rebaseline.py: split image-based rebaselining, which will go away soon, into its own script

tools/rebaseline.py

 #!/usr/bin/python
 
 '''
 Copyright 2012 Google Inc.
 
 Use of this source code is governed by a BSD-style license that can be
 found in the LICENSE file.
 '''
 
 '''
@@ skipping 59 matching lines @@
 
 class CommandFailedException(Exception):
     pass
 
 class Rebaseliner(object):
 
     # params:
     #  json_base_url: base URL from which to read json_filename
     #  json_filename: filename (under json_base_url) from which to read a
     #                 summary of results; typically "actual-results.json"
-    #  subdirs: which platform subdirectories to rebaseline; if not specified,
-    #           rebaseline all platform subdirectories
     #  tests: list of tests to rebaseline, or None if we should rebaseline
     #         whatever files the JSON results summary file tells us to
     #  configs: which configs to run for each test; this should only be
     #           specified if the list of tests was also specified (otherwise,
     #           the JSON file will give us test names and configs)
     #  dry_run: if True, instead of actually downloading files or adding
     #           files to checkout, display a list of operations that
     #           we would normally perform
     #  add_new: if True, add expectations for tests which don't have any yet
+    #  missing_json_is_fatal: whether to halt execution if we cannot read a
+    #                         JSON actual result summary file
     def __init__(self, json_base_url, json_filename,
-                 subdirs=None, tests=None, configs=None, dry_run=False,
-                 add_new=False):
+                 tests=None, configs=None, dry_run=False,
+                 add_new=False, missing_json_is_fatal=False):
         if configs and not tests:
             raise ValueError('configs should only be specified if tests ' +
                              'were specified also')
         self._tests = tests
         self._configs = configs
-        if not subdirs:
-            self._subdirs = sorted(SUBDIR_MAPPING.keys())
-            self._missing_json_is_fatal = False
-        else:
-            self._subdirs = subdirs
-            self._missing_json_is_fatal = True
         self._json_base_url = json_base_url
         self._json_filename = json_filename
         self._dry_run = dry_run
         self._add_new = add_new
+        self._missing_json_is_fatal = missing_json_is_fatal
         self._googlestorage_gm_actuals_root = (
             'http://chromium-skia-gm.commondatastorage.googleapis.com/gm')
         self._testname_pattern = re.compile('(\S+)_(\S+).png')
         self._is_svn_checkout = (
             os.path.exists('.svn') or
             os.path.exists(os.path.join(os.pardir, '.svn')))
         self._is_git_checkout = (
             os.path.exists('.git') or
             os.path.exists(os.path.join(os.pardir, '.git')))
 
@@ skipping 213 matching lines @@
         print '# ' + expectations_subdir + ':'
         for config in configs:
             infilename = test + '_' + config + '.png'
             outfilename = os.path.join(expectations_subdir, infilename);
             self._RebaselineOneFile(expectations_subdir=expectations_subdir,
                                     builder_name=builder_name,
                                     infilename=infilename,
                                     outfilename=outfilename,
                                     all_results=all_results)
 
-    # Rebaseline all platforms/tests/types we specified in the constructor.
-    def RebaselineAll(self):
-        for subdir in self._subdirs:
-            if not subdir in SUBDIR_MAPPING.keys():
-                raise Exception(('unrecognized platform subdir "%s"; ' +
-                                 'should be one of %s') % (
-                                     subdir, SUBDIR_MAPPING.keys()))
-            builder_name = SUBDIR_MAPPING[subdir]
-            json_url = '/'.join([self._json_base_url,
-                                 subdir, builder_name, subdir,
-                                 self._json_filename])
-            all_results = self._GetActualResults(json_url=json_url)
+    # Rebaseline all tests/types we specified in the constructor.
+    #
+    # params:
+    #  subdir : must be one of SUBDIR_MAPPING.keys()
+    def RebaselineSubdir(self, subdir):
+        if not subdir in SUBDIR_MAPPING.keys():
+            raise Exception(('unrecognized platform subdir "%s"; ' +
+                             'should be one of %s') % (
+                                 subdir, SUBDIR_MAPPING.keys()))
+        builder_name = SUBDIR_MAPPING[subdir]
+        json_url = '/'.join([self._json_base_url,
+                             subdir, builder_name, subdir,
+                             self._json_filename])
+        all_results = self._GetActualResults(json_url=json_url)
 
-            if self._tests:
-                for test in self._tests:
-                    self._RebaselineOneTest(expectations_subdir=subdir,
-                                            builder_name=builder_name,
-                                            test=test, all_results=all_results)
-            else:  # get the raw list of files that need rebaselining from JSON
-                filenames = self._GetFilesToRebaseline(json_url=json_url,
-                                                       add_new=self._add_new)
-                for filename in filenames:
-                    outfilename = os.path.join(subdir, filename);
-                    self._RebaselineOneFile(expectations_subdir=subdir,
-                                            builder_name=builder_name,
-                                            infilename=filename,
-                                            outfilename=outfilename,
-                                            all_results=all_results)
+        if self._tests:
+            for test in self._tests:
+                self._RebaselineOneTest(expectations_subdir=subdir,
+                                        builder_name=builder_name,
+                                        test=test, all_results=all_results)
+        else:  # get the raw list of files that need rebaselining from JSON
+            filenames = self._GetFilesToRebaseline(json_url=json_url,
+                                                   add_new=self._add_new)
+            for filename in filenames:
+                outfilename = os.path.join(subdir, filename);
+                self._RebaselineOneFile(expectations_subdir=subdir,
+                                        builder_name=builder_name,
+                                        infilename=filename,
+                                        outfilename=outfilename,
+                                        all_results=all_results)
 
 # main...
 
 parser = argparse.ArgumentParser()
 parser.add_argument('--add-new', action='store_true',
                     help='in addition to the standard behavior of ' +
                     'updating expectations for failing tests, add ' +
                     'expectations for tests which don\'t have expectations ' +
                     'yet.')
 parser.add_argument('--configs', metavar='CONFIG', nargs='+',
@@ skipping 16 matching lines @@
 parser.add_argument('--subdirs', metavar='SUBDIR', nargs='+',
                     help='which platform subdirectories to rebaseline; ' +
                     'if unspecified, rebaseline all subdirs, same as ' +
                     '"--subdirs %s"' % ' '.join(sorted(SUBDIR_MAPPING.keys())))
 parser.add_argument('--tests', metavar='TEST', nargs='+',
                     help='which tests to rebaseline, e.g. ' +
                     '"--tests aaclip bigmatrix"; if unspecified, then all ' +
                     'failing tests (according to the actual-results.json ' +
                     'file) will be rebaselined.')
 args = parser.parse_args()
-rebaseliner = Rebaseliner(tests=args.tests, configs=args.configs,
-                          subdirs=args.subdirs, dry_run=args.dry_run,
-                          json_base_url=args.json_base_url,
-                          json_filename=args.json_filename,
-                          add_new=args.add_new)
-rebaseliner.RebaselineAll()
+if args.subdirs:
+    subdirs = args.subdirs
+    missing_json_is_fatal = True
+else:
+    subdirs = sorted(SUBDIR_MAPPING.keys())
+    missing_json_is_fatal = False
+for subdir in subdirs:
+    # Soon, we will be instantiating different Rebaseliner objects depending
+    # on whether we are rebaselining an expected-results.json file, or
+    # individual image files.  Different gm-expected subdirectories may move
+    # from individual image files to JSON-format expectations at different
+    # times, so we need to make this determination per subdirectory.
+    #
+    # See https://goto.google.com/ChecksumTransitionDetail
+    rebaseliner = Rebaseliner(tests=args.tests, configs=args.configs,

[epoger, 2013/06/18 17:27:40]

Patchset 1 moves the subdir loop outside of the Rebaseliner object, for the
reason detailed in the new comment:

# Soon, we will be instantiating different Rebaseliner objects depending
# on whether we are rebaselining an expected-results.json file, or
# individual image files.  Different gm-expected subdirectories may move
# from individual image files to JSON-format expectations at different
# times, so we need to make this determination per subdirectory.

+                              dry_run=args.dry_run,
+                              json_base_url=args.json_base_url,
+                              json_filename=args.json_filename,
+                              add_new=args.add_new,
+                              missing_json_is_fatal=missing_json_is_fatal)
+    rebaseliner.RebaselineSubdir(subdir=subdir)