Initial commit

Signed-off-by: Jan Pokorný <jpokorny@redhat.com>

1 files changed, 65 insertions, 0 deletions

diff --git a/utils.py b/utils.py
new file mode 100644
index 0000000..57f4d89
--- /dev/null
+++ b/utils.py
@@ -0,0 +1,65 @@
+# -*- coding: UTF-8 -*-
+# Copyright 2012 Red Hat, Inc.
+# Part of clufter project
+# Licensed under GPLv2 (a copy included | http://gnu.org/licenses/gpl-2.0.txt)
+
+import os
+
+
+# name the exitcodes
+ecodes = 'SUCCESS', 'FAILURE'
+EC = type('EC', (), {n: v for v, n in enumerate('EXIT_' + i for i in ecodes)})
+
+
+head_tail = lambda x=None, *y: (x, x if x is None else y)
+filtervars = lambda src,which: {x: src[x] for x in which if x in src}
+filtervarsdef = lambda src,which: {x: src[x] for x in which if src.get(x, None)}
+filtervarspop = lambda src,which: {x: src.pop(x) for x in which if x in src}
+
+
+def which(name, *where):
+    where = tuple(os.path.abspath(i) for i in where)
+    if 'PATH' in os.environ:
+        path = tuple(i for i in os.environ['PATH'].split(os.pathsep)
+                     if len(i.strip()))
+    else:
+        path = ()
+    for p in where + path:
+        check = os.path.join(p, name)
+        if os.path.exists(check):
+            return check
+    else:
+        return None
+
+
+class ClufterError(Exception):
+    def __init__(self, ctx_self, msg, *args):
+        self.ctx_self = ctx_self
+        self.msg = msg
+
+    def __str__(self):
+        ret = getattr(self.ctx_self, '__name__',
+                      self.ctx_self.__class__.__name__)
+        return ret + ': ' + self.msg.format(*self.args)
+
+
+class ClufterPlainError(ClufterError):
+    def __init__(self, msg, *args):
+        super(ClufterPlainError, self).__init__(self, None, msg, *args)
+
+
+# Inspired by http://stackoverflow.com/a/1383402
+class classproperty(property):
+    def __init__(self, fnc):
+        property.__init__(self, classmethod(fnc))
+
+    def __get__(self, this, owner):
+        return self.fget.__get__(None, owner)()
+
+
+class hybridproperty(property):
+    def __init__(self, fnc):
+        property.__init__(self, classmethod(fnc))
+
+    def __get__(self, this, owner):
+        return self.fget.__get__(None, this if this else owner)()