1 files changed, 81 insertions, 0 deletions
diff --git a/Tools/Scripts/webkitpy/common/checkout/scm/detection.py b/Tools/Scripts/webkitpy/common/checkout/scm/detection.py
new file mode 100644
index 000000000..ac12d7521
--- /dev/null
+++ b/Tools/Scripts/webkitpy/common/checkout/scm/detection.py
@@ -0,0 +1,81 @@
+# Copyright (c) 2009, 2010, 2011 Google Inc. All rights reserved.
+# Copyright (c) 2009 Apple Inc. All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+from webkitpy.common.system.filesystem import FileSystem
+from webkitpy.common.system.executive import Executive
+
+from webkitpy.common.system.deprecated_logging import log
+
+from .svn import SVN
+from .git import Git
+
+
+class SCMDetector(object):
+    def __init__(self, filesystem, executive):
+        self._filesystem = filesystem
+        self._executive = executive
+
+    def default_scm(self, patch_directories=None):
+        """Return the default SCM object as determined by the CWD and running code.
+
+        Returns the default SCM object for the current working directory; if the
+        CWD is not in a checkout, then we attempt to figure out if the SCM module
+        itself is part of a checkout, and return that one. If neither is part of
+        a checkout, None is returned.
+        """
+        cwd = self._filesystem.getcwd()
+        scm_system = self.detect_scm_system(cwd, patch_directories)
+        if not scm_system:
+            script_directory = self._filesystem.dirname(self._filesystem.path_to_module(self.__module__))
+            scm_system = self.detect_scm_system(script_directory, patch_directories)
+            if scm_system:
+                log("The current directory (%s) is not a WebKit checkout, using %s" % (cwd, scm_system.checkout_root))
+            else:
+                raise Exception("FATAL: Failed to determine the SCM system for either %s or %s" % (cwd, script_directory))
+        return scm_system
+
+    def detect_scm_system(self, path, patch_directories=None):
+        absolute_path = self._filesystem.abspath(path)
+
+        if patch_directories == []:
+            patch_directories = None
+
+        if SVN.in_working_directory(absolute_path):
+            return SVN(cwd=absolute_path, patch_directories=patch_directories, filesystem=self._filesystem, executive=self._executive)
+
+        if Git.in_working_directory(absolute_path):
+            return Git(cwd=absolute_path, filesystem=self._filesystem, executive=self._executive)
+
+        return None
+
+
+# FIXME: These free functions are all deprecated:
+
+def detect_scm_system(path, patch_directories=None):
+    return SCMDetector(FileSystem(), Executive()).detect_scm_system(path, patch_directories)