[darcs-users] Fwd: Execute Automatic command with each commit

[Nathan Gray]

On Thu, Jan 31, 2008 at 10:26:25PM -0500, Max Battcher wrote:
> Nathan Gray wrote:
>> So in my scenario, I have a central development repo that generates HTML
>> documentation from source code that is pushed to it.  I would like to
>> only generate documentation for files that are affected by the push,
>> rather than all files in the repo.  Somehow my documentation generating
>> program needs to be told which files to process via the posthook.
>
> In one of my repos I've just been using something like:
>
> find -mtime -1 | my_posthook
>
> I realize it's not a perfect solution, but if you are desperate for any 
> solution its a working stopgap.

I fortunately am not desperate for a solution, but I am finding that I
am wanting this functionality in more repos.  The stopgap solution
that I currently have is described in http://bugs.darcs.net/issue524
and has been okay.  As I prepare to implement this in more repos, I
just wanted to check in and see if anyone had time to put this into
the posthook code.

> I know that several proposals have been made for what might be done to pass 
> information to posthooks, but would a simple "pipe-mode" for posthook be 
> able to make use of existing code, and thus maybe be something that could 
> be finished sooner rather than later?
>
> That is give me an option to get the equivalent of ``darcs changes -s 
> --xml-output`` for just the newly applied patches piped to my posthook...  
> I would assume you could just use the printing code already used by darcs 
> changes and just redirect standard output to a pipe to a posthook.

I have been generating a list of file names and a list of hash ids,
but I would be okay with an XML summary.

I would rather have the summary in an environment variable, rather
than from a pipe, in case there are multiple programs I want to run in
the posthook, all needing this information.

-kolibrie