Script for exporting WPT

third_party/WebKit/Tools/Scripts/webkitpy/w3c/chromium_wpt.py

Index: third_party/WebKit/Tools/Scripts/webkitpy/w3c/chromium_wpt.py
diff --git a/third_party/WebKit/Tools/Scripts/webkitpy/w3c/chromium_wpt.py b/third_party/WebKit/Tools/Scripts/webkitpy/w3c/chromium_wpt.py
new file mode 100644
index 0000000000000000000000000000000000000000..c1c091ab719473b4cbb557fc2e659dd8cee3d02d
--- /dev/null
+++ b/third_party/WebKit/Tools/Scripts/webkitpy/w3c/chromium_wpt.py
@@ -0,0 +1,79 @@
+# Copyright 2016 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+"""A utility class for interacting with the Chromium git tree
+for use cases relating to the Web Platform Tests.
+"""
+
+CHROMIUM_WPT_DIR = 'third_party/WebKit/LayoutTests/imported/wpt/'
+
+from webkitpy.common.memoized import memoized
+from webkitpy.common.webkit_finder import WebKitFinder
+
+
+class ChromiumWPT(object):
+
+    def __init__(self, host):
+        """
+        Args:
+            host: A Host object.
+        """
+        self.host = host
+
+    def exportable_commits_since(self, chromium_commit):
+        chromium_commits = self.chromium_commits_since(chromium_commit)
+
+        def is_exportable(chromium_commit):
+            return self.has_changes_in_wpt(chromium_commit) and not self.is_import_commit(chromium_commit)
+
+        return filter(is_exportable, chromium_commits)
+
+    def is_import_commit(self, chromium_commit):
+        return self.subject(chromium_commit).startswith('Import wpt@')
+
+    def has_changes_in_wpt(self, chromium_commit):
+        """Detects if a Chromium revision has modified files in the WPT directory."""
+
+        assert chromium_commit
+        files = self.host.executive.run_command([
+            'git', 'diff-tree', '--no-commit-id',
+            '--name-only', '-r', chromium_commit
+        ]).splitlines()
+
+        # TODO(jeffcarp): Use DepsUpdater.is_baseline
+        return any(f.startswith(CHROMIUM_WPT_DIR) and '-expected' not in f for f in files)
+
+    def chromium_commits_since(self, chromium_commit):
+        return self.host.executive.run_command([
+            'git', 'rev-list', '--reverse', '{}..HEAD'.format(chromium_commit)
+        ]).splitlines()
+
+    def subject(self, chromium_commit):
+        return self.host.executive.run_command([
+            'git', 'show', '--format=%s', '--no-patch', chromium_commit
+        ])
+
+    def commit_position(self, chromium_commit):
+        return self.host.executive.run_command([
+            'git', 'footers', '--position', chromium_commit
+        ])
+
+    def message(self, chromium_commit):
+        """Returns a string with a commit's subject and body."""
+        return self.host.executive.run_command([
+            'git', 'show', '--format=%B', '--no-patch', chromium_commit
+        ])
+
+    def format_patch(self, chromium_commit):
+        """Makes a patch with just changes in files in the WPT for a given commit."""
+        # TODO(jeffcarp): do not include expectations files
+        return self.host.executive.run_command([
+            'git', 'format-patch', '-1', '--stdout',
+            chromium_commit, self.absolute_chromium_wpt_dir()
+        ])
+
+    @memoized
+    def absolute_chromium_wpt_dir(self):
+        finder = WebKitFinder(self.host.filesystem)
+        return finder.path_from_webkit_base('LayoutTests', 'imported', 'wpt')