Update manifest file creation

It is annoying to update both the sbt version and the manifest version,
therefore the manifest version is now updated automatically.

META-INF/MANIFEST.MF → MANIFEST.MF.prototype

@@ -2,7 +2,7 @@ Manifest-Version: 1.0
 Bundle-ManifestVersion: 2
 Bundle-Name: Scala Refactoring
 Bundle-SymbolicName: org.scala-refactoring.library
-Bundle-Version: 0.14.0.qualifier
+Bundle-Version: version.qualifier
 Require-Bundle: org.junit;bundle-version="4.11.0",
  org.scala-lang.scala-library
 Export-Package: scala.tools.refactoring,scala.tools.refactoring.analys

build.sbt

@@ -107,20 +107,29 @@ credentials ++= {
 }
 
 // sbt doesn't automatically load the content of the MANIFST.MF file, therefore
-// we have to do it here by ourselves Furthermore, the version format in the
-// MANIFEST.MF is `x.y.z.qualifier` but we need to replace the `qualifier` part
-// with a unique identifier otherwise OSGi can't find out which nightly build
-// is newest and therefore not all caches are updated with the correct version
-// of a nightly.
+// we have to do it here by ourselves. Furthermore, the version format in the
+// MANIFEST.MF is `version.qualifier`, which means that we have to replace
+// `version` by the actual version and `qualifier` with a unique identifier
+// otherwise OSGi can't find out which nightly build is newest and therefore
+// not all caches are updated with the correct version of a nightly.
 packageOptions in Compile in packageBin += {
-  val m = Using.fileInputStream(new java.io.File("META-INF/MANIFEST.MF")) { in =>
+  val m = Using.fileInputStream(new java.io.File("MANIFEST.MF.prototype")) { in =>
     val manifest = new java.util.jar.Manifest(in)
     val attr = manifest.getMainAttributes
     val key = "Bundle-Version"
     val versionSuffix = scalaBinaryVersion.value.replace('.', '_')
+    // get the version but get rid of "-SNAPSHOT" suffix if it exists
+    val v = {
+      val v = version.value
+      val i = v.lastIndexOf('-')
+      if (i > 0)
+        v.substring(0, i)
+      else
+        v
+    }
     val date = new java.text.SimpleDateFormat("yyyyMMddHHmm").format(new java.util.Date)
     val sha = "git rev-parse --short HEAD".!!.trim
-    attr.putValue(key, attr.getValue(key).replace("qualifier", s"$versionSuffix-$date-$sha"))
+    attr.putValue(key, attr.getValue(key).replace("version.qualifier", s"$v.$versionSuffix-$date-$sha"))
     manifest
   }
   Package.JarManifest(m)