diff -r 000000000000 -r de9c2efb9d02 DebugClients/Python3/coverage/files.py
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/DebugClients/Python3/coverage/files.py Mon Dec 28 16:03:33 2009 +0000
@@ -0,0 +1,70 @@
+"""File wrangling."""
+
+import os, sys
+
+class FileLocator:
+ """Understand how filenames work."""
+
+ def __init__(self):
+ self.relative_dir = self.abs_file(os.curdir) + os.sep
+
+ # Cache of results of calling the canonical_filename() method, to
+ # avoid duplicating work.
+ self.canonical_filename_cache = {}
+
+ def abs_file(self, filename):
+ """Return the absolute normalized form of `filename`."""
+ return os.path.normcase(os.path.abspath(os.path.realpath(filename)))
+
+ def relative_filename(self, filename):
+ """Return the relative form of `filename`.
+
+ The filename will be relative to the current directory when the
+ FileLocator was constructed.
+
+ """
+ return filename.replace(self.relative_dir, "")
+
+ def canonical_filename(self, filename):
+ """Return a canonical filename for `filename`.
+
+ An absolute path with no redundant components and normalized case.
+
+ """
+ if filename not in self.canonical_filename_cache:
+ f = filename
+ if os.path.isabs(f) and not os.path.exists(f):
+ if not self.get_zip_data(f):
+ f = os.path.basename(f)
+ if not os.path.isabs(f):
+ for path in [os.curdir] + sys.path:
+ g = os.path.join(path, f)
+ if os.path.exists(g):
+ f = g
+ break
+ cf = self.abs_file(f)
+ self.canonical_filename_cache[filename] = cf
+ return self.canonical_filename_cache[filename]
+
+ def get_zip_data(self, filename):
+ """Get data from `filename` if it is a zip file path.
+
+ Returns the data read from the zip file, or None if no zip file could
+ be found or `filename` isn't in it.
+
+ """
+ import zipimport
+ markers = ['.zip'+os.sep, '.egg'+os.sep]
+ for marker in markers:
+ if marker in filename:
+ parts = filename.split(marker)
+ try:
+ zi = zipimport.zipimporter(parts[0]+marker[:-1])
+ except zipimport.ZipImportError:
+ continue
+ try:
+ data = zi.get_data(parts[1])
+ except IOError:
+ continue
+ return data
+ return None
