IGN:...

src/calibre/utils/filenames.py

@@ -8,7 +8,7 @@ from math import ceil
 
 from calibre.ebooks.unidecode.unidecoder import Unidecoder
 from calibre import sanitize_file_name
-from calibre.constants import preferred_encoding
+from calibre.constants import preferred_encoding, iswindows
 udc = Unidecoder()
 
 def ascii_text(orig):
@@ -65,3 +65,14 @@ def shorten_components_to(length, components):
         ans.append(r)
     return ans
 
+def find_executable_in_path(name, path=None):
+    if path is None:
+        path = os.environ.get('PATH', '')
+    sep = ';' if iswindows else ':'
+    if iswindows and not name.endswith('.exe'):
+        name += '.exe'
+    path = path.split(sep)
+    for x in path:
+        q = os.path.abspath(os.path.join(x, name))
+        if os.access(q, os.X_OK):
+            return q

src/calibre/utils/sigil.py

@@ -0,0 +1,17 @@
+#!/usr/bin/env python
+# vim:fileencoding=UTF-8:ts=4:sw=4:sta:et:sts=4:ai
+from __future__ import with_statement
+
+__license__   = 'GPL v3'
+__copyright__ = '2009, Kovid Goyal <kovid@kovidgoyal.net>'
+__docformat__ = 'restructuredtext en'
+
+from calibre.utils.filenames import find_executable_in_path
+from calibre.constants import iswindows
+
+def find_executable():
+    name = 'sigil' + ('.exe' if iswindows else '')
+    path = find_executable_in_path(name)
+    #if path is None and iswindows:
+    #    path = search_program_files()
+