git module fails to checkout a new branch when source and destination branch names differ but are the same commit

[Steve R]

I seem to have a problem where if two branches point to the same commit but have a different name the ansible git module may fail. I believe the reason is that when the module sees that the commits are the same between HEAD on the local repo, and the remote requested branch, it doesn't bother to do a fetch to update the local branches 

Here is a playbook I created that demonstrates the issue, the last step in the play fails and it isn't clear to me why it should fail.

---

- hosts: 127.0.0.1

  connection: local

  vars:

    repo: FILL THIS IN

    

  tasks:

  - name: 'Clear out the existing git _remote_ repo'

    file: path="{{ repo }}" state=absent

    

  - name: 'Clear out the local repo'

    file: path="localcopy" state=absent

    

  - name: 'create directory for _remote_ repo'

    file: path="{{ repo }}" state=directory

  

  - name: 'init _remote_ git repo'

    command: "git init"

    args:

      chdir: "{{ repo }}"

  

  

  - name: 'create file'

    shell: "echo hello >> file"

    args:

      chdir: "{{ repo }}"

 

  

  - name: 'stage file in git'

    command: "git add file"

    args:

      chdir: "{{ repo }}"

  

  - name: 'making commit in _remote_ repo'

    command: 'git commit -m First'

    args:

      chdir: "{{ repo }}"

      

  - name: 'cloning git using ansible module to create _local_ repo'

    git:  repo="file://{{ repo }}"

          dest='localcopy'

          version="master"

          force=yes

          

  - name: 'creating new branch in _remote_ repo'

    command: 'git checkout -b old-branch'

    args:

      chdir: "{{ repo }}"

      

      

  - name: 'changing file in _remote_ repo'

    shell: "echo hello2 >> file"

    args:

      chdir: "{{ repo }}"

 

  - name: 'making new commit in _remote_ repo'

    command: 'git commit -a -m Second'

    args:

      chdir: "{{ repo }}"

 

  - name: 'switch branches to old-branch in _local_ repo using git ansible module'

    git:  repo="file://{{ repo }}"

          dest='localcopy'

          version="old-branch"

          force=yes

          

  - name: 'creating new-branch in _remote_ repo'

    command: 'git checkout -b new-branch'

    args:

      chdir: "{{ repo }}"

      

  - name: "running git ls-remote on _local_ to verify branch exists on _remote_"

    shell: "git ls-remote | grep new-branch"

    args:

      chdir: "localcopy"

      

  - name: 'attempting to switch to new-branch in _local_ repo'

    git:  repo="file://{{ repo }}"

          dest='localcopy'

          version="new-branch"

          force=yes

          

      

[Steve R]

Sorry I meant to say this happens on Ansible 1.9.2 and 2.0.0.