Use platform-dependent metadata files to allow multiple builds from the same repository

build.py

Index: build.py
===================================================================
--- a/build.py
+++ b/build.py
@@ -13,16 +13,18 @@
 # GNU General Public License for more details.
 #
 # You should have received a copy of the GNU General Public License
 # along with Adblock Plus.  If not, see <http://www.gnu.org/licenses/>.
 
 import os, sys, re, subprocess, buildtools
 from getopt import getopt, GetoptError
 
+knownTypes = ('gecko', 'chrome')
+
 class Command(object):
   name = property(lambda self: self._name)
   shortDescription = property(lambda self: self._shortDescription,
       lambda self, value: self.__dict__.update({'_shortDescription': value}))
   description = property(lambda self: self._description,
       lambda self, value: self.__dict__.update({'_description': value}))
   params = property(lambda self: self._params,
       lambda self, value: self.__dict__.update({'_params': value}))
@@ -350,17 +352,17 @@ def generateDocs(baseDir, scriptName, op
   if len(args) == 0:
     print 'No target directory specified for the documentation'
     usage(scriptName, type, 'docs')
     return
   targetDir = args[0]
 
   toolkit = None
   for option, value in opts:
-    if option in ('-t', '--toolkit'):
+    if option in ('-k', '--toolkit'):
       toolkit = value
 
   if toolkit == None:
     toolkit = os.path.join(baseDir, 'jsdoc-toolkit')
     if not os.path.exists(toolkit):
       subprocess.Popen(['hg', 'clone', 'https://hg.adblockplus.org/jsdoc-toolkit/', toolkit]).communicate()
 
   command = [sys.executable,
@@ -471,17 +473,17 @@ with addCommand(showDescriptions, 'showd
   command.description = 'Display description strings for all locales as specified in the corresponding meta.properties files.'
   command.addOption('Only include the given locales', short='l', long='locales', value='l1,l2,l3')
   command.params = '[options]'
   command.supportedTypes = ('gecko')
 
 with addCommand(generateDocs, 'docs') as command:
   command.shortDescription = 'Generate documentation'
   command.description = 'Generate documentation files and write them into the specified directory.'
-  command.addOption('JsDoc Toolkit location', short='t', long='toolkit', value='dir')
+  command.addOption('JsDoc Toolkit location', short='k', long='toolkit', value='dir')
   command.params = '[options] <directory>'
   command.supportedTypes = ('gecko')
 
 with addCommand(runReleaseAutomation, 'release') as command:
   command.shortDescription = 'Run release automation'
   command.description = 'Note: If you are not the project owner then you '\
     'probably don\'t want to run this!\n\n'\
     'Runs release automation: creates downloads for the new version, tags '\
@@ -497,21 +499,61 @@ with addCommand(syncLocales, 'synclocale
   command.params = '<firefox_addon_directory>'
   command.supportedTypes = ('chrome')
 
 with addCommand(updatePSL, 'updatepsl') as command:
   command.shortDescription = 'Updates Public Suffix List'
   command.description = 'Downloads Public Suffix List (see http://publicsuffix.org/) and generates lib/publicSuffixList.js from it.'
   command.supportedTypes = ('chrome')
 
-def processArgs(baseDir, args, type='gecko'):
+def getType(baseDir, args):
+  # Look for an explicit type parameter
+  for i in range(len(args)):
+    if args[i] == '-t' and i < len(args) - 1:
+      type = args[i + 1]
+      del args[i + 1]
+      del args[i]
+      if type not in knownTypes:
+        print '''
+Unknown type %s specified, supported types are: %s
+''' % (type, knownTypes)
+        return None
+      else:
+        return type
+
+  # Try to guess repository type
+  types = []
+  for t in knownTypes:
+    if os.path.exists(os.path.join(baseDir, 'metadata.%s' % t)):
+      types.append(t)
+
+  if len(types) == 1:
+    return types[0]
+  elif len(types) > 1:
+    print '''
+Ambiguous repository type, please specify -t parameter explicitly, e.g.
+-t %s
+''' % types[0]
+    return None
+  else:
+    print '''
+No metadata file found in this repository, a metadata file like
+metadata.%s is required.
+''' % knownTypes[0]
+    return None
+
+def processArgs(baseDir, args):
   global commands
 
   scriptName = os.path.basename(args[0])
   args = args[1:]
+  type = getType(baseDir, args)
+  if type == None:
+    return
+
   if len(args) == 0:
     args = ['build']
     print '''
 No command given, assuming "build". For a list of commands run:
 
   %s help
 ''' % scriptName