Mercurial > hg
view hgext/pager.py @ 21601:7ff01befc7ec
bundle2: track life cycle of parts
We introduce a ``_generated`` attribute on parts. Coming changesets will
make it easier to update a part's contents after its creation. We need a way to track
if the part is still open to modification or if it is currently being generated
and should not be touched anymore.
As a bonus, we can now detect and crash if someone manages to write bogus code
to get a part generated twice.
author | Pierre-Yves David <pierre-yves.david@fb.com> |
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date | Thu, 22 May 2014 11:14:02 -0700 |
parents | bcddddcf0b54 |
children | afdf5f6ab37a |
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# 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 -FRX 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. 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. Lastly, you can enable and disable paging for individual commands with the attend-<command> option. This setting takes precedence over existing attend and ignore options and defaults:: [pager] attend-cat = false 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 atexit, sys, os, signal, subprocess, errno, shlex from mercurial import commands, dispatch, util, extensions, cmdutil from mercurial.i18n import _ testedwith = 'internal' def _pagerfork(ui, p): if not util.safehasattr(os, 'fork'): sys.stdout = util.popen(p, 'wb') if ui._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 ui._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 _pagersubprocess(ui, p): pager = subprocess.Popen(p, shell=True, bufsize=-1, close_fds=util.closefds, stdin=subprocess.PIPE, stdout=sys.stdout, stderr=sys.stderr) stdout = os.dup(sys.stdout.fileno()) stderr = os.dup(sys.stderr.fileno()) os.dup2(pager.stdin.fileno(), sys.stdout.fileno()) if ui._isatty(sys.stderr): os.dup2(pager.stdin.fileno(), sys.stderr.fileno()) @atexit.register def killpager(): if util.safehasattr(signal, "SIGINT"): signal.signal(signal.SIGINT, signal.SIG_IGN) pager.stdin.close() os.dup2(stdout, sys.stdout.fileno()) os.dup2(stderr, sys.stderr.fileno()) pager.wait() def _runpager(ui, p): # The subprocess module shipped with Python <= 2.4 is buggy (issue3533). # The compat version is buggy on Windows (issue3225), but has been shipping # with hg for a long time. Preserve existing functionality. if sys.version_info >= (2, 5): _pagersubprocess(ui, p) else: _pagerfork(ui, p) def uisetup(ui): if '--debugger' in sys.argv or not ui.formatted(): return def pagecmd(orig, ui, options, cmd, cmdfunc): p = ui.config("pager", "pager", os.environ.get("PAGER")) usepager = False always = util.parsebool(options['pager']) auto = options['pager'] == 'auto' if not p: pass elif always: usepager = True elif not auto: usepager = False else: attend = ui.configlist('pager', 'attend', attended) ignore = ui.configlist('pager', 'ignore') cmds, _ = cmdutil.findcmd(cmd, commands.table) for cmd in cmds: var = 'attend-%s' % cmd if ui.config('pager', var): usepager = ui.configbool('pager', var) break if (cmd in attend or (cmd not in ignore and not attend)): usepager = True break if usepager: ui.setconfig('ui', 'formatted', ui.formatted(), 'pager') ui.setconfig('ui', 'interactive', False, 'pager') if util.safehasattr(signal, "SIGPIPE"): signal.signal(signal.SIGPIPE, signal.SIG_DFL) _runpager(ui, p) 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']