Mercurial > hg
diff mercurial/posix.py @ 7890:e710f0f592b2
util: split out posix, windows, and win32 modules
author | Matt Mackall <mpm@selenic.com> |
---|---|
date | Thu, 26 Mar 2009 13:54:44 -0500 |
parents | |
children | c0dc1f15b30d |
line wrap: on
line diff
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mercurial/posix.py Thu Mar 26 13:54:44 2009 -0500 @@ -0,0 +1,222 @@ +""" +posix.py - Posix utility function implementations for Mercurial + + Copyright 2005-2009 Matt Mackall <mpm@selenic.com> and others + +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 os, sys, osutil, errno, stat, getpass + +posixfile = file +nulldev = '/dev/null' +normpath = os.path.normpath +samestat = os.path.samestat + +umask = os.umask(0) +os.umask(umask) + +def openhardlinks(): + '''return true if it is safe to hold open file handles to hardlinks''' + return True + +def rcfiles(path): + rcs = [os.path.join(path, 'hgrc')] + rcdir = os.path.join(path, 'hgrc.d') + try: + rcs.extend([os.path.join(rcdir, f) + for f, kind in osutil.listdir(rcdir) + if f.endswith(".rc")]) + except OSError: + pass + return rcs + +def system_rcpath(): + path = [] + # old mod_python does not set sys.argv + if len(getattr(sys, 'argv', [])) > 0: + path.extend(rcfiles(os.path.dirname(sys.argv[0]) + + '/../etc/mercurial')) + path.extend(rcfiles('/etc/mercurial')) + return path + +def user_rcpath(): + return [os.path.expanduser('~/.hgrc')] + +def parse_patch_output(output_line): + """parses the output produced by patch and returns the file name""" + pf = output_line[14:] + if os.sys.platform == 'OpenVMS': + if pf[0] == '`': + pf = pf[1:-1] # Remove the quotes + else: + if pf.startswith("'") and pf.endswith("'") and " " in pf: + pf = pf[1:-1] # Remove the quotes + return pf + +def sshargs(sshcmd, host, user, port): + '''Build argument list for ssh''' + args = user and ("%s@%s" % (user, host)) or host + return port and ("%s -p %s" % (args, port)) or args + +def is_exec(f): + """check whether a file is executable""" + return (os.lstat(f).st_mode & 0100 != 0) + +def set_flags(f, l, x): + s = os.lstat(f).st_mode + if l: + if not stat.S_ISLNK(s): + # switch file to link + data = file(f).read() + os.unlink(f) + try: + os.symlink(data, f) + except: + # failed to make a link, rewrite file + file(f, "w").write(data) + # no chmod needed at this point + return + if stat.S_ISLNK(s): + # switch link to file + data = os.readlink(f) + os.unlink(f) + file(f, "w").write(data) + s = 0666 & ~umask # avoid restatting for chmod + + sx = s & 0100 + if x and not sx: + # Turn on +x for every +r bit when making a file executable + # and obey umask. + os.chmod(f, s | (s & 0444) >> 2 & ~umask) + elif not x and sx: + # Turn off all +x bits + os.chmod(f, s & 0666) + +def set_binary(fd): + pass + +def pconvert(path): + return path + +def localpath(path): + return path + +def shellquote(s): + if os.sys.platform == 'OpenVMS': + return '"%s"' % s + else: + return "'%s'" % s.replace("'", "'\\''") + +def quotecommand(cmd): + return cmd + +def popen(command, mode='r'): + return os.popen(command, mode) + +def testpid(pid): + '''return False if pid dead, True if running or not sure''' + if os.sys.platform == 'OpenVMS': + return True + try: + os.kill(pid, 0) + return True + except OSError, inst: + return inst.errno != errno.ESRCH + +def explain_exit(code): + """return a 2-tuple (desc, code) describing a process's status""" + if os.WIFEXITED(code): + val = os.WEXITSTATUS(code) + return _("exited with status %d") % val, val + elif os.WIFSIGNALED(code): + val = os.WTERMSIG(code) + return _("killed by signal %d") % val, val + elif os.WIFSTOPPED(code): + val = os.WSTOPSIG(code) + return _("stopped by signal %d") % val, val + raise ValueError(_("invalid exit code")) + +def isowner(fp, st=None): + """Return True if the file object f belongs to the current user. + + The return value of a util.fstat(f) may be passed as the st argument. + """ + if st is None: + st = fstat(fp) + return st.st_uid == os.getuid() + +def find_exe(command): + '''Find executable for command searching like which does. + If command is a basename then PATH is searched for command. + PATH isn't searched if command is an absolute or relative path. + If command isn't found None is returned.''' + if sys.platform == 'OpenVMS': + return command + + def findexisting(executable): + 'Will return executable if existing file' + if os.path.exists(executable): + return executable + return None + + if os.sep in command: + return findexisting(command) + + for path in os.environ.get('PATH', '').split(os.pathsep): + executable = findexisting(os.path.join(path, command)) + if executable is not None: + return executable + return None + +def set_signal_handler(): + pass + +def statfiles(files): + 'Stat each file in files and yield stat or None if file does not exist.' + lstat = os.lstat + for nf in files: + try: + st = lstat(nf) + except OSError, err: + if err.errno not in (errno.ENOENT, errno.ENOTDIR): + raise + st = None + yield st + +def getuser(): + '''return name of current user''' + return getpass.getuser() + +def expand_glob(pats): + '''On Windows, expand the implicit globs in a list of patterns''' + return list(pats) + +def username(uid=None): + """Return the name of the user with the given uid. + + If uid is None, return the name of the current user.""" + + if uid is None: + uid = os.getuid() + try: + return pwd.getpwuid(uid)[0] + except KeyError: + return str(uid) + +def groupname(gid=None): + """Return the name of the group with the given gid. + + If gid is None, return the name of the current group.""" + + if gid is None: + gid = os.getgid() + try: + return grp.getgrgid(gid)[0] + except KeyError: + return str(gid) + +