Mercurial > hg
view mercurial/ui.py @ 45095:8e04607023e5
procutil: ensure that procutil.std{out,err}.write() writes all bytes
Python 3 offers different kind of streams and it’s not guaranteed for all of
them that calling write() writes all bytes.
When Python is started in unbuffered mode, sys.std{out,err}.buffer are
instances of io.FileIO, whose write() can write less bytes for
platform-specific reasons (e.g. Linux has a 0x7ffff000 bytes maximum and could
write less if interrupted by a signal; when writing to Windows consoles, it’s
limited to 32767 bytes to avoid the "not enough space" error). This can lead to
silent loss of data, both when using sys.std{out,err}.buffer (which may in fact
not be a buffered stream) and when using the text streams sys.std{out,err}
(I’ve created a CPython bug report for that:
https://bugs.python.org/issue41221).
Python may fix the problem at some point. For now, we implement our own wrapper
for procutil.std{out,err} that calls the raw stream’s write() method until all
bytes have been written. We don’t use sys.std{out,err} for larger writes, so I
think it’s not worth the effort to patch them.
| author | Manuel Jacob <me@manueljacob.de> |
|---|---|
| date | Fri, 10 Jul 2020 12:27:58 +0200 |
| parents | 02b17231f6c3 |
| children | 14ac6a74e7e7 ed84a4d48910 |
line wrap: on
line source
# ui.py - user interface bits for mercurial # # Copyright 2005-2007 Matt Mackall <mpm@selenic.com> # # This software may be used and distributed according to the terms of the # GNU General Public License version 2 or any later version. from __future__ import absolute_import import collections import contextlib import datetime import errno import getpass import inspect import os import re import signal import socket import subprocess import sys import traceback from .i18n import _ from .node import hex from .pycompat import ( getattr, open, setattr, ) from . import ( color, config, configitems, encoding, error, formatter, loggingutil, progress, pycompat, rcutil, scmutil, util, ) from .utils import ( dateutil, procutil, resourceutil, stringutil, ) urlreq = util.urlreq # for use with str.translate(None, _keepalnum), to keep just alphanumerics _keepalnum = b''.join( c for c in map(pycompat.bytechr, range(256)) if not c.isalnum() ) # The config knobs that will be altered (if unset) by ui.tweakdefaults. tweakrc = b""" [ui] # The rollback command is dangerous. As a rule, don't use it. rollback = False # Make `hg status` report copy information statuscopies = yes # Prefer curses UIs when available. Revert to plain-text with `text`. interface = curses # Make compatible commands emit cwd-relative paths by default. relative-paths = yes [commands] # Grep working directory by default. grep.all-files = True # Refuse to perform an `hg update` that would cause a file content merge update.check = noconflict # Show conflicts information in `hg status` status.verbose = True # Make `hg resolve` with no action (like `-m`) fail instead of re-merging. resolve.explicit-re-merge = True [diff] git = 1 showfunc = 1 word-diff = 1 """ samplehgrcs = { b'user': b"""# example user config (see 'hg help config' for more info) [ui] # name and email, e.g. # username = Jane Doe <jdoe@example.com> username = # We recommend enabling tweakdefaults to get slight improvements to # the UI over time. Make sure to set HGPLAIN in the environment when # writing scripts! # tweakdefaults = True # uncomment to disable color in command output # (see 'hg help color' for details) # color = never # uncomment to disable command output pagination # (see 'hg help pager' for details) # paginate = never [extensions] # uncomment the lines below to enable some popular extensions # (see 'hg help extensions' for more info) # # histedit = # rebase = # uncommit = """, b'cloned': b"""# example repository config (see 'hg help config' for more info) [paths] default = %s # path aliases to other clones of this repo in URLs or filesystem paths # (see 'hg help config.paths' for more info) # # default:pushurl = ssh://jdoe@example.net/hg/jdoes-fork # my-fork = ssh://jdoe@example.net/hg/jdoes-fork # my-clone = /home/jdoe/jdoes-clone [ui] # name and email (local to this repository, optional), e.g. # username = Jane Doe <jdoe@example.com> """, b'local': b"""# example repository config (see 'hg help config' for more info) [paths] # path aliases to other clones of this repo in URLs or filesystem paths # (see 'hg help config.paths' for more info) # # default = http://example.com/hg/example-repo # default:pushurl = ssh://jdoe@example.net/hg/jdoes-fork # my-fork = ssh://jdoe@example.net/hg/jdoes-fork # my-clone = /home/jdoe/jdoes-clone [ui] # name and email (local to this repository, optional), e.g. # username = Jane Doe <jdoe@example.com> """, b'global': b"""# example system-wide hg config (see 'hg help config' for more info) [ui] # uncomment to disable color in command output # (see 'hg help color' for details) # color = never # uncomment to disable command output pagination # (see 'hg help pager' for details) # paginate = never [extensions] # uncomment the lines below to enable some popular extensions # (see 'hg help extensions' for more info) # # blackbox = # churn = """, } def _maybestrurl(maybebytes): return pycompat.rapply(pycompat.strurl, maybebytes) def _maybebytesurl(maybestr): return pycompat.rapply(pycompat.bytesurl, maybestr) class httppasswordmgrdbproxy(object): """Delays loading urllib2 until it's needed.""" def __init__(self): self._mgr = None def _get_mgr(self): if self._mgr is None: self._mgr = urlreq.httppasswordmgrwithdefaultrealm() return self._mgr def add_password(self, realm, uris, user, passwd): return self._get_mgr().add_password( _maybestrurl(realm), _maybestrurl(uris), _maybestrurl(user), _maybestrurl(passwd), ) def find_user_password(self, realm, uri): mgr = self._get_mgr() return _maybebytesurl( mgr.find_user_password(_maybestrurl(realm), _maybestrurl(uri)) ) def _catchterm(*args): raise error.SignalInterrupt # unique object used to detect no default value has been provided when # retrieving configuration value. _unset = object() # _reqexithandlers: callbacks run at the end of a request _reqexithandlers = [] class ui(object): def __init__(self, src=None): """Create a fresh new ui object if no src given Use uimod.ui.load() to create a ui which knows global and user configs. In most cases, you should use ui.copy() to create a copy of an existing ui object. """ # _buffers: used for temporary capture of output self._buffers = [] # 3-tuple describing how each buffer in the stack behaves. # Values are (capture stderr, capture subprocesses, apply labels). self._bufferstates = [] # When a buffer is active, defines whether we are expanding labels. # This exists to prevent an extra list lookup. self._bufferapplylabels = None self.quiet = self.verbose = self.debugflag = self.tracebackflag = False self._reportuntrusted = True self._knownconfig = configitems.coreitems self._ocfg = config.config() # overlay self._tcfg = config.config() # trusted self._ucfg = config.config() # untrusted self._trustusers = set() self._trustgroups = set() self.callhooks = True # Insecure server connections requested. self.insecureconnections = False # Blocked time self.logblockedtimes = False # color mode: see mercurial/color.py for possible value self._colormode = None self._terminfoparams = {} self._styles = {} self._uninterruptible = False self.showtimestamp = False if src: self._fout = src._fout self._ferr = src._ferr self._fin = src._fin self._fmsg = src._fmsg self._fmsgout = src._fmsgout self._fmsgerr = src._fmsgerr self._finoutredirected = src._finoutredirected self._loggers = src._loggers.copy() self.pageractive = src.pageractive self._disablepager = src._disablepager self._tweaked = src._tweaked self._tcfg = src._tcfg.copy() self._ucfg = src._ucfg.copy() self._ocfg = src._ocfg.copy() self._trustusers = src._trustusers.copy() self._trustgroups = src._trustgroups.copy() self.environ = src.environ self.callhooks = src.callhooks self.insecureconnections = src.insecureconnections self._colormode = src._colormode self._terminfoparams = src._terminfoparams.copy() self._styles = src._styles.copy() self.fixconfig() self.httppasswordmgrdb = src.httppasswordmgrdb self._blockedtimes = src._blockedtimes else: self._fout = procutil.stdout self._ferr = procutil.stderr self._fin = procutil.stdin self._fmsg = None self._fmsgout = self.fout # configurable self._fmsgerr = self.ferr # configurable self._finoutredirected = False self._loggers = {} self.pageractive = False self._disablepager = False self._tweaked = False # shared read-only environment self.environ = encoding.environ self.httppasswordmgrdb = httppasswordmgrdbproxy() self._blockedtimes = collections.defaultdict(int) allowed = self.configlist(b'experimental', b'exportableenviron') if b'*' in allowed: self._exportableenviron = self.environ else: self._exportableenviron = {} for k in allowed: if k in self.environ: self._exportableenviron[k] = self.environ[k] @classmethod def load(cls): """Create a ui and load global and user configs""" u = cls() # we always trust global config files and environment variables for t, f in rcutil.rccomponents(): if t == b'path': u.readconfig(f, trust=True) elif t == b'resource': u.read_resource_config(f, trust=True) elif t == b'items': sections = set() for section, name, value, source in f: # do not set u._ocfg # XXX clean this up once immutable config object is a thing u._tcfg.set(section, name, value, source) u._ucfg.set(section, name, value, source) sections.add(section) for section in sections: u.fixconfig(section=section) else: raise error.ProgrammingError(b'unknown rctype: %s' % t) u._maybetweakdefaults() return u def _maybetweakdefaults(self): if not self.configbool(b'ui', b'tweakdefaults'): return if self._tweaked or self.plain(b'tweakdefaults'): return # Note: it is SUPER IMPORTANT that you set self._tweaked to # True *before* any calls to setconfig(), otherwise you'll get # infinite recursion between setconfig and this method. # # TODO: We should extract an inner method in setconfig() to # avoid this weirdness. self._tweaked = True tmpcfg = config.config() tmpcfg.parse(b'<tweakdefaults>', tweakrc) for section in tmpcfg: for name, value in tmpcfg.items(section): if not self.hasconfig(section, name): self.setconfig(section, name, value, b"<tweakdefaults>") def copy(self): return self.__class__(self) def resetstate(self): """Clear internal state that shouldn't persist across commands""" if self._progbar: self._progbar.resetstate() # reset last-print time of progress bar self.httppasswordmgrdb = httppasswordmgrdbproxy() @contextlib.contextmanager def timeblockedsection(self, key): # this is open-coded below - search for timeblockedsection to find them starttime = util.timer() try: yield finally: self._blockedtimes[key + b'_blocked'] += ( util.timer() - starttime ) * 1000 @contextlib.contextmanager def uninterruptible(self): """Mark an operation as unsafe. Most operations on a repository are safe to interrupt, but a few are risky (for example repair.strip). This context manager lets you advise Mercurial that something risky is happening so that control-C etc can be blocked if desired. """ enabled = self.configbool(b'experimental', b'nointerrupt') if enabled and self.configbool( b'experimental', b'nointerrupt-interactiveonly' ): enabled = self.interactive() if self._uninterruptible or not enabled: # if nointerrupt support is turned off, the process isn't # interactive, or we're already in an uninterruptible # block, do nothing. yield return def warn(): self.warn(_(b"shutting down cleanly\n")) self.warn( _(b"press ^C again to terminate immediately (dangerous)\n") ) return True with procutil.uninterruptible(warn): try: self._uninterruptible = True yield finally: self._uninterruptible = False def formatter(self, topic, opts): return formatter.formatter(self, self, topic, opts) def _trusted(self, fp, f): st = util.fstat(fp) if util.isowner(st): return True tusers, tgroups = self._trustusers, self._trustgroups if b'*' in tusers or b'*' in tgroups: return True user = util.username(st.st_uid) group = util.groupname(st.st_gid) if user in tusers or group in tgroups or user == util.username(): return True if self._reportuntrusted: self.warn( _( b'not trusting file %s from untrusted ' b'user %s, group %s\n' ) % (f, user, group) ) return False def read_resource_config( self, name, root=None, trust=False, sections=None, remap=None ): try: fp = resourceutil.open_resource(name[0], name[1]) except IOError: if not sections: # ignore unless we were looking for something return raise self._readconfig( b'resource:%s.%s' % name, fp, root, trust, sections, remap ) def readconfig( self, filename, root=None, trust=False, sections=None, remap=None ): try: fp = open(filename, 'rb') except IOError: if not sections: # ignore unless we were looking for something return raise self._readconfig(filename, fp, root, trust, sections, remap) def _readconfig( self, filename, fp, root=None, trust=False, sections=None, remap=None ): with fp: cfg = config.config() trusted = sections or trust or self._trusted(fp, filename) try: cfg.read(filename, fp, sections=sections, remap=remap) except error.ParseError as inst: if trusted: raise self.warn(_(b'ignored: %s\n') % stringutil.forcebytestr(inst)) self._applyconfig(cfg, trusted, root) def applyconfig(self, configitems, source=b"", root=None): """Add configitems from a non-file source. Unlike with ``setconfig()``, they can be overridden by subsequent config file reads. The items are in the same format as ``configoverride()``, namely a dict of the following structures: {(section, name) : value} Typically this is used by extensions that inject themselves into the config file load procedure by monkeypatching ``localrepo.loadhgrc()``. """ cfg = config.config() for (section, name), value in configitems.items(): cfg.set(section, name, value, source) self._applyconfig(cfg, True, root) def _applyconfig(self, cfg, trusted, root): if self.plain(): for k in ( b'debug', b'fallbackencoding', b'quiet', b'slash', b'logtemplate', b'message-output', b'statuscopies', b'style', b'traceback', b'verbose', ): if k in cfg[b'ui']: del cfg[b'ui'][k] for k, v in cfg.items(b'defaults'): del cfg[b'defaults'][k] for k, v in cfg.items(b'commands'): del cfg[b'commands'][k] # Don't remove aliases from the configuration if in the exceptionlist if self.plain(b'alias'): for k, v in cfg.items(b'alias'): del cfg[b'alias'][k] if self.plain(b'revsetalias'): for k, v in cfg.items(b'revsetalias'): del cfg[b'revsetalias'][k] if self.plain(b'templatealias'): for k, v in cfg.items(b'templatealias'): del cfg[b'templatealias'][k] if trusted: self._tcfg.update(cfg) self._tcfg.update(self._ocfg) self._ucfg.update(cfg) self._ucfg.update(self._ocfg) if root is None: root = os.path.expanduser(b'~') self.fixconfig(root=root) def fixconfig(self, root=None, section=None): if section in (None, b'paths'): # expand vars and ~ # translate paths relative to root (or home) into absolute paths root = root or encoding.getcwd() for c in self._tcfg, self._ucfg, self._ocfg: for n, p in c.items(b'paths'): # Ignore sub-options. if b':' in n: continue if not p: continue if b'%%' in p: s = self.configsource(b'paths', n) or b'none' self.warn( _(b"(deprecated '%%' in path %s=%s from %s)\n") % (n, p, s) ) p = p.replace(b'%%', b'%') p = util.expandpath(p) if not util.hasscheme(p) and not os.path.isabs(p): p = os.path.normpath(os.path.join(root, p)) c.set(b"paths", n, p) if section in (None, b'ui'): # update ui options self._fmsgout, self._fmsgerr = _selectmsgdests(self) self.debugflag = self.configbool(b'ui', b'debug') self.verbose = self.debugflag or self.configbool(b'ui', b'verbose') self.quiet = not self.debugflag and self.configbool(b'ui', b'quiet') if self.verbose and self.quiet: self.quiet = self.verbose = False self._reportuntrusted = self.debugflag or self.configbool( b"ui", b"report_untrusted" ) self.showtimestamp = self.configbool(b'ui', b'timestamp-output') self.tracebackflag = self.configbool(b'ui', b'traceback') self.logblockedtimes = self.configbool(b'ui', b'logblockedtimes') if section in (None, b'trusted'): # update trust information self._trustusers.update(self.configlist(b'trusted', b'users')) self._trustgroups.update(self.configlist(b'trusted', b'groups')) if section in (None, b'devel', b'ui') and self.debugflag: tracked = set() if self.configbool(b'devel', b'debug.extensions'): tracked.add(b'extension') if tracked: logger = loggingutil.fileobjectlogger(self._ferr, tracked) self.setlogger(b'debug', logger) def backupconfig(self, section, item): return ( self._ocfg.backup(section, item), self._tcfg.backup(section, item), self._ucfg.backup(section, item), ) def restoreconfig(self, data): self._ocfg.restore(data[0]) self._tcfg.restore(data[1]) self._ucfg.restore(data[2]) def setconfig(self, section, name, value, source=b''): for cfg in (self._ocfg, self._tcfg, self._ucfg): cfg.set(section, name, value, source) self.fixconfig(section=section) self._maybetweakdefaults() def _data(self, untrusted): return untrusted and self._ucfg or self._tcfg def configsource(self, section, name, untrusted=False): return self._data(untrusted).source(section, name) def config(self, section, name, default=_unset, untrusted=False): """return the plain string version of a config""" value = self._config( section, name, default=default, untrusted=untrusted ) if value is _unset: return None return value def _config(self, section, name, default=_unset, untrusted=False): value = itemdefault = default item = self._knownconfig.get(section, {}).get(name) alternates = [(section, name)] if item is not None: alternates.extend(item.alias) if callable(item.default): itemdefault = item.default() else: itemdefault = item.default else: msg = b"accessing unregistered config item: '%s.%s'" msg %= (section, name) self.develwarn(msg, 2, b'warn-config-unknown') if default is _unset: if item is None: value = default elif item.default is configitems.dynamicdefault: value = None msg = b"config item requires an explicit default value: '%s.%s'" msg %= (section, name) self.develwarn(msg, 2, b'warn-config-default') else: value = itemdefault elif ( item is not None and item.default is not configitems.dynamicdefault and default != itemdefault ): msg = ( b"specifying a mismatched default value for a registered " b"config item: '%s.%s' '%s'" ) msg %= (section, name, pycompat.bytestr(default)) self.develwarn(msg, 2, b'warn-config-default') for s, n in alternates: candidate = self._data(untrusted).get(s, n, None) if candidate is not None: value = candidate break if self.debugflag and not untrusted and self._reportuntrusted: for s, n in alternates: uvalue = self._ucfg.get(s, n) if uvalue is not None and uvalue != value: self.debug( b"ignoring untrusted configuration option " b"%s.%s = %s\n" % (s, n, uvalue) ) return value def configsuboptions(self, section, name, default=_unset, untrusted=False): """Get a config option and all sub-options. Some config options have sub-options that are declared with the format "key:opt = value". This method is used to return the main option and all its declared sub-options. Returns a 2-tuple of ``(option, sub-options)``, where `sub-options`` is a dict of defined sub-options where keys and values are strings. """ main = self.config(section, name, default, untrusted=untrusted) data = self._data(untrusted) sub = {} prefix = b'%s:' % name for k, v in data.items(section): if k.startswith(prefix): sub[k[len(prefix) :]] = v if self.debugflag and not untrusted and self._reportuntrusted: for k, v in sub.items(): uvalue = self._ucfg.get(section, b'%s:%s' % (name, k)) if uvalue is not None and uvalue != v: self.debug( b'ignoring untrusted configuration option ' b'%s:%s.%s = %s\n' % (section, name, k, uvalue) ) return main, sub def configpath(self, section, name, default=_unset, untrusted=False): """get a path config item, expanded relative to repo root or config file""" v = self.config(section, name, default, untrusted) if v is None: return None if not os.path.isabs(v) or b"://" not in v: src = self.configsource(section, name, untrusted) if b':' in src: base = os.path.dirname(src.rsplit(b':')[0]) v = os.path.join(base, os.path.expanduser(v)) return v def configbool(self, section, name, default=_unset, untrusted=False): """parse a configuration element as a boolean >>> u = ui(); s = b'foo' >>> u.setconfig(s, b'true', b'yes') >>> u.configbool(s, b'true') True >>> u.setconfig(s, b'false', b'no') >>> u.configbool(s, b'false') False >>> u.configbool(s, b'unknown') False >>> u.configbool(s, b'unknown', True) True >>> u.setconfig(s, b'invalid', b'somevalue') >>> u.configbool(s, b'invalid') Traceback (most recent call last): ... ConfigError: foo.invalid is not a boolean ('somevalue') """ v = self._config(section, name, default, untrusted=untrusted) if v is None: return v if v is _unset: if default is _unset: return False return default if isinstance(v, bool): return v b = stringutil.parsebool(v) if b is None: raise error.ConfigError( _(b"%s.%s is not a boolean ('%s')") % (section, name, v) ) return b def configwith( self, convert, section, name, default=_unset, desc=None, untrusted=False ): """parse a configuration element with a conversion function >>> u = ui(); s = b'foo' >>> u.setconfig(s, b'float1', b'42') >>> u.configwith(float, s, b'float1') 42.0 >>> u.setconfig(s, b'float2', b'-4.25') >>> u.configwith(float, s, b'float2') -4.25 >>> u.configwith(float, s, b'unknown', 7) 7.0 >>> u.setconfig(s, b'invalid', b'somevalue') >>> u.configwith(float, s, b'invalid') Traceback (most recent call last): ... ConfigError: foo.invalid is not a valid float ('somevalue') >>> u.configwith(float, s, b'invalid', desc=b'womble') Traceback (most recent call last): ... ConfigError: foo.invalid is not a valid womble ('somevalue') """ v = self.config(section, name, default, untrusted) if v is None: return v # do not attempt to convert None try: return convert(v) except (ValueError, error.ParseError): if desc is None: desc = pycompat.sysbytes(convert.__name__) raise error.ConfigError( _(b"%s.%s is not a valid %s ('%s')") % (section, name, desc, v) ) def configint(self, section, name, default=_unset, untrusted=False): """parse a configuration element as an integer >>> u = ui(); s = b'foo' >>> u.setconfig(s, b'int1', b'42') >>> u.configint(s, b'int1') 42 >>> u.setconfig(s, b'int2', b'-42') >>> u.configint(s, b'int2') -42 >>> u.configint(s, b'unknown', 7) 7 >>> u.setconfig(s, b'invalid', b'somevalue') >>> u.configint(s, b'invalid') Traceback (most recent call last): ... ConfigError: foo.invalid is not a valid integer ('somevalue') """ return self.configwith( int, section, name, default, b'integer', untrusted ) def configbytes(self, section, name, default=_unset, untrusted=False): """parse a configuration element as a quantity in bytes Units can be specified as b (bytes), k or kb (kilobytes), m or mb (megabytes), g or gb (gigabytes). >>> u = ui(); s = b'foo' >>> u.setconfig(s, b'val1', b'42') >>> u.configbytes(s, b'val1') 42 >>> u.setconfig(s, b'val2', b'42.5 kb') >>> u.configbytes(s, b'val2') 43520 >>> u.configbytes(s, b'unknown', b'7 MB') 7340032 >>> u.setconfig(s, b'invalid', b'somevalue') >>> u.configbytes(s, b'invalid') Traceback (most recent call last): ... ConfigError: foo.invalid is not a byte quantity ('somevalue') """ value = self._config(section, name, default, untrusted) if value is _unset: if default is _unset: default = 0 value = default if not isinstance(value, bytes): return value try: return util.sizetoint(value) except error.ParseError: raise error.ConfigError( _(b"%s.%s is not a byte quantity ('%s')") % (section, name, value) ) def configlist(self, section, name, default=_unset, untrusted=False): """parse a configuration element as a list of comma/space separated strings >>> u = ui(); s = b'foo' >>> u.setconfig(s, b'list1', b'this,is "a small" ,test') >>> u.configlist(s, b'list1') ['this', 'is', 'a small', 'test'] >>> u.setconfig(s, b'list2', b'this, is "a small" , test ') >>> u.configlist(s, b'list2') ['this', 'is', 'a small', 'test'] """ # default is not always a list v = self.configwith( config.parselist, section, name, default, b'list', untrusted ) if isinstance(v, bytes): return config.parselist(v) elif v is None: return [] return v def configdate(self, section, name, default=_unset, untrusted=False): """parse a configuration element as a tuple of ints >>> u = ui(); s = b'foo' >>> u.setconfig(s, b'date', b'0 0') >>> u.configdate(s, b'date') (0, 0) """ if self.config(section, name, default, untrusted): return self.configwith( dateutil.parsedate, section, name, default, b'date', untrusted ) if default is _unset: return None return default def configdefault(self, section, name): """returns the default value of the config item""" item = self._knownconfig.get(section, {}).get(name) itemdefault = None if item is not None: if callable(item.default): itemdefault = item.default() else: itemdefault = item.default return itemdefault def hasconfig(self, section, name, untrusted=False): return self._data(untrusted).hasitem(section, name) def has_section(self, section, untrusted=False): '''tell whether section exists in config.''' return section in self._data(untrusted) def configitems(self, section, untrusted=False, ignoresub=False): items = self._data(untrusted).items(section) if ignoresub: items = [i for i in items if b':' not in i[0]] if self.debugflag and not untrusted and self._reportuntrusted: for k, v in self._ucfg.items(section): if self._tcfg.get(section, k) != v: self.debug( b"ignoring untrusted configuration option " b"%s.%s = %s\n" % (section, k, v) ) return items def walkconfig(self, untrusted=False): cfg = self._data(untrusted) for section in cfg.sections(): for name, value in self.configitems(section, untrusted): yield section, name, value def plain(self, feature=None): '''is plain mode active? Plain mode means that all configuration variables which affect the behavior and output of Mercurial should be ignored. Additionally, the output should be stable, reproducible and suitable for use in scripts or applications. The only way to trigger plain mode is by setting either the `HGPLAIN' or `HGPLAINEXCEPT' environment variables. The return value can either be - False if HGPLAIN is not set, or feature is in HGPLAINEXCEPT - False if feature is disabled by default and not included in HGPLAIN - True otherwise ''' if ( b'HGPLAIN' not in encoding.environ and b'HGPLAINEXCEPT' not in encoding.environ ): return False exceptions = ( encoding.environ.get(b'HGPLAINEXCEPT', b'').strip().split(b',') ) # TODO: add support for HGPLAIN=+feature,-feature syntax if b'+strictflags' not in encoding.environ.get(b'HGPLAIN', b'').split( b',' ): exceptions.append(b'strictflags') if feature and exceptions: return feature not in exceptions return True def username(self, acceptempty=False): """Return default username to be used in commits. Searched in this order: $HGUSER, [ui] section of hgrcs, $EMAIL and stop searching if one of these is set. If not found and acceptempty is True, returns None. If not found and ui.askusername is True, ask the user, else use ($LOGNAME or $USER or $LNAME or $USERNAME) + "@full.hostname". If no username could be found, raise an Abort error. """ user = encoding.environ.get(b"HGUSER") if user is None: user = self.config(b"ui", b"username") if user is not None: user = os.path.expandvars(user) if user is None: user = encoding.environ.get(b"EMAIL") if user is None and acceptempty: return user if user is None and self.configbool(b"ui", b"askusername"): user = self.prompt(_(b"enter a commit username:"), default=None) if user is None and not self.interactive(): try: user = b'%s@%s' % ( procutil.getuser(), encoding.strtolocal(socket.getfqdn()), ) self.warn(_(b"no username found, using '%s' instead\n") % user) except KeyError: pass if not user: raise error.Abort( _(b'no username supplied'), hint=_(b"use 'hg config --edit' " b'to set your username'), ) if b"\n" in user: raise error.Abort( _(b"username %r contains a newline\n") % pycompat.bytestr(user) ) return user def shortuser(self, user): """Return a short representation of a user name or email address.""" if not self.verbose: user = stringutil.shortuser(user) return user def expandpath(self, loc, default=None): """Return repository location relative to cwd or from [paths]""" try: p = self.paths.getpath(loc) if p: return p.rawloc except error.RepoError: pass if default: try: p = self.paths.getpath(default) if p: return p.rawloc except error.RepoError: pass return loc @util.propertycache def paths(self): return paths(self) @property def fout(self): return self._fout @fout.setter def fout(self, f): self._fout = f self._fmsgout, self._fmsgerr = _selectmsgdests(self) @property def ferr(self): return self._ferr @ferr.setter def ferr(self, f): self._ferr = f self._fmsgout, self._fmsgerr = _selectmsgdests(self) @property def fin(self): return self._fin @fin.setter def fin(self, f): self._fin = f @property def fmsg(self): """Stream dedicated for status/error messages; may be None if fout/ferr are used""" return self._fmsg @fmsg.setter def fmsg(self, f): self._fmsg = f self._fmsgout, self._fmsgerr = _selectmsgdests(self) def pushbuffer(self, error=False, subproc=False, labeled=False): """install a buffer to capture standard output of the ui object If error is True, the error output will be captured too. If subproc is True, output from subprocesses (typically hooks) will be captured too. If labeled is True, any labels associated with buffered output will be handled. By default, this has no effect on the output returned, but extensions and GUI tools may handle this argument and returned styled output. If output is being buffered so it can be captured and parsed or processed, labeled should not be set to True. """ self._buffers.append([]) self._bufferstates.append((error, subproc, labeled)) self._bufferapplylabels = labeled def popbuffer(self): '''pop the last buffer and return the buffered output''' self._bufferstates.pop() if self._bufferstates: self._bufferapplylabels = self._bufferstates[-1][2] else: self._bufferapplylabels = None return b"".join(self._buffers.pop()) def _isbuffered(self, dest): if dest is self._fout: return bool(self._buffers) if dest is self._ferr: return bool(self._bufferstates and self._bufferstates[-1][0]) return False def canwritewithoutlabels(self): '''check if write skips the label''' if self._buffers and not self._bufferapplylabels: return True return self._colormode is None def canbatchlabeledwrites(self): '''check if write calls with labels are batchable''' # Windows color printing is special, see ``write``. return self._colormode != b'win32' def write(self, *args, **opts): '''write args to output By default, this method simply writes to the buffer or stdout. Color mode can be set on the UI class to have the output decorated with color modifier before being written to stdout. The color used is controlled by an optional keyword argument, "label". This should be a string containing label names separated by space. Label names take the form of "topic.type". For example, ui.debug() issues a label of "ui.debug". Progress reports via stderr are normally cleared before writing as stdout and stderr go to the same terminal. This can be skipped with the optional keyword argument "keepprogressbar". The progress bar will continue to occupy a partial line on stderr in that case. This functionality is intended when Mercurial acts as data source in a pipe. When labeling output for a specific command, a label of "cmdname.type" is recommended. For example, status issues a label of "status.modified" for modified files. ''' dest = self._fout # inlined _write() for speed if self._buffers: label = opts.get('label', b'') if label and self._bufferapplylabels: self._buffers[-1].extend(self.label(a, label) for a in args) else: self._buffers[-1].extend(args) return # inlined _writenobuf() for speed if not opts.get('keepprogressbar', False): self._progclear() msg = b''.join(args) # opencode timeblockedsection because this is a critical path starttime = util.timer() try: if self._colormode == b'win32': # windows color printing is its own can of crab, defer to # the color module and that is it. color.win32print(self, dest.write, msg, **opts) else: if self._colormode is not None: label = opts.get('label', b'') msg = self.label(msg, label) dest.write(msg) except IOError as err: raise error.StdioError(err) finally: self._blockedtimes[b'stdio_blocked'] += ( util.timer() - starttime ) * 1000 def write_err(self, *args, **opts): self._write(self._ferr, *args, **opts) def _write(self, dest, *args, **opts): # update write() as well if you touch this code if self._isbuffered(dest): label = opts.get('label', b'') if label and self._bufferapplylabels: self._buffers[-1].extend(self.label(a, label) for a in args) else: self._buffers[-1].extend(args) else: self._writenobuf(dest, *args, **opts) def _writenobuf(self, dest, *args, **opts): # update write() as well if you touch this code if not opts.get('keepprogressbar', False): self._progclear() msg = b''.join(args) # opencode timeblockedsection because this is a critical path starttime = util.timer() try: if dest is self._ferr and not getattr(self._fout, 'closed', False): self._fout.flush() if getattr(dest, 'structured', False): # channel for machine-readable output with metadata, where # no extra colorization is necessary. dest.write(msg, **opts) elif self._colormode == b'win32': # windows color printing is its own can of crab, defer to # the color module and that is it. color.win32print(self, dest.write, msg, **opts) else: if self._colormode is not None: label = opts.get('label', b'') msg = self.label(msg, label) dest.write(msg) # stderr may be buffered under win32 when redirected to files, # including stdout. if dest is self._ferr and not getattr(dest, 'closed', False): dest.flush() except IOError as err: if dest is self._ferr and err.errno in ( errno.EPIPE, errno.EIO, errno.EBADF, ): # no way to report the error, so ignore it return raise error.StdioError(err) finally: self._blockedtimes[b'stdio_blocked'] += ( util.timer() - starttime ) * 1000 def _writemsg(self, dest, *args, **opts): timestamp = self.showtimestamp and opts.get('type') in { b'debug', b'error', b'note', b'status', b'warning', } if timestamp: args = ( b'[%s] ' % pycompat.bytestr(datetime.datetime.now().isoformat()), ) + args _writemsgwith(self._write, dest, *args, **opts) if timestamp: dest.flush() def _writemsgnobuf(self, dest, *args, **opts): _writemsgwith(self._writenobuf, dest, *args, **opts) def flush(self): # opencode timeblockedsection because this is a critical path starttime = util.timer() try: try: self._fout.flush() except IOError as err: if err.errno not in (errno.EPIPE, errno.EIO, errno.EBADF): raise error.StdioError(err) finally: try: self._ferr.flush() except IOError as err: if err.errno not in (errno.EPIPE, errno.EIO, errno.EBADF): raise error.StdioError(err) finally: self._blockedtimes[b'stdio_blocked'] += ( util.timer() - starttime ) * 1000 def _isatty(self, fh): if self.configbool(b'ui', b'nontty'): return False return procutil.isatty(fh) def protectfinout(self): """Duplicate ui streams and redirect original if they are stdio Returns (fin, fout) which point to the original ui fds, but may be copy of them. The returned streams can be considered "owned" in that print(), exec(), etc. never reach to them. """ if self._finoutredirected: # if already redirected, protectstdio() would just create another # nullfd pair, which is equivalent to returning self._fin/_fout. return self._fin, self._fout fin, fout = procutil.protectstdio(self._fin, self._fout) self._finoutredirected = (fin, fout) != (self._fin, self._fout) return fin, fout def restorefinout(self, fin, fout): """Restore ui streams from possibly duplicated (fin, fout)""" if (fin, fout) == (self._fin, self._fout): return procutil.restorestdio(self._fin, self._fout, fin, fout) # protectfinout() won't create more than one duplicated streams, # so we can just turn the redirection flag off. self._finoutredirected = False @contextlib.contextmanager def protectedfinout(self): """Run code block with protected standard streams""" fin, fout = self.protectfinout() try: yield fin, fout finally: self.restorefinout(fin, fout) def disablepager(self): self._disablepager = True def pager(self, command): """Start a pager for subsequent command output. Commands which produce a long stream of output should call this function to activate the user's preferred pagination mechanism (which may be no pager). Calling this function precludes any future use of interactive functionality, such as prompting the user or activating curses. Args: command: The full, non-aliased name of the command. That is, "log" not "history, "summary" not "summ", etc. """ if self._disablepager or self.pageractive: # how pager should do is already determined return if not command.startswith(b'internal-always-') and ( # explicit --pager=on (= 'internal-always-' prefix) should # take precedence over disabling factors below command in self.configlist(b'pager', b'ignore') or not self.configbool(b'ui', b'paginate') or not self.configbool(b'pager', b'attend-' + command, True) or encoding.environ.get(b'TERM') == b'dumb' # TODO: if we want to allow HGPLAINEXCEPT=pager, # formatted() will need some adjustment. or not self.formatted() or self.plain() or self._buffers # TODO: expose debugger-enabled on the UI object or b'--debugger' in pycompat.sysargv ): # We only want to paginate if the ui appears to be # interactive, the user didn't say HGPLAIN or # HGPLAINEXCEPT=pager, and the user didn't specify --debug. return pagercmd = self.config(b'pager', b'pager', rcutil.fallbackpager) if not pagercmd: return pagerenv = {} for name, value in rcutil.defaultpagerenv().items(): if name not in encoding.environ: pagerenv[name] = value self.debug( b'starting pager for command %s\n' % stringutil.pprint(command) ) self.flush() wasformatted = self.formatted() if util.safehasattr(signal, b"SIGPIPE"): signal.signal(signal.SIGPIPE, _catchterm) if self._runpager(pagercmd, pagerenv): self.pageractive = True # Preserve the formatted-ness of the UI. This is important # because we mess with stdout, which might confuse # auto-detection of things being formatted. self.setconfig(b'ui', b'formatted', wasformatted, b'pager') self.setconfig(b'ui', b'interactive', False, b'pager') # If pagermode differs from color.mode, reconfigure color now that # pageractive is set. cm = self._colormode if cm != self.config(b'color', b'pagermode', cm): color.setup(self) else: # If the pager can't be spawned in dispatch when --pager=on is # given, don't try again when the command runs, to avoid a duplicate # warning about a missing pager command. self.disablepager() def _runpager(self, command, env=None): """Actually start the pager and set up file descriptors. This is separate in part so that extensions (like chg) can override how a pager is invoked. """ if command == b'cat': # Save ourselves some work. return False # If the command doesn't contain any of these characters, we # assume it's a binary and exec it directly. This means for # simple pager command configurations, we can degrade # gracefully and tell the user about their broken pager. shell = any(c in command for c in b"|&;<>()$`\\\"' \t\n*?[#~=%") if pycompat.iswindows and not shell: # Window's built-in `more` cannot be invoked with shell=False, but # its `more.com` can. Hide this implementation detail from the # user so we can also get sane bad PAGER behavior. MSYS has # `more.exe`, so do a cmd.exe style resolution of the executable to # determine which one to use. fullcmd = procutil.findexe(command) if not fullcmd: self.warn( _(b"missing pager command '%s', skipping pager\n") % command ) return False command = fullcmd try: pager = subprocess.Popen( procutil.tonativestr(command), shell=shell, bufsize=-1, close_fds=procutil.closefds, stdin=subprocess.PIPE, stdout=procutil.stdout, stderr=procutil.stderr, env=procutil.tonativeenv(procutil.shellenviron(env)), ) except OSError as e: if e.errno == errno.ENOENT and not shell: self.warn( _(b"missing pager command '%s', skipping pager\n") % command ) return False raise # back up original file descriptors stdoutfd = os.dup(procutil.stdout.fileno()) stderrfd = os.dup(procutil.stderr.fileno()) os.dup2(pager.stdin.fileno(), procutil.stdout.fileno()) if self._isatty(procutil.stderr): os.dup2(pager.stdin.fileno(), procutil.stderr.fileno()) @self.atexit def killpager(): if util.safehasattr(signal, b"SIGINT"): signal.signal(signal.SIGINT, signal.SIG_IGN) # restore original fds, closing pager.stdin copies in the process os.dup2(stdoutfd, procutil.stdout.fileno()) os.dup2(stderrfd, procutil.stderr.fileno()) pager.stdin.close() pager.wait() return True @property def _exithandlers(self): return _reqexithandlers def atexit(self, func, *args, **kwargs): '''register a function to run after dispatching a request Handlers do not stay registered across request boundaries.''' self._exithandlers.append((func, args, kwargs)) return func def interface(self, feature): """what interface to use for interactive console features? The interface is controlled by the value of `ui.interface` but also by the value of feature-specific configuration. For example: ui.interface.histedit = text ui.interface.chunkselector = curses Here the features are "histedit" and "chunkselector". The configuration above means that the default interfaces for commands is curses, the interface for histedit is text and the interface for selecting chunk is crecord (the best curses interface available). Consider the following example: ui.interface = curses ui.interface.histedit = text Then histedit will use the text interface and chunkselector will use the default curses interface (crecord at the moment). """ alldefaults = frozenset([b"text", b"curses"]) featureinterfaces = { b"chunkselector": [b"text", b"curses",], b"histedit": [b"text", b"curses",], } # Feature-specific interface if feature not in featureinterfaces.keys(): # Programming error, not user error raise ValueError(b"Unknown feature requested %s" % feature) availableinterfaces = frozenset(featureinterfaces[feature]) if alldefaults > availableinterfaces: # Programming error, not user error. We need a use case to # define the right thing to do here. raise ValueError( b"Feature %s does not handle all default interfaces" % feature ) if self.plain() or encoding.environ.get(b'TERM') == b'dumb': return b"text" # Default interface for all the features defaultinterface = b"text" i = self.config(b"ui", b"interface") if i in alldefaults: defaultinterface = i choseninterface = defaultinterface f = self.config(b"ui", b"interface.%s" % feature) if f in availableinterfaces: choseninterface = f if i is not None and defaultinterface != i: if f is not None: self.warn(_(b"invalid value for ui.interface: %s\n") % (i,)) else: self.warn( _(b"invalid value for ui.interface: %s (using %s)\n") % (i, choseninterface) ) if f is not None and choseninterface != f: self.warn( _(b"invalid value for ui.interface.%s: %s (using %s)\n") % (feature, f, choseninterface) ) return choseninterface def interactive(self): '''is interactive input allowed? An interactive session is a session where input can be reasonably read from `sys.stdin'. If this function returns false, any attempt to read from stdin should fail with an error, unless a sensible default has been specified. Interactiveness is triggered by the value of the `ui.interactive' configuration variable or - if it is unset - when `sys.stdin' points to a terminal device. This function refers to input only; for output, see `ui.formatted()'. ''' i = self.configbool(b"ui", b"interactive") if i is None: # some environments replace stdin without implementing isatty # usually those are non-interactive return self._isatty(self._fin) return i def termwidth(self): '''how wide is the terminal in columns? ''' if b'COLUMNS' in encoding.environ: try: return int(encoding.environ[b'COLUMNS']) except ValueError: pass return scmutil.termsize(self)[0] def formatted(self): '''should formatted output be used? It is often desirable to format the output to suite the output medium. Examples of this are truncating long lines or colorizing messages. However, this is not often not desirable when piping output into other utilities, e.g. `grep'. Formatted output is triggered by the value of the `ui.formatted' configuration variable or - if it is unset - when `sys.stdout' points to a terminal device. Please note that `ui.formatted' should be considered an implementation detail; it is not intended for use outside Mercurial or its extensions. This function refers to output only; for input, see `ui.interactive()'. This function always returns false when in plain mode, see `ui.plain()'. ''' if self.plain(): return False i = self.configbool(b"ui", b"formatted") if i is None: # some environments replace stdout without implementing isatty # usually those are non-interactive return self._isatty(self._fout) return i def _readline(self, prompt=b' ', promptopts=None): # Replacing stdin/stdout temporarily is a hard problem on Python 3 # because they have to be text streams with *no buffering*. Instead, # we use rawinput() only if call_readline() will be invoked by # PyOS_Readline(), so no I/O will be made at Python layer. usereadline = ( self._isatty(self._fin) and self._isatty(self._fout) and procutil.isstdin(self._fin) and procutil.isstdout(self._fout) ) if usereadline: try: # magically add command line editing support, where # available import readline # force demandimport to really load the module readline.read_history_file # windows sometimes raises something other than ImportError except Exception: usereadline = False if self._colormode == b'win32' or not usereadline: if not promptopts: promptopts = {} self._writemsgnobuf( self._fmsgout, prompt, type=b'prompt', **promptopts ) self.flush() prompt = b' ' else: prompt = self.label(prompt, b'ui.prompt') + b' ' # prompt ' ' must exist; otherwise readline may delete entire line # - http://bugs.python.org/issue12833 with self.timeblockedsection(b'stdio'): if usereadline: self.flush() prompt = encoding.strfromlocal(prompt) line = encoding.strtolocal(pycompat.rawinput(prompt)) # When stdin is in binary mode on Windows, it can cause # raw_input() to emit an extra trailing carriage return if pycompat.oslinesep == b'\r\n' and line.endswith(b'\r'): line = line[:-1] else: self._fout.write(pycompat.bytestr(prompt)) self._fout.flush() line = self._fin.readline() if not line: raise EOFError line = line.rstrip(pycompat.oslinesep) return line def prompt(self, msg, default=b"y"): """Prompt user with msg, read response. If ui is not interactive, the default is returned. """ return self._prompt(msg, default=default) def _prompt(self, msg, **opts): default = opts['default'] if not self.interactive(): self._writemsg(self._fmsgout, msg, b' ', type=b'prompt', **opts) self._writemsg( self._fmsgout, default or b'', b"\n", type=b'promptecho' ) return default try: r = self._readline(prompt=msg, promptopts=opts) if not r: r = default if self.configbool(b'ui', b'promptecho'): self._writemsg(self._fmsgout, r, b"\n", type=b'promptecho') return r except EOFError: raise error.ResponseExpected() @staticmethod def extractchoices(prompt): """Extract prompt message and list of choices from specified prompt. This returns tuple "(message, choices)", and "choices" is the list of tuple "(response character, text without &)". >>> ui.extractchoices(b"awake? $$ &Yes $$ &No") ('awake? ', [('y', 'Yes'), ('n', 'No')]) >>> ui.extractchoices(b"line\\nbreak? $$ &Yes $$ &No") ('line\\nbreak? ', [('y', 'Yes'), ('n', 'No')]) >>> ui.extractchoices(b"want lots of $$money$$?$$Ye&s$$N&o") ('want lots of $$money$$?', [('s', 'Yes'), ('o', 'No')]) """ # Sadly, the prompt string may have been built with a filename # containing "$$" so let's try to find the first valid-looking # prompt to start parsing. Sadly, we also can't rely on # choices containing spaces, ASCII, or basically anything # except an ampersand followed by a character. m = re.match(br'(?s)(.+?)\$\$([^$]*&[^ $].*)', prompt) msg = m.group(1) choices = [p.strip(b' ') for p in m.group(2).split(b'$$')] def choicetuple(s): ampidx = s.index(b'&') return s[ampidx + 1 : ampidx + 2].lower(), s.replace(b'&', b'', 1) return (msg, [choicetuple(s) for s in choices]) def promptchoice(self, prompt, default=0): """Prompt user with a message, read response, and ensure it matches one of the provided choices. The prompt is formatted as follows: "would you like fries with that (Yn)? $$ &Yes $$ &No" The index of the choice is returned. Responses are case insensitive. If ui is not interactive, the default is returned. """ msg, choices = self.extractchoices(prompt) resps = [r for r, t in choices] while True: r = self._prompt(msg, default=resps[default], choices=choices) if r.lower() in resps: return resps.index(r.lower()) # TODO: shouldn't it be a warning? self._writemsg(self._fmsgout, _(b"unrecognized response\n")) def getpass(self, prompt=None, default=None): if not self.interactive(): return default try: self._writemsg( self._fmsgerr, prompt or _(b'password: '), type=b'prompt', password=True, ) # disable getpass() only if explicitly specified. it's still valid # to interact with tty even if fin is not a tty. with self.timeblockedsection(b'stdio'): if self.configbool(b'ui', b'nontty'): l = self._fin.readline() if not l: raise EOFError return l.rstrip(b'\n') else: return getpass.getpass('') except EOFError: raise error.ResponseExpected() def status(self, *msg, **opts): '''write status message to output (if ui.quiet is False) This adds an output label of "ui.status". ''' if not self.quiet: self._writemsg(self._fmsgout, type=b'status', *msg, **opts) def warn(self, *msg, **opts): '''write warning message to output (stderr) This adds an output label of "ui.warning". ''' self._writemsg(self._fmsgerr, type=b'warning', *msg, **opts) def error(self, *msg, **opts): '''write error message to output (stderr) This adds an output label of "ui.error". ''' self._writemsg(self._fmsgerr, type=b'error', *msg, **opts) def note(self, *msg, **opts): '''write note to output (if ui.verbose is True) This adds an output label of "ui.note". ''' if self.verbose: self._writemsg(self._fmsgout, type=b'note', *msg, **opts) def debug(self, *msg, **opts): '''write debug message to output (if ui.debugflag is True) This adds an output label of "ui.debug". ''' if self.debugflag: self._writemsg(self._fmsgout, type=b'debug', *msg, **opts) self.log(b'debug', b'%s', b''.join(msg)) # Aliases to defeat check-code. statusnoi18n = status notenoi18n = note warnnoi18n = warn writenoi18n = write def edit( self, text, user, extra=None, editform=None, pending=None, repopath=None, action=None, ): if action is None: self.develwarn( b'action is None but will soon be a required ' b'parameter to ui.edit()' ) extra_defaults = { b'prefix': b'editor', b'suffix': b'.txt', } if extra is not None: if extra.get(b'suffix') is not None: self.develwarn( b'extra.suffix is not None but will soon be ' b'ignored by ui.edit()' ) extra_defaults.update(extra) extra = extra_defaults if action == b'diff': suffix = b'.diff' elif action: suffix = b'.%s.hg.txt' % action else: suffix = extra[b'suffix'] rdir = None if self.configbool(b'experimental', b'editortmpinhg'): rdir = repopath (fd, name) = pycompat.mkstemp( prefix=b'hg-' + extra[b'prefix'] + b'-', suffix=suffix, dir=rdir ) try: with os.fdopen(fd, 'wb') as f: f.write(util.tonativeeol(text)) environ = {b'HGUSER': user} if b'transplant_source' in extra: environ.update( {b'HGREVISION': hex(extra[b'transplant_source'])} ) for label in (b'intermediate-source', b'source', b'rebase_source'): if label in extra: environ.update({b'HGREVISION': extra[label]}) break if editform: environ.update({b'HGEDITFORM': editform}) if pending: environ.update({b'HG_PENDING': pending}) editor = self.geteditor() self.system( b"%s \"%s\"" % (editor, name), environ=environ, onerr=error.Abort, errprefix=_(b"edit failed"), blockedtag=b'editor', ) with open(name, 'rb') as f: t = util.fromnativeeol(f.read()) finally: os.unlink(name) return t def system( self, cmd, environ=None, cwd=None, onerr=None, errprefix=None, blockedtag=None, ): '''execute shell command with appropriate output stream. command output will be redirected if fout is not stdout. if command fails and onerr is None, return status, else raise onerr object as exception. ''' if blockedtag is None: # Long cmds tend to be because of an absolute path on cmd. Keep # the tail end instead cmdsuffix = cmd.translate(None, _keepalnum)[-85:] blockedtag = b'unknown_system_' + cmdsuffix out = self._fout if any(s[1] for s in self._bufferstates): out = self with self.timeblockedsection(blockedtag): rc = self._runsystem(cmd, environ=environ, cwd=cwd, out=out) if rc and onerr: errmsg = b'%s %s' % ( procutil.shellsplit(cmd)[0], procutil.explainexit(rc), ) if errprefix: errmsg = b'%s: %s' % (errprefix, errmsg) raise onerr(errmsg) return rc def _runsystem(self, cmd, environ, cwd, out): """actually execute the given shell command (can be overridden by extensions like chg)""" return procutil.system(cmd, environ=environ, cwd=cwd, out=out) def traceback(self, exc=None, force=False): '''print exception traceback if traceback printing enabled or forced. only to call in exception handler. returns true if traceback printed.''' if self.tracebackflag or force: if exc is None: exc = sys.exc_info() cause = getattr(exc[1], 'cause', None) if cause is not None: causetb = traceback.format_tb(cause[2]) exctb = traceback.format_tb(exc[2]) exconly = traceback.format_exception_only(cause[0], cause[1]) # exclude frame where 'exc' was chained and rethrown from exctb self.write_err( b'Traceback (most recent call last):\n', encoding.strtolocal(''.join(exctb[:-1])), encoding.strtolocal(''.join(causetb)), encoding.strtolocal(''.join(exconly)), ) else: output = traceback.format_exception(exc[0], exc[1], exc[2]) self.write_err(encoding.strtolocal(''.join(output))) return self.tracebackflag or force def geteditor(self): '''return editor to use''' if pycompat.sysplatform == b'plan9': # vi is the MIPS instruction simulator on Plan 9. We # instead default to E to plumb commit messages to # avoid confusion. editor = b'E' elif pycompat.isdarwin: # vi on darwin is POSIX compatible to a fault, and that includes # exiting non-zero if you make any mistake when running an ex # command. Proof: `vi -c ':unknown' -c ':qa'; echo $?` produces 1, # while s/vi/vim/ doesn't. editor = b'vim' else: editor = b'vi' return encoding.environ.get(b"HGEDITOR") or self.config( b"ui", b"editor", editor ) @util.propertycache def _progbar(self): """setup the progbar singleton to the ui object""" if ( self.quiet or self.debugflag or self.configbool(b'progress', b'disable') or not progress.shouldprint(self) ): return None return getprogbar(self) def _progclear(self): """clear progress bar output if any. use it before any output""" if not haveprogbar(): # nothing loaded yet return if self._progbar is not None and self._progbar.printed: self._progbar.clear() def makeprogress(self, topic, unit=b"", total=None): """Create a progress helper for the specified topic""" if getattr(self._fmsgerr, 'structured', False): # channel for machine-readable output with metadata, just send # raw information # TODO: consider porting some useful information (e.g. estimated # time) from progbar. we might want to support update delay to # reduce the cost of transferring progress messages. def updatebar(topic, pos, item, unit, total): self._fmsgerr.write( None, type=b'progress', topic=topic, pos=pos, item=item, unit=unit, total=total, ) elif self._progbar is not None: updatebar = self._progbar.progress else: def updatebar(topic, pos, item, unit, total): pass return scmutil.progress(self, updatebar, topic, unit, total) def getlogger(self, name): """Returns a logger of the given name; or None if not registered""" return self._loggers.get(name) def setlogger(self, name, logger): """Install logger which can be identified later by the given name More than one loggers can be registered. Use extension or module name to uniquely identify the logger instance. """ self._loggers[name] = logger def log(self, event, msgfmt, *msgargs, **opts): '''hook for logging facility extensions event should be a readily-identifiable subsystem, which will allow filtering. msgfmt should be a newline-terminated format string to log, and *msgargs are %-formatted into it. **opts currently has no defined meanings. ''' if not self._loggers: return activeloggers = [ l for l in pycompat.itervalues(self._loggers) if l.tracked(event) ] if not activeloggers: return msg = msgfmt % msgargs opts = pycompat.byteskwargs(opts) # guard against recursion from e.g. ui.debug() registeredloggers = self._loggers self._loggers = {} try: for logger in activeloggers: logger.log(self, event, msg, opts) finally: self._loggers = registeredloggers def label(self, msg, label): '''style msg based on supplied label If some color mode is enabled, this will add the necessary control characters to apply such color. In addition, 'debug' color mode adds markup showing which label affects a piece of text. ui.write(s, 'label') is equivalent to ui.write(ui.label(s, 'label')). ''' if self._colormode is not None: return color.colorlabel(self, msg, label) return msg def develwarn(self, msg, stacklevel=1, config=None): """issue a developer warning message Use 'stacklevel' to report the offender some layers further up in the stack. """ if not self.configbool(b'devel', b'all-warnings'): if config is None or not self.configbool(b'devel', config): return msg = b'devel-warn: ' + msg stacklevel += 1 # get in develwarn if self.tracebackflag: util.debugstacktrace(msg, stacklevel, self._ferr, self._fout) self.log( b'develwarn', b'%s at:\n%s' % (msg, b''.join(util.getstackframes(stacklevel))), ) else: curframe = inspect.currentframe() calframe = inspect.getouterframes(curframe, 2) fname, lineno, fmsg = calframe[stacklevel][1:4] fname, fmsg = pycompat.sysbytes(fname), pycompat.sysbytes(fmsg) self.write_err(b'%s at: %s:%d (%s)\n' % (msg, fname, lineno, fmsg)) self.log( b'develwarn', b'%s at: %s:%d (%s)\n', msg, fname, lineno, fmsg ) # avoid cycles del curframe del calframe def deprecwarn(self, msg, version, stacklevel=2): """issue a deprecation warning - msg: message explaining what is deprecated and how to upgrade, - version: last version where the API will be supported, """ if not ( self.configbool(b'devel', b'all-warnings') or self.configbool(b'devel', b'deprec-warn') ): return msg += ( b"\n(compatibility will be dropped after Mercurial-%s," b" update your code.)" ) % version self.develwarn(msg, stacklevel=stacklevel, config=b'deprec-warn') def exportableenviron(self): """The environment variables that are safe to export, e.g. through hgweb. """ return self._exportableenviron @contextlib.contextmanager def configoverride(self, overrides, source=b""): """Context manager for temporary config overrides `overrides` must be a dict of the following structure: {(section, name) : value}""" backups = {} try: for (section, name), value in overrides.items(): backups[(section, name)] = self.backupconfig(section, name) self.setconfig(section, name, value, source) yield finally: for __, backup in backups.items(): self.restoreconfig(backup) # just restoring ui.quiet config to the previous value is not enough # as it does not update ui.quiet class member if (b'ui', b'quiet') in overrides: self.fixconfig(section=b'ui') def estimatememory(self): """Provide an estimate for the available system memory in Bytes. This can be overriden via ui.available-memory. It returns None, if no estimate can be computed. """ value = self.config(b'ui', b'available-memory') if value is not None: try: return util.sizetoint(value) except error.ParseError: raise error.ConfigError( _(b"ui.available-memory value is invalid ('%s')") % value ) return util._estimatememory() class paths(dict): """Represents a collection of paths and their configs. Data is initially derived from ui instances and the config files they have loaded. """ def __init__(self, ui): dict.__init__(self) for name, loc in ui.configitems(b'paths', ignoresub=True): # No location is the same as not existing. if not loc: continue loc, sub = ui.configsuboptions(b'paths', name) self[name] = path(ui, name, rawloc=loc, suboptions=sub) def getpath(self, name, default=None): """Return a ``path`` from a string, falling back to default. ``name`` can be a named path or locations. Locations are filesystem paths or URIs. Returns None if ``name`` is not a registered path, a URI, or a local path to a repo. """ # Only fall back to default if no path was requested. if name is None: if not default: default = () elif not isinstance(default, (tuple, list)): default = (default,) for k in default: try: return self[k] except KeyError: continue return None # Most likely empty string. # This may need to raise in the future. if not name: return None try: return self[name] except KeyError: # Try to resolve as a local path or URI. try: # We don't pass sub-options in, so no need to pass ui instance. return path(None, None, rawloc=name) except ValueError: raise error.RepoError(_(b'repository %s does not exist') % name) _pathsuboptions = {} def pathsuboption(option, attr): """Decorator used to declare a path sub-option. Arguments are the sub-option name and the attribute it should set on ``path`` instances. The decorated function will receive as arguments a ``ui`` instance, ``path`` instance, and the string value of this option from the config. The function should return the value that will be set on the ``path`` instance. This decorator can be used to perform additional verification of sub-options and to change the type of sub-options. """ def register(func): _pathsuboptions[option] = (attr, func) return func return register @pathsuboption(b'pushurl', b'pushloc') def pushurlpathoption(ui, path, value): u = util.url(value) # Actually require a URL. if not u.scheme: ui.warn(_(b'(paths.%s:pushurl not a URL; ignoring)\n') % path.name) return None # Don't support the #foo syntax in the push URL to declare branch to # push. if u.fragment: ui.warn( _( b'("#fragment" in paths.%s:pushurl not supported; ' b'ignoring)\n' ) % path.name ) u.fragment = None return bytes(u) @pathsuboption(b'pushrev', b'pushrev') def pushrevpathoption(ui, path, value): return value class path(object): """Represents an individual path and its configuration.""" def __init__(self, ui, name, rawloc=None, suboptions=None): """Construct a path from its config options. ``ui`` is the ``ui`` instance the path is coming from. ``name`` is the symbolic name of the path. ``rawloc`` is the raw location, as defined in the config. ``pushloc`` is the raw locations pushes should be made to. If ``name`` is not defined, we require that the location be a) a local filesystem path with a .hg directory or b) a URL. If not, ``ValueError`` is raised. """ if not rawloc: raise ValueError(b'rawloc must be defined') # Locations may define branches via syntax <base>#<branch>. u = util.url(rawloc) branch = None if u.fragment: branch = u.fragment u.fragment = None self.url = u self.branch = branch self.name = name self.rawloc = rawloc self.loc = b'%s' % u # When given a raw location but not a symbolic name, validate the # location is valid. if not name and not u.scheme and not self._isvalidlocalpath(self.loc): raise ValueError( b'location is not a URL or path to a local ' b'repo: %s' % rawloc ) suboptions = suboptions or {} # Now process the sub-options. If a sub-option is registered, its # attribute will always be present. The value will be None if there # was no valid sub-option. for suboption, (attr, func) in pycompat.iteritems(_pathsuboptions): if suboption not in suboptions: setattr(self, attr, None) continue value = func(ui, self, suboptions[suboption]) setattr(self, attr, value) def _isvalidlocalpath(self, path): """Returns True if the given path is a potentially valid repository. This is its own function so that extensions can change the definition of 'valid' in this case (like when pulling from a git repo into a hg one).""" try: return os.path.isdir(os.path.join(path, b'.hg')) # Python 2 may return TypeError. Python 3, ValueError. except (TypeError, ValueError): return False @property def suboptions(self): """Return sub-options and their values for this path. This is intended to be used for presentation purposes. """ d = {} for subopt, (attr, _func) in pycompat.iteritems(_pathsuboptions): value = getattr(self, attr) if value is not None: d[subopt] = value return d # we instantiate one globally shared progress bar to avoid # competing progress bars when multiple UI objects get created _progresssingleton = None def getprogbar(ui): global _progresssingleton if _progresssingleton is None: # passing 'ui' object to the singleton is fishy, # this is how the extension used to work but feel free to rework it. _progresssingleton = progress.progbar(ui) return _progresssingleton def haveprogbar(): return _progresssingleton is not None def _selectmsgdests(ui): name = ui.config(b'ui', b'message-output') if name == b'channel': if ui.fmsg: return ui.fmsg, ui.fmsg else: # fall back to ferr if channel isn't ready so that status/error # messages can be printed return ui.ferr, ui.ferr if name == b'stdio': return ui.fout, ui.ferr if name == b'stderr': return ui.ferr, ui.ferr raise error.Abort(b'invalid ui.message-output destination: %s' % name) def _writemsgwith(write, dest, *args, **opts): """Write ui message with the given ui._write*() function The specified message type is translated to 'ui.<type>' label if the dest isn't a structured channel, so that the message will be colorized. """ # TODO: maybe change 'type' to a mandatory option if 'type' in opts and not getattr(dest, 'structured', False): opts['label'] = opts.get('label', b'') + b' ui.%s' % opts.pop('type') write(dest, *args, **opts)