How to check if a tag exists in a repo

Question

I have a repo on GitLab and now I am on the need of checking if a tag exists on a specific repo. I need to check this using Python.

In GitLab API I don't see any method to check this.

If prefer doing it using the GitLab API but if it is not possible I would like to know if it can be done directly using some Git command.

[Get a specific repository tag determined by its name](https://docs.gitlab.com/ee/api/tags.html#get-a-single-repository-tag) – I guess nonexistent tags will return 404, no? — knittl, May 08 '23 at 09:01
Get the list tags and check if the value is in the list https://docs.gitlab.com/ee/api/tags.html#list-project-repository-tags ? — azro, May 08 '23 at 09:01
NB tags do not exist "in a branch". Tags are global and (usually) point to a commit (if you wanted to, you could tag blobs and trees as well) — knittl, May 08 '23 at 09:26
@knittl yep, you are totally right, i did a imstake, sorry, i am newbie. — Willy, May 08 '23 at 09:38

score 1 · Answer 1 · answered May 08 '23 at 09:13

You can use "subprocess" library and shell command. Like this:

import subprocess

repo_url = "https://gitlab.com/<your_namespace>/<your_project>.git"
tag_name = "v1.0.0"
branch_name = "main"

command = f"git ls-remote --tags --refs {repo_url} refs/heads/{branch_name}"

output = subprocess.check_output(command, shell=True, universal_newlines=True)

if f"refs/tags/{tag_name}" in output:
    print(f"{tag_name} exists")
else:
    print(f"{tag_name} doesn't exist")

Don't use `shell=True` - see [answer](https://stackoverflow.com/a/29023432/). — metatoaster, May 08 '23 at 12:42

How to check if a tag exists in a repo

1 Answers1