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Now I have a git repository on a Windows machine, and would like to run automatic tests on this repository with Perl. To make sure that every time I launch the test the repository is the latest, I use:

system("git pull");

before the test.

But it returns an error: 

fatal: Uh oh. Your system reports no Git commands at all.

However, when I run git show with the same methodology, like:

system("git show");

The output is OK, which is to say Windows command prompt recognized the git command (and it does exist in system PATH). So why some of the git commands could succeed while the others can't?

PS: I'm using Git Bash, if I launch the Perl script from git bash, both git pull and git show work. But my expectation is to double click the perl script to run it instead of calling it from Git Bash shell.

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  • how does you system find git when you run git pull? Did you add it to your PATH? Commented Jul 31, 2013 at 10:21
  • @Chronial Yes I added it in the system PATH. Otherwise git show would also fail. Commented Jul 31, 2013 at 10:51

2 Answers 2

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Make sure this isn't a path issue, as explained in this link (for windows, but valid for other OS too). Check also if you don't have any active git alias which might prevent a git pull to work properly.

Regarding the path issue, the OP aladine confirms in the comments:

I discover that after I reinstall git, it works as normal.
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The link in the answer of @lord_linus helped a lot to solve my problem, but I would like to make it more clear.

Indeed it's a path problem. Since I hope to use git command with the Command Prompt of Windows, I added the git command path (for me it's D:\Git\Bin) to PATH in environment variables.

Now in Git Bash there're two git commands:

$ which git git is /bin/git git is /Bin/git

And in Command Prompt there's one git command:

C:\>where git D:\Git\bin\git.exe

I think that messed up the paths. My solution is to use D:\Git\bin\git.exe instead of git, so in my Perl script I wrote:

my $git = `where git`; system("$git pull");

This work around could work as I expect.

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