eol: the hook no longer requires the extension to be loaded

Reading rules in the hook means we no longer need ui to be filled and do not
need reposetup() to be run anymore.

hgext/eol.py

@@ -76,8 +76,6 b' The ``win32text.forbid*`` hooks provided'
 have been unified into a single hook named ``eol.hook``. The hook will
 lookup the expected line endings from the ``.hgeol`` file, which means
 you must migrate to a ``.hgeol`` file first before using the hook.
-Remember to enable the eol extension in the repository where you
-install the hook.
 
 See :hg:`help patterns` for more information about the glob patterns
 used.
@@ -166,6 +164,24 b' class eolfile(object):'
                 ui.warn(_("ignoring unknown EOL style '%s' from %s\n")
                         % (style, self.cfg.source('patterns', pattern)))
 
+    def checkrev(self, repo, ctx, files):
+        for f in files:
+            if f not in ctx:
+                continue
+            for pattern, style in self.cfg.items('patterns'):
+                if not match.match(repo.root, '', [pattern])(f):
+                    continue
+                target = self._encode[style.upper()]
+                data = ctx[f].data()
+                if target == "to-lf" and "\r\n" in data:
+                    raise util.Abort(_("%s should not have CRLF line endings")
+                                     % f)
+                elif target == "to-crlf" and singlelf.search(data):
+                    raise util.Abort(_("%s should not have LF line endings")
+                                     % f)
+                # Ignore other rules for this file
+                break
+
 def parseeol(ui, repo, nodes):
     try:
         for node in nodes:
@@ -190,21 +206,9 b' def hook(ui, repo, node, hooktype, **kwa'
     for rev in xrange(repo[node].rev(), len(repo)):
         files.update(repo[rev].files())
     tip = repo['tip']
-    for f in files:
-        if f not in tip:
-            continue
-        for pattern, target in ui.configitems('encode'):
-            if match.match(repo.root, '', [pattern])(f):
-                data = tip[f].data()
-                if target == "to-lf" and "\r\n" in data:
-                    raise util.Abort(_("%s should not have CRLF line endings")
-                                     % f)
-                elif target == "to-crlf" and singlelf.search(data):
-                    raise util.Abort(_("%s should not have LF line endings")
-                                     % f)
-                # Ignore other rules for this file
-                break
-
+    eol = parseeol(ui, repo, [tip.node()])
+    if eol:
+        eol.checkrev(repo, tip, files)
 
 def preupdate(ui, repo, hooktype, parent1, parent2):
     #print "preupdate for %s: %s -> %s" % (repo.root, parent1, parent2)

tests/test-eol-hook.t

@@ -2,9 +2,6 b' Test the EOL hook'
 
   $ hg init main
   $ cat > main/.hg/hgrc <<EOF
-  > [extensions]
-  > eol =
-  > 
   > [hooks]
   > pretxnchangegroup = python:hgext.eol.hook
   > EOF