gitgit-branchgit-commitgit-hash

How can I get all symbolic names from a Git commit hash?


If a Git commit hash has multiple tags associated with it and/or is the head of multiple branches, is there a good way to list all of them?

I've looked through the options to git name-rev, git describe, and git symbolic-ref but haven't found any options that seem to do what I want. Frustratingly, git name-rev has a --tags option to list only tags but no apparent mechanism to list only branches (and git name-rev always seems to prefer tags over branches for me anyway).

$ git checkout -b branch1
$ git checkout -b branch2
$ git tag tag1
$ git tag tag2
$ git name-rev HEAD
HEAD tags/tag1
$ git describe --all HEAD
HEAD tags/tag1
$ git symbolic-ref HEAD
refs/heads/branch2

To map a commit hash to all of its symbolic names, will I need to run git tag --list and git branch --all --list and then run git rev-parse on all of the results?


Solution

  • It should be possible to achieve what you want thanks to the git for-each-ref command:

    git for-each-ref --points-at=HEAD
    

    Complete example session:

    $ git init
    $ touch a
    $ git add a
    $ git commit -m a
    [master (root-commit) eb3222d] a
     1 file changed, 0 insertions(+), 0 deletions(-)
     create mode 100644 a
    $ git checkout -b branch1
    Switched to a new branch 'branch1'
    $ git checkout -b branch2
    Switched to a new branch 'branch2'
    $ git tag tag1
    $ git tag tag2
    $ git tag -a tag3 -m "annotated tag"
    $ git for-each-ref --points-at=HEAD
    eb3222db1821633a54ccd0a6434e883c4cb71b98 commit refs/heads/branch1
    eb3222db1821633a54ccd0a6434e883c4cb71b98 commit refs/heads/branch2
    eb3222db1821633a54ccd0a6434e883c4cb71b98 commit refs/heads/master
    eb3222db1821633a54ccd0a6434e883c4cb71b98 commit refs/tags/tag1
    eb3222db1821633a54ccd0a6434e883c4cb71b98 commit refs/tags/tag2
    0dbba96f519c2ad1b470f97171230004addff896 tag    refs/tags/tag3