feat: Added ingress annotator

ingress-annotator/ingress-annotator.star

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+#   Copyright IBM Corporation 2021
+#
+#   Licensed under the Apache License, Version 2.0 (the "License");
+#   you may not use this file except in compliance with the License.
+#   You may obtain a copy of the License at
+#
+#        http://www.apache.org/licenses/LICENSE-2.0
+#
+#   Unless required by applicable law or agreed to in writing, software
+#   distributed under the License is distributed on an "AS IS" BASIS,
+#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#   See the License for the specific language governing permissions and
+#   limitations under the License.
+# load("encoding/yaml", "yaml")
+
+# transform creates a new artifact of type "KubernetesYamlsWithAnnotatedIngress" which
+# has an annotation for ingress-class added to every ingress resource yaml created during
+# transformation
+def transform(new_artifacts, old_artifacts):
+    pathMappings = []
+    artifacts = []
+    for v in new_artifacts:
+        if v["artifact"] != "KubernetesYamls":
+            continue
+        if v['name'] != "Kubernetes":
+            continue
+        v["artifact"] = "KubernetesYamlsWithAnnotatedIngress"
+        artifacts.append(v)
+        yamlsPath = v["paths"]["KubernetesYamls"][0]
+        fileList = fs.readdir(yamlsPath)
+        for f in fileList:
+            filePath = fs.pathjoin(yamlsPath, f)
+            s = fs.read(filePath)
+            yamlData = yaml.loads(s)
+            if yamlData['kind'] != 'Ingress':
+                continue
+            md = yamlData['metadata']
+            d = {}
+            if 'annotations' in md:
+                d = md['annotations']
+            d["kubernetes.io/ingress.class"] = "haproxy"
+            md["annotations"] = d
+            yamlData['metadata'] = md
+            s = yaml.dumps(yamlData)
+            fs.write(filePath, s)
+            pathMappings.append({'type': 'Default', \
+            'sourcePath': yamlsPath, \
+            'destinationPath': fs.pathjoin("deploy", "yamls")})
+
+    return {'pathMappings': pathMappings, 'artifacts': artifacts}

ingress-annotator/ingress-annotator.yaml

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+apiVersion: move2kube.konveyor.io/v1alpha1
+kind: Transformer
+metadata:
+  name: IngressAnnotator
+spec:
+  mode: "Container"
+  class: "Starlark"
+  consumes:
+    - "KubernetesYamls"
+  config:
+    starFile: "ingress-annotator.star"