Working on jar creation infrastructure.

output generation (but only then, since otherwise we're not creating the
jar):

  1) -Xmain-class foo.Bar will give the jar a Main-Class of foo.Bar 2)
  Alternatively, if there is only one runnable program, that will be
  the Main-Class 3) Always, the jar's manifest will have an entry for
  Scala-Compiler-Version.

Not very relatedly, a warning is now issued when a module has a main
method but a runnable program will not be generated. Closes SI-4861.

This represents an opening step toward automatically recognizing
mismatched bytecode situations: coarse, but useful and safe. Review by
mirco.

1 files changed, 45 insertions, 0 deletions

diff --git a/test/files/neg/main1.scala b/test/files/neg/main1.scala
new file mode 100644
index 0000000000..2b5551ac38
--- /dev/null
+++ b/test/files/neg/main1.scala
@@ -0,0 +1,45 @@
+// negatives
+package foo1 {
+  object Foo {  // companion is trait
+    def main(args: Array[String]): Unit = ()
+  }
+  trait Foo
+}
+
+package foo2 {
+  object Foo {  // companion has its own main
+    def main(args: Array[String]): Unit = ()
+  }
+  class Foo {
+    def main(args: Array[String]): Unit = ()
+  }
+}
+
+// these should all be made to work, but are negatives for now
+// because forwarders need more work.
+
+package foo3 {
+  object Foo {  // Companion contains main, but not an interfering main.
+    def main(args: Array[String]): Unit = ()
+  }
+  class Foo {
+    def main(args: Int): Unit = ()
+  }
+}
+
+package foo4 {
+  object Foo extends Foo {  // Inherits main from the class
+  }
+  class Foo {
+    def main(args: Array[String]): Unit = ()
+  }
+}
+
+package foo5 {
+  object Foo extends Foo {  // Overrides main from the class
+    override def main(args: Array[String]): Unit = ()
+  }
+  class Foo {
+    def main(args: Array[String]): Unit = ()
+  }
+}