binary jar: publish script should sign artifacts

The publish script for the binary jar needs to sign each artifact before
it can be released in a non-snapshot repository. This patch changes the
script to sign the artifacts when invoking it in deploy mode.

Additional changes:

* Default to the release staging repo instead of the snapshot repo
* Fix some script comments

Change-Id: I205765a6a9bedba11a7c96d5a56435f7aed5071e
Reviewed-on: http://gerrit.cloudera.org:8080/12691
Tested-by: Kudu Jenkins
Reviewed-by: Grant Henke <[email protected]>

build-support/mini-cluster/publish_mini_cluster_binaries.sh

@@ -27,13 +27,12 @@
 #   -a, --action: (default "install")
 #     Either install or deploy. If install, the jars will be
 #     installed into the local Maven repository. If deploy, the jars
-#     will be deployed to the remote Maven repository defined by MVN_REPO_URL.
+#     will be deployed to the remote Maven repository specified by --repo.
 #
 #   -j, --jars: (default "build/mini-cluster")
-#    Defines the Maven repository url to deploy to.
-#     Only used when the --action is deploy.
+#     Specifies the directory where the jars to be published are located.
 #
-#   -r, --repo: (default "https://repository.apache.org/content/repositories/snapshots")
+#   -r, --repo: (default "https://repository.apache.org/service/local/staging/deploy/maven2/")
 #     Defines the Maven repository url to deploy to.
 #     Only used when the --action is deploy.
 #
@@ -48,9 +47,13 @@
 #   --skipPom:
 #     If this flag is passed, the pom is not published.
 #
-# Example:
+# Example to stage binaries for a release:
 #   publish_mini_cluster_binaries.sh -a=deploy -u="foo-user" -p="foo-pass"
 #
+# Example to publish to the snapshot repository:
+#   publish_mini_cluster_binaries.sh -a=deploy -u="foo-user" -p="foo-pass" \
+#     -r=https://repository.apache.org/content/repositories/snapshots
+#
 ################################################################################
 set -e
 
@@ -61,7 +64,7 @@ VERSION=$(cat ${SOURCE_ROOT}/version.txt)
 # Set the parameter defaults.
 MVN_ACTION="install"
 JAR_PATH="$BUILD_ROOT"
-MVN_REPO_URL="https://repository.apache.org/content/repositories/snapshots"
+MVN_REPO_URL="https://repository.apache.org/service/local/staging/deploy/maven2/"
 PUBLISH_POM=1
 
 # Parse the command line parameters.
@@ -161,7 +164,7 @@ function maven_action() {
     ARGS="$ARGS -DrepositoryId=apache"
     ARGS="$ARGS -Drepo.username=$MVN_USERNAME"
     ARGS="$ARGS -Drepo.password=$MVN_PASSWORD"
-    mvn deploy:deploy-file ${ARGS}
+    mvn gpg:sign-and-deploy-file ${ARGS}
   fi
 }