Rewrite build_app_engine_package using python

Gruntfile.js

@@ -58,15 +58,8 @@ module.exports = function(grunt) {
       runPythonTests: {
         command: './build/run_python_tests.sh'
       },
-      buildVersion: {
-        command: './build/build_version_file.sh',
-        options: {
-          stdout: true,
-          stderr: true
-        }
-      },
       buildAppEnginePackage: {
-        command: './build/build_app_engine_package.sh',
+        command: 'python ./build/build_app_engine_package.py src out/app_engine',
         options: {
           stdout: true,
           stderr: true
@@ -170,10 +163,10 @@ module.exports = function(grunt) {
 
   // set default tasks to run when grunt is called without parameters
   grunt.registerTask('default', ['csslint', 'htmlhint', 'jscs', 'jshint',
-                                 'shell:buildVersion', 'runPythonTests', 'jstests']);
+                                 'runPythonTests', 'jstests']);
   grunt.registerTask('runPythonTests', ['shell:buildAppEnginePackage', 'shell:runPythonTests']);
   grunt.registerTask('jstests', ['closurecompiler:debug', 'jstdPhantom']);
-  grunt.registerTask('build', ['closurecompiler:debug', 'shell:buildVersion', 'shell:buildAppEnginePackage', 'grunt-chrome-build']);
+  grunt.registerTask('build', ['closurecompiler:debug', 'shell:buildAppEnginePackage', 'grunt-chrome-build']);
   // also possible to call JavaScript directly in registerTask()
   // or to call external tasks with grunt.loadTasks()
 };

build/build_app_engine_package.py

@@ -0,0 +1,62 @@
+#!/usr/bin/python
+
+import os
+import optparse
+import shutil
+import sys
+
+USAGE = """%prog SRC_PATH DEST_PATH
+Build the GAE source code package.
+
+SRC_PATH     Path to the source code root directory.
+DEST_PATH    Path to the root directory to push/deploy GAE from."""
+
+
+def main(src_path, dest_path):
+    if os.path.exists(dest_path):
+        shutil.rmtree(dest_path)
+    os.makedirs(dest_path)
+
+    simply_copy_subdirs = ['bigquery', 'css', 'images', 'third_party']
+
+    for dirpath, dirnames, files in os.walk(src_path):
+        for subdir in simply_copy_subdirs:
+            if dirpath.endswith(subdir):
+                shutil.copytree(dirpath, os.path.join(dest_path, subdir))
+
+        if dirpath.endswith('html'):
+            dest_html_path = os.path.join(dest_path, 'html')
+            os.makedirs(dest_html_path)
+            for name in files:
+                # Template files must be in the root directory.
+                if name.endswith('_template.html'):
+                    shutil.copy(os.path.join(dirpath, name), dest_path)
+                else:
+                    shutil.copy(os.path.join(dirpath, name), dest_html_path)
+        elif dirpath.endswith('app_engine'):
+            for name in files:
+                if name.endswith('.py') and name.find('test') == -1 \
+                    or name.endswith('.yaml'):
+                    shutil.copy(os.path.join(dirpath, name), dest_path)
+        elif dirpath.endswith('js'):
+            for name in files:
+                # loopback.js is not compiled by Closure and needs to be copied
+                # separately.
+                if name == 'loopback.js':
+                    dest_js_path = os.path.join(dest_path, 'js')
+                    os.makedirs(dest_js_path)
+                    shutil.copy(os.path.join(dirpath, name), dest_js_path)
+                    break
+
+    os.system('build/build_version_file.sh')
+
+if __name__ == '__main__':
+    parser = optparse.OptionParser(USAGE)
+    options, args = parser.parse_args()
+    if len(args) != 2:
+        print 'Error: Exactly 2 arguments required.'
+        parser.print_help()
+        sys.exit(1)
+    SRC_PATH = args[0]
+    DEST_PATH = args[1]
+    main(SRC_PATH, DEST_PATH)