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tesh.py
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tesh.py
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#! @PYTHON_EXECUTABLE@
# -*- coding: utf-8 -*-
"""
tesh -- testing shell
========================
Copyright (c) 2012-2017. The SimGrid Team. All rights reserved.
This program is free software; you can redistribute it and/or modify it
under the terms of the license (GNU LGPL) which comes with this package.
#TODO: child of child of child that printfs. Does it work?
#TODO: a child dies after its parent. What happen?
#TODO: regular expression in output
#ex: >> Time taken: [0-9]+s
#TODO: linked regular expression in output
#ex:
# >> Bytes sent: ([0-9]+)
# >> Bytes recv: \1
# then, even better:
# ! expect (\1 > 500)
"""
import sys, os
import shlex
import re
import difflib
import signal
import argparse
if sys.version_info[0] == 3:
import subprocess
import _thread
else:
raise "This program is expected to run with Python3 only"
##############
#
# Utilities
#
#
# Singleton metaclass that works in Python 2 & 3
# http://stackoverflow.com/questions/6760685/creating-a-singleton-in-python
class _Singleton(type):
""" A metaclass that creates a Singleton base class when called. """
_instances = {}
def __call__(cls, *args, **kwargs):
if cls not in cls._instances:
cls._instances[cls] = super(_Singleton, cls).__call__(*args, **kwargs)
return cls._instances[cls]
class Singleton(_Singleton('SingletonMeta', (object,), {})): pass
SIGNALS_TO_NAMES_DICT = dict((getattr(signal, n), n) \
for n in dir(signal) if n.startswith('SIG') and '_' not in n )
#exit correctly
def tesh_exit(errcode):
#If you do not flush some prints are skipped
sys.stdout.flush()
#os._exit exit even when executed within a thread
os._exit(errcode)
def fatal_error(msg):
print("[Tesh/CRITICAL] "+str(msg))
tesh_exit(1)
#Set an environment variable.
# arg must be a string with the format "variable=value"
def setenv(arg):
print("[Tesh/INFO] setenv "+arg)
t = arg.split("=")
os.environ[t[0]] = t[1]
#os.putenv(t[0], t[1]) does not work
#see http://stackoverflow.com/questions/17705419/python-os-environ-os-putenv-usr-bin-env
#http://stackoverflow.com/questions/30734967/how-to-expand-environment-variables-in-python-as-bash-does
def expandvars2(path):
return re.sub(r'(?<!\\)\$[A-Za-z_][A-Za-z0-9_]*', '', os.path.expandvars(path))
# https://github.com/Cadair/jupyter_environment_kernels/issues/10
try:
FileNotFoundError
except NameError:
#py2
FileNotFoundError = OSError
##############
#
# Classes
#
#
# read file line per line (and concat line that ends with "\")
class FileReader(Singleton):
def __init__(self, filename=None):
if filename is None:
self.filename = "(stdin)"
self.f = sys.stdin
else:
self.filename_raw = filename
self.filename = os.path.basename(filename)
self.abspath = os.path.abspath(filename)
self.f = open(self.filename_raw)
self.linenumber = 0
def __repr__(self):
return self.filename+":"+str(self.linenumber)
def readfullline(self):
try:
line = next(self.f)
self.linenumber += 1
except StopIteration:
return None
if line[-1] == "\n":
txt = line[0:-1]
else:
txt = line
while len(line) > 1 and line[-2] == "\\":
txt = txt[0:-1]
line = next(self.f)
self.linenumber += 1
txt += line[0:-1]
return txt
#keep the state of tesh (mostly configuration values)
class TeshState(Singleton):
def __init__(self):
self.threads = []
self.args_suffix = ""
self.ignore_regexps_common = []
self.jenkins = False # not a Jenkins run by default
self.timeout = 10 # default value: 10 sec
self.wrapper = None
self.keep = False
def add_thread(self, thread):
self.threads.append(thread)
def join_all_threads(self):
for t in self.threads:
t.acquire()
t.release()
#Command line object
class Cmd(object):
def __init__(self):
self.input_pipe = []
self.output_pipe_stdout = []
self.output_pipe_stderr = []
self.timeout = TeshState().timeout
self.args = None
self.linenumber = -1
self.background = False
self.cwd = None
self.ignore_output = False
self.expect_return = 0
self.output_display = False
self.sort = -1
self.ignore_regexps = TeshState().ignore_regexps_common
def add_input_pipe(self, l):
self.input_pipe.append(l)
def add_output_pipe_stdout(self, l):
self.output_pipe_stdout.append(l)
def add_output_pipe_stderr(self, l):
self.output_pipe_stderr.append(l)
def set_cmd(self, args, linenumber):
self.args = args
self.linenumber = linenumber
def add_ignore(self, txt):
self.ignore_regexps.append(re.compile(txt))
def remove_ignored_lines(self, lines):
for ign in self.ignore_regexps:
lines = [l for l in lines if not ign.match(l)]
return lines
def _cmd_mkfile(self, argline):
filename = argline[len("mkfile "):]
file = open(filename, "w")
if file is None:
fatal_error("Unable to create file "+filename)
file.write("\n".join(self.input_pipe))
file.write("\n")
file.close()
def _cmd_cd(self, argline):
args = shlex.split(argline)
if len(args) != 2:
fatal_error("Too many arguments to cd")
try:
os.chdir(args[1])
print("[Tesh/INFO] change directory to "+args[1])
except FileNotFoundError:
print("Chdir to "+args[1]+" failed: No such file or directory")
print("Test suite `"+FileReader().filename+"': NOK (system error)")
tesh_exit(4)
#Run the Cmd if possible.
# Return False if nothing has been ran.
def run_if_possible(self):
if self.can_run():
if self.background:
#Python threads loose the cwd
self.cwd = os.getcwd()
lock = _thread.allocate_lock()
lock.acquire()
TeshState().add_thread(lock)
_thread.start_new_thread( Cmd._run, (self, lock) )
else:
self._run()
return True
else:
return False
def _run(self, lock=None):
#Python threads loose the cwd
if self.cwd is not None:
os.chdir(self.cwd)
self.cwd = None
#retrocompatibility: support ${aaa:=.} variable format
def replace_perl_variables(m):
vname = m.group(1)
vdefault = m.group(2)
if vname in os.environ:
return "$"+vname
else:
return vdefault
self.args = re.sub(r"\${(\w+):=([^}]*)}", replace_perl_variables, self.args)
#replace bash environment variables ($THINGS) to their values
self.args = expandvars2(self.args)
if re.match("^mkfile ", self.args) is not None:
self._cmd_mkfile(self.args)
if lock is not None: lock.release()
return
if re.match("^cd ", self.args) is not None:
self._cmd_cd(self.args)
if lock is not None: lock.release()
return
if TeshState().wrapper is not None:
self.timeout *= 20
self.args = TeshState().wrapper + self.args
elif re.match(".*smpirun.*", self.args) is not None:
self.args = "sh " + self.args
if TeshState().jenkins and self.timeout != None:
self.timeout *= 10
self.args += TeshState().args_suffix
print("["+FileReader().filename+":"+str(self.linenumber)+"] "+self.args)
args = shlex.split(self.args)
#print (args)
try:
proc = subprocess.Popen(args, bufsize=1, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, universal_newlines=True)
except FileNotFoundError:
print("["+FileReader().filename+":"+str(self.linenumber)+"] Cannot start '"+args[0]+"': File not found")
tesh_exit(3)
except OSError as osE:
if osE.errno == 8:
osE.strerror += "\nOSError: [Errno 8] Executed scripts should start with shebang line (like #!/usr/bin/env sh)"
raise osE
cmdName = FileReader().filename+":"+str(self.linenumber)
try:
(stdout_data, stderr_data) = proc.communicate("\n".join(self.input_pipe), self.timeout)
except subprocess.TimeoutExpired:
print("Test suite `"+FileReader().filename+"': NOK (<"+cmdName+"> timeout after "+str(self.timeout)+" sec)")
proc.kill()
tesh_exit(3)
if self.output_display:
print(stdout_data)
#remove text colors
ansi_escape = re.compile(r'\x1b[^m]*m')
stdout_data = ansi_escape.sub('', stdout_data)
#print ((stdout_data, stderr_data))
if self.ignore_output:
print("(ignoring the output of <"+cmdName+"> as requested)")
else:
stdouta = stdout_data.split("\n")
while len(stdouta) > 0 and stdouta[-1] == "":
del stdouta[-1]
stdouta = self.remove_ignored_lines(stdouta)
stdcpy = stdouta[:]
# Mimic the "sort" bash command, which is case unsensitive.
if self.sort == 0:
stdouta.sort(key=lambda x: x.lower())
self.output_pipe_stdout.sort(key=lambda x: x.lower())
elif self.sort > 0:
stdouta.sort(key=lambda x: x[:self.sort].lower())
self.output_pipe_stdout.sort(key=lambda x: x[:self.sort].lower())
diff = list(difflib.unified_diff(self.output_pipe_stdout, stdouta,lineterm="",fromfile='expected', tofile='obtained'))
if len(diff) > 0:
print("Output of <"+cmdName+"> mismatch:")
if self.sort >= 0: # If sorted, truncate the diff output and show the unsorted version
difflen = 0;
for line in diff:
if difflen<50:
print(line)
difflen += 1
if difflen > 50:
print("(diff truncated after 50 lines)")
print("Unsorted observed output:\n")
for line in stdcpy:
print(line)
else: # If not sorted, just display the diff
for line in diff:
print(line)
print("Test suite `"+FileReader().filename+"': NOK (<"+cmdName+"> output mismatch)")
if lock is not None: lock.release()
if TeshState().keep:
f = open('obtained','w')
obtained = stdout_data.split("\n")
while len(obtained) > 0 and obtained[-1] == "":
del obtained[-1]
obtained = self.remove_ignored_lines(obtained)
for line in obtained:
f.write("> "+line+"\n")
f.close()
print("Obtained output kept as requested: "+os.path.abspath("obtained"))
tesh_exit(2)
#print ((proc.returncode, self.expect_return))
if proc.returncode != self.expect_return:
if proc.returncode >= 0:
print("Test suite `"+FileReader().filename+"': NOK (<"+cmdName+"> returned code "+str(proc.returncode)+")")
if lock is not None: lock.release()
tesh_exit(2)
else:
print("Test suite `"+FileReader().filename+"': NOK (<"+cmdName+"> got signal "+SIGNALS_TO_NAMES_DICT[-proc.returncode]+")")
if lock is not None: lock.release()
tesh_exit(-proc.returncode)
if lock is not None: lock.release()
def can_run(self):
return self.args is not None
##############
#
# Main
#
#
if __name__ == '__main__':
parser = argparse.ArgumentParser(description='tesh -- testing shell', add_help=True)
group1 = parser.add_argument_group('Options')
group1.add_argument('teshfile', nargs='?', help='Name of teshfile, stdin if omitted')
group1.add_argument('--cd', metavar='some/directory', help='ask tesh to switch the working directory before launching the tests')
group1.add_argument('--setenv', metavar='var=value', action='append', help='set a specific environment variable')
group1.add_argument('--cfg', metavar='arg', action='append', help='add parameter --cfg=arg to each command line')
group1.add_argument('--log', metavar='arg', action='append', help='add parameter --log=arg to each command line')
group1.add_argument('--ignore-jenkins', action='store_true', help='ignore all cruft generated on SimGrid continous integration servers')
group1.add_argument('--wrapper', metavar='arg', help='Run each command in the provided wrapper (eg valgrind)')
group1.add_argument('--keep', action='store_true', help='Keep the obtained output when it does not match the expected one')
try:
options = parser.parse_args()
except SystemExit:
tesh_exit(1)
if options.cd is not None:
print("[Tesh/INFO] change directory to " + options.cd)
os.chdir(options.cd)
if options.ignore_jenkins:
print("Ignore all cruft seen on SimGrid's continous integration servers")
# Note: regexps should match at the beginning of lines
TeshState().ignore_regexps_common = [
re.compile("profiling:"),
re.compile("Unable to clean temporary file C:"),
re.compile(".*Configuration change: Set \'contexts/"),
re.compile("Picked up JAVA_TOOL_OPTIONS: "),
re.compile("Picked up _JAVA_OPTIONS: "),
re.compile("==[0-9]+== ?WARNING: ASan doesn\'t fully support"),
re.compile("==[0-9]+== ?WARNING: ASan is ignoring requested __asan_handle_no_return: stack top:"),
re.compile("False positive error reports may follow"),
re.compile("For details see http://code.google.com/p/address-sanitizer/issues/detail\\?id=189"),
re.compile("For details see https://github.com/google/sanitizers/issues/189"),
re.compile("Python runtime initialized with LC_CTYPE=C .*"),
re.compile("cmake: /usr/local/lib/libcurl.so.4: no version information available (required by cmake)"), # Seen on CircleCI
]
TeshState().jenkins = True # This is a Jenkins build
if options.teshfile is None:
f = FileReader(None)
print("Test suite from stdin")
else:
if not os.path.isfile(options.teshfile):
print("Cannot open teshfile '"+options.teshfile+"': File not found")
tesh_exit(3)
f = FileReader(options.teshfile)
print("Test suite '"+f.abspath+"'")
if options.setenv is not None:
for e in options.setenv:
setenv(e)
if options.cfg is not None:
for c in options.cfg:
TeshState().args_suffix += " --cfg=" + c
if options.log is not None:
for l in options.log:
TeshState().args_suffix += " --log=" + l
if options.wrapper is not None:
TeshState().wrapper = options.wrapper
if options.keep:
TeshState().keep = True
#cmd holds the current command line
# tech commands will add some parameters to it
# when ready, we execute it.
cmd = Cmd()
line = f.readfullline()
while line is not None:
#print(">>============="+line+"==<<")
if len(line) == 0:
#print ("END CMD block")
if cmd.run_if_possible():
cmd = Cmd()
elif line[0] == "#":
pass
elif line[0:2] == "p ":
print("["+str(FileReader())+"] "+line[2:])
elif line[0:2] == "< ":
cmd.add_input_pipe(line[2:])
elif line[0:1] == "<":
cmd.add_input_pipe(line[1:])
elif line[0:2] == "> ":
cmd.add_output_pipe_stdout(line[2:])
elif line[0:1] == ">":
cmd.add_output_pipe_stdout(line[1:])
elif line[0:2] == "$ ":
if cmd.run_if_possible():
cmd = Cmd()
cmd.set_cmd(line[2:], f.linenumber)
elif line[0:2] == "& ":
if cmd.run_if_possible():
cmd = Cmd()
cmd.set_cmd(line[2:], f.linenumber)
cmd.background = True
elif line[0:15] == "! output ignore":
cmd.ignore_output = True
#print("cmd.ignore_output = True")
elif line[0:16] == "! output display":
cmd.output_display = True
cmd.ignore_output = True
elif line[0:15] == "! expect return":
cmd.expect_return = int(line[16:])
#print("expect return "+str(int(line[16:])))
elif line[0:15] == "! expect signal":
sig = line[16:]
#get the signal integer value from the signal module
if sig not in signal.__dict__:
fatal_error("unrecognized signal '"+sig+"'")
sig = int(signal.__dict__[sig])
#popen return -signal when a process ends with a signal
cmd.expect_return = -sig
elif line[0:len("! timeout ")] == "! timeout ":
if "no" in line[len("! timeout "):]:
cmd.timeout = None
else:
cmd.timeout = int(line[len("! timeout "):])
elif line[0:len("! output sort")] == "! output sort":
if len(line) >= len("! output sort "):
sort = int(line[len("! output sort "):])
else:
sort = 0
cmd.sort = sort
elif line[0:len("! setenv ")] == "! setenv ":
setenv(line[len("! setenv "):])
elif line[0:len("! ignore ")] == "! ignore ":
cmd.add_ignore(line[len("! ignore "):])
else:
fatal_error("UNRECOGNIZED OPTION")
line = f.readfullline()
cmd.run_if_possible()
TeshState().join_all_threads()
if f.filename == "(stdin)":
print("Test suite from stdin OK")
else:
print("Test suite `"+f.filename+"' OK")