[CI] Refactor the maven role

To make it more flexible.

Also cross-test with library-template (build) since it is now
possible to do so.

Change-Id: I137013dc6bba01ef9a20f3f86cb4e4ced014421e

playbooks/java-libraries/build.yaml

@@ -2,13 +2,8 @@
   roles:
     - install-jdk
     - install-maven
-  tasks:
+    - role: maven
-    - name: Build the project with Maven
-      shell: mvn clean install
-      args:
-        chdir: "{{ library_path }}"  # Pointing to the directory with pom.xml
       vars:
-        library_path: "{{ zuul.project.src_dir }}/{{ java_libraries[0].context }}"
+        # TODO: support more
-      environment:
+        maven_pom_dir: "{{ java_libraries[0].context }}"
-        MAVEN_HOME: "/opt/apache-maven-3.8.8"
+        maven_phases: ["install"]
-        PATH: "{{ ansible_env.PATH }}:/opt/apache-maven-3.8.8/bin"

roles/maven/defaults/main.yml

@@ -0,0 +1,5 @@
+zuul_work_dir: "{{ zuul.project.src_dir }}"
+
+maven_version: "3.8.8"
+maven_phases: []
+maven_pom_dir: ""

roles/maven/tasks/main.yml

@@ -0,0 +1,9 @@
+- name: Run Maven
+  command:
+    argv: "{{ ['mvn'] + maven_phases }}"
+    chdir: "{{ zuul_work_dir }}/{{ maven_pom_dir }}"
+  vars:
+    maven_home: "/opt/apache-maven-{{ maven_version }}"
+  environment:
+    MAVEN_HOME: "{{ maven_home }}"
+    PATH: "{{ maven_home }}/bin:{{ ansible_env.PATH }}"

zuul.d/project.yaml

@@ -34,5 +34,16 @@
         - opendev-buildset-registry:
             files: *nebulous-component-template-apply-helm-charts-files
 
+        # cross-testing with library-template
+        - nebulous-library-template-build-java-libraries:
+            vars:
+              zuul_work_dir: src/opendev.org/nebulous/library-template
+            required-projects:
+              - nebulous/library-template
+            files:
+              - ^playbooks/java-libraries/
+              - ^roles/install-jdk/
+              - ^roles/install-maven/
+
     gate:
       jobs: *check-jobs