sbt#1178 attempt at adding in rpm epochs

Author: Ophirr33

integration-tests-ansible/test-project-play-rpm/packaging.sbt

@@ -28,3 +28,5 @@ rpmRelease := "1"
 rpmVendor := "DemoVendor"
 
 rpmLicense := Some("Apache-2.0")
+
+rpmEpoch := 1

src/main/scala/com/typesafe/sbt/packager/rpm/RpmMetadata.scala

@@ -18,7 +18,8 @@ case class RpmMetadata(name: String,
                        summary: String,
                        description: String,
                        autoprov: String,
-                       autoreq: String)
+                       autoreq: String,
+                       epoch: Int)
 
 /**
   * The Description used to generate an RPM
@@ -222,6 +223,7 @@ case class RpmSpec(meta: RpmMetadata,
     sb append ("Version: %s\n" format meta.version)
     sb append ("Release: %s\n" format meta.release)
     sb append ("Summary: %s\n" format meta.summary)
+    sb append ("Epoch: %d\n" format meta.epoch)
     meta.prefix foreach { v =>
       sb append ("prefix: %s\n" format v)
     }

src/main/scala/com/typesafe/sbt/packager/rpm/RpmPlugin.scala

@@ -69,6 +69,7 @@ object RpmPlugin extends AutoPlugin {
     rpmPrefix := None,
     rpmVendor := "", // TODO - Maybe pull in organization?
     rpmLicense := None,
+    rpmEpoch := 0,
     rpmDistribution := None,
     rpmUrl := None,
     rpmGroup := None,
@@ -121,7 +122,8 @@ object RpmPlugin extends AutoPlugin {
       (packageSummary in Rpm).value,
       (packageDescription in Rpm).value,
       rpmAutoprov.value,
-      rpmAutoreq.value
+      rpmAutoreq.value,
+      rmpEpoch.value
     ),
     rpmDescription := RpmDescription(
       rpmLicense.value,

src/sphinx/formats/rpm.rst

@@ -123,6 +123,12 @@ Informational Settings
   ``rpmLicense``
     The license associated with software in the RPM.
 
+  ``rpmEpoch``
+    The epoch is the most significant number used when resolving different versions
+    for the same RPM. For a given package, packages with the highest epoch will be
+    used, and in the event of a tie it will fall back to comparing the version and
+    release.
+
 Dependency Settings
 ~~~~~~~~~~~~~~~~~~~