[tox]
envlist = py35,py36,py37,py38
isolated_build = true
minversion = 3.21.0

[testenv]
deps =
    -rrequirements.txt
    -rrequirements-testing.txt
command = pytest


[dists]
setenv =
  PEP517_OUT_DIR = {env:PEP517_OUT_DIR:{toxinidir}{/}dist}


[testenv:cleanup-dists]
description =
  Wipe the the `{env:PEP517_OUT_DIR}{/}` folder
usedevelop = false
skip_install = true
deps =
setenv =
  {[dists]setenv}
commands =
  {envpython} -c \
    'import os, shutil, sys; dists_dir = os.getenv("PEP517_OUT_DIR"); shutil.rmtree(dists_dir, ignore_errors=True); sys.exit(os.path.exists(dists_dir))'


[testenv:build-dists]
description =
  Build non-universal dists and put them into
  the `{env:PEP517_OUT_DIR}{/}` folder
depends =
  cleanup-dists
isolated_build = true
# `usedevelop = true` overrides `skip_install` instruction, it's unwanted
usedevelop = false
skip_install = true
deps =
  build >= 0.7.0, < 0.8.0
passenv =
  PEP517_BUILD_ARGS
setenv =
  {[dists]setenv}
commands =
  {envpython} -m build \
    --outdir '{env:PEP517_OUT_DIR}{/}' \
    {posargs:{env:PEP517_BUILD_ARGS:}} \
    '{toxinidir}'


[testenv:metadata-validation]
description =
  Verify that dists under the `{env:PEP517_OUT_DIR}{/}` dir
  have valid metadata
depends =
  build-dists
deps =
  twine
usedevelop = false
skip_install = true
setenv =
  {[dists]setenv}
commands =
  {envpython} -m twine check \
    --strict \
    {env:PEP517_OUT_DIR}{/}*


[testenv:lint]
description =
  Enforce quality standards under `{basepython}` ({envpython})
commands =
  {envpython} -m \
    pre_commit run \
    --show-diff-on-failure \
    --hook-stage manual \
    {posargs:--all-files}

  # Print out the advice on how to install pre-commit from this env into Git:
  -{envpython} -c \
  'cmd = "{envpython} -m pre_commit install"; \
    scr_width = len(cmd) + 10; \
    sep = "=" * scr_width; \
    cmd_str = "    $ \{cmd\}";' \
    'print(f"\n\{sep\}\nTo install pre-commit hooks into the Git repo, run:\n\n\{cmd_str\}\n\n\{sep\}\n")'
deps =
  pre-commit
  pylint >= 2.5.3
  pylint-pytest < 1.1.0
  -r requirements-tunnel.txt
isolated_build = true
skip_install = true