I'm trying to automate buildsteps with a gui and want to create a json-file with all available tags and branch-heads for selection. I can already list all branches and tags in a repository by using
git ls-remote --tags/heads url-of-repo
Now I want to know, which tag belongs to a branch. I could do something like
git branch --contains tags/<tag>
But I want to avoid checking out all repositories locally to just get this information. Maybe there's a command to directly show all tags of a branch?
Make a clone, a bare one,
git clone --bare url-of-repo
Every time you want to list the branches, update the branches and tags first,
cd path-to-the-bare-repo
git fetch origin +refs/heads/*:refs/heads/* +refs/tags/*:refs/tags/*
and then run
git branch --contains tags/<tag>
I'd recommend git for-each-ref, which allows to format the output and is more script-friendly. For example,
git for-each-ref refs/heads --contains tags/<tag> --format="%(refname:lstrip=2)"
If you don't want to use cd in the script, you could also export GIT_DIR and unset it.
export GIT_DIR=path-to-the-bare-repo
git fetch origin +refs/heads/*:refs/heads/* +refs/tags/*:refs/tags/*
git for-each-ref refs/heads --contains tags/<tag> --format="%(refname:lstrip=2)"
unset GIT_DIR
or simply
GIT_DIR=path-to-the-bare-repo git fetch origin +refs/heads/*:refs/heads/* +refs/tags/*:refs/tags/*
GIT_DIR=path-to-the-bare-repo git for-each-ref refs/heads --contains tags/<tag> --format="%(refname:lstrip=2)"
If you don't want to make a local clone, and you have access to the hosting server. Another option is to run a web service to query the branches in the repository hosted in the server. You could use django to write and run such a service in several minutes.