Add support for Jenkins Gating property

https: //github.com/jenkinsci/gating-core-plugin
Change-Id: Ia649fe13e3add2c8d6125b775e376621d9d0408d

jenkins_jobs/modules/properties.py

@@ -1259,6 +1259,41 @@ def disable_resume(registry, xml_parent, data):
     )
 
 
+def resource_gating(registry, xml_parent, data):
+    """yaml: resource-gating
+    Jenkins Gating enables requiring external resources to be available before
+    build starts.
+
+    Requires the Jenkins: :jenkins-plugins:`Jenkins Gating <gating-core>`.
+
+    :arg list resources: Resource identifiers to be up before building
+
+    Example:
+
+    .. literalinclude:: /../../tests/properties/fixtures/gating-core.yaml
+        :language: yaml
+    """
+    if "resources" not in data.keys():
+        raise MissingAttributeError("resources")
+
+    gating = XML.SubElement(
+        xml_parent, "io.jenkins.plugins.gating.ResourceRequirementProperty"
+    )
+    gating.set("plugin", "gating-core")
+
+    resources = XML.SubElement(gating, "resources")
+    resources.set("class", "java.util.Collections$UnmodifiableRandomAccessList")
+    resources.set("resolves-to", "java.util.Collections$UnmodifiableList")
+
+    c = XML.SubElement(resources, "c")
+    c.set("class", "list")
+    for resource in data["resources"]:
+        XML.SubElement(c, "string").text = str(resource)
+
+    lst = XML.SubElement(resources, "list")
+    lst.set("reference", "../c")
+
+
 def cachet_gating(registry, xml_parent, data):
     """yaml: cachet-gating
     The Cachet Gating Plugin provides a gating mechanism

tests/properties/fixtures/gating-core.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<project>
+  <properties>
+    <io.jenkins.plugins.gating.ResourceRequirementProperty plugin="gating-core">
+      <resources class="java.util.Collections$UnmodifiableRandomAccessList" resolves-to="java.util.Collections$UnmodifiableList">
+        <c class="list">
+          <string>external/ci.example.com</string>
+          <string>foo/bar/baz</string>
+        </c>
+        <list reference="../c"/>
+      </resources>
+    </io.jenkins.plugins.gating.ResourceRequirementProperty>
+  </properties>
+</project>

tests/properties/fixtures/gating-core.yaml

@@ -0,0 +1,5 @@
+properties:
+    - resource-gating:
+        resources:
+            - external/ci.example.com
+            - foo/bar/baz