List micromamba envs based on the filesystem instead of subprocess

src/glicid_spawner/pyenv.py

@@ -1,8 +1,8 @@
 """Python environment module."""
 
-import shlex
-import subprocess
 from dataclasses import dataclass
+from operator import itemgetter
+from pathlib import Path
 
 
 @dataclass
@@ -34,40 +34,39 @@ class GlobalPyEnv(PyEnv):
     scope = 'GLOBAL'
 
 
-def _micromamba_env_list(root_prefix='', base=False):
+def _micromamba_path(path: str) -> Path:
-    """List micromamba environment list."""
+    """Micromamba path environments locations."""
-    env_list = subprocess.run(
+    return Path(f'/micromamba/{path}/envs')
-        shlex.split('/usr/local/bin/micromamba env list --quiet'),  # noqa: S603 (FIXME)
-        env={'MAMBA_ROOT_PREFIX': root_prefix},
-        capture_output=True,
-        text=True,
-        check=False,
-    )
 
-    return [map(str.strip, env.split()) for env in env_list.stdout.splitlines()[2 if base else 3 :]]
+
+def _micromamba_envs(path, excluded=None) -> list:
+    """List micromamba environment list."""
+    if excluded is None:
+        excluded = []
+    elif isinstance(excluded, str):
+        excluded = [excluded]
+
+    envs = _micromamba_path(path)
+    return sorted(
+        [(f.name, f.absolute()) for f in envs.iterdir() if f.is_dir() and f.name not in excluded],
+        key=itemgetter(0),
+    )
 
 
 def get_pyenv_user(username: str) -> list:
     """List of python environment available to the user."""
-    return [
+    return [UserPyEnv(*env) for env in _micromamba_envs(username)]
-        UserPyEnv(*env)
-        for env in _micromamba_env_list(root_prefix=f'/micromamba/{username}/', base=True)
-    ]
 
 
 def get_pyenv_team(username: str) -> list:
     """List of python environment available to the user's team."""
     teams = []  # FIXME: pull user teams list from groups
-    return [
+    return [TeamPyEnv(*env) for team in teams for env in _micromamba_envs(f'teams/{team}')]
-        TeamPyEnv(*env)
-        for team in teams
-        for env in _micromamba_env_list(root_prefix=f'/micromamba/teams/{team}')
-    ]
 
 
 def get_pyenv_global() -> list:
     """List of python environment available globally."""
-    return [GlobalPyEnv(*env) for env in _micromamba_env_list(root_prefix='/micromamba/operator/')]
+    return [GlobalPyEnv(*env) for env in _micromamba_envs('operator', excluded='glicid-jupyterhub')]
 
 
 def get_pyenv(username: str) -> list: