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|
#!/usr/bin/python3
from MgaRepo import Error, config
import shlex
import subprocess
import getpass
import sys
import os
import re
import select
from io import StringIO
import httplib2
class CommandError(Error):
def __init__(self, cmdline, status, output):
self.cmdline = cmdline
self.status = status
self.output = output
def __str__(self):
return "command failed: %s\n%s\n" % (self.cmdline, self.output)
def execcmd(*cmd, **kwargs):
assert (kwargs.get("collecterr") and kwargs.get("show")) or not kwargs.get("collecterr"), \
("execcmd is implemented to handle collecterr=True only if show=True")
# split command args
if isinstance(cmd[0], str):
if len(cmd) is 1:
cmdargs = shlex.split(cmd[0])
else:
cmdargs = cmd[:]
else:
cmdargs = cmd[0][:]
stdout = None
stderr = None
env = {}
env.update(os.environ)
if kwargs.get("info") or not kwargs.get("show") or (kwargs.get("show") and kwargs.get("collecterr")):
if kwargs.get("info"):
env.update({"LANGUAGE": "C", "LC_TIME": "C"})
else:
env.update({"LANG": "C", "LANGUAGE": "C", "LC_ALL": "C"})
stdout = subprocess.PIPE
if kwargs.get("collecterr"):
stderr = subprocess.PIPE
else:
stderr = subprocess.STDOUT
proc = subprocess.Popen(cmdargs, shell=False, stdout=stdout,
stderr=stderr, env=env)
output = ""
if kwargs.get("show") and kwargs.get("collecterr"):
error = StringIO()
wl = []
outfd = proc.stdout.fileno()
errfd = proc.stderr.fileno()
rl = [outfd, errfd]
xl = wl
while proc.poll() is None:
mrl, _, _ = select.select(rl, wl, xl, 0.5)
for fd in mrl:
data = os.read(fd, 8192).decode('utf8')
if fd == errfd:
error.write(data)
sys.stderr.write(data)
else:
sys.stdout.write(data)
output = error.getvalue()
else:
# Make sure to avoid buffer getting full.
# Otherwise if ie. using proc.wait() both python
# and the process will just hang
while proc.poll() is None:
if proc.stdout is not None:
output += proc.stdout.read(8192).decode('utf8')
# Make sure that we've emptied the buffer entirely
output += proc.stdout.read().decode('utf8')
if kwargs.get("strip", True):
output = output.rstrip()
if (not kwargs.get("noerror")) and proc.returncode != 0:
if kwargs.get("cleanerr"):
msg = output
cmdline = subprocess.list2cmdline(cmdargs)
raise CommandError(cmdline, proc.returncode, output)
return proc.returncode, output
def get_output_exec(cmdstr):
output = StringIO()
err = StringIO()
p = subprocess.Popen(cmdstr, shell=True,
stdout=subprocess.PIPE, stderr=subprocess.PIPE)
of = p.stdout.fileno()
ef = p.stderr.fileno()
while True:
r,w,x = select.select((of,ef), (), ())
odata = None
if of in r:
odata = (os.read(of, 8192)).decode('utf8')
output.write(odata)
edata = None
if ef in r:
edata = (os.read(ef, 8192)).decode('utf8')
err.write(edata)
status = p.poll()
if status is not None and odata == '' and edata == '':
break
return output.getvalue()
def get_auth(username=None, password=None):
set_username = 1
set_password = 1
if not username:
username = config.get("auth", "username")
if not username:
username = input("username: ")
else:
set_username = 0
if not password:
password = config.get("auth", "password")
if not password:
password = getpass.getpass("password: ")
else:
set_password = 0
if set_username:
config.set("auth", "username", username)
if set_password:
config.set("auth", "password", password)
return username, password
def mapurl(url):
"""Maps a url following the regexp provided by the option url-map in
mgarepo.conf
"""
urlmap = config.get("global", "url-map")
newurl = url
if urlmap:
try:
expr_, replace = urlmap.split()[:2]
except ValueError:
sys.stderr.buffer.write("invalid url-map: %s" % urlmap)
else:
try:
newurl = re.sub(expr_, replace, url)
except re.error as errmsg:
sys.stderr.buffer.write("error in URL mapping regexp: %s" % errmsg)
return newurl
def get_helper(name):
"""Tries to find the path of a helper script
It first looks if the helper has been explicitly defined in
configuration, if not, falls back to the default helper path, which can
also be defined in configuration file(s).
"""
helperdir = config.get("helper", "prefix", "/usr/share/mgarepo")
hpath = config.get("helper", name, None) or \
os.path.join(helperdir, name)
return hpath
def rellink(src, dst):
"""Creates relative symlinks
It will find the common ancestor and append to the src path.
"""
asrc = os.path.abspath(src)
adst = os.path.abspath(dst)
csrc = asrc.split(os.path.sep)
cdst = adst.split(os.path.sep)
dstname = cdst.pop()
i = 0
l = min(len(csrc), len(cdst))
while i < l:
if csrc[i] != cdst[i]:
break
i += 1
dstextra = len(cdst[i:])
steps = [os.path.pardir] * dstextra
steps.extend(csrc[i:])
return os.path.sep.join(steps)
def maintdb_get(package):
dlurl = config.get("maintdb", "url",
"http://maintdb.mageia.org/")
dlurl = dlurl + "/" + package
h = httplib2.Http()
resp, content = h.request(dlurl, 'GET')
if resp.status != 200:
raise Exception('Package cannot be found in maintdb')
return content.rstrip('\n')
# vim:et:ts=4:sw=4
|
