def check_environment() -> bool:
"""
Check if "opam config env" has set all the required environment variables
:return: True for valid environment configuration and False otherwise
"""
__opam_env__ = [
'CAML_LD_LIBRARY_PATH',
'MANPATH',
'PERL5LIB',
'OCAML_TOPLEVEL_PATH',
'PATH'
]
for var in __opam_env__:
if not os.environ.get(var, None):
return False
PATH = os.environ.get('PATH')
try:
OCAML_VERSION = subprocess.check_output(
_convert_subprocess_cmd('ocaml -vnum')
).decode('utf-8').strip()
except subprocess.CalledProcessError:
return False
for path in PATH.split(':'):
if path.endswith(
os.path.join('.opam', 'system', 'bin')
) or path.endswith(
os.path.join('.opam', OCAML_VERSION, 'bin')
):
return True
def check_mirage() -> bool:
"""
Check if MirageOS is installed by "opam"
:return: True if dune can find "mirage", False otherwise
"""
try:
subprocess.check_output(
_convert_subprocess_cmd('which mirage')
)
except subprocess.CalledProcessError:
return False
else:
return True
def check_redis_queue() -> bool:
"""
Check if at least one worker is running in Python Redis Queue
:return: True if at least 1 worker is running, False otherwise
"""
try:
out = subprocess.check_output(
_convert_subprocess_cmd('rq info')
).decode('utf-8')
except FileNotFoundError as e:
return False
else:
if '0 workers' in out:
return False
return True
def check_privilege() -> bool:
"""
Check if current user can execute apt-get on host without root access
:return: True if apt-get is in sudoers list, False otherwise
"""
try:
out = subprocess.check_output(
_convert_subprocess_cmd('sudo -l')
).decode('utf-8')
except subprocess.CalledProcessError:
pass
else:
# Check README.md for more details on how to add apt-get to sudoers list
if 'User root' not in out and '(ALL : ALL) NOPASSWD: /usr/bin/apt-get install *' in out:
return True
else:
return False
