Add version 0.2 to jib-maven task

- Add parameter for the maven image
- Replace usage of PipelineResource to image name as param and image digest as
results

Signed-off-by: Yulia Gaponenko <yulia.gaponenko1@de.ibm.com>

task/jib-maven/0.2/README.md

@@ -0,0 +1,54 @@
+# Jib Maven
+
+This Task builds Java/Kotlin/Groovy/Scala source into a container image using Google's [Jib](https://github.com/GoogleContainerTools/jib) tool.
+
+Jib works with [Maven](https://github.com/GoogleContainerTools/jib/tree/master/jib-maven-plugin) and [Gradle](https://github.com/GoogleContainerTools/jib/tree/master/jib-gradle-plugin) projects, and this template is for Maven projects.
+
+## Install the Task
+
+```
+kubectl apply -f https://raw.githubusercontent.com/tektoncd/catalog/master/task/jib-maven/0.2/jib-maven.yaml
+```
+
+## Parameters
+
+- **IMAGE**: The name of the image to build
+- **MAVEN_IMAGE**: The base image for maven (_default_: `gcr.io/cloud-builders/mvn`)
+- **DIRECTORY**: The directory in the source repository where source should be found. (*default: .*)
+- **CACHE**: The name of the volume for caching Maven artifacts and
+  base image layers (*default: empty-dir-volume*)
+
+## Workspaces
+
+* **source**: A [Workspace](https://github.com/tektoncd/pipeline/blob/master/docs/workspaces.md) containing the source to build.
+
+## Results
+
+- **IMAGE_DIGEST**: Digest of the image just built.
+
+## Usage
+
+This TaskRun runs the Task to fetch a Git repo, and build and push a container
+image using Jib (Maven)
+
+```yaml
+apiVersion: tekton.dev/v1beta1
+kind: TaskRun
+metadata:
+  name: example-jib-maven
+spec:
+  taskRef:
+    name: jib-maven
+  params:
+  - name: IMAGE
+    value: gcr.io/my-repo/my-image
+  - name: DIRECTORY
+    value: ./examples/helloworld
+  workspaces:
+  - name: source
+    persistentVolumeClaim:
+      claimName: my-source
+```
+
+If you would like to customize the container, configure the `jib-maven-plugin` in your `pom.xml`.
+See [setup instructions for Maven](https://github.com/GoogleContainerTools/jib/tree/master/jib-maven-plugin#setup) for more information.

task/jib-maven/0.2/jib-maven.yaml

@@ -0,0 +1,72 @@
+apiVersion: tekton.dev/v1beta1
+kind: Task
+metadata:
+  name: jib-maven
+  labels:
+    app.kubernetes.io/version: "0.2"
+  annotations:
+    tekton.dev/pipelines.minVersion: "0.12.1"
+    tekton.dev/tags: image-build
+    tekton.dev/displayName: "jib maven"
+spec:
+  description: >-
+    This Task builds Java/Kotlin/Groovy/Scala source into a container image using Google's Jib tool.
+
+    Jib works with Maven and Gradle projects, and this template is for Maven projects.
+
+  params:
+  - name: IMAGE
+    description: Name of the image to build
+  - name: MAVEN_IMAGE
+    type: string
+    description: Maven base image
+    default: gcr.io/cloud-builders/mvn@sha256:57523fc43394d6d9d2414ee8d1c85ed7a13460cbb268c3cd16d28cfb3859e641 #tag: latest
+  - name: DIRECTORY
+    description: The directory containing the app, relative to the source repository root
+    default: .
+  - name: CACHE
+    description: The name of the volume for caching Maven artifacts and base image layers
+    default: empty-dir-volume
+  - name: INSECUREREGISTRY
+    description: Whether to allow insecure registry
+    default: "false"
+  workspaces:
+  - name: source
+
+  results:
+  - name: IMAGE_DIGEST
+    description: Digest of the image just built.
+
+  steps:
+  - name: build-and-push
+    image: $(params.MAVEN_IMAGE)
+    # Make sh evaluate $HOME.
+    script: |
+      #!/bin/sh
+      mvn -B \
+        -Duser.home=$HOME \
+        -Djib.allowInsecureRegistries=$(params.INSECUREREGISTRY) \
+        -Djib.to.image=$(params.IMAGE) \
+        compile \
+        com.google.cloud.tools:jib-maven-plugin:build
+    workingDir: $(workspaces.source.path)/$(params.DIRECTORY)
+    env:
+    - name: HOME
+      value: /workspace
+    - name: "DOCKER_CONFIG"
+      value: $(credentials.path)/.docker/
+    volumeMounts:
+    - name: $(params.CACHE)
+      mountPath: /workspace/.m2
+      subPath: m2-cache
+    - name: $(params.CACHE)
+      mountPath: /workspace/.cache
+      subPath: jib-cache
+
+  - name: digest-to-results
+    image: $(params.MAVEN_IMAGE)
+    script: cat $(workspaces.source.path)/target/jib-image.digest | tee /tekton/results/IMAGE_DIGEST
+
+  volumes:
+  - name: empty-dir-volume
+    emptyDir: {}

task/jib-maven/0.2/tests/pre-apply-task-hook.sh

@@ -0,0 +1,8 @@
+#!/bin/bash
+
+# Add an internal registry as sidecar to the task so we can upload it directly
+# from our tests withouth having to go to an external registry.
+add_sidecar_registry ${TMPF}
+
+# Add git-clone
+add_task git-clone latest

task/jib-maven/0.2/tests/resources.yaml

@@ -0,0 +1,11 @@
+---
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: jib-maven-source-pvc
+spec:
+  accessModes:
+    - ReadWriteOnce
+  resources:
+    requests:
+      storage: 500Mi

task/jib-maven/0.2/tests/run.yaml

@@ -0,0 +1,65 @@
+---
+apiVersion: tekton.dev/v1beta1
+kind: Pipeline
+metadata:
+  name: jib-maven-test-pipeline
+spec:
+  workspaces:
+  - name: shared-workspace
+  tasks:
+  - name: fetch-repository
+    taskRef:
+      name: git-clone
+    workspaces:
+    - name: output
+      workspace: shared-workspace
+    params:
+    - name: url
+      value: https://github.com/che-samples/console-java-simple
+    - name: subdirectory
+      value: ""
+    - name: deleteExisting
+      value: "true"
+  - name: jib-maven
+    taskRef:
+      name: jib-maven
+    runAfter:
+    - fetch-repository
+    workspaces:
+    - name: source
+      workspace: shared-workspace
+    params:
+    - name: IMAGE
+      value: localhost:5000/tekton-pipelines/console-java-simple
+    - name: INSECUREREGISTRY
+      value: "true"
+  - name: verify-digest
+    runAfter:
+    - jib-maven
+    params:
+    - name: digest
+      value: $(tasks.jib-maven.results.IMAGE_DIGEST)
+    taskSpec:
+      params:
+      - name: digest
+      steps:
+      - name: bash
+        image: ubuntu
+        script: |
+          echo $(params.digest)
+          case .$(params.digest) in
+            ".sha"*) exit 0 ;;
+            *)       echo "Digest value is not correct" && exit 1 ;;
+          esac
+---
+apiVersion: tekton.dev/v1beta1
+kind: PipelineRun
+metadata:
+  name: jib-maven-test-pipeline-run
+spec:
+  pipelineRef:
+    name: jib-maven-test-pipeline
+  workspaces:
+  - name: shared-workspace
+    persistentvolumeclaim:
+      claimName: jib-maven-source-pvc