Add CI integration for Concourse

source/ci_source/providers/Concourse.ts

@@ -0,0 +1,37 @@
+import { Env, CISource } from "../ci_source"
+import { ensureEnvKeysExist, ensureEnvKeysAreInt } from "../ci_source_helpers"
+
+/**
+ * Concourse CI Integration
+ *
+ * https://concourse-ci.org/
+ */
+export class Concourse implements CISource {
+  constructor(private readonly env: Env) {}
+
+  get name(): string {
+    return "Concourse"
+  }
+
+  get isCI(): boolean {
+    return ensureEnvKeysExist(this.env, ["CONCOURSE"])
+  }
+
+  get isPR(): boolean {
+    const mustHave = ["PULL_REQUEST_ID", "REPO_SLUG"]
+    const mustBeInts = ["PULL_REQUEST_ID"]
+    return ensureEnvKeysExist(this.env, mustHave) && ensureEnvKeysAreInt(this.env, mustBeInts)
+  }
+
+  get pullRequestID(): string {
+    return this.env.PULL_REQUEST_ID
+  }
+
+  get repoSlug(): string {
+    return this.env.REPO_SLUG
+  }
+
+  get ciRunURL() {
+    return this.env.BUILD_URL
+  }
+}

source/ci_source/providers/_tests/_concourse.test.ts

@@ -0,0 +1,72 @@
+import { Concourse } from "../Concourse"
+import { getCISourceForEnv } from "../../get_ci_source"
+
+const correctEnv = {
+  CONCOURSE: "true",
+  REPO_SLUG: "danger/danger-js",
+  PULL_REQUEST_ID: "2",
+  BUILD_URL: "https://github.com/danger/danger-js/blob/master",
+}
+
+describe("being found when looking for CI", () => {
+  it("finds Concourse with the right ENV", () => {
+    const ci = getCISourceForEnv(correctEnv)
+    expect(ci).toBeInstanceOf(Concourse)
+  })
+})
+
+describe(".isCI", () => {
+  it("validates when all Concourse environment vars are set", () => {
+    const concourse = new Concourse(correctEnv)
+    expect(concourse.isCI).toBeTruthy()
+  })
+
+  it("does not validate without env", () => {
+    const concourse = new Concourse({})
+    expect(concourse.isCI).toBeFalsy()
+  })
+})
+
+describe(".isPR", () => {
+  it("validates when all Concourse environment vars are set", () => {
+    const concourse = new Concourse(correctEnv)
+    expect(concourse.isPR).toBeTruthy()
+  })
+
+  it("does not validate outside of Concourse", () => {
+    const concourse = new Concourse({})
+    expect(concourse.isPR).toBeFalsy()
+  })
+
+  const envs = ["CONCOURSE", "REPO_SLUG", "PULL_REQUEST_ID"]
+  envs.forEach((key: string) => {
+    let env = Object.assign({}, correctEnv)
+    env[key] = null
+
+    it(`does not validate when ${key} is missing`, () => {
+      const concourse = new Concourse({})
+      expect(concourse.isCI && concourse.isPR).toBeFalsy()
+    })
+  })
+
+  describe("repo slug", () => {
+    it("returns correct slug", () => {
+      const concourse = new Concourse(correctEnv)
+      expect(concourse.repoSlug).toEqual("danger/danger-js")
+    })
+  })
+
+  describe("pull request id", () => {
+    it("returns correct id", () => {
+      const concourse = new Concourse(correctEnv)
+      expect(concourse.pullRequestID).toEqual("2")
+    })
+  })
+
+  describe("build url", () => {
+    it("returns correct build url", () => {
+      const concourse = new Concourse(correctEnv)
+      expect(concourse.ciRunURL).toEqual("https://github.com/danger/danger-js/blob/master")
+    })
+  })
+})

source/ci_source/providers/index.ts

@@ -3,6 +3,7 @@ import { BuddyBuild } from "./BuddyBuild"
 import { Buildkite } from "./Buildkite"
 import { Circle } from "./Circle"
 import { Codeship } from "./Codeship"
+import { Concourse } from "./Concourse"
 import { DockerCloud } from "./DockerCloud"
 import { Drone } from "./Drone"
 import { FakeCI } from "./Fake"
@@ -32,6 +33,7 @@ const providers = [
   Bitrise,
   TeamCity,
   Screwdriver,
+  Concourse,
 ]
 
 // Mainly used for Dangerfile linting
@@ -50,6 +52,7 @@ const realProviders = [
   VSTS,
   TeamCity,
   Screwdriver,
+  Concourse,
 ]
 
 export { providers, realProviders }