# HG changeset patch
# User jfh <jason@jasonfharris.com>
# Date 1295103723 -3600
# Node ID 3e66eec9a8142b1f2127c6c791cab52983abe9b4
# Parent  104c9ed93fc524a32358c066f78f3fe0a4a6ef40
add debugignore which yields the combined ignore patten of the .hgignore files

For GUI clients its sometimes important to know which files will be ignored and
which files will be important. This allows the GUI client to skipping redoing a
'hg status' when the files are ignored but have changed. (For instance, a
typical case is that the "build" directory inside some project is ignored but
files in it frequently change.)

diff -r 104c9ed93fc5 -r 3e66eec9a814 mercurial/commands.py
--- a/mercurial/commands.py	Fri Feb 04 16:32:14 2011 -0300
+++ b/mercurial/commands.py	Sat Jan 15 16:02:03 2011 +0100
@@ -1351,6 +1351,11 @@
         m = util.matchdate(range)
         ui.write("match: %s\n" % m(d[0]))
 
+def debugignore(ui, repo, *values, **opts):
+    """display the combined ignore pattern"""
+    ignore = repo.dirstate._ignore
+    ui.write("%s\n" % ignore.includepat)
+
 def debugindex(ui, repo, file_, **opts):
     """dump the contents of an index file"""
     r = None
@@ -4347,6 +4352,7 @@
          _('[-e] DATE [RANGE]')),
     "debugdata": (debugdata, [], _('FILE REV')),
     "debugfsinfo": (debugfsinfo, [], _('[PATH]')),
+    "debugignore": (debugignore, [], ''),
     "debugindex": (debugindex,
                    [('f', 'format', 0, _('revlog format'), _('FORMAT'))],
                    _('FILE')),
diff -r 104c9ed93fc5 -r 3e66eec9a814 mercurial/match.py
--- a/mercurial/match.py	Fri Feb 04 16:32:14 2011 -0300
+++ b/mercurial/match.py	Sat Jan 15 16:02:03 2011 +0100
@@ -39,11 +39,11 @@
         self._anypats = bool(include or exclude)
 
         if include:
-            im = _buildmatch(_normalize(include, 'glob', root, cwd, auditor),
-                             '(?:/|$)')
+            pats = _normalize(include, 'glob', root, cwd, auditor)
+            self.includepat, im = _buildmatch(pats, '(?:/|$)')
         if exclude:
-            em = _buildmatch(_normalize(exclude, 'glob', root, cwd, auditor),
-                             '(?:/|$)')
+            pats = _normalize(exclude, 'glob', root, cwd, auditor)
+            self.excludepat, em = _buildmatch(pats, '(?:/|$)')
         if exact:
             self._files = patterns
             pm = self.exact
@@ -51,7 +51,7 @@
             pats = _normalize(patterns, default, root, cwd, auditor)
             self._files = _roots(pats)
             self._anypats = self._anypats or _anypats(pats)
-            pm = _buildmatch(pats, '$')
+            self.patternspat, pm = _buildmatch(pats, '$')
 
         if patterns or exact:
             if include:
@@ -246,7 +246,7 @@
         pat = '(?:%s)' % '|'.join([_regex(k, p, tail) for (k, p) in pats])
         if len(pat) > 20000:
             raise OverflowError()
-        return re.compile(pat).match
+        return pat, re.compile(pat).match
     except OverflowError:
         # We're using a Python with a tiny regex engine and we
         # made it explode, so we'll divide the pattern list in two
@@ -254,8 +254,9 @@
         l = len(pats)
         if l < 2:
             raise
-        a, b = _buildmatch(pats[:l//2], tail), _buildmatch(pats[l//2:], tail)
-        return lambda s: a(s) or b(s)
+        pata, a = _buildmatch(pats[:l//2], tail),
+        patb, b = _buildmatch(pats[l//2:], tail)
+        return pat, lambda s: a(s) or b(s)
     except re.error:
         for k, p in pats:
             try:
diff -r 104c9ed93fc5 -r 3e66eec9a814 tests/test-debugcomplete.t
--- a/tests/test-debugcomplete.t	Fri Feb 04 16:32:14 2011 -0300
+++ b/tests/test-debugcomplete.t	Sat Jan 15 16:02:03 2011 +0100
@@ -75,6 +75,7 @@
   debugdata
   debugdate
   debugfsinfo
+  debugignore
   debugindex
   debugindexdot
   debuginstall
@@ -214,6 +215,7 @@
   debugdata: 
   debugdate: extended
   debugfsinfo: 
+  debugignore: 
   debugindex: format
   debugindexdot: 
   debuginstall: 
diff -r 104c9ed93fc5 -r 3e66eec9a814 tests/test-hgignore.t
--- a/tests/test-hgignore.t	Fri Feb 04 16:32:14 2011 -0300
+++ b/tests/test-hgignore.t	Sat Jan 15 16:02:03 2011 +0100
@@ -120,3 +120,5 @@
   $ hg status .
   A b.o
 
+  $ hg debugignore
+  (?:(?:|.*/)[^/]*(?:/|$))