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..d9bf62a1ea7e1ce32d091b07d091a54057cff55f
--- /dev/null
+++ b/third_party/WebKit/Tools/Scripts/webkitpy/w3c/chromium_wpt.py
@@ -0,0 +1,67 @@
+# 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.
+
+CR_WPT_DIR = 'third_party/WebKit/LayoutTests/imported/wpt/'
+
+from webkitpy.common.memoized import memoized
+from webkitpy.common.webkit_finder import WebKitFinder
+
+
+class ChromiumWPT(object):
+    """This is a utility class for interacting with the Chromium git tree
+    for use cases relating to the Web Platform Tests.
+    """
+
+    def __init__(self, host):
+        self.host = host
+
+    def exportable_commits_since(self, sha):
+        cr_commits = self.cr_commits_since(sha)
+        return filter(self.has_changes_in_wpt, cr_commits)
+
+    def has_changes_in_wpt(self, sha):
+        """Returns if a Chromium sha has changed files in
+        LayoutTests/imported/wpt unless they're expectations
+        """
+        assert sha
+
+        files = self.host.executive.run_command([
+            'git', 'diff-tree', '--no-commit-id',
+            '--name-only', '-r', sha
+        ]).splitlines()
+
+        return any([f.startswith(CR_WPT_DIR) and '-expected' not in f for f in files])
+
+    def cr_commits_since(self, sha):
+        return self.host.executive.run_command([
+            'git', 'rev-list', '--reverse', '{}..HEAD'.format(sha)
+        ]).splitlines()
+
+    def subject(self, sha):
+        return self.host.executive.run_command([
+            'git', 'show', '--format=%s', '--no-patch', sha
+        ])
+
+    def commit_position(self, sha):
+        return self.host.executive.run_command([
+            'git', 'footers', '--position', sha
+        ])
+
+    def message(self, sha):
+        """This returns both the subject and body of a given revision."""
+        return self.host.executive.run_command([
+            'git', 'show', '--format=%B', '--no-patch', sha
+        ])
+
+    def format_patch(self, sha):
+        """Get patch but only for files in LayoutTests/imported/wpt"""
+        return self.host.executive.run_command([
+            'git', 'format-patch', '-1', '--stdout',
+            sha, 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')