Merge pull request #956 from RDIL/master

Add Cirrus CI support

source/ci_source/providers/Cirrus.ts

@@ -0,0 +1,50 @@
+import { Env, CISource } from "../ci_source"
+import { ensureEnvKeysExist, ensureEnvKeysAreInt } from "../ci_source_helpers"
+
+/**
+ * ### CI Setup
+ *
+ *  You need to edit your `.cirrus.yml` to add a `script` like this:
+ *
+ *   ```yaml
+ *     danger_script:
+ *       - yarn danger ci
+ *   ```
+ *
+ *  ### Token Setup
+ *
+ *  You need to add the `DANGER_GITHUB_API_TOKEN` environment variable, to do this,
+ *  go to your repo's settings, by clicking the gear at `https://cirrus-ci.com/github/[user]/[repo]`.
+ *  Generate the encrypted value, and add it to your `env` block.
+ *
+ *  Once you have added it, trigger a build.
+ */
+export class Cirrus implements CISource {
+  constructor(private readonly env: Env) {}
+
+  get name(): string {
+    return "Cirrus CI"
+  }
+
+  get isCI(): boolean {
+    return ensureEnvKeysExist(this.env, ["CIRRUS_CI"])
+  }
+
+  get isPR(): boolean {
+    const mustHave = ["CIRRUS_CI", "CIRRUS_PR", "CIRRUS_REPO_FULL_NAME"]
+    const mustBeInts = ["CIRRUS_PR"]
+    return ensureEnvKeysExist(this.env, mustHave) && ensureEnvKeysAreInt(this.env, mustBeInts)
+  }
+
+  get pullRequestID(): string {
+    return this.env.CIRRUS_PR
+  }
+
+  get repoSlug(): string {
+    return this.env.CIRRUS_REPO_FULL_NAME
+  }
+
+  get ciRunURL() {
+    return `https://cirrus-ci.com/task/${this.env.CIRRUS_TASK_ID}`
+  }
+}

source/ci_source/providers/index.ts

@@ -23,6 +23,7 @@ import { TeamCity } from "./TeamCity"
 import { Travis } from "./Travis"
 import { VSTS } from "./VSTS"
 import { BitbucketPipelines } from "./BitbucketPipelines"
+import { Cirrus } from "./Cirrus"
 
 const providers = [
   FakeCI,
@@ -50,6 +51,7 @@ const providers = [
   Codefresh,
   AppCenter,
   BitbucketPipelines,
+  Cirrus,
 ]
 
 // Mainly used for Dangerfile linting
@@ -76,6 +78,7 @@ const realProviders = [
   CodeBuild,
   Codefresh,
   AppCenter,
+  Cirrus
 ]
 
 export { providers, realProviders }