print tool version to stdout and log for create/update/rebase (#263)

Author: ddsharpe

imagetool/src/main/java/com/oracle/weblogic/imagetool/cli/HelpVersionProvider.java

@@ -3,26 +3,42 @@
 
 package com.oracle.weblogic.imagetool.cli;
 
+import java.io.IOException;
 import java.io.InputStream;
-import java.util.ArrayList;
-import java.util.List;
 import java.util.Properties;
 
 import picocli.CommandLine.IVersionProvider;
 
 public class HelpVersionProvider implements IVersionProvider {
 
-    @Override
-    public String[] getVersion() throws Exception {
-        List<String> retList = new ArrayList<>();
-        try (InputStream versionInfoStream = this.getClass().getResourceAsStream("/version-info.properties")) {
-            if (versionInfoStream != null) {
-                Properties versionProps = new Properties();
-                versionProps.load(versionInfoStream);
-                retList.add(String.format("%s:%s", versionProps.getProperty("project_name", "imagetool"),
-                        versionProps.getProperty("project_version", "0.0")));
+    private static final Properties projectProps = new Properties();
+
+    /**
+     * Get the project name and version declared in the POM.
+     * @return project name and version number
+     * @throws IOException if loading version properties fails.
+     */
+    public static Properties projectProperties() throws IOException {
+        if (projectProps.isEmpty()) {
+            try (InputStream versionInfoStream =
+                     HelpVersionProvider.class.getResourceAsStream("/version-info.properties")) {
+                if (versionInfoStream != null) {
+                    projectProps.load(versionInfoStream);
+                }
             }
         }
-        return retList.toArray(new String[0]);
+        return projectProps;
+    }
+
+    public static String versionString() throws IOException {
+        return "WebLogic Image Tool version " + projectProperties().getProperty("project_version");
+    }
+
+    @Override
+    public String[] getVersion() throws Exception {
+        Properties p = projectProperties();
+        String[] result = new String[1];
+        result[0] = p.getProperty("project_name") + ":" + p.getProperty("project_version");
+        return result;
     }
 }

imagetool/src/main/java/com/oracle/weblogic/imagetool/cli/menu/CommonOptions.java

@@ -26,6 +26,7 @@
 import com.oracle.weblogic.imagetool.cachestore.MultiplePatchVersionsException;
 import com.oracle.weblogic.imagetool.cachestore.OPatchFile;
 import com.oracle.weblogic.imagetool.cachestore.PatchFile;
+import com.oracle.weblogic.imagetool.cli.HelpVersionProvider;
 import com.oracle.weblogic.imagetool.installer.FmwInstallerType;
 import com.oracle.weblogic.imagetool.logging.LoggingFacade;
 import com.oracle.weblogic.imagetool.logging.LoggingFactory;
@@ -160,6 +161,7 @@ void setTempDirectory(String value) {
 
     void init(String buildId) throws Exception {
         logger.entering(buildId);
+        logger.info(HelpVersionProvider.versionString());
         dockerfileOptions = new DockerfileOptions(buildId);
         logger.info("IMG-0016", buildId);