Merge pull request #1332 from ivankatliarchuk/issue_1330

Gitlab: added environment variable DANGER_SKIP_WHEN_EMPTY

Author: orta

CHANGELOG.md

@@ -16,8 +16,8 @@
 
 <!-- Your comment below this -->
 - Append random string to danger-results.json and danger-dsl.json files to better support concurrent processes #1311
-
-- Gitlab package moved to a new home "@gitbreaker/*" [#1301](https://github.com/danger/danger-js/issues/1301)  [@ivankatliarchuk]
+- Gitlab: add support for skipping remove of messages when empty [#1330](https://github.com/danger/danger-js/issues/1330) [@ivankatliarchuk]
+- Gitlab: package moved to a new home "@gitbreaker/*" [#1301](https://github.com/danger/danger-js/issues/1301) [@ivankatliarchuk]
 - GitLab: Improve support for MRs from forks [#1319](https://github.com/danger/danger-js/pull/1319) [@ivankatliarchuk]
 - GitLab: Added provider tests [#1319](https://github.com/danger/danger-js/pull/1319) [@ivankatliarchuk]
 

source/commands/danger-process.ts

@@ -49,7 +49,7 @@ program.action(process_name => (subprocessName = process_name)).parse(process.ar
 
 // The dynamic nature of the program means typecasting a lot
 // use this to work with dynamic properties
-const app = (program as any) as SharedCLI
+const app = program as any as SharedCLI
 
 if (process.env["DANGER_VERBOSE"] || app.verbose) {
   global.verbose = true
@@ -67,7 +67,7 @@ getRuntimeCISource(app).then(source => {
     if (!platform) {
       console.log(chalk.red(`Could not find a source code hosting platform for ${source.name}.`))
       console.log(
-        `Currently Danger JS only supports GitHub and BitBucket Server, if you want other platforms, consider the Ruby version or help out.`
+        `Platform '${source.name}' is not supported with Danger JS, if you want other platforms, consider the Ruby version or help out.`
       )
       process.exitCode = 1
     }

source/platforms/gitlab/_tests/_gitlab_api.test.ts

@@ -181,9 +181,9 @@ describe("GitLab API", () => {
         expected: "",
       },
     ]
-    for (let el in parameters) {
-      let result = await api.getFileContents(parameters[el].filePath, api.repoMetadata.repoSlug, parameters[el].ref)
-      expect(result).toContain(parameters[el].expected)
+    for (let el of parameters) {
+      let result = await api.getFileContents(el.filePath, api.repoMetadata.repoSlug, el.ref)
+      expect(result).toContain(el.expected)
     }
     nockDone()
   })

source/runner/Executor.ts

@@ -262,16 +262,22 @@ export class Executor {
     let issueURL = undefined
 
     if (!hasMessages || this.options.removePreviousComments) {
-      if (!hasMessages) {
-        this.log(`Found no issues or messages from Danger. Removing any existing messages on ${this.platform.name}.`)
+      if (process.env["DANGER_SKIP_WHEN_EMPTY"] === "true") {
+        this.log(`Skip posting to platform ${this.platform.name}.`)
       } else {
-        this.log(`'removePreviousComments' option specified. Removing any existing messages on ${this.platform.name}.`)
-      }
-      await this.platform.deleteMainComment(dangerID)
-      const previousComments = await this.platform.getInlineComments(dangerID)
-      for (const comment of previousComments) {
-        if (comment && comment.ownedByDanger) {
-          await this.deleteInlineComment(comment)
+        if (!hasMessages) {
+          this.log(`Found no issues or messages from Danger. Removing any existing messages on ${this.platform.name}.`)
+        } else {
+          this.log(
+            `'removePreviousComments' option specified. Removing any existing messages on ${this.platform.name}.`
+          )
+        }
+        await this.platform.deleteMainComment(dangerID)
+        const previousComments = await this.platform.getInlineComments(dangerID)
+        for (const comment of previousComments) {
+          if (comment && comment.ownedByDanger) {
+            await this.deleteInlineComment(comment)
+          }
         }
       }
     }

source/runner/_tests/_executor.test.ts

@@ -112,6 +112,28 @@ describe("setup", () => {
     expect(platform.deleteMainComment).toBeCalled()
   })
 
+  it("Configure to Skip a post deletion when there are no messages", async () => {
+    const platform = new FakePlatform()
+    const exec = new Executor(new FakeCI({}), platform, inlineRunner, defaultConfig, new FakeProcces())
+    let parameters: { skip: boolean; times: number }[] = [
+      { skip: true, times: 0 },
+      { skip: false, times: 1 },
+    ]
+    for (let el of parameters) {
+      if (el.skip) {
+        process.env.DANGER_SKIP_WHEN_EMPTY = "true"
+      } else {
+        process.env.DANGER_SKIP_WHEN_EMPTY = "false"
+      }
+      const dsl = await defaultDsl(platform)
+      platform.deleteMainComment = jest.fn()
+      await exec.handleResults(emptyResults, dsl.git)
+
+      expect(process.env.DANGER_SKIP_WHEN_EMPTY).toBeDefined()
+      expect(platform.deleteMainComment).toBeCalledTimes(el.times)
+    }
+  })
+
   it("Deletes a post when 'removePreviousComments' option has been specified", async () => {
     const platform = new FakePlatform()
     const exec = new Executor(