| # -*- coding: utf-8 -*- |
| |
| __copyright__ = """ |
| Copyright (C) 2007, Karl Hasselström <kha@treskal.com> |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License version 2 as |
| published by the Free Software Foundation. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| """ |
| |
| import datetime, os, subprocess |
| |
| from stgit.exception import * |
| from stgit.out import * |
| |
| class RunException(StgException): |
| """Thrown when something bad happened when we tried to run the |
| subprocess.""" |
| pass |
| |
| _all_log_modes = ['debug', 'profile'] |
| _log_mode = os.environ.get('STGIT_SUBPROCESS_LOG', '') |
| if _log_mode and not _log_mode in _all_log_modes: |
| out.warn(('Unknown log mode "%s" specified in $STGIT_SUBPROCESS_LOG.' |
| % _log_mode), |
| 'Valid values are: %s' % ', '.join(_all_log_modes)) |
| |
| class Run: |
| exc = RunException |
| def __init__(self, *cmd): |
| self.__cmd = list(cmd) |
| for c in cmd: |
| if type(c) != str: |
| raise Exception, 'Bad command: %r' % (cmd,) |
| self.__good_retvals = [0] |
| self.__env = None |
| self.__indata = None |
| self.__discard_stderr = False |
| def __log_start(self): |
| if _log_mode == 'debug': |
| out.start('Running subprocess %s' % self.__cmd) |
| elif _log_mode == 'profile': |
| out.start('Running subprocess %s' % self.__cmd[0]) |
| self.__starttime = datetime.datetime.now() |
| def __log_end(self, retcode): |
| if _log_mode == 'debug': |
| out.done('return code: %d' % retcode) |
| elif _log_mode == 'profile': |
| duration = datetime.datetime.now() - self.__starttime |
| out.done('%1.3f s' % (duration.microseconds/1e6 + duration.seconds)) |
| def __check_exitcode(self): |
| if self.__good_retvals == None: |
| return |
| if self.exitcode not in self.__good_retvals: |
| raise self.exc('%s failed with code %d' |
| % (self.__cmd[0], self.exitcode)) |
| def __run_io(self): |
| """Run with captured IO.""" |
| self.__log_start() |
| try: |
| p = subprocess.Popen(self.__cmd, env = self.__env, |
| stdin = subprocess.PIPE, |
| stdout = subprocess.PIPE, |
| stderr = subprocess.PIPE) |
| outdata, errdata = p.communicate(self.__indata) |
| self.exitcode = p.returncode |
| except OSError, e: |
| raise self.exc('%s failed: %s' % (self.__cmd[0], e)) |
| if errdata and not self.__discard_stderr: |
| out.err_raw(errdata) |
| self.__log_end(self.exitcode) |
| self.__check_exitcode() |
| return outdata |
| def __run_noio(self): |
| """Run without captured IO.""" |
| assert self.__indata == None |
| self.__log_start() |
| try: |
| p = subprocess.Popen(self.__cmd, env = self.__env) |
| self.exitcode = p.wait() |
| except OSError, e: |
| raise self.exc('%s failed: %s' % (self.__cmd[0], e)) |
| self.__log_end(self.exitcode) |
| self.__check_exitcode() |
| def returns(self, retvals): |
| self.__good_retvals = retvals |
| return self |
| def discard_exitcode(self): |
| self.__good_retvals = None |
| return self |
| def discard_stderr(self, discard = True): |
| self.__discard_stderr = discard |
| return self |
| def env(self, env): |
| self.__env = dict(os.environ) |
| self.__env.update(env) |
| return self |
| def raw_input(self, indata): |
| self.__indata = indata |
| return self |
| def input_lines(self, lines): |
| self.__indata = ''.join(['%s\n' % line for line in lines]) |
| return self |
| def no_output(self): |
| outdata = self.__run_io() |
| if outdata: |
| raise self.exc, '%s produced output' % self.__cmd[0] |
| def discard_output(self): |
| self.__run_io() |
| def raw_output(self): |
| return self.__run_io() |
| def output_lines(self): |
| outdata = self.__run_io() |
| if outdata.endswith('\n'): |
| outdata = outdata[:-1] |
| if outdata: |
| return outdata.split('\n') |
| else: |
| return [] |
| def output_one_line(self): |
| outlines = self.output_lines() |
| if len(outlines) == 1: |
| return outlines[0] |
| else: |
| raise self.exc('%s produced %d lines, expected 1' |
| % (self.__cmd[0], len(outlines))) |
| def run(self): |
| """Just run, with no IO redirection.""" |
| self.__run_noio() |
| def xargs(self, xargs): |
| """Just run, with no IO redirection. The extra arguments are |
| appended to the command line a few at a time; the command is |
| run as many times as needed to consume them all.""" |
| step = 100 |
| basecmd = self.__cmd |
| for i in xrange(0, len(xargs), step): |
| self.__cmd = basecmd + xargs[i:i+step] |
| self.__run_noio() |
| self.__cmd = basecmd |