Fixes #267 Add ActionSkipper

src/ActionSkipper.ts

@@ -0,0 +1,27 @@
+import {Releases} from "./Releases";
+
+export interface ActionSkipper {
+    shouldSkip(): Promise<boolean>
+}
+
+export class ReleaseActionSkipper {
+    constructor(private skipIfReleaseExists: boolean,
+                private releases: Releases,
+                private tag: string) {
+    }
+
+    async shouldSkip(): Promise<boolean> {
+        if (!this.skipIfReleaseExists) {
+            // Bail if skip flag isn't set.
+            return false;
+        }
+
+        try {
+            const getResponse = await this.releases.getByTag(this.tag)
+            return getResponse.data != null
+        } catch (error: any) {
+            // There is either no release or something else went wrong. Either way, run the action.
+            return false;
+        }
+    }
+}