remove unused "head" hack from util._matcher

remove unused "head" hack from util._matcher

--- a/mercurial/cmdutil.py	Sat Mar 10 23:00:58 2007 -0300
+++ b/mercurial/cmdutil.py	Sat Mar 10 23:00:59 2007 -0300
@@ -127,16 +127,16 @@
                               pathname),
                 mode)
 
-def matchpats(repo, pats=[], opts={}, head='', globbed=False, default=None):
+def matchpats(repo, pats=[], opts={}, globbed=False, default=None):
     cwd = repo.getcwd()
     return util.cmdmatcher(repo.root, cwd, pats or [], opts.get('include'),
-                           opts.get('exclude'), head, globbed=globbed,
+                           opts.get('exclude'), globbed=globbed,
                            default=default)
 
-def walk(repo, pats=[], opts={}, node=None, head='', badmatch=None,
-         globbed=False, default=None):
-    files, matchfn, anypats = matchpats(repo, pats, opts, head,
-                                        globbed=globbed, default=default)
+def walk(repo, pats=[], opts={}, node=None, badmatch=None, globbed=False,
+         default=None):
+    files, matchfn, anypats = matchpats(repo, pats, opts, globbed=globbed,
+                                        default=default)
     exact = dict.fromkeys(files)
     for src, fn in repo.walk(node=node, files=files, match=matchfn,
                              badmatch=badmatch):

--- a/mercurial/util.py	Sat Mar 10 23:00:58 2007 -0300
+++ b/mercurial/util.py	Sat Mar 10 23:00:59 2007 -0300
@@ -378,17 +378,17 @@
 
         raise Abort('%s not under root' % myname)
 
-def matcher(canonroot, cwd='', names=[], inc=[], exc=[], head='', src=None):
-    return _matcher(canonroot, cwd, names, inc, exc, head, 'glob', src)
+def matcher(canonroot, cwd='', names=[], inc=[], exc=[], src=None):
+    return _matcher(canonroot, cwd, names, inc, exc, 'glob', src)
 
-def cmdmatcher(canonroot, cwd='', names=[], inc=[], exc=[], head='',
-               src=None, globbed=False, default=None):
+def cmdmatcher(canonroot, cwd='', names=[], inc=[], exc=[], src=None,
+               globbed=False, default=None):
     default = default or 'relpath'
     if default == 'relpath' and not globbed:
         names = expand_glob(names)
-    return _matcher(canonroot, cwd, names, inc, exc, head, default, src)
+    return _matcher(canonroot, cwd, names, inc, exc, default, src)
 
-def _matcher(canonroot, cwd, names, inc, exc, head, dflt_pat, src):
+def _matcher(canonroot, cwd, names, inc, exc, dflt_pat, src):
     """build a function to match a set of file patterns
 
     arguments:
@@ -397,7 +397,6 @@
     names - patterns to find
     inc - patterns to include
     exc - patterns to exclude
-    head - a regex to prepend to patterns to control whether a match is rooted
     dflt_pat - if a pattern in names has no explicit type, assume this one
     src - where these patterns came from (e.g. .hgignore)
 
@@ -417,9 +416,6 @@
       includes the initial part of glob: patterns that has no glob characters
     - a bool match(filename) function
     - a bool indicating if any patterns were passed in
-
-    todo:
-    make head regex a rooted bool
     """
 
     def contains_glob(name):
@@ -436,14 +432,14 @@
         elif kind == 'path':
             return '^' + re.escape(name) + '(?:/|$)'
         elif kind == 'relglob':
-            return head + globre(name, '(?:|.*/)', '(?:/|$)')
+            return globre(name, '(?:|.*/)', '(?:/|$)')
         elif kind == 'relpath':
-            return head + re.escape(name) + '(?:/|$)'
+            return re.escape(name) + '(?:/|$)'
         elif kind == 'relre':
             if name.startswith('^'):
                 return name
             return '.*' + name
-        return head + globre(name, '', tail)
+        return globre(name, '', tail)
 
     def matchfn(pats, tail):
         """build a matching function from a set of patterns"""