wip gitlab: adapts the release process to Gitlab

Author: Juan José Vázquez

core/src/main/scala/Config.scala

@@ -784,7 +784,7 @@ object Config {
       cfg.require[String]("client-secret"),
       cfg.require[String]("redirect-uri"),
       cfg.require[String]("scope"),
-      AccessToken(cfg.require[String]("access-token")),
+      AccessToken(cfg.require[String]("access-token"), isPrivate = true),
       cfg.require[String]("system-username"),
       cfg.lookup[List[String]]("organization-blacklist").getOrElse(Nil),
       cfg.lookup[List[String]]("organization-admins").getOrElse(Nil)

core/src/main/scala/Gitlab.scala

@@ -113,7 +113,7 @@ object Gitlab {
         }.flatMap { release =>
           if (release.assets.isEmpty)
             Task.fail(new IllegalArgumentException(
-              s"The tag `$releaseId` for repo `$slug` is not a valid release. " +
+              s"The tag '$releaseId' for repo '$slug' is not a valid release. " +
                 "Have you added an asset as release description?"
             ))
           else

core/src/main/scala/Json.scala

@@ -258,6 +258,7 @@ object Json {
    */
   implicit lazy val GithubEventDecoder: DecodeJson[Github.Event] =
     GithubReleaseEventDecoder.asInstanceOf[DecodeJson[Github.ReleaseEvent]] |||
+    GitlabReleaseEventDecoder.asInstanceOf[DecodeJson[Github.ReleaseEvent]] |||
     GithubPingEventDecoder.asInstanceOf[DecodeJson[Github.Event]]
 
   /**
@@ -514,6 +515,16 @@ object Json {
       )
     })
 
+  implicit val GitlabReleaseEventDecoder: DecodeJson[Github.ReleaseEvent] =
+    DecodeJson(z => for {
+      a <- (z --\ "ref").as[String]
+      i = a.split('/').last
+      p <- (z --\ "project" --\ "path_with_namespace").as[String]
+      x <- Slug.fromString(p).map(DecodeResult.ok
+           ).valueOr(e => DecodeResult.fail(e.getMessage,z.history))
+      e <- (z --\ "project_id").as[Long]
+    } yield Github.ReleaseEvent(id = i, slug = x, repositoryId = e))
+
   /**
    * {
    *   "url": "https://github.example.com/api/v3/repos/example/howdy/releases/assets/1",