split tox jobs

setup.cfg

@@ -2,25 +2,31 @@
 addopts = --typeguard-packages=radicale
 
 [tox:tox]
+min_version = 4.0
+envlist = py, flake8, isort, mypy
 
 [testenv]
-extras = test
+extras =
+    test
 deps =
-    flake8
-    isort
-    # mypy installation fails with pypy<3.9
-    mypy; implementation_name!='pypy' or python_version>='3.9'
-    types-setuptools
+    pytest
     pytest-cov
-commands =
-    flake8 .
-    isort --check --diff .
-    # Run mypy if it's installed
-    python -c 'import importlib.util, subprocess, sys; \
-               importlib.util.find_spec("mypy") \
-                   and sys.exit(subprocess.run(["mypy", "."]).returncode) \
-                   or print("Skipped: mypy is not installed")'
-    pytest -r s --cov --cov-report=term --cov-report=xml .
+commands = pytest -r s --cov --cov-report=term --cov-report=xml .
+
+[testenv:flake8]
+deps = flake8
+commands = flake8 .
+skip_install = True
+
+[testenv:isort]
+deps = isort
+commands = isort --check --diff .
+skip_install = True
+
+[testenv:mypy]
+deps = mypy
+commands = mypy .
+skip_install = True
 
 [tool:isort]
 known_standard_library = _dummy_thread,_thread,abc,aifc,argparse,array,ast,asynchat,asyncio,asyncore,atexit,audioop,base64,bdb,binascii,binhex,bisect,builtins,bz2,cProfile,calendar,cgi,cgitb,chunk,cmath,cmd,code,codecs,codeop,collections,colorsys,compileall,concurrent,configparser,contextlib,contextvars,copy,copyreg,crypt,csv,ctypes,curses,dataclasses,datetime,dbm,decimal,difflib,dis,distutils,doctest,dummy_threading,email,encodings,ensurepip,enum,errno,faulthandler,fcntl,filecmp,fileinput,fnmatch,formatter,fpectl,fractions,ftplib,functools,gc,getopt,getpass,gettext,glob,grp,gzip,hashlib,heapq,hmac,html,http,imaplib,imghdr,imp,importlib,inspect,io,ipaddress,itertools,json,keyword,lib2to3,linecache,locale,logging,lzma,macpath,mailbox,mailcap,marshal,math,mimetypes,mmap,modulefinder,msilib,msvcrt,multiprocessing,netrc,nis,nntplib,ntpath,numbers,operator,optparse,os,ossaudiodev,parser,pathlib,pdb,pickle,pickletools,pipes,pkgutil,platform,plistlib,poplib,posix,posixpath,pprint,profile,pstats,pty,pwd,py_compile,pyclbr,pydoc,queue,quopri,random,re,readline,reprlib,resource,rlcompleter,runpy,sched,secrets,select,selectors,shelve,shlex,shutil,signal,site,smtpd,smtplib,sndhdr,socket,socketserver,spwd,sqlite3,sre,sre_compile,sre_constants,sre_parse,ssl,stat,statistics,string,stringprep,struct,subprocess,sunau,symbol,symtable,sys,sysconfig,syslog,tabnanny,tarfile,telnetlib,tempfile,termios,test,textwrap,threading,time,timeit,tkinter,token,tokenize,trace,traceback,tracemalloc,tty,turtle,turtledemo,types,typing,unicodedata,unittest,urllib,uu,uuid,venv,warnings,wave,weakref,webbrowser,winreg,winsound,wsgiref,xdrlib,xml,xmlrpc,zipapp,zipfile,zipimport,zlib