feat: allow dynamic version info

Author: simschla

cli/build.gradle

@@ -38,8 +38,11 @@ dependencies {
 }
 
 compileJava {
+	// options for picocli codegen
+	// https://github.com/remkop/picocli/tree/main/picocli-codegen#222-other-options
 	options.compilerArgs += [
-		"-Aproject=${project.group}/${project.name}"
+		"-Aproject=${project.group}/${project.name}",
+		"-Aother.resource.bundles=application"
 	]
 }
 
@@ -50,6 +53,29 @@ tasks.withType(org.graalvm.buildtools.gradle.tasks.BuildNativeImageTask).configu
 	notCompatibleWithConfigurationCache('https://github.com/britter/maven-plugin-development/issues/8')
 }
 
+tasks.withType(ProcessResources).configureEach(new ApplicationPropertiesProcessResourcesAction(project.version))
+
+class ApplicationPropertiesProcessResourcesAction implements Action<ProcessResources> {
+
+	private final String cliVersion
+
+	ApplicationPropertiesProcessResourcesAction(String cliVersion) {
+		this.cliVersion = cliVersion
+	}
+
+	@Override
+	void execute(ProcessResources processResources) {
+		processResources.filesMatching("application.properties") {
+			filter(
+					org.apache.tools.ant.filters.ReplaceTokens,
+					tokens: [
+						'cli.version': cliVersion
+					]
+					)
+		}
+	}
+}
+
 application {
 	mainClass = 'com.diffplug.spotless.cli.SpotlessCLI'
 	applicationName = 'spotless'
@@ -63,8 +89,6 @@ graalvmNative {
 			imageName = 'spotless'
 			mainClass = 'com.diffplug.spotless.cli.SpotlessCLI'
 			sharedLibrary = false
-
-			runtimeArgs.add('--user=ABC')
 		}
 	}
 }

cli/src/main/java/com/diffplug/spotless/cli/version/SpotlessCLIVersionProvider.java

@@ -15,12 +15,18 @@
  */
 package com.diffplug.spotless.cli.version;
 
+import java.util.Properties;
+
 import picocli.CommandLine;
 
 public class SpotlessCLIVersionProvider implements CommandLine.IVersionProvider {
 
 	@Override
 	public String[] getVersion() throws Exception {
-		return new String[]{"Spotless CLI 1.0.0", "TODO"};
+		// load application.properties
+		Properties properties = new Properties();
+		properties.load(getClass().getResourceAsStream("/application.properties"));
+		String version = properties.getProperty("cli.version");
+		return new String[]{"Spotless CLI version " + version};
 	}
 }

cli/src/main/resources/application.properties

@@ -0,0 +1 @@
+cli.version=@cli.version@