Viewing file:  utils.py (3.48 KB) -rw-r--r--
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import math
import os
import platform
import ssl
import subprocess
import sys
import distro
import docker
import compose
from ..const import IS_WINDOWS_PLATFORM
def yesno(prompt, default=None):
"""
Prompt the user for a yes or no.
Can optionally specify a default value, which will only be
used if they enter a blank line.
Unrecognised input (anything other than "y", "n", "yes",
"no" or "") will return None.
"""
answer = input(prompt).strip().lower()
if answer == "y" or answer == "yes":
return True
elif answer == "n" or answer == "no":
return False
elif answer == "":
return default
else:
return None
def input(prompt):
"""
Version of input (raw_input in Python 2) which forces a flush of sys.stdout
to avoid problems where the prompt fails to appear due to line buffering
"""
sys.stdout.write(prompt)
sys.stdout.flush()
return sys.stdin.readline().rstrip('\n')
def call_silently(*args, **kwargs):
"""
Like subprocess.call(), but redirects stdout and stderr to /dev/null.
"""
with open(os.devnull, 'w') as shutup:
try:
return subprocess.call(*args, stdout=shutup, stderr=shutup, **kwargs)
except OSError:
# On Windows, subprocess.call() can still raise exceptions. Normalize
# to POSIXy behaviour by returning a nonzero exit code.
return 1
def is_mac():
return platform.system() == 'Darwin'
def is_ubuntu():
return platform.system() == 'Linux' and distro.linux_distribution()[0] == 'Ubuntu'
def is_windows():
return IS_WINDOWS_PLATFORM
def get_version_info(scope):
versioninfo = 'docker-compose version {}, build {}'.format(
compose.__version__,
get_build_version())
if scope == 'compose':
return versioninfo
if scope == 'full':
return (
"{}\n"
"docker-py version: {}\n"
"{} version: {}\n"
"OpenSSL version: {}"
).format(
versioninfo,
docker.version,
platform.python_implementation(),
platform.python_version(),
ssl.OPENSSL_VERSION)
raise ValueError("{} is not a valid version scope".format(scope))
def get_build_version():
filename = os.path.join(os.path.dirname(compose.__file__), 'GITSHA')
if not os.path.exists(filename):
return 'unknown'
with open(filename) as fh:
return fh.read().strip()
def is_docker_for_mac_installed():
return is_mac() and os.path.isdir('/Applications/Docker.app')
def generate_user_agent():
parts = [
"docker-compose/{}".format(compose.__version__),
"docker-py/{}".format(docker.__version__),
]
try:
p_system = platform.system()
p_release = platform.release()
except OSError:
pass
else:
parts.append("{}/{}".format(p_system, p_release))
return " ".join(parts)
def human_readable_file_size(size):
suffixes = ['B', 'kB', 'MB', 'GB', 'TB', 'PB', 'EB', ]
order = int(math.log(size, 1000)) if size else 0
if order >= len(suffixes):
order = len(suffixes) - 1
return '{:.4g} {}'.format(
size / pow(10, order * 3),
suffixes[order]
)
def binarystr_to_unicode(s):
if not isinstance(s, bytes):
return s
if IS_WINDOWS_PLATFORM:
try:
return s.decode('windows-1250')
except UnicodeDecodeError:
pass
return s.decode('utf-8', 'replace')
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