Fixes bug https://github.com/ansible/ansible/issues/22455 - Git reset… (#22502)

* Fixes bug https://github.com/ansible/ansible/issues/22455 - Git reset fails when file with the name 'origin' is present in the repository

* #22455 Integration test for git module to test if it clones a repository with a file named origin

* Fixed yaml errors for test/integration/roles/test_git_clone/tasks/main.yml

* Removed the newly added target git and moved the code to test/integration/targets/git

* Reorganised code structure as per comments

* Fixed playbook name

* Added code that didn't make it to the playbook before.

* No longer need git.yml

* Remove non tasks specific code from tasks file and use existing variables

* Removed msg var from the vars.yml

lib/ansible/modules/source_control/git.py

@@ -816,7 +816,7 @@ def switch_version(git_path, module, dest, remote, version, verify_commit, depth
         if rc != 0:
             module.fail_json(msg="Failed to checkout branch %s" % branch,
                              stdout=out, stderr=err, rc=rc)
-        cmd = "%s reset --hard %s" % (git_path, remote)
+        cmd = "%s reset --hard %s --" % (git_path, remote)
     else:
         # FIXME check for local_branch first, should have been fetched already
         if is_remote_branch(git_path, module, dest, remote, version):

test/integration/targets/git/tasks/main.yml

@@ -29,3 +29,4 @@
 - include: checkout-new-tag.yml
 - include: tag-verification.yml
 - include: localmods.yml
+- include: reset-origin.yml

test/integration/targets/git/tasks/reset-origin.yml

@@ -0,0 +1,27 @@
+---
+
+- name: Clean up the directories
+  file:
+    state: absent
+    path: "{{ item }}"
+  with_items:
+    - "{{ repo_dir }}/origin"
+    - "{{ checkout_dir }}"
+
+- name: Create a directory
+  file:
+    name: "{{ repo_dir }}/origin"
+    state: directory
+
+- name: Initialise the repo with a file named origin,see github.com/ansible/ansible/pull/22502
+  shell: git init; echo "PR 22502" > origin; git add origin; git commit -m "PR 22502"
+  args:
+    chdir: "{{ repo_dir }}/origin"
+
+- name: Clone a git repo with file named origin
+  git:
+    repo: "{{ repo_dir }}/origin"
+    dest: "{{ checkout_dir }}"
+    remote: origin
+    update: no
+  register: status