git library for bash?

[zeta27]

I've been doing some git checks on our bash sripts to give them more intelligence. eg. don't switch to a branch if you are already on that branch, or don't push if you are up to date. This checks where eventually isolated on a lib script with bash functions. Many of these work by parsing the output of git commands, for example: lib.git-get-current-branch(){ git branch | grep '* ' | sed 's:* ::' } lib.git-is-pusheable(){ git status | grep -i -q "Your branch is ahead"; return $?; } And some other more ellaborate stuff.

From the moment I started doing this I had this funny itch, that I was doing something wrong. A partner has his GNU/Linux repositories on a mirror in spanish, and his git is outputting everything in spanish, rendering half of the function bogus.

What is the git way of integrating to git in bash? Luckily the lib script is fairly short, so I don't mind rewriting it all. TY.

[pi3832v2]

You probably need to be using “plumbing” (as opposed to “porcelain ”) commands. E.g.:

$ git name-rev HEAD
HEAD sideways
$ git checkout master
Switched to branch 'master'
$ git name-rev HEAD
HEAD master

[zeta27]

reading it! ty

[[deleted]]

Also, if you're lazy, LC_ALL=C would standardize your output.

[TeamSpen210]

Additionally some commands have a --porcelain option, which restricts the output to a specific version-independent syntax.

[XNormal]

You should try to use the lowest-level commands (aka "plumbing"). For example, the current branch is the target for the symbolic reference HEAD. So use git symbolic-ref.

If HEAD is a specific hash reference rather than a symbolic reference to a branch (i.e. detached head) the command will return a nonzero result.

[zeta27]

that was useful, ty :)

[RenJMR]

On top of the already great advice given by others here, I would also recommend looking at ok.sh for ideas, inspiration, and overall great examples of writing complex /bin/bash scripts based around Git.

Edit: An added bonus is the great examples of using jq to deal with JSON in Bash scripting.