Fixes #8 Add support for draft release updating

src/Action.ts

@@ -29,8 +29,8 @@ export class Action {
                 const getResponse = await this.releases.getByTag(this.inputs.tag)
                 return await this.updateRelease(getResponse.data.id)
             } catch (error) {
-                if (this.noRelease(error)) {
-                    return await this.createRelease()
+                if (this.noPublishedRelease(error)) {
+                    return await this.updateDraftOrCreateRelease()
                 } else {
                     throw error
                 }
@@ -40,24 +40,6 @@ export class Action {
         }
     }
 
-    private async createRelease(): Promise<string> {
-        const response = await this.releases.create(
-            this.inputs.tag,
-            this.inputs.body,
-            this.inputs.commit,
-            this.inputs.draft,
-            this.inputs.name,
-            this.inputs.prerelease
-        )
-
-        return response.data.upload_url
-    }
-
-    private noRelease(error: any): boolean {
-        const errorMessage = new ErrorMessage(error)
-        return errorMessage.status == 404
-    }
-
     private async updateRelease(id: number): Promise<string> {
         const response = await this.releases.update(
             id,
@@ -71,4 +53,40 @@ export class Action {
 
         return response.data.upload_url
     }
+
+    private noPublishedRelease(error: any): boolean {
+        const errorMessage = new ErrorMessage(error)
+        return errorMessage.status == 404
+    }
+
+    private async updateDraftOrCreateRelease(): Promise<string> {
+        const draftReleaseId = await this.findMatchingDraftReleaseId()
+        if (draftReleaseId) {
+            return await this.updateRelease(draftReleaseId)
+        } else {
+            return await this.createRelease()
+        }
+    }
+
+    private async findMatchingDraftReleaseId(): Promise<number | undefined> {
+        const tag = this.inputs.tag
+        const response = await this.releases.listReleases()
+        const releases = response.data
+        const draftRelease = releases.find(release => release.draft && release.tag_name == tag)
+
+        return draftRelease?.id
+    }
+
+    private async createRelease(): Promise<string> {
+        const response = await this.releases.create(
+            this.inputs.tag,
+            this.inputs.body,
+            this.inputs.commit,
+            this.inputs.draft,
+            this.inputs.name,
+            this.inputs.prerelease
+        )
+
+        return response.data.upload_url
+    }
 }

src/Releases.ts

@@ -1,6 +1,6 @@
 import { Context } from "@actions/github/lib/context";
 import { GitHub } from "@actions/github";
-import { AnyResponse, Response, ReposCreateReleaseResponse, ReposGetReleaseByTagResponse } from "@octokit/rest";
+import { AnyResponse, Response, ReposCreateReleaseResponse, ReposGetReleaseByTagResponse, ReposListReleasesResponse } from "@octokit/rest";
 
 export interface Releases {
     create(
@@ -14,6 +14,8 @@ export interface Releases {
 
     getByTag(tag: string): Promise<Response<ReposGetReleaseByTagResponse>>
 
+    listReleases(): Promise<Response<ReposListReleasesResponse>>
+
     update(
         id: number,
         tag: string,
@@ -62,6 +64,13 @@ export class GithubReleases implements Releases {
         })
     }
 
+    async listReleases(): Promise<Response<ReposListReleasesResponse>> {
+        return this.git.repos.listReleases({
+            owner: this.context.repo.owner,
+            repo: this.context.repo.repo
+        })
+    }
+
     async getByTag(tag: string): Promise<Response<ReposGetReleaseByTagResponse>> {
         return this.git.repos.getReleaseByTag({
             owner: this.context.repo.owner,