add hg and python

sys/lib/python/hgext/pager.py

@@ -0,0 +1,64 @@
+# pager.py - display output using a pager
+#
+# Copyright 2008 David Soria Parra <dsp@php.net>
+#
+# This software may be used and distributed according to the terms of the
+# GNU General Public License version 2, incorporated herein by reference.
+#
+# To load the extension, add it to your .hgrc file:
+#
+#   [extension]
+#   hgext.pager =
+#
+# Run "hg help pager" to get info on configuration.
+
+'''browse command output with an external pager
+
+To set the pager that should be used, set the application variable::
+
+  [pager]
+  pager = LESS='FSRX' less
+
+If no pager is set, the pager extensions uses the environment variable
+$PAGER. If neither pager.pager, nor $PAGER is set, no pager is used.
+
+If you notice "BROKEN PIPE" error messages, you can disable them by
+setting::
+
+  [pager]
+  quiet = True
+
+You can disable the pager for certain commands by adding them to the
+pager.ignore list::
+
+  [pager]
+  ignore = version, help, update
+
+You can also enable the pager only for certain commands using
+pager.attend::
+
+  [pager]
+  attend = log
+
+If pager.attend is present, pager.ignore will be ignored.
+
+To ignore global commands like "hg version" or "hg help", you have to
+specify them in the global .hgrc
+'''
+
+import sys, os, signal
+from mercurial import dispatch, util, extensions
+
+def uisetup(ui):
+    def pagecmd(orig, ui, options, cmd, cmdfunc):
+        p = ui.config("pager", "pager", os.environ.get("PAGER"))
+        if p and sys.stdout.isatty() and '--debugger' not in sys.argv:
+            attend = ui.configlist('pager', 'attend')
+            if (cmd in attend or
+                (cmd not in ui.configlist('pager', 'ignore') and not attend)):
+                sys.stderr = sys.stdout = util.popen(p, "wb")
+                if ui.configbool('pager', 'quiet'):
+                    signal.signal(signal.SIGPIPE, signal.SIG_DFL)
+        return orig(ui, options, cmd, cmdfunc)
+
+    extensions.wrapfunction(dispatch, '_runcommand', pagecmd)