Added --preserve-temp-files command line option

app/src/processing/app/Base.java

@@ -404,6 +404,7 @@ public class Base {
         // Set verbosity for command line build
         Preferences.set("build.verbose", "" + parser.isDoVerboseBuild());
         Preferences.set("upload.verbose", "" + parser.isDoVerboseUpload());
+        Preferences.set("runtime.preserve.temp.files", Boolean.toString(parser.isPreserveTempFiles()));
 
         // Make sure these verbosity preferences are only for the
         // current session

arduino-core/src/cc/arduino/files/DeleteFilesOnShutdown.java

@@ -1,5 +1,6 @@
 package cc.arduino.files;
 
+import processing.app.PreferencesData;
 import processing.app.helpers.FileUtils;
 
 import java.io.File;
@@ -27,6 +28,10 @@ public class DeleteFilesOnShutdown implements Runnable {
 
   @Override
   public void run() {
+    boolean preserveTempFiles = PreferencesData.getBoolean("runtime.preserve.temp.files");
+    if (preserveTempFiles) {
+      return;
+    }
     List<File> copyOfFiles;
     synchronized (this) {
       copyOfFiles = new LinkedList<File>(files);

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

@@ -36,6 +36,7 @@ public class CommandlineParser {
   private boolean doVerboseBuild = false;
   private boolean doVerboseUpload = false;
   private boolean doUseProgrammer = false;
+  private boolean preserveTempFiles;
   private boolean noUploadPort = false;
   private boolean forceSavePrefs = false;
   private String getPref;
@@ -105,6 +106,12 @@ public class CommandlineParser {
           action = ACTION.NOOP;
         continue;
       }
+      if (args[i].equals("--preserve-temp-files")) {
+        preserveTempFiles = true;
+        if (action == ACTION.GUI)
+          action = ACTION.NOOP;
+        continue;
+      }
       if (args[i].equals("--verbose-build")) {
         doVerboseBuild = true;
         if (action == ACTION.GUI)
@@ -330,4 +337,8 @@ public class CommandlineParser {
   public String getLibraryToInstall() {
     return libraryToInstall;
   }
+
+  public boolean isPreserveTempFiles() {
+    return preserveTempFiles;
+  }
 }

build/shared/manpage.adoc

@@ -25,7 +25,7 @@ SYNOPSIS
 --------
 *arduino* ['FILE.ino'...]
 
-*arduino* [*--verify*|*--upload*] [*--board* __package__:__arch__:__board__[:__parameters__]] [*--port* __portname__] [*--pref* __name__=__value__] [*-v*|*--verbose*] [__FILE.ino__]
+*arduino* [*--verify*|*--upload*] [*--board* __package__:__arch__:__board__[:__parameters__]] [*--port* __portname__] [*--pref* __name__=__value__] [*-v*|*--verbose*] [--preserve-temp-files] [__FILE.ino__]
 
 *arduino* [*--get-pref* __preference__]
 
@@ -117,6 +117,10 @@ OPTIONS
 	verbose mode during build is *disabled* regardless of the current
 	preferences.
 
+*--preserve-temp-files*::
+	Keep temporary files (preprocessed sketch, object files...) after termination.
+	If omitted, temporary files are deleted.
+
 {empty}::
 	This option is only valid together with *--verify* or
 	*--upload*.