Suppress error when GITHUB_PERSONAL_ACCESS_TOKEN is not present

Author: Atry

deploy.sbt.disabled

@@ -2,15 +2,17 @@ enablePlugins(Travis)
 
 lazy 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(sys.env("GITHUB_PERSONAL_ACCESS_TOKEN"), "")
-    )
-    .call()
-    .close()
+  sys.env.get("GITHUB_PERSONAL_ACCESS_TOKEN").foreach { 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(sys.env.get(token, "")
+      )
+      .call()
+      .close()
+  }
   secretDirectory
 }