allow specifying custom tobiko gerrit

refsec for checking out and testing a specific patch

Change-Id: I8e7b3ac16700fd28ef6f00577e822838713904d9

infrared/tasks/install.yml

@@ -11,10 +11,35 @@
       name: "{{ required_packages }}"
       state: present
 
+- name: "Ensure {{ test.dir }} doesn't exist"
+  file:
+    path: "{{ test.dir }}"
+    state: absent
+
 - name: Clone Tobiko project
   git:
       repo: 'https://review.opendev.org/x/tobiko'
       dest: "{{ test.dir }}"
+  when: test.refsec == ''
+
+- name: Checkout specific gerrit patch
+  git:
+      repo: 'https://review.opendev.org/x/tobiko'
+      dest: "{{ test.dir }}"
+      refspec: "{{ test.refsec }}"
+      version: 'FETCH_HEAD'
+  when: test.refsec != ''
+
+- name: output gerrit patch log
+  shell: |
+        git log -n 1
+  register: git_log
+  args:
+    chdir: "{{ test.dir }}"
+  when: test.refsec != ''
+
+- debug: var=git_log.stdout_lines
+  when: test.refsec != ''
 
 - name: Create Virtualenv
   vars:
@@ -24,6 +49,10 @@
       name: "{{ packages }}"
       state: latest
 
+  args:
+    chdir: "{{ test.dir }}"
+  when: test.gerrit-patch != ''
+
 - name: Install Tobiko
   pip:
       chdir: "{{ test.dir }}"

plugin.spec

@@ -41,3 +41,10 @@ subparsers:
                       help: |
                           The set of tests to execute
                       default: neutron
+                  refsec:
+                      type: Value
+                      help: |
+                          specific gerrit patch refsec to
+                          checkout, example:
+                          --refsec refs/changes/66/665966/7
+                      default: ''