add hg and python

1 files changed, 381 insertions, 0 deletions

diff --git a/sys/src/cmd/hg/mercurial/ui.py b/sys/src/cmd/hg/mercurial/ui.py
new file mode 100644
index 000000000..bd122f74a
--- /dev/null
+++ b/sys/src/cmd/hg/mercurial/ui.py
@@ -0,0 +1,381 @@
+# 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, incorporated herein by reference.
+
+from i18n import _
+import errno, getpass, os, socket, sys, tempfile, traceback
+import config, util, error
+
+_booleans = {'1': True, 'yes': True, 'true': True, 'on': True,
+             '0': False, 'no': False, 'false': False, 'off': False}
+
+class ui(object):
+    def __init__(self, src=None):
+        self._buffers = []
+        self.quiet = self.verbose = self.debugflag = self._traceback = False
+        self._reportuntrusted = True
+        self._ocfg = config.config() # overlay
+        self._tcfg = config.config() # trusted
+        self._ucfg = config.config() # untrusted
+        self._trustusers = set()
+        self._trustgroups = set()
+
+        if src:
+            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.fixconfig()
+        else:
+            # we always trust global config files
+            for f in util.rcpath():
+                self.readconfig(f, trust=True)
+
+    def copy(self):
+        return self.__class__(self)
+
+    def _is_trusted(self, fp, f):
+        st = util.fstat(fp)
+        if util.isowner(st):
+            return True
+
+        tusers, tgroups = self._trustusers, self._trustgroups
+        if '*' in tusers or '*' 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(_('Not trusting file %s from untrusted '
+                        'user %s, group %s\n') % (f, user, group))
+        return False
+
+    def readconfig(self, filename, root=None, trust=False,
+                   sections=None, remap=None):
+        try:
+            fp = open(filename)
+        except IOError:
+            if not sections: # ignore unless we were looking for something
+                return
+            raise
+
+        cfg = config.config()
+        trusted = sections or trust or self._is_trusted(fp, filename)
+
+        try:
+            cfg.read(filename, fp, sections=sections, remap=remap)
+        except error.ConfigError, inst:
+            if trusted:
+                raise
+            self.warn(_("Ignored: %s\n") % str(inst))
+
+        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('~')
+        self.fixconfig(root=root)
+
+    def fixconfig(self, root=None):
+        # translate paths relative to root (or home) into absolute paths
+        root = root or os.getcwd()
+        for c in self._tcfg, self._ucfg, self._ocfg:
+            for n, p in c.items('paths'):
+                if p and "://" not in p and not os.path.isabs(p):
+                    c.set("paths", n, os.path.normpath(os.path.join(root, p)))
+
+        # update ui options
+        self.debugflag = self.configbool('ui', 'debug')
+        self.verbose = self.debugflag or self.configbool('ui', 'verbose')
+        self.quiet = not self.debugflag and self.configbool('ui', 'quiet')
+        if self.verbose and self.quiet:
+            self.quiet = self.verbose = False
+        self._reportuntrusted = self.configbool("ui", "report_untrusted", True)
+        self._traceback = self.configbool('ui', 'traceback', False)
+
+        # update trust information
+        self._trustusers.update(self.configlist('trusted', 'users'))
+        self._trustgroups.update(self.configlist('trusted', 'groups'))
+
+    def setconfig(self, section, name, value):
+        for cfg in (self._ocfg, self._tcfg, self._ucfg):
+            cfg.set(section, name, value)
+        self.fixconfig()
+
+    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) or 'none'
+
+    def config(self, section, name, default=None, untrusted=False):
+        value = self._data(untrusted).get(section, name, default)
+        if self.debugflag and not untrusted and self._reportuntrusted:
+            uvalue = self._ucfg.get(section, name)
+            if uvalue is not None and uvalue != value:
+                self.debug(_("ignoring untrusted configuration option "
+                             "%s.%s = %s\n") % (section, name, uvalue))
+        return value
+
+    def configbool(self, section, name, default=False, untrusted=False):
+        v = self.config(section, name, None, untrusted)
+        if v is None:
+            return default
+        if v.lower() not in _booleans:
+            raise error.ConfigError(_("%s.%s not a boolean ('%s')")
+                                    % (section, name, v))
+        return _booleans[v.lower()]
+
+    def configlist(self, section, name, default=None, untrusted=False):
+        """Return a list of comma/space separated strings"""
+        result = self.config(section, name, untrusted=untrusted)
+        if result is None:
+            result = default or []
+        if isinstance(result, basestring):
+            result = result.replace(",", " ").split()
+        return result
+
+    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):
+        items = self._data(untrusted).items(section)
+        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(_("ignoring untrusted configuration option "
+                                "%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, str(value).replace('\n', '\\n')
+
+    def username(self):
+        """Return default username to be used in commits.
+
+        Searched in this order: $HGUSER, [ui] section of hgrcs, $EMAIL
+        and stop searching if one of these is set.
+        If not found and ui.askusername is True, ask the user, else use
+        ($LOGNAME or $USER or $LNAME or $USERNAME) + "@full.hostname".
+        """
+        user = os.environ.get("HGUSER")
+        if user is None:
+            user = self.config("ui", "username")
+        if user is None:
+            user = os.environ.get("EMAIL")
+        if user is None and self.configbool("ui", "askusername"):
+            user = self.prompt(_("enter a commit username:"), default=None)
+        if user is None:
+            try:
+                user = '%s@%s' % (util.getuser(), socket.getfqdn())
+                self.warn(_("No username found, using '%s' instead\n") % user)
+            except KeyError:
+                pass
+        if not user:
+            raise util.Abort(_("Please specify a username."))
+        if "\n" in user:
+            raise util.Abort(_("username %s contains a newline\n") % repr(user))
+        return user
+
+    def shortuser(self, user):
+        """Return a short representation of a user name or email address."""
+        if not self.verbose: user = util.shortuser(user)
+        return user
+
+    def _path(self, loc):
+        p = self.config('paths', loc)
+        if p and '%%' in p:
+            self.warn('(deprecated \'%%\' in path %s=%s from %s)\n' %
+                    (loc, p, self.configsource('paths', loc)))
+            p = p.replace('%%', '%')
+        return p
+
+    def expandpath(self, loc, default=None):
+        """Return repository location relative to cwd or from [paths]"""
+        if "://" in loc or os.path.isdir(os.path.join(loc, '.hg')):
+            return loc
+
+        path = self._path(loc)
+        if not path and default is not None:
+            path = self._path(default)
+        return path or loc
+
+    def pushbuffer(self):
+        self._buffers.append([])
+
+    def popbuffer(self):
+        return "".join(self._buffers.pop())
+
+    def write(self, *args):
+        if self._buffers:
+            self._buffers[-1].extend([str(a) for a in args])
+        else:
+            for a in args:
+                sys.stdout.write(str(a))
+
+    def write_err(self, *args):
+        try:
+            if not sys.stdout.closed: sys.stdout.flush()
+            for a in args:
+                sys.stderr.write(str(a))
+            # stderr may be buffered under win32 when redirected to files,
+            # including stdout.
+            if not sys.stderr.closed: sys.stderr.flush()
+        except IOError, inst:
+            if inst.errno != errno.EPIPE:
+                raise
+
+    def flush(self):
+        try: sys.stdout.flush()
+        except: pass
+        try: sys.stderr.flush()
+        except: pass
+
+    def interactive(self):
+        i = self.configbool("ui", "interactive", None)
+        if i is None:
+            return sys.stdin.isatty()
+        return i
+
+    def _readline(self, prompt=''):
+        if sys.stdin.isatty():
+            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:
+                pass
+        line = raw_input(prompt)
+        # When stdin is in binary mode on Windows, it can cause
+        # raw_input() to emit an extra trailing carriage return
+        if os.linesep == '\r\n' and line and line[-1] == '\r':
+            line = line[:-1]
+        return line
+
+    def prompt(self, msg, default="y"):
+        """Prompt user with msg, read response.
+        If ui is not interactive, the default is returned.
+        """
+        if not self.interactive():
+            self.write(msg, ' ', default, "\n")
+            return default
+        try:
+            r = self._readline(msg + ' ')
+            if not r:
+                return default
+            return r
+        except EOFError:
+            raise util.Abort(_('response expected'))
+
+    def promptchoice(self, msg, choices, default=0):
+        """Prompt user with msg, read response, and ensure it matches
+        one of the provided choices. The index of the choice is returned.
+        choices is a sequence of acceptable responses with the format:
+        ('&None', 'E&xec', 'Sym&link') Responses are case insensitive.
+        If ui is not interactive, the default is returned.
+        """
+        resps = [s[s.index('&')+1].lower() for s in choices]
+        while True:
+            r = self.prompt(msg, resps[default])
+            if r.lower() in resps:
+                return resps.index(r.lower())
+            self.write(_("unrecognized response\n"))
+
+
+    def getpass(self, prompt=None, default=None):
+        if not self.interactive(): return default
+        try:
+            return getpass.getpass(prompt or _('password: '))
+        except EOFError:
+            raise util.Abort(_('response expected'))
+    def status(self, *msg):
+        if not self.quiet: self.write(*msg)
+    def warn(self, *msg):
+        self.write_err(*msg)
+    def note(self, *msg):
+        if self.verbose: self.write(*msg)
+    def debug(self, *msg):
+        if self.debugflag: self.write(*msg)
+    def edit(self, text, user):
+        (fd, name) = tempfile.mkstemp(prefix="hg-editor-", suffix=".txt",
+                                      text=True)
+        try:
+            f = os.fdopen(fd, "w")
+            f.write(text)
+            f.close()
+
+            editor = self.geteditor()
+
+            util.system("%s \"%s\"" % (editor, name),
+                        environ={'HGUSER': user},
+                        onerr=util.Abort, errprefix=_("edit failed"))
+
+            f = open(name)
+            t = f.read()
+            f.close()
+        finally:
+            os.unlink(name)
+
+        return t
+
+    def traceback(self):
+        '''print exception traceback if traceback printing enabled.
+        only to call in exception handler. returns true if traceback
+        printed.'''
+        if self._traceback:
+            traceback.print_exc()
+        return self._traceback
+
+    def geteditor(self):
+        '''return editor to use'''
+        return (os.environ.get("HGEDITOR") or
+                self.config("ui", "editor") or
+                os.environ.get("VISUAL") or
+                os.environ.get("EDITOR", "vi"))
+
+    def progress(self, topic, pos, item="", unit="", total=None):
+        '''show a progress message
+
+        With stock hg, this is simply a debug message that is hidden
+        by default, but with extensions or GUI tools it may be
+        visible. 'topic' is the current operation, 'item' is a
+        non-numeric marker of the current position (ie the currently
+        in-process file), 'pos' is the current numeric position (ie
+        revision, bytes, etc.), units is a corresponding unit label,
+        and total is the highest expected pos.
+
+        Multiple nested topics may be active at a time. All topics
+        should be marked closed by setting pos to None at termination.
+        '''
+
+        if pos == None or not self.debugflag:
+            return
+
+        if units:
+            units = ' ' + units
+        if item:
+            item = ' ' + item
+
+        if total:
+            pct = 100.0 * pos / total
+            ui.debug('%s:%s %s/%s%s (%4.2g%%)\n'
+                     % (topic, item, pos, total, units, pct))
+        else:
+            ui.debug('%s:%s %s%s\n' % (topic, item, pos, units))