feat(surf): add surf ci provider

source/ci_source/providers/Surf.ts

@@ -0,0 +1,32 @@
+import { Env, CISource } from "../ci_source"
+import { ensureEnvKeysExist, ensureEnvKeysAreInt } from "../ci_source_helpers"
+
+export class Surf implements CISource {
+  constructor(private readonly env: Env) {
+  }
+
+  get name(): string {
+    return "surf-build"
+  }
+
+  get isCI(): boolean {
+    return ensureEnvKeysExist(this.env, ["SURF_REPO", "SURF_NWO"])
+  }
+
+  get isPR(): boolean {
+    return this.isCI
+  }
+
+  get pullRequestID(): string {
+    const key = "SURF_PR_NUM"
+    return ensureEnvKeysAreInt(this.env, [key]) ? this.env[key] : ""
+  }
+
+  get repoSlug(): string {
+    return this.env["SURF_NWO"]
+  }
+
+  get supportedPlatforms(): string[] {
+    return ["github"]
+  }
+}

source/ci_source/providers/index.ts

@@ -3,8 +3,9 @@ import {Circle} from "./Circle"
 import {Semaphore} from "./Semaphore"
 import {Jenkins} from "./Jenkins"
 import {FakeCI} from "./Fake"
+import {Surf} from "./Surf"
 
-const providers: Array<any> = [Travis, Circle, Semaphore, Jenkins, FakeCI]
+const providers: Array<any> = [Travis, Circle, Semaphore, Jenkins, FakeCI, Surf]
 export {
   providers
 };