chore: app version is now set by build

Author: quintesse

pom.xml

@@ -198,6 +198,7 @@
                     <archive>
                         <manifest>
                             <mainClass>${mainClass}</mainClass>
+                            <addDefaultImplementationEntries>true</addDefaultImplementationEntries>
                         </manifest>
                     </archive>
                 </configuration>

src/main/java/org/codejive/jpm/Main.java

@@ -14,6 +14,7 @@
 import java.util.concurrent.Callable;
 import java.util.stream.Collectors;
 import org.codejive.jpm.util.SyncStats;
+import org.codejive.jpm.util.Version;
 import picocli.CommandLine;
 import picocli.CommandLine.Command;
 import picocli.CommandLine.Mixin;
@@ -23,7 +24,7 @@
 @Command(
         name = "jpm",
         mixinStandardHelpOptions = true,
-        version = "jpm 0.1",
+        versionProvider = Version.class,
         description = "Simple command line tool for managing Maven artifacts",
         subcommands = {Main.Copy.class, Main.Sync.class, Main.Install.class, Main.PrintPath.class})
 public class Main {

src/main/java/org/codejive/jpm/util/Version.java

@@ -0,0 +1,15 @@
+package org.codejive.jpm.util;
+
+import picocli.CommandLine;
+
+public class Version implements CommandLine.IVersionProvider {
+    public static String get() {
+        String version = Version.class.getPackage().getImplementationVersion();
+        return version != null ? version : "0.0.0";
+    }
+
+    @Override
+    public String[] getVersion() throws Exception {
+        return new String[] {Version.get()};
+    }
+}