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git git-detached-head

Programmatically check if HEAD is detached?

发布于 2018-09-07 11:23:37

I want to know whether I'm in a "HEAD detached" state in a script.

Currently I parse the output of git status but I dislike doing so because I've heard that it's a bad practice to parse Git output that's meant for human - I want a program-friendly interface to tell me whether HEAD is detached. I also don't want to manually look into .git/HEAD or parse git description or git branch.

Any ideas?

Questioner

iBug

Viewed

0

rodrigo 2018-09-07 20:07:56

The easiest command is probably:

$ git symbolic-ref -q HEAD

and check the exit status: 0 means normal; 1 is detached.

From the docs of git-symbolic-ref:

-q, --quiet
   Do not issue an error message if the <name> is not a symbolic ref
   but a detached HEAD; instead exit with non-zero status silently.

iBug 2018-09-08 03:21:49

Great solution. I'll just take this one.

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