execute git blame command in java

Question

I'm trying to use the following Java syntax to execute a Git blame command:

Process process = Runtime.getRuntime().exec("/usr/bin/git blame https://github.com/git/git/alloc.c > TestGit.txt");

But, when I run the code in Java, it doesn't give any result. And, when I tried to execute it in the Terminal, it just creates an empty "TestGit.txt" file, and I got the error: fatal: Not a git repository (or any of the parent directories): .git.

Edwin Buck · Accepted Answer · 2012-06-14 18:55:36Z

3

Be sure to change directories into the git repository prior to launching the command

Process process = Runtime.getRuntime().exec("cd /path/to/repository; /usr/bin/git blame https://github.com/git/git/alloc.c > TestGit.txt");

answered Jun 14, 2012 at 18:55

Edwin Buck

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1 Comment

Edwin Buck Over a year ago

@caarlos0 Either you are not on a Linux / Unix system, or your shell has the command cd built-in. If the latter, try launching /bin/bash -c with the rest of the command as the "input string".

Jay Sullivan · Accepted Answer · 2012-06-14 18:56:12Z

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I think for git blame to work, you'll need to be inside the repository. You'd need to be inside the repository directory (which means you'll need to check it out first), and run:

git blame alloc.c

answered Jun 14, 2012 at 18:56

Jay Sullivan

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3 Comments

Ghadeer Over a year ago

ya when I use the "cd" command to go inside "git" folder. Then, I use "git blame alloc.c" in the terminal, it works. However, I need to execute the blame command on the on-line file. But, it didn't work

Jay Sullivan Over a year ago

You can't use git blame against an online file in the way you're doing; you have to check out the repository first.

Ghadeer Over a year ago

OK, I cloned it to my computer. But now, when I use the "cd" command to be inside the directory (git), and then apply "blame" command, it works. However, when I use the path of the file "git blame /home/gh/git", I get the same error???

Ghadeer · Accepted Answer · 2012-07-06 02:46:10Z

0

The following is the right syntax to execute blame command in Java for linux:

git --git-dir=/home/gh/git/.git --work-tree=/home/gh/git blame builtin/tag.c

answered Jul 6, 2012 at 2:46

Ghadeer

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Comments

caarlos0 · Accepted Answer · 2012-10-03 18:49:31Z

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The javier way:

Process process = Runtime.getRuntime().exec("/usr/bin/git blame https://github.com/git/git/alloc.c > TestGit.txt", null, new File('/path/to/repository'));

answered Oct 3, 2012 at 18:49

caarlos0

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