Allow use of a RepositoryRef when creating a CodeCommitSoureAction (#758

)

When trying to use an imported CodeCommit repository (e.g. from a separate stack), one needs to
be able to create the source action using a `RepositoryRef` and not a `Repository`. In order for this
to work, the repository clone URLs needed to be made available on the `RepositoryRef` class.

packages/@aws-cdk/aws-codebuild/lib/source.ts

@@ -37,7 +37,7 @@ export class NoSource extends BuildSource {
  * CodeCommit Source definition for a CodeBuild project
  */
 export class CodeCommitSource extends BuildSource {
-    constructor(private readonly repo: codecommit.Repository) {
+    constructor(private readonly repo: codecommit.RepositoryRef) {
         super();
     }
 

packages/@aws-cdk/aws-codecommit/lib/repository.ts

@@ -43,6 +43,10 @@ export abstract class RepositoryRef extends cdk.Construct {
 
     /** The human-visible name of this Repository. */
     public abstract readonly repositoryName: string;
+    /** The HTTP clone URL */
+    public abstract readonly repositoryCloneUrlHttp: string;
+    /** The SSH clone URL */
+    public abstract readonly repositoryCloneUrlSsh: string;
 
     /**
      * Exports this Repository. Allows the same Repository to be used in 2 different Stacks.
@@ -182,6 +186,23 @@ class ImportedRepositoryRef extends RepositoryRef {
         });
         this.repositoryName = props.repositoryName;
     }
+
+    public get repositoryCloneUrlHttp() {
+        return this.repositoryCloneUrl('https');
+    }
+
+    public get repositoryCloneUrlSsh() {
+        return this.repositoryCloneUrl('ssh');
+    }
+
+    private repositoryCloneUrl(protocol: 'https' | 'ssh'): string {
+        return new cdk.FnConcat(`${protocol}://git-codecommit.`,
+                                new cdk.AwsRegion(),
+                                '.',
+                                new cdk.AwsURLSuffix(),
+                                '/v1/repos/',
+                                this.repositoryName).toString();
+    }
 }
 
 export interface RepositoryProps {