Re: How to get the branch HEAD points to using a plumbing command?

Utku [off-list ref] writes:

My question is, is there a "better" (more idiomatic, less
"expensive", etc.) way of doing it using only one plumbing
command? This solution is OK but it is more work than just
matching one line with a regular expression. The reason I want to
do this using only plumbing commands is because I think that
plumbing command interface would be more stable than the format
(organization, structure) of files under the `.git/` directory
across Git versions. Please correct me if I'm wrong in this idea
as well.

The "HEAD" pointer can be a symbolic link, not a text file with
"ref: refs/heads/..." in it, and any approach that works directly
with "cat .git/HEAD" would be incorrect, unless it does a stat on
.git/HEAD first to see if it is a symlink.  And such implementation
details can change over time.

So you are right to seek a solution that hides such details from
you, i.e. a Git command, to do so.  It does not have to be plumbing,
though.

The orthodox answer would be to use "git symbolic-ref".  When you
want to learn which underlying ref a symbolic ref is pointing at,
that is the tool designed to answer that question.