CLI: Add --version to CLI option

app/src/processing/app/Base.java

@@ -483,6 +483,9 @@ public Base(String[] args) throws Exception {
       System.exit(0);
     } else if (parser.isGetPrefMode()) {
       BaseNoGui.dumpPrefs(parser);
+    } else if (parser.isVersionMode()) {
+      System.out.print("Arduino: " + BaseNoGui.VERSION_NAME_LONG);
+      System.exit(0);
     }
   }
 

app/test/processing/app/CommandLineTest.java

@@ -34,6 +34,7 @@
 import java.io.File;
 
 import org.apache.commons.compress.utils.IOUtils;
+import org.fest.assertions.Assertions;
 import org.junit.Before;
 import org.junit.Test;
 
@@ -126,5 +127,36 @@ public void testCommandLinePreferencesSave() throws Exception {
 
     prefs = new PreferencesMap(prefFile);
     assertEquals("preference should be saved", "xxx", prefs.get("test_pref"));
-}
+  }
+
+  @Test
+  public void testCommandLineVersion() throws Exception {
+    Runtime rt = Runtime.getRuntime();
+    Process pr = rt.exec(new String[]{
+      arduinoPath.getAbsolutePath(),
+      "--version",
+    });
+    pr.waitFor();
+
+    Assertions.assertThat(pr.exitValue())
+      .as("Process will finish with exit code 0 in --version")
+      .isEqualTo(0);
+    Assertions.assertThat(new String(IOUtils.toByteArray(pr.getInputStream())))
+      .matches("Arduino: \\d+\\.\\d+\\.\\d+.*");
+  }
+
+  @Test
+  public void testCommandLineMultipleAction() throws Exception {
+    Runtime rt = Runtime.getRuntime();
+    Process pr = rt.exec(new String[]{
+      arduinoPath.getAbsolutePath(),
+      "--version",
+      "--verify",
+    });
+    pr.waitFor();
+
+    Assertions.assertThat(pr.exitValue())
+      .as("Multiple Action will be rejected")
+      .isEqualTo(3);
+  }
 }

arduino-core/src/processing/app/helpers/CommandlineParser.java

@@ -16,7 +16,7 @@
 public class CommandlineParser {
 
   private enum ACTION {
-    GUI, NOOP, VERIFY("--verify"), UPLOAD("--upload"), GET_PREF("--get-pref"), INSTALL_BOARD("--install-boards"), INSTALL_LIBRARY("--install-library");
+    GUI, NOOP, VERIFY("--verify"), UPLOAD("--upload"), GET_PREF("--get-pref"), INSTALL_BOARD("--install-boards"), INSTALL_LIBRARY("--install-library"), VERSION("--version");
 
     final String value;
 
@@ -52,6 +52,7 @@ public CommandlineParser(String[] args) {
     actions.put("--get-pref", ACTION.GET_PREF);
     actions.put("--install-boards", ACTION.INSTALL_BOARD);
     actions.put("--install-library", ACTION.INSTALL_LIBRARY);
+    actions.put("--version", ACTION.VERSION);
   }
 
   public void parseArgumentsPhase1() {
@@ -340,6 +341,10 @@ public boolean isInstallLibrary() {
     return action == ACTION.INSTALL_LIBRARY;
   }
 
+  public boolean isVersionMode() {
+    return action == ACTION.VERSION;
+  }
+
   public String getBoardToInstall() {
     return this.boardToInstall;
   }

build/shared/manpage.adoc

@@ -33,6 +33,8 @@ SYNOPSIS
 
 *arduino* [*--install-library* __library name__[:__version__][,__library name__[:__version__],__library name__[:__version__]]
 
+*arduino* [*--version*]
+
 DESCRIPTION
 -----------
 The 'arduino' integrated development environment allows editing,
@@ -83,6 +85,9 @@ ACTIONS
 	Fetches available libraries list and install the specified one. If __version__ is omitted, the latest is installed. If a library with the same version is already installed, nothing is installed and program exits with exit code 1. If a library with a different version is already installed, it's replaced.
 	Multiple libraries can be specified, separated by a comma.
 
+*--version*::
+	Print the version information and exit.
+
 OPTIONS
 -------
 *--board* __package__:__arch__:__board__[:__parameters__]::