##// END OF EJS Templates
merge: expand environment variables and ~/ in tool.executable...
merge: expand environment variables and ~/ in tool.executable hgrc(5) already implies that this works, so we might as well support it. Another approach would be to implement this in util.findexe(): that would benefit other callers of findexe(), e.g. convert and anyone calling the user's editor. But findexe() is really implemented in both posix.py and windows.py, so this would make both of those modules depend on util.py: not good. So keep it narrow and only for merge tools.

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pager.py
117 lines | 3.5 KiB | text/x-python | PythonLexer
# 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 or any later version.
#
# To load the extension, add it to your configuration file:
#
# [extension]
# 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 -FRSX
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. Below is the default list of commands to be paged::
[pager]
attend = annotate, cat, diff, export, glog, log, qdiff
Setting pager.attend to an empty value will cause all commands to be
paged.
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 your user configuration file.
The --pager=... option can also be used to control when the pager is
used. Use a boolean value like yes, no, on, off, or use auto for
normal behavior.
'''
import sys, os, signal, shlex, errno
from mercurial import commands, dispatch, util, extensions
from mercurial.i18n import _
def _runpager(p):
if not util.safehasattr(os, 'fork'):
sys.stdout = util.popen(p, 'wb')
if util.isatty(sys.stderr):
sys.stderr = sys.stdout
return
fdin, fdout = os.pipe()
pid = os.fork()
if pid == 0:
os.close(fdin)
os.dup2(fdout, sys.stdout.fileno())
if util.isatty(sys.stderr):
os.dup2(fdout, sys.stderr.fileno())
os.close(fdout)
return
os.dup2(fdin, sys.stdin.fileno())
os.close(fdin)
os.close(fdout)
try:
os.execvp('/bin/sh', ['/bin/sh', '-c', p])
except OSError, e:
if e.errno == errno.ENOENT:
# no /bin/sh, try executing the pager directly
args = shlex.split(p)
os.execvp(args[0], args)
else:
raise
def uisetup(ui):
if ui.plain() or '--debugger' in sys.argv or not util.isatty(sys.stdout):
return
def pagecmd(orig, ui, options, cmd, cmdfunc):
p = ui.config("pager", "pager", os.environ.get("PAGER"))
if p:
attend = ui.configlist('pager', 'attend', attended)
auto = options['pager'] == 'auto'
always = util.parsebool(options['pager'])
if (always or auto and
(cmd in attend or
(cmd not in ui.configlist('pager', 'ignore') and not attend))):
ui.setconfig('ui', 'formatted', ui.formatted())
ui.setconfig('ui', 'interactive', False)
_runpager(p)
if ui.configbool('pager', 'quiet'):
signal.signal(signal.SIGPIPE, signal.SIG_DFL)
return orig(ui, options, cmd, cmdfunc)
extensions.wrapfunction(dispatch, '_runcommand', pagecmd)
def extsetup(ui):
commands.globalopts.append(
('', 'pager', 'auto',
_("when to paginate (boolean, always, auto, or never)"),
_('TYPE')))
attended = ['annotate', 'cat', 'diff', 'export', 'glog', 'log', 'qdiff']