repo and I use a python script to manage the checkout since I have to pass a username and password for each chef run.  I do not use the git resource.

So after I checkout the repo, I have a file called /path/to/foo.  If that file changed on the next pull, how do I notify a service to restart?


If possible, I'd recommend fixing whatever issue is preventing you from using the git resource. If that's not possible for firewall/policy/whatever reasons, then your next best bet is to make a LWRP that works the same way (compare `git ls-remote REMOTE REF` to `git rev-parse HEAD`, git fetch if needed, then mark the resource updated).

If you really can't do either of those, then you can use Chef's built-in checksumming code. In Chef 11 the code is here:


In Chef 10 and previous, similar logic was implemented in ChecksumCache.

Daniel DeLeo

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