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# -*- coding: utf-8 -*-
# Gedit External Tools plugin
# Copyright (C) 2005-2006 Steve Frécinaux <steve@istique.net>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
__all__ = ('Capture', )
import os
import sys
import signal
import locale
import subprocess
import fcntl
from gi.repository import GLib, GObject
try:
import gettext
gettext.bindtextdomain('gedit')
gettext.textdomain('gedit')
_ = gettext.gettext
except:
_ = lambda s: s
class Capture(GObject.Object):
CAPTURE_STDOUT = 0x01
CAPTURE_STDERR = 0x02
CAPTURE_BOTH = 0x03
CAPTURE_NEEDS_SHELL = 0x04
WRITE_BUFFER_SIZE = 0x4000
__gsignals__ = {
'stdout-line': (GObject.SignalFlags.RUN_LAST, GObject.TYPE_NONE, (GObject.TYPE_STRING,)),
'stderr-line': (GObject.SignalFlags.RUN_LAST, GObject.TYPE_NONE, (GObject.TYPE_STRING,)),
'begin-execute': (GObject.SignalFlags.RUN_LAST, GObject.TYPE_NONE, tuple()),
'end-execute': (GObject.SignalFlags.RUN_LAST, GObject.TYPE_NONE, (GObject.TYPE_INT,))
}
def __init__(self, command, cwd=None, env={}):
GObject.GObject.__init__(self)
self.pipe = None
self.env = env
self.cwd = cwd
self.flags = self.CAPTURE_BOTH | self.CAPTURE_NEEDS_SHELL
self.command = command
self.input_text = None
def set_env(self, **values):
self.env.update(**values)
def set_command(self, command):
self.command = command
def set_flags(self, flags):
self.flags = flags
def set_input(self, text):
self.input_text = text.encode("UTF-8") if text else None
def set_cwd(self, cwd):
self.cwd = cwd
def execute(self):
if self.command is None:
return
# Initialize pipe
popen_args = {
'cwd': self.cwd,
'shell': self.flags & self.CAPTURE_NEEDS_SHELL,
'env': self.env
}
if self.input_text is not None:
popen_args['stdin'] = subprocess.PIPE
if self.flags & self.CAPTURE_STDOUT:
popen_args['stdout'] = subprocess.PIPE
if self.flags & self.CAPTURE_STDERR:
popen_args['stderr'] = subprocess.PIPE
self.tried_killing = False
self.in_channel = None
self.out_channel = None
self.err_channel = None
self.in_channel_id = 0
self.out_channel_id = 0
self.err_channel_id = 0
try:
self.pipe = subprocess.Popen(self.command, **popen_args)
except OSError as e:
self.pipe = None
self.emit('stderr-line', _('Could not execute command: %s') % (e, ))
return
self.emit('begin-execute')
if self.input_text is not None:
self.in_channel, self.in_channel_id = self.add_in_watch(self.pipe.stdin.fileno(),
self.on_in_writable)
if self.flags & self.CAPTURE_STDOUT:
self.out_channel, self.out_channel_id = self.add_out_watch(self.pipe.stdout.fileno(),
self.on_output)
if self.flags & self.CAPTURE_STDERR:
self.err_channel, self.err_channel_id = self.add_out_watch(self.pipe.stderr.fileno(),
self.on_err_output)
# Wait for the process to complete
GLib.child_watch_add(GLib.PRIORITY_DEFAULT,
self.pipe.pid,
self.on_child_end)
def add_in_watch(self, fd, io_func):
channel = GLib.IOChannel.unix_new(fd)
channel.set_flags(channel.get_flags() | GLib.IOFlags.NONBLOCK)
channel.set_encoding(None)
channel_id = GLib.io_add_watch(channel,
GLib.PRIORITY_DEFAULT,
GLib.IOCondition.OUT | GLib.IOCondition.HUP | GLib.IOCondition.ERR,
io_func)
return (channel, channel_id)
def add_out_watch(self, fd, io_func):
channel = GLib.IOChannel.unix_new(fd)
channel.set_flags(channel.get_flags() | GLib.IOFlags.NONBLOCK)
channel_id = GLib.io_add_watch(channel,
GLib.PRIORITY_DEFAULT,
GLib.IOCondition.IN | GLib.IOCondition.HUP | GLib.IOCondition.ERR,
io_func)
return (channel, channel_id)
def write_chunk(self, dest, condition):
if condition & (GObject.IO_OUT):
status = GLib.IOStatus.NORMAL
l = len(self.input_text)
while status == GLib.IOStatus.NORMAL:
if l == 0:
return False
m = min(l, self.WRITE_BUFFER_SIZE)
try:
(status, length) = dest.write_chars(self.input_text, m)
self.input_text = self.input_text[length:]
l -= length
except Exception as e:
return False
if status != GLib.IOStatus.AGAIN:
return False
if condition & ~(GObject.IO_OUT):
return False
return True
def on_in_writable(self, dest, condition):
ret = self.write_chunk(dest, condition)
if ret is False:
self.input_text = None
try:
self.in_channel.shutdown(True)
except:
pass
self.in_channel = None
self.in_channel_id = 0
self.cleanup_pipe()
return ret
def handle_source(self, source, condition, signalname):
if condition & (GObject.IO_IN | GObject.IO_PRI):
status = GLib.IOStatus.NORMAL
while status == GLib.IOStatus.NORMAL:
try:
(status, buf, length, terminator_pos) = source.read_line()
except Exception as e:
return False
if buf:
self.emit(signalname, buf)
if status != GLib.IOStatus.AGAIN:
return False
if condition & ~(GObject.IO_IN | GObject.IO_PRI):
return False
return True
def on_output(self, source, condition):
ret = self.handle_source(source, condition, 'stdout-line')
if ret is False and self.out_channel:
try:
self.out_channel.shutdown(True)
except:
pass
self.out_channel = None
self.out_channel_id = 0
self.cleanup_pipe()
return ret
def on_err_output(self, source, condition):
ret = self.handle_source(source, condition, 'stderr-line')
if ret is False and self.err_channel:
try:
self.err_channel.shutdown(True)
except:
pass
self.err_channel = None
self.err_channel_id = 0
self.cleanup_pipe()
return ret
def cleanup_pipe(self):
if self.in_channel is None and self.out_channel is None and self.err_channel is None:
self.pipe = None
def stop(self, error_code=-1):
if self.in_channel_id:
GLib.source_remove(self.in_channel_id)
self.in_channel.shutdown(True)
self.in_channel = None
self.in_channel_id = 0
if self.out_channel_id:
GLib.source_remove(self.out_channel_id)
self.out_channel.shutdown(True)
self.out_channel = None
self.out_channel_id = 0
if self.err_channel_id:
GLib.source_remove(self.err_channel_id)
self.err_channel.shutdown(True)
self.err_channel = None
self.err_channel = 0
if self.pipe is not None:
if not self.tried_killing:
os.kill(self.pipe.pid, signal.SIGTERM)
self.tried_killing = True
else:
os.kill(self.pipe.pid, signal.SIGKILL)
self.pipe = None
def emit_end_execute(self, error_code):
self.emit('end-execute', error_code)
return False
def on_child_end(self, pid, error_code):
# In an idle, so it is emitted after all the std*-line signals
# have been intercepted
GLib.idle_add(self.emit_end_execute, error_code)
# ex:ts=4:et:
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