[3/3] kudu git commit: Add protobuf generated files to Eclipse project classpath.

[gr...@apache.org]

Add protobuf generated files to Eclipse project classpath.

With this change Eclipse can compile all Kudu Java projects
and can run JUnit tests directly

Change-Id: I825002ce8436467cb9c32c0954f378e1959a5586
Reviewed-on: http://gerrit.cloudera.org:8080/11310
Reviewed-by: Grant Henke <gr...@apache.org>
Tested-by: Grant Henke <gr...@apache.org>


Project: http://git-wip-us.apache.org/repos/asf/kudu/repo
Commit: http://git-wip-us.apache.org/repos/asf/kudu/commit/f5ffcb4d
Tree: http://git-wip-us.apache.org/repos/asf/kudu/tree/f5ffcb4d
Diff: http://git-wip-us.apache.org/repos/asf/kudu/diff/f5ffcb4d

Branch: refs/heads/master
Commit: f5ffcb4d7b2ebd2ca134f9a72c396c82ffcb36b4
Parents: 1308db9
Author: Greg Solovyev <gs...@cloudera.com>
Authored: Thu Aug 23 15:37:36 2018 -0700
Committer: Grant Henke <gr...@apache.org>
Committed: Mon Aug 27 19:31:48 2018 +0000

----------------------------------------------------------------------
 java/gradle/protobuf.gradle | 23 +++++++++++++++++++++--
 1 file changed, 21 insertions(+), 2 deletions(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/kudu/blob/f5ffcb4d/java/gradle/protobuf.gradle
----------------------------------------------------------------------
diff --git a/java/gradle/protobuf.gradle b/java/gradle/protobuf.gradle
index f3d84bc..5bcabd3 100644
--- a/java/gradle/protobuf.gradle
+++ b/java/gradle/protobuf.gradle
@@ -16,7 +16,7 @@
 // under the License.
 
 // This file contains the common protobuf plugin configuration.
-
+import org.gradle.plugins.ide.eclipse.model.SourceFolder
 apply plugin: "com.google.protobuf"
 
 // Use the maven protoc artifact instead of local.
@@ -31,4 +31,23 @@ idea {
   module {
     generatedSourceDirs += file("${protobuf.generatedFilesBaseDir}/main/java")
   }
-}
\ No newline at end of file
+}
+
+// Configure Eclipse to see the generated classes.
+eclipse {
+  classpath {
+    file {
+      whenMerged {
+         // protobuf.generatedFilesBaseDir contains absolute path to the root project.
+         // Here we have to make the path relative to a subproject,
+         // because Buildship ignores absolute paths when it evaluates classpath entries.
+
+         // Passing 'null' as a second argument to SourceFolder constructor
+         // instructs Eclipse to not compile generated source files
+         def relPath = projectDir.toPath().relativize(
+           file("${protobuf.generatedFilesBaseDir}/main/java").toPath())
+         entries += new SourceFolder(relPath.toString(), null)
+      }
+    }
+  }
+}