Add a simple dmg script to the mac build dir to build a dmg out of the app....

chrome/chrome.gyp

Index: chrome/chrome.gyp
===================================================================
--- chrome/chrome.gyp	(revision 15636)
+++ chrome/chrome.gyp	(working copy)
@@ -2766,6 +2766,9 @@
     ['OS=="mac"',
       # On Mac only, add a project target called "package_app" that only
       # runs a shell script (package_chrome.sh).
+      # On Mac only, add a project target called "build_app_dmg" that only
+      # builds a DMG out of the App (eventually will completely replace
+      # "package_app").
       { 'targets': [
         {
           'target_name': 'package_app',
@@ -2787,6 +2790,32 @@
             },
           ],  # 'actions'
         },
+        {
+          'target_name': 'build_app_dmg',
+          # do NOT place this in the 'all' list; most won't want it.
+          # In gyp, booleans are 0/1 not True/False.
+          'suppress_wildcard': 1,
+          'type': 'none',
+          'dependencies': [
+            'app',
+          ],
+          'variables': {
+            'build_app_dmg_script': '<(DEPTH)/build/mac/build_app_dmg',

[Mark Mentovai, 2009/05/08 20:18:22]

The varname should end with _file or _path for proper rehoming.

+          },
+          'actions': [
+            {
+              'inputs': [
+                '<(build_app_dmg_script)',
+                '<(PRODUCT_DIR)/<(branding).app',
+              ],
+              'outputs': [
+                '<(PRODUCT_DIR)/<(branding).dmg',
+              ],
+              'action_name': 'build_app_dmg',
+              'action': ['<(build_app_dmg_script)', '<@(branding)'],
+            },
+          ],  # 'actions'
+        },
       ]
     }, { # else: OS != "mac"
       'targets': [