Script to check docker staging versions vs release

Change-Id: Icc73fe30ab65f90a513e77e814a0c2ea3e5f1d61
Issue-ID: INT-586
Signed-off-by: Gary Wu <gary.i.wu@huawei.com>
diff --git a/version-manifest/pom.xml b/version-manifest/pom.xml
index 27fb4f4..48dd9c1 100644
--- a/version-manifest/pom.xml
+++ b/version-manifest/pom.xml
@@ -150,6 +150,20 @@
             </configuration>
           </execution>
           <execution>
+            <id>compare-docker-manifests</id>
+            <phase>validate</phase>
+            <goals>
+              <goal>exec</goal>
+            </goals>
+            <configuration>
+              <arguments>
+                <argument>${project.basedir}/src/main/scripts/compare-docker-manifests.sh</argument>
+                <argument>${project.basedir}/src/main/resources/docker-manifest.csv</argument>
+                <argument>${project.basedir}/src/main/resources/docker-manifest-staging.csv</argument>
+              </arguments>
+            </configuration>
+          </execution>
+          <execution>
             <id>check-java-artifacts-released</id>
             <phase>verify</phase>
             <goals>
diff --git a/version-manifest/src/main/scripts/compare-docker-manifests.sh b/version-manifest/src/main/scripts/compare-docker-manifests.sh
new file mode 100755
index 0000000..86f8221
--- /dev/null
+++ b/version-manifest/src/main/scripts/compare-docker-manifests.sh
@@ -0,0 +1,25 @@
+#!/bin/bash
+
+if [ "$#" -ne 2 ]; then
+    echo This script compares docker-manifest.csv with docker-manifest-staging.csv to verify that staging has later versions than release.
+    echo "$0 <docker-manifest.csv> <docker-manifest-staging.csv>"
+    exit 1
+fi
+
+if [ -z "$WORKSPACE" ]; then
+    export WORKSPACE=`git rev-parse --show-toplevel`
+fi
+
+export LC_ALL=C
+
+err=0
+for line in $(join -t, $1 $2 | tail -n +2); do
+    image=$(echo $line | cut -d , -f 1)
+    release=$(echo $line | cut -d , -f 2)
+    staging=$(echo $line | cut -d , -f 3)
+
+    if [[ "${staging}_" < "${release}_" ]]; then
+        echo "[WARNING] $image:$staging is older than $release."
+    fi
+done
+exit $err