Don't create secret project unless GITHUB_PERSONAL_ACCESS_TOKEN is set

Author: Atry

secret.sbt

@@ -1,16 +1,19 @@
-lazy val secret = project.settings(publishArtifact := false).in {
-  val secretDirectory = file(sourcecode.File()).getParentFile / "secret"
-  for (token <- sys.env.get("GITHUB_PERSONAL_ACCESS_TOKEN")) {
-    IO.delete(secretDirectory)
-    org.eclipse.jgit.api.Git
-      .cloneRepository()
-      .setURI("https://github.com/ThoughtWorksInc/tw-data-china-continuous-delivery-password.git")
-      .setDirectory(secretDirectory)
-      .setCredentialsProvider(
-        new org.eclipse.jgit.transport.UsernamePasswordCredentialsProvider(token, "")
-      )
-      .call()
-      .close()
+lazy val secret = {
+  for (token <- sys.env.get("GITHUB_PERSONAL_ACCESS_TOKEN")) yield {
+    val secret = project.settings(publishArtifact := false).in {
+      val secretDirectory = file(sourcecode.File()).getParentFile / "secret"
+      IO.delete(secretDirectory)
+      org.eclipse.jgit.api.Git
+        .cloneRepository()
+        .setURI("https://github.com/ThoughtWorksInc/tw-data-china-continuous-delivery-password.git")
+        .setDirectory(secretDirectory)
+        .setCredentialsProvider(
+          new org.eclipse.jgit.transport.UsernamePasswordCredentialsProvider(token, "")
+        )
+        .call()
+        .close()
+      secretDirectory
+    }
+    secret
   }
-  secretDirectory
-}
+}.getOrElse(null)