import json
import os.path
import shutil
import subprocess
import sys
from abc import ABC, abstractmethod
from typing import List, Union
import yaml
from loguru import logger
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class Env(ABC):
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@abstractmethod
def create(self):
"""
Create an environment.
"""
raise NotImplementedError("This method must be implemented in subclass.")
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@abstractmethod
def check_availability(self):
"""
Check the availability of the environment manager.
"""
raise NotImplementedError("This method must be implemented in subclass.")
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@abstractmethod
def exists(self):
"""
Check if an environment exists.
"""
raise NotImplementedError("This method must be implemented in subclass.")
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@abstractmethod
def install_py_deps(self):
"""
Install Python dependencies.
"""
raise NotImplementedError("This method must be implemented in subclass.")
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@abstractmethod
def run_cmd(self):
"""
Run a command in this environment.
"""
raise NotImplementedError("This method must be implemented in subclass.")
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class CondaEnv(Env):
"""
Conda environment.
"""
SUPPORTED_MANAGERS = {"conda", "mamba"}
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def __init__(
self, env_manager: str = "conda", env_config_path: str = None, env_name: str = None, env_py_version: str = None
):
assert env_manager in self.SUPPORTED_MANAGERS
self.env_manager = env_manager
self.env_config_path = env_config_path
self.env_name = env_name
self.env_py_version = env_py_version or "3.10"
self.check_availability()
if self.env_config_path is None and self.env_name is None:
raise ValueError("Either env_config_path or env_name must be specified.")
if self.env_config_path is not None:
config = yaml.safe_load(open(self.env_config_path, "r"))
self.env_name = config["name"]
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def check_availability(self):
"""
Check the availability of the environment manager.
"""
if shutil.which(self.env_manager) is None:
raise ValueError(f"{self.env_manager} is not available.")
return True
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def create(self):
"""
Create an environment.
"""
if self.exists():
logger.info(f"Environment {self.env_name} already exists.")
return
if self.env_config_path is not None:
cmd = f"{self.env_manager} env create -f {self.env_config_path}"
elif self.env_name is not None:
cmd = f"{self.env_manager} create -n {self.env_name} -y"
cmd += f" python={self.env_py_version}"
else:
raise ValueError("Either env_config_path or env_name must be specified.")
# init the env
cmd += f" && {self.env_manager} init"
logger.info(f"Creating environment {self.env_name}...")
res = subprocess.run(cmd, shell=True)
if res.returncode == 0:
logger.info(f"Environment [{self.env_name}] created successfully.")
return True
else:
raise ValueError(f"Failed to create environment {self.env_name}.")
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def exists(self):
"""
Check if an environment exists.
"""
try:
res = subprocess.run(
[self.env_manager, "env", "list", "--json"],
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
text=True,
check=True,
)
envs = json.loads(res.stdout).get("envs", [])
for env_path in envs:
if os.path.basename(env_path) == self.env_name:
return True
return False
except Exception as e:
logger.error(f"Failed to check environment existence: {e}.")
return False
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def install_py_deps(self, deps: Union[str, List[str]]):
"""
Install Python dependencies.
Support 3 ways:
1. given a requirements.txt file path.
2. given a directory path to a library code base.
3. given a list of deps.
"""
if isinstance(deps, str):
if os.path.exists(deps):
if os.path.isdir(deps):
logger.info(f"Installing library code base [{deps}]...")
cmd = f"{self.env_manager} run -n {self.env_name} pip install -e {deps}"
else:
logger.info(f"Installing from requirements file [{deps}]...")
cmd = f"{self.env_manager} run -n {self.env_name} pip install -r {deps}"
else:
raise FileNotFoundError(f"deps path [{deps}] does not exist.")
elif isinstance(deps, list):
logger.info(f"Installing Python dependencies [{deps}]...")
deps = [f'"{dep}"' for dep in deps]
cmd = f'{self.env_manager} run -n {self.env_name} pip install {" ".join(deps)}'
else:
raise TypeError(f"deps must be a string or a list, got {type(deps)}")
res = subprocess.run(cmd, shell=True)
if res.returncode == 0:
logger.info("Python dependencies installed successfully.")
return True
else:
raise RuntimeError("Failed to install Python dependencies.")
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def run_cmd(self, cmd: str, use_sys_stdio=False):
"""
Run a command in this environment.
"""
cmd = f"{self.env_manager} run -n {self.env_name} bash -c '{cmd}'"
if use_sys_stdio:
stdout, stderr = sys.stdout, sys.stderr
else:
stdout, stderr = None, None
res = subprocess.run(cmd, shell=True, stdout=stdout, stderr=stderr)
if res.returncode == 0:
logger.debug(f"Command [{cmd}] executed successfully.")
return True
else:
raise RuntimeError(f"Failed to execute command [{cmd}].")
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class VirtualEnv(Env):
"""
Conda environment.
"""
SUPPORTED_MANAGERS = {"venv": "python -m venv", "virtualenv": "virtualenv", "uv": "uv venv"}
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def __init__(self, env_manager: str = "venv", env_name: str = None):
assert env_manager in self.SUPPORTED_MANAGERS
self.env_manager = self.SUPPORTED_MANAGERS[env_manager]
self.env_name = env_name
self.check_availability()
if self.env_name is None:
raise ValueError("env_name must be specified.")
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def check_availability(self):
"""
Check the availability of the environment manager.
"""
test_cmd = f"{self.env_manager} --help"
res = subprocess.run(test_cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, text=True, shell=True)
if res.returncode != 0:
raise ValueError(f"{self.env_manager} is not available.")
return True
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def create(self):
"""
Create an environment.
"""
if self.exists():
logger.info(f"Environment {self.env_name} already exists.")
return
if self.env_name is not None:
cmd = f"{self.env_manager} {self.env_name}"
else:
raise ValueError("Either env_config_path or env_name must be specified.")
logger.info(f"Creating environment {self.env_name}...")
res = subprocess.run(cmd, shell=True)
if res.returncode == 0:
logger.info(f"Environment [{self.env_name}] created successfully.")
return True
else:
raise ValueError(f"Failed to create environment {self.env_name}.")
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def exists(self):
"""
Check if an environment exists.
"""
return (
os.path.exists(self.env_name)
and os.path.isdir(self.env_name)
and os.path.exists(os.path.join(self.env_name, "bin", "activate"))
)
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def install_py_deps(self, deps: Union[str, List[str]]):
"""
Install Python dependencies.
Support 3 ways:
1. given a requirements.txt file path.
2. given a directory path to a library code base.
3. given a list of deps.
"""
cmd = f"source {self.env_name}/bin/activate"
if isinstance(deps, str):
if os.path.exists(deps):
if os.path.isdir(deps):
cmd += f" && pip install -e {deps}"
else:
cmd += f" && pip install -r {deps}"
else:
raise FileNotFoundError(f"deps path [{deps}] does not exist.")
elif isinstance(deps, list):
deps = [f'"{dep}"' for dep in deps]
cmd += f' && pip install {" ".join(deps)}'
else:
raise TypeError(f"deps must be a string or a list, got {type(deps)}")
cmd += " && deactivate"
res = subprocess.run(cmd, shell=True)
if res.returncode == 0:
logger.info("Python dependencies installed successfully.")
return True
else:
raise RuntimeError("Failed to install Python dependencies.")
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def run_cmd(self, cmd: str):
"""
Run a command in this environment.
"""
cmd = f"source {self.env_name}/bin/activate && {cmd} && deactivate"
res = subprocess.run(cmd, shell=True)
if res.returncode == 0:
logger.debug(f"Command [{cmd}] executed successfully.")
return True
else:
raise RuntimeError(f"Failed to execute command [{cmd}].")
ALL_ENVS = {CondaEnv, VirtualEnv}
ENV_ROUTER = {}
for env_cls in ALL_ENVS:
for env_name in env_cls.SUPPORTED_MANAGERS:
ENV_ROUTER[env_name] = env_cls
