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Unified Diff: tools/drmemory/scripts/path_utils.py

Issue 1452293002: Add Dr. Memory tool (Closed) Base URL: https://pdfium.googlesource.com/pdfium.git@master
Patch Set: remove more unused code Created 5 years, 1 month ago
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Index: tools/drmemory/scripts/path_utils.py
diff --git a/tools/drmemory/scripts/path_utils.py b/tools/drmemory/scripts/path_utils.py
new file mode 100644
index 0000000000000000000000000000000000000000..6ab43120434256459f0c9bac2c764698a017ba09
--- /dev/null
+++ b/tools/drmemory/scripts/path_utils.py
@@ -0,0 +1,84 @@
+# Copyright (c) 2011 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.
+
+"""Some utility methods for getting and manipulating paths."""
+
+# TODO(pamg): Have the buildbot use these, too.
+
+
+import errno
+import os
+import sys
+
+class PathNotFound(Exception): pass
+
+def ScriptDir():
+ """Get the full path to the directory containing the current script."""
+ script_filename = os.path.abspath(sys.argv[0])
+ return os.path.dirname(script_filename)
+
+def FindAncestor(start_dir, ancestor):
+ """Finds an ancestor dir in a path.
+
+ For example, FindAncestor('c:\foo\bar\baz', 'bar') would return
+ 'c:\foo\bar'. Unlike FindUpward*, this only looks at direct path ancestors.
+ """
+ start_dir = os.path.abspath(start_dir)
+ path = start_dir
+ while True:
+ (parent, tail) = os.path.split(path)
+ if tail == ancestor:
+ return path
+ if not tail:
+ break
+ path = parent
+ raise PathNotFound("Unable to find ancestor %s in %s" % (ancestor, start_dir))
+
+def FindUpwardParent(start_dir, *desired_list):
+ """Finds the desired object's parent, searching upward from the start_dir.
+
+ Searches start_dir and all its parents looking for the desired directory
+ or file, which may be given in one or more path components. Returns the
+ first directory in which the top desired path component was found, or raises
+ PathNotFound if it wasn't.
+ """
+ desired_path = os.path.join(*desired_list)
+ last_dir = ''
+ cur_dir = start_dir
+ found_path = os.path.join(cur_dir, desired_path)
+ while not os.path.exists(found_path):
+ last_dir = cur_dir
+ cur_dir = os.path.dirname(cur_dir)
+ if last_dir == cur_dir:
+ raise PathNotFound('Unable to find %s above %s' %
+ (desired_path, start_dir))
+ found_path = os.path.join(cur_dir, desired_path)
+ # Strip the entire original desired path from the end of the one found
+ # and remove a trailing path separator, if present.
+ found_path = found_path[:len(found_path) - len(desired_path)]
+ if found_path.endswith(os.sep):
+ found_path = found_path[:len(found_path) - 1]
+ return found_path
+
+
+def FindUpward(start_dir, *desired_list):
+ """Returns a path to the desired directory or file, searching upward.
+
+ Searches start_dir and all its parents looking for the desired directory
+ or file, which may be given in one or more path components. Returns the full
+ path to the desired object, or raises PathNotFound if it wasn't found.
+ """
+ parent = FindUpwardParent(start_dir, *desired_list)
+ return os.path.join(parent, *desired_list)
+
+
+def MaybeMakeDirectory(*path):
+ """Creates an entire path, if it doesn't already exist."""
+ file_path = os.path.join(*path)
+ try:
+ os.makedirs(file_path)
+ except OSError, e:
+ # errno.EEXIST is "File exists". If we see another error, re-raise.
+ if e.errno != errno.EEXIST:
+ raise
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