usedevelop = False, do not use pip for develop install due to PEP0517

Signed-off-by: Aleksei Stepanov <penguinolog@gmail.com>

(cherry picked from commit 756294c)
Signed-off-by: Aleksei Stepanov <penguinolog@gmail.com>

.travis.yml

@@ -27,7 +27,7 @@ _helpers:
   - &install_cython pip install --upgrade Cython
   - &build_package python setup.py bdist_wheel
   - &install_built pip install exec_helpers --no-index -f dist
-  - &test_no_cov  py.test -vv test
+  - &test_no_cov  py.test -vvv test
   - &test_cythonized
     stage: Test cythonized
     install:
@@ -52,8 +52,8 @@ _helpers:
     after_success: skip
 
 script:
-  - pip install -e .
-  - py.test -vv --cov-config .coveragerc --cov-report= --cov=exec_helpers test
+  - python setup.py develop -v
+  - py.test -vvv --cov-config .coveragerc --cov-report= --cov=exec_helpers test
   - coverage report -m --fail-under 87
 after_success:
   - coveralls

tox.ini

@@ -11,7 +11,7 @@ skip_missing_interpreters = True
 
 [testenv]
 recreate = True
-usedevelop = True
+usedevelop = False
 passenv = http_proxy HTTP_PROXY https_proxy HTTPS_PROXY no_proxy NO_PROXY
 setev = PYTHONDONTWRITEBYTECODE=1
 deps =
@@ -23,30 +23,34 @@ deps =
   pytest-cov
   pytest-html
   pytest-sugar
-  py{35,36,37}-nocov: Cython
+  py3{5,6,7,8}-nocov: Cython
   -r{toxinidir}/CI_REQUIREMENTS.txt
 
 commands =
   pip freeze
+  python setup.py develop -v
   py.test --junitxml=unit_result.xml --cov-report html --self-contained-html --html=report.html --cov-config .coveragerc --cov=exec_helpers {posargs:test}
   coverage report --fail-under 97
 
 [testenv:py35-nocov]
-usedevelop = False
 commands =
   python setup.py bdist_wheel
   pip install exec_helpers --no-index -f dist
   py.test -vvv {posargs:test}
 
 [testenv:py36-nocov]
-usedevelop = False
 commands =
   python setup.py bdist_wheel
   pip install exec_helpers --no-index -f dist
   py.test -vvv {posargs:test}
 
 [testenv:py37-nocov]
-usedevelop = False
+commands =
+  python setup.py bdist_wheel
+  pip install exec_helpers --no-index -f dist
+  py.test -vvv {posargs:test}
+
+[testenv:py38-nocov]
 commands =
   python setup.py bdist_wheel
   pip install exec_helpers --no-index -f dist
@@ -60,29 +64,24 @@ deps =
   flake8
   flake8-bugbear
 
-usedevelop = False
 commands = flake8
 
 [testenv:pep257]
 deps =
   pydocstyle
-usedevelop = False
 commands = pydocstyle -v exec_helpers
 
 [testenv:doc8]
 deps =
   doc8
   Pygments
-usedevelop = False
 commands = doc8 README.rst doc/source
 
 [testenv:install]
 deps =
-usedevelop = False
 commands = pip install ./ -vvv -U
 
 [testenv:pylint]
-usedevelop = False
 deps =
   pylint>=2.3
   isort[pyproject,requirements]
@@ -101,7 +100,6 @@ commands = bandit -r exec_helpers
 [testenv:black]
 deps =
   black
-usedevelop = False
 commands =
   black exec_helpers
 
@@ -122,6 +120,5 @@ commands = mypy --strict --xslt-html-report mypy_report -p exec_helpers
 [testenv:isort]
 deps =
   isort[pyproject,requirements]
-usedevelop = False
 commands =
   isort -rc exec_helpers