extensions: simplify by selecting primary hgext

mercurial/extensions.py

@@ -134,42 +134,46 b' def pathdirs():'
 def disabled():
     '''find disabled extensions from hgext
     returns a dict of {name: desc}, and the max name length'''
+
+    import hgext
+    extpath = os.path.dirname(os.path.abspath(hgext.__file__))
+
     exts = {}
     maxlength = 0
-    for dir in filter(os.path.isdir,
-                      (os.path.join(pd, 'hgext') for pd in pathdirs())):
-        for e in os.listdir(dir):
-            if e.endswith('.py'):
-                name = e.rsplit('.', 1)[0]
-                path = os.path.join(dir, e)
-            else:
-                name = e
-                path = os.path.join(dir, e, '__init__.py')
+    for e in os.listdir(extpath):
 
-            if name in exts or name == '__init__' or not os.path.exists(path):
-                continue
+        if e.endswith('.py'):
+            name = e.rsplit('.', 1)[0]
+            path = os.path.join(extpath, e)
+        else:
+            name = e
+            path = os.path.join(extpath, e, '__init__.py')
+
+        if name in exts or name == '__init__' or not os.path.exists(path):
+            continue
 
-            try:
-                find(name)
-            except KeyError:
-                pass
-            else:
-                continue # enabled extension
+        try:
+            find(name)
+        except KeyError:
+            pass
+        else:
+            continue # enabled extension
 
-            try:
-                file = open(path)
-            except IOError:
-                continue
-            else:
-                doc = help.moduledoc(file)
-                file.close()
+        try:
+            file = open(path)
+        except IOError:
+            continue
+        else:
+            doc = help.moduledoc(file)
+            file.close()
 
-            if doc: # extracting localized synopsis
-                exts[name] = gettext(doc).splitlines()[0]
-            else:
-                exts[name] = _('(no help text available)')
-            if len(name) > maxlength:
-                maxlength = len(name)
+        if doc: # extracting localized synopsis
+            exts[name] = gettext(doc).splitlines()[0]
+        else:
+            exts[name] = _('(no help text available)')
+
+        if len(name) > maxlength:
+            maxlength = len(name)
 
     return exts, maxlength