How to use git bash command in C# application

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Hi
I have implemented a small application which will invoke the Git-bash.exe and execute a command to get the list of files associated with the commit id. I am sure the whole code is correct except the way I pass the arguments to the Process. Can some one please let me know how to pass the Git bash argument to C# Process. I googled alot and dint find a right way to provide this argument.

I know the issue is in below line

gitInfo.Arguments = "-c \"" + "git diff-tree -r 61140bb40f879dd21e8624fe8e2125df846572e8" + "\"";

Can some one let me know how to pass the arguments in right way.

What I have tried:

ProcessStartInfo gitInfo = new ProcessStartInfo();
gitInfo.CreateNoWindow = false;
gitInfo.UseShellExecute = false;
gitInfo.RedirectStandardError = true;
gitInfo.RedirectStandardOutput = true;
gitInfo.FileName = @"C:\Program Files\Git\git-bash.exe";
Process gitProcess = new Process();

gitInfo.WorkingDirectory = @"D:\CodeBranch";
gitInfo.Arguments = "-c \"" + "git diff-tree -r 61140bb40f879dd21e8624fe8e2125df846572e8" + "\"";

gitProcess.StartInfo = gitInfo;
gitProcess.Start();

string stderr_str = gitProcess.StandardError.ReadToEnd();  // pick up STDERR
string stdout_str = gitProcess.StandardOutput.ReadToEnd(); // pick up STDOUT

gitProcess.WaitForExit();
gitProcess.Close();

Posted 22-Sep-20 5:17am

Sampath579

Updated 23-Sep-20 19:40pm

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Richard MacCutchan 22-Sep-20 11:25am

That looks correct. What is the problem?

OriginalGriff 22-Sep-20 11:31am

What it is doing that you didn't expect, or not doing that you did?
Are there any error messages?
What have you tried to find out what exactly is happening?

Sampath579 22-Sep-20 11:37am

The git-bash window pop ups and disappear immediately. The same command git diff-tree -r 61140bb40f879dd21e8624fe8e2125df846572e8 if i enter manually in git-bash console then i get the list of files properly but when is send it as an arugment in c# process its failing to execute that command. If i comment that arguments part and execute my code then git-bash console is poping up and staying for longer time and hence i feel the way i pass the arguments to the process is wrong.

OriginalGriff 22-Sep-20 11:48am

So what does the debugger say is in the strerr and strout streams?
What does it show - exactly what - is in the arguments property string? (I assume it's not a fixed ID value from the way you have the single argument string spaced out).

Sampath579 22-Sep-20 11:58am

strerr_str is empty, since the git-bash console does not have any data in it and the window no longer exists during we read it. The ID is the commit id i have provided which is a valid one in my project.

When i check the value of arguments in visual studio during debugging the value of the arguments is as follows:
-c "git diff-tree -r 61140bb40f879dd21e8624fe8e2125df846572e8"

Richard MacCutchan 22-Sep-20 12:04pm

Have you tried it without the -c option?

Sampath579 22-Sep-20 12:08pm

I tried as follows:
gitInfo.Arguments = "git diff-tree -r 61140bb40f879dd21e8624fe8e2125df846572e8";

and the result is

bash: /mingw64/bin/git: cannot execute binary file
/usr/bin/bash: Exit 126.
in git bash console.

Richard MacCutchan 22-Sep-20 12:20pm

That suggests that the path to git is incorrect or the file itself is corrupt.

Sampath579 22-Sep-20 12:22pm

Nope. I dont think so, if that is the case then how can the git bash console invokes properly without arguments?

Richard MacCutchan 22-Sep-20 12:24pm

Sorry, no idea. But I do not think it is a problem with your code. Much more likely to be the environment that you are trying to run in. Does this run in pure Windows or WSL?

Richard MacCutchan 22-Sep-20 12:29pm

I have no experience of git-bash, but the documentation at Git for Windows[^] suggests that the executable is git, not bash. So maybe you need to remove the "-c git" from your arguments and just pass the actual git command starting at "diff-tree".

Sampath579 23-Sep-20 0:23am

Even tried this but no use. Every where in google people simple saying to write command there but no one gave an example how to write a command as a sample.. :(

Richard MacCutchan 23-Sep-20 3:51am

I suggest you go to the Git for Windows website (the link is in my previous message) and discuss with other users. This is a quite specialised piece of software, and the problem is not a programming one in the normal sense.

Sampath579 24-Sep-20 1:39am

I could able to solve this issue in different way. Since i am not aware of how to give this command line argument in c# Process, i written a batch file with all those GIT commands and called that batch file from c# code and it worked like a charm..

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Sampath579 · Accepted Answer · 2020-09-23T19:40:00

Solution 1

I could able to solve this issue in different way. Since i am not aware of how to give this command line argument in c# Process, i written a batch file with all those GIT commands and called that batch file from c# code and it worked like a charm..

Posted 23-Sep-20 19:40pm

Sampath579