Add profiling option, update CLI displayed version.

cli/src/main/groovy/com/jessebrault/ssg/AbstractBuildCommand.groovy

@@ -68,6 +68,12 @@ abstract class AbstractBuildCommand extends AbstractSubCommand {
     )
     boolean dryRun
 
+    @CommandLine.Option(
+            names = ['--profile'],
+            description = 'Log elapsed times for build steps.'
+    )
+    boolean profile
+
     protected StaticSiteGenerator staticSiteGenerator = null
 
     protected final Integer doSingleBuild(String buildName) {
@@ -77,6 +83,7 @@ abstract class AbstractBuildCommand extends AbstractSubCommand {
             def groovyClassLoader = new GroovyClassLoader(this.class.classLoader)
 
             if (this.gradle) {
+                def gradleStartTime = System.currentTimeMillis()
                 def projectConnection = GradleConnector.newConnector()
                         .forProjectDirectory(
                                 this.commonCliOptions.projectDir.toPath().resolve(this.gradleProjectDir).toFile()
@@ -97,6 +104,11 @@ abstract class AbstractBuildCommand extends AbstractSubCommand {
 
                 projectConnection.newBuild().forTasks('ssgJars').run()
                 projectConnection.close()
+
+                if (this.profile) {
+                    def gradleElapsedTime = System.currentTimeMillis() - gradleStartTime
+                    logger.info("Gradle connection elapsed time: ${gradleElapsedTime / 1000} seconds")
+                }
             }
 
             this.libDirs.each { libDir ->
@@ -123,6 +135,8 @@ abstract class AbstractBuildCommand extends AbstractSubCommand {
             )
         }
 
+        def buildStartTime = System.currentTimeMillis()
+
         final Collection<Diagnostic> diagnostics = this.staticSiteGenerator.doBuild(
                 this.commonCliOptions.projectDir,
                 buildName,
@@ -130,6 +144,11 @@ abstract class AbstractBuildCommand extends AbstractSubCommand {
                 this.scriptArgs ?: [:]
         )
 
+        def buildElapsedTime = System.currentTimeMillis() - buildStartTime
+        if (this.profile) {
+            logger.info("Build $buildName elapsed time: ${buildElapsedTime / 1000} seconds")
+        }
+
         if (!diagnostics.isEmpty()) {
             diagnostics.each {
                 logger.error(it.message)

cli/src/main/groovy/com/jessebrault/ssg/StaticSiteGeneratorCli.groovy

@@ -5,7 +5,7 @@ import picocli.CommandLine
 @CommandLine.Command(
         name = 'ssg',
         mixinStandardHelpOptions = true,
-        version = '0.4.0',
+        version = '0.6.0-SNAPSHOT',
         description = 'A static site generator which can interface with Gradle for high extensibility.',
         subcommands = [SsgInit, SsgBuild, SsgWatch]
 )