Stop overwriting the CompileFilter's options attribute in the __init__ method. Added optional test for the CSSTidy filter. Fixes issue #33.

1 files changed, 29 insertions, 0 deletions

diff --git a/compressor/utils/__init__.py b/compressor/utils/__init__.py
index 2c13265..699e37d 100644
--- a/compressor/utils/__init__.py
+++ b/compressor/utils/__init__.py
@@ -57,3 +57,32 @@ def walk(root, topdown=True, onerror=None, followlinks=False):
                 if os.path.islink(p):
                     for link_dirpath, link_dirnames, link_filenames in walk(p):
                         yield (link_dirpath, link_dirnames, link_filenames)
+
+
+def find_command(cmd, paths=None, pathext=None):
+    """
+    Searches the PATH for the given command and returns its path
+    """
+    if paths is None:
+        paths = os.environ.get('PATH', []).split(os.pathsep)
+    if isinstance(paths, basestring):
+        paths = [paths]
+    # check if there are funny path extensions for executables, e.g. Windows
+    if pathext is None:
+        pathext = os.environ.get('PATHEXT', '.COM;.EXE;.BAT;.CMD')
+    pathext = [ext for ext in pathext.lower().split(os.pathsep)]
+    # don't use extensions if the command ends with one of them
+    if os.path.splitext(cmd)[1].lower() in pathext:
+        pathext = ['']
+    # check if we find the command on PATH
+    for path in paths:
+        # try without extension first
+        cmd_path = os.path.join(path, cmd)
+        for ext in pathext:
+            # then including the extension
+            cmd_path_ext = cmd_path + ext
+            if os.path.isfile(cmd_path_ext):
+                return cmd_path_ext
+        if os.path.isfile(cmd_path):
+            return cmd_path
+    return None