Fixes #1 Allow for multiple artifacts

src/ArtifactGlobber.ts

@@ -0,0 +1,22 @@
+import { Globber, FileGlobber } from "./Globber";
+import { Artifact } from "./Artifact";
+
+export interface ArtifactGlobber {
+    globArtifactString(artifact: string, contentType: string): Artifact[]
+}
+
+export class FileArtifactGlobber implements ArtifactGlobber {
+    private globber: Globber
+
+    constructor(globber: Globber = new FileGlobber()) {
+        this.globber = globber
+    }
+
+    globArtifactString(artifact: string, contentType: string): Artifact[] {
+        return artifact.split(',')
+            .map((path) => this.globber.glob(path))
+            .reduce((accumulated, current) => accumulated.concat(current))
+            .map((path) => new Artifact(path, contentType))
+    }
+}
+