[OT?] Executing Git from bash script invoked by cron

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Hi,

I try to mirror my local git repository. Therefore I created a bash script. This script, executed form the command line, works fine.

But the same script executed by cron, does not work. Git push does simply nothing. No output, no push, nothing. But git log and git --version works...

I tried to google the problem, but couldn't not find anything useful. Any hints are welcome.

Ubuntu 64Bit git version 1.7.0.4 cron 3.0pl1-106ubuntu5

Thanks,

Johannes
- -- 
Johannes Schneider - blog.cedarsoft.com
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Heya,

On Mon, Jun 28, 2010 at 23:00, Johannes Schneider <mailings@cedarsoft.com> wrote:

Very silly question, does the cron version have anything to push? IIRC 'git push' doesn't output anything if there's nothing to push? Try running 'git push --verbose' instead.

Excerpts from Johannes Schneider's message of Mon Jun 28 23:00:56 +0200 2010:

What do you do in such cases? Make sure you log both: stdout and stderr.

a) sh -c 'your quoted command &> /tmp/logfile'

b) if this still does not work use strace:

sh -c 'strace -f-o /tmp/strace.log your quoted command &> /tmp/logfile'

Then you know how much is happening.

You may also want to check that the environment is the same. Eg export > file to create a file containing your environment. Then source it in the cron job line somehow.

I'm not using cron that often so the solution could be simpler.

Marc Weber

Heya,

[Mark, please don't cull the cc list]

On Mon, Jun 28, 2010 at 23:17, Marc Weber <marco-oweber@gmx.de> wrote:

If you have to result to strace with git, it will probably then be helpful to use GIT_TRACE=1, it will at least tell you what commands are being invoked by git in a semi-human-readable format.

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On 06/28/2010 11:17 PM, Marc Weber wrote:

That is it. Thanks. Of course, git writes to stderr. And I did not redirect it properly. I don't understand the details, but this line is working now:

sh -c 'myscript' >> logfile 2> err

The problem - by the way - is related to ssh authentification... But that is another issue...

But here comes my question: Obviously all output created by git push is written to stderr. I'd expected that most of the content will end up in stdout. But I am sure there is a good reason for it - so I just accept it ;-)

Thanks,

Johannes
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Hi Johannes,

Johannes Schneider writes:

Perhaps you're not executing that `git push` as the same user, and therefore there's some problem reading the config files to determine where to push to? I really can't tell much else without some output.

-- Ram

Johannes Schneider <mailings@cedarsoft.com> writes:

One common problem with cron jobs is that you don't have the same $PATH in your shell and in cron. If you have no output at all, I'd say you didn't reach the line where git is executed in your script.

Try to add a

  set -x

at the beginning of your script to see what it's doing.