[CMake] CTest and GIT

[Brad King]

David Cole wrote:
> With this declarative style script, the inner ctest run via
> CTEST_COMMAND will use the CVSCOMMAND cache entry... CTEST_CVS_COMMAND
> is used when you use the CTEST_UPDATE() command within a command-based
> script (as opposed to a declarative script). Try adding:
> 
> CVSCOMMAND:STRING=/usr/bin/git-clone
> 
> to the cache section of your script and see if that changes it...

I don't think that will work because git doesn't work that way.

> On 3/5/08, *Andreas Schneider* <mail at cynapses.org
> <mailto:mail at cynapses.org>> wrote:
>     has someone CTest running with git? I can clone the repository, but
>     it always
>     tries to use cvs to update. See attached config file.

CTest has hard-coded support for CVS and SVN update rules because it
parses the output of the update command to report what changes were
obtained.  Someone will have to edit the source file

  CMake/Source/CTest/cmCTestUpdateHandler.cxx

to add explicit git support.

Coincidentally I was just starting to look at doing this in my spare
time last weekend, though I haven't actually produced code yet.  Since
git supports so many different ways of updating (fetch/merge,
fetch/rebase, multiple remotes with multiple branches, etc.) we will
have to teach CMake something new about configurable/custom update
rules.  I'm still thinking about how this might work.

Collecting nightly changes on a given branch (either local or remote)
can be done with git-rev-list's --until and --since options.  Then from
those sha1s we can ask git for the log messages and lists of files changed.

I don't know when I'll get back to working on this.  If you have any
suggestions feel free to post them or email me off list.

-Brad