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import os, json, hashlib, shlex, sys
import time, pty
from subprocess import Popen, STDOUT, PIPE, check_output
from select import epoll, EPOLLIN, EPOLLHUP
from .exceptions import *
def log(*args, **kwargs):
string = ' '.join([str(x) for x in args])
if supports_color():
kwargs = {'bg' : 'black', 'fg': 'white', **kwargs}
string = stylize_output(string, **kwargs)
print(string)
def gen_uid(entropy_length=256):
return hashlib.sha512(os.urandom(entropy_length)).hexdigest()
def multisplit(s, splitters):
s = [s,]
for key in splitters:
ns = []
for obj in s:
x = obj.split(key)
for index, part in enumerate(x):
if len(part):
ns.append(part)
if index < len(x)-1:
ns.append(key)
s = ns
return s
# Heavily influenced by: https://github.com/django/django/blob/ae8338daf34fd746771e0678081999b656177bae/django/utils/termcolors.py#L13
# Color options here: https://askubuntu.com/questions/528928/how-to-do-underline-bold-italic-strikethrough-color-background-and-size-i
def stylize_output(text :str, *opts, **kwargs):
opt_dict = {'bold': '1', 'italic' : '3', 'underscore': '4', 'blink': '5', 'reverse': '7', 'conceal': '8'}
color_names = ('black', 'red', 'green', 'yellow', 'blue', 'magenta', 'cyan', 'white')
foreground = {color_names[x]: '3%s' % x for x in range(8)}
background = {color_names[x]: '4%s' % x for x in range(8)}
RESET = '0'
code_list = []
if text == '' and len(opts) == 1 and opts[0] == 'reset':
return '\x1b[%sm' % RESET
for k, v in kwargs.items():
if k == 'fg':
code_list.append(foreground[v])
elif k == 'bg':
code_list.append(background[v])
for o in opts:
if o in opt_dict:
code_list.append(opt_dict[o])
if 'noreset' not in opts:
text = '%s\x1b[%sm' % (text or '', RESET)
return '%s%s' % (('\x1b[%sm' % ';'.join(code_list)), text or '')
# Found first reference here: https://stackoverflow.com/questions/7445658/how-to-detect-if-the-console-does-support-ansi-escape-codes-in-python
# And re-used this: https://github.com/django/django/blob/master/django/core/management/color.py#L12
def supports_color():
"""
Return True if the running system's terminal supports color,
and False otherwise.
"""
supported_platform = sys.platform != 'win32' or 'ANSICON' in os.environ
# isatty is not always implemented, #6223.
is_a_tty = hasattr(sys.stdout, 'isatty') and sys.stdout.isatty()
return supported_platform and is_a_tty
class sys_command():#Thread):
"""
Stolen from archinstall_gui
"""
def __init__(self, cmd, callback=None, start_callback=None, *args, **kwargs):
if not 'worker_id' in kwargs: kwargs['worker_id'] = gen_uid()
if not 'emulate' in kwargs: kwargs['emulate'] = False
if not 'surpress_errors' in kwargs: kwargs['surpress_errors'] = False
if kwargs['emulate']:
log(f"Starting command '{cmd}' in emulation mode.")
self.raw_cmd = cmd
try:
self.cmd = shlex.split(cmd)
except Exception as e:
raise ValueError(f'Incorrect string to split: {cmd}\n{e}')
self.args = args
self.kwargs = kwargs
if not 'worker' in self.kwargs: self.kwargs['worker'] = None
self.callback = callback
self.pid = None
self.exit_code = None
self.started = time.time()
self.ended = None
self.worker_id = kwargs['worker_id']
self.trace_log = b''
self.status = 'starting'
user_catalogue = os.path.expanduser('~')
self.cwd = f"{user_catalogue}/.cache/archinstall/workers/{kwargs['worker_id']}/"
self.exec_dir = f'{self.cwd}/{os.path.basename(self.cmd[0])}_workingdir'
if not self.cmd[0][0] == '/':
#log('Worker command is not executed with absolute path, trying to find: {}'.format(self.cmd[0]), origin='spawn', level=5)
o = check_output(['/usr/bin/which', self.cmd[0]])
#log('This is the binary {} for {}'.format(o.decode('UTF-8'), self.cmd[0]), origin='spawn', level=5)
self.cmd[0] = o.decode('UTF-8').strip()
if not os.path.isdir(self.exec_dir):
os.makedirs(self.exec_dir)
if start_callback: start_callback(self, *args, **kwargs)
self.run()
def __iter__(self, *args, **kwargs):
for line in self.trace_log.split(b'\n'):
yield line
def __repr__(self, *args, **kwargs):
return f"{self.cmd, self.trace_log}"
def decode(self, fmt='UTF-8'):
return self.trace_log.decode(fmt)
def dump(self):
return {
'status' : self.status,
'worker_id' : self.worker_id,
'worker_result' : self.trace_log.decode('UTF-8'),
'started' : self.started,
'ended' : self.ended,
'started_pprint' : '{}-{}-{} {}:{}:{}'.format(*time.localtime(self.started)),
'ended_pprint' : '{}-{}-{} {}:{}:{}'.format(*time.localtime(self.ended)) if self.ended else None,
'exit_code' : self.exit_code
}
def run(self):
self.status = 'running'
old_dir = os.getcwd()
os.chdir(self.exec_dir)
self.pid, child_fd = pty.fork()
if not self.pid: # Child process
# Replace child process with our main process
if not self.kwargs['emulate']:
try:
os.execv(self.cmd[0], self.cmd)
except FileNotFoundError:
self.status = 'done'
log(f"{self.cmd[0]} does not exist.", origin='spawn', level=2)
self.exit_code = 1
return False
os.chdir(old_dir)
poller = epoll()
poller.register(child_fd, EPOLLIN | EPOLLHUP)
if 'events' in self.kwargs and 'debug' in self.kwargs:
log(f'[D] Using triggers for command: {self.cmd}')
log(json.dumps(self.kwargs['events']))
alive = True
last_trigger_pos = 0
while alive and not self.kwargs['emulate']:
for fileno, event in poller.poll(0.1):
try:
output = os.read(child_fd, 8192).strip()
self.trace_log += output
except OSError:
alive = False
break
if 'debug' in self.kwargs and self.kwargs['debug'] and len(output):
log(self.cmd, 'gave:', output.decode('UTF-8'))
if 'on_output' in self.kwargs:
self.kwargs['on_output'](self.kwargs['worker'], output)
lower = output.lower()
broke = False
if 'events' in self.kwargs:
for trigger in list(self.kwargs['events']):
if type(trigger) != bytes:
original = trigger
trigger = bytes(original, 'UTF-8')
self.kwargs['events'][trigger] = self.kwargs['events'][original]
del(self.kwargs['events'][original])
if type(self.kwargs['events'][trigger]) != bytes:
self.kwargs['events'][trigger] = bytes(self.kwargs['events'][trigger], 'UTF-8')
if trigger.lower() in self.trace_log[last_trigger_pos:].lower():
trigger_pos = self.trace_log[last_trigger_pos:].lower().find(trigger.lower())
if 'debug' in self.kwargs and self.kwargs['debug']:
log(f"Writing to subprocess {self.cmd[0]}: {self.kwargs['events'][trigger].decode('UTF-8')}")
log(f"Writing to subprocess {self.cmd[0]}: {self.kwargs['events'][trigger].decode('UTF-8')}", origin='spawn', level=5)
last_trigger_pos = trigger_pos
os.write(child_fd, self.kwargs['events'][trigger])
del(self.kwargs['events'][trigger])
broke = True
break
if broke:
continue
## Adding a exit trigger:
if len(self.kwargs['events']) == 0:
if 'debug' in self.kwargs and self.kwargs['debug']:
log(f"Waiting for last command {self.cmd[0]} to finish.", origin='spawn', level=4)
if bytes(f']$'.lower(), 'UTF-8') in self.trace_log[0-len(f']$')-5:].lower():
if 'debug' in self.kwargs and self.kwargs['debug']:
log(f"{self.cmd[0]} has finished.")
alive = False
break
self.status = 'done'
if 'debug' in self.kwargs and self.kwargs['debug']:
log(f"{self.cmd[0]} waiting for exit code.")
if not self.kwargs['emulate']:
try:
self.exit_code = os.waitpid(self.pid, 0)[1]
except ChildProcessError:
try:
self.exit_code = os.waitpid(child_fd, 0)[1]
except ChildProcessError:
self.exit_code = 1
else:
self.exit_code = 0
if 'debug' in self.kwargs and self.kwargs['debug']:
log(f"{self.cmd[0]} got exit code: {self.exit_code}")
if 'ignore_errors' in self.kwargs:
self.exit_code = 0
if self.exit_code != 0 and not self.kwargs['surpress_errors']:
log(f"'{self.raw_cmd}' did not exit gracefully, exit code {self.exit_code}.")
log(self.trace_log.decode('UTF-8'))
raise SysCallError(f"'{self.raw_cmd}' did not exit gracefully, exit code {self.exit_code}.\n{self.trace_log.decode('UTF-8')}")
self.ended = time.time()
with open(f'{self.cwd}/trace.log', 'wb') as fh:
fh.write(self.trace_log)
def prerequisit_check():
if not os.path.isdir('/sys/firmware/efi'):
raise RequirementError('Archinstall only supports machines in UEFI mode.')
return True
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