Fixes #708. Refs #571.

Output from Nimble scripts' top-level statements is now
only visible with --verbose.

tests/issue708/issue708.nimble

@@ -0,0 +1,17 @@
+# Package
+
+version       = "0.1.0"
+author        = "Dominik Picheta"
+description   = "A new awesome nimble package"
+license       = "MIT"
+srcDir        = "src"
+
+
+
+# Dependencies
+
+requires "nim >= 0.16.0"
+
+
+echo "hello"
+echo "hello2"

tests/issue708/src/issue708.nim

@@ -0,0 +1,7 @@
+# This is just an example to get you started. A typical library package
+# exports the main API in this file. Note that you cannot rename this file
+# but you can remove it if you wish.
+
+proc add*(x, y: int): int =
+  ## Adds two files together.
+  return x + y

tests/tester.nim

@@ -79,9 +79,19 @@ proc hasLineStartingWith(lines: seq[string], prefix: string): bool =
       return true
   return false
 
+test "issue 708":
+  cd "issue708":
+    # TODO: We need a way to filter out compiler messages from the messages
+    # written by our nimble scripts.
+    var (output, exitCode) = execNimble("install", "-y", "--verbose")
+    check exitCode == QuitSuccess
+    let lines = output.strip.processOutput()
+    check(inLines(lines, "hello"))
+    check(inLines(lines, "hello2"))
+
 test "issue 564":
   cd "issue564":
-    var (output, exitCode) = execNimble("build")
+    var (_, exitCode) = execNimble("build")
     check exitCode == QuitSuccess
 
 test "depsOnly + flag order test":