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import os
import json
import hashlib
from docker import utils
from docker.constants import IS_WINDOWS_PLATFORM
from docker.constants import DEFAULT_UNIX_SOCKET
from docker.utils.config import find_config_file
METAFILE = "meta.json"
def get_current_context_name():
name = "default"
docker_cfg_path = find_config_file()
if docker_cfg_path:
try:
with open(docker_cfg_path) as f:
name = json.load(f).get("currentContext", "default")
except Exception:
return "default"
return name
def write_context_name_to_docker_config(name=None):
if name == 'default':
name = None
docker_cfg_path = find_config_file()
config = {}
if docker_cfg_path:
try:
with open(docker_cfg_path) as f:
config = json.load(f)
except Exception as e:
return e
current_context = config.get("currentContext", None)
if current_context and not name:
del config["currentContext"]
elif name:
config["currentContext"] = name
else:
return
try:
with open(docker_cfg_path, "w") as f:
json.dump(config, f, indent=4)
except Exception as e:
return e
def get_context_id(name):
return hashlib.sha256(name.encode('utf-8')).hexdigest()
def get_context_dir():
return os.path.join(os.path.dirname(find_config_file() or ""), "contexts")
def get_meta_dir(name=None):
meta_dir = os.path.join(get_context_dir(), "meta")
if name:
return os.path.join(meta_dir, get_context_id(name))
return meta_dir
def get_meta_file(name):
return os.path.join(get_meta_dir(name), METAFILE)
def get_tls_dir(name=None, endpoint=""):
context_dir = get_context_dir()
if name:
return os.path.join(context_dir, "tls", get_context_id(name), endpoint)
return os.path.join(context_dir, "tls")
def get_context_host(path=None, tls=False):
host = utils.parse_host(path, IS_WINDOWS_PLATFORM, tls)
if host == DEFAULT_UNIX_SOCKET:
# remove http+ from default docker socket url
return host.strip("http+")
return host
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