build: don't install multiple .pip files

If .pip files are pip-compile'd separately, they can have different
pinned versions.  Then when installed together, pip can't resolve the
difference.  Instead, pip-compile multiple .in files to produce one .pip
file that is installed.

Makefile

@@ -86,6 +86,7 @@ upgrade: 				## Update the *.pip files with the latest packages satisfying *.in
 	$(PIP_COMPILE) -o requirements/dev.pip requirements/dev.in
 	$(PIP_COMPILE) -o requirements/light-threads.pip requirements/light-threads.in
 	$(PIP_COMPILE) -o doc/requirements.pip doc/requirements.in
+	$(PIP_COMPILE) -o requirements/lint.pip doc/requirements.in requirements/dev.in
 
 
 ##@ Pre-builds for prepping the code

requirements/lint.pip

@@ -0,0 +1,302 @@
+#
+# This file is autogenerated by pip-compile with python 3.7
+# To update, run:
+#
+#    make upgrade
+#
+alabaster==0.7.12
+    # via sphinx
+astroid==2.11.7
+    # via pylint
+attrs==22.1.0
+    # via
+    #   -r requirements/pytest.pip
+    #   hypothesis
+    #   pytest
+babel==2.10.3
+    # via sphinx
+backports-functools-lru-cache==1.6.4
+    # via
+    #   -r requirements/pytest.pip
+    #   pycontracts
+bleach==5.0.1
+    # via readme-renderer
+build==0.8.0
+    # via check-manifest
+certifi==2022.6.15
+    # via requests
+charset-normalizer==2.1.0
+    # via requests
+check-manifest==0.48
+    # via -r requirements/dev.in
+cogapp==3.3.0
+    # via
+    #   -r doc/requirements.in
+    #   -r requirements/dev.in
+colorama==0.4.5
+    # via sphinx-autobuild
+commonmark==0.9.1
+    # via rich
+decorator==5.1.1
+    # via
+    #   -r requirements/pytest.pip
+    #   pycontracts
+dill==0.3.5.1
+    # via pylint
+distlib==0.3.5
+    # via
+    #   -r requirements/pip.pip
+    #   virtualenv
+docutils==0.17.1
+    # via
+    #   readme-renderer
+    #   sphinx
+    #   sphinx-rtd-theme
+exceptiongroup==1.0.0rc8
+    # via
+    #   -r requirements/pytest.pip
+    #   hypothesis
+execnet==1.9.0
+    # via
+    #   -r requirements/pytest.pip
+    #   pytest-xdist
+filelock==3.8.0
+    # via
+    #   -r requirements/pip.pip
+    #   tox
+    #   virtualenv
+flaky==3.7.0
+    # via -r requirements/pytest.pip
+future==0.18.2
+    # via
+    #   -r requirements/pytest.pip
+    #   pycontracts
+greenlet==1.1.2
+    # via -r requirements/dev.in
+hypothesis==6.54.3
+    # via -r requirements/pytest.pip
+idna==3.3
+    # via requests
+imagesize==1.4.1
+    # via sphinx
+importlib-metadata==4.12.0
+    # via
+    #   -r requirements/pip.pip
+    #   -r requirements/pytest.pip
+    #   build
+    #   keyring
+    #   pluggy
+    #   pytest
+    #   sphinx
+    #   sphinxcontrib-spelling
+    #   tox
+    #   twine
+    #   virtualenv
+iniconfig==1.1.1
+    # via
+    #   -r requirements/pytest.pip
+    #   pytest
+isort==5.10.1
+    # via pylint
+jedi==0.18.1
+    # via pudb
+jinja2==3.1.2
+    # via sphinx
+keyring==23.8.2
+    # via twine
+lazy-object-proxy==1.7.1
+    # via astroid
+libsass==0.21.0
+    # via -r requirements/dev.in
+livereload==2.6.3
+    # via sphinx-autobuild
+markupsafe==2.1.1
+    # via jinja2
+mccabe==0.7.0
+    # via pylint
+packaging==21.3
+    # via
+    #   -r requirements/pytest.pip
+    #   build
+    #   pudb
+    #   pytest
+    #   sphinx
+    #   tox
+parso==0.8.3
+    # via jedi
+pep517==0.13.0
+    # via build
+pkginfo==1.8.3
+    # via twine
+platformdirs==2.5.2
+    # via
+    #   -r requirements/pip.pip
+    #   pylint
+    #   virtualenv
+pluggy==1.0.0
+    # via
+    #   -r requirements/pytest.pip
+    #   pytest
+    #   tox
+pudb==2022.1.2
+    # via -r requirements/dev.in
+py==1.11.0
+    # via
+    #   -r requirements/pytest.pip
+    #   pytest
+    #   pytest-forked
+    #   tox
+pycontracts @ git+https://github.com/slorg1/contracts@collections_and_validator
+    # via -r requirements/pytest.pip
+pyenchant==3.2.2
+    # via
+    #   -r doc/requirements.in
+    #   sphinxcontrib-spelling
+pygments==2.12.0
+    # via
+    #   pudb
+    #   readme-renderer
+    #   rich
+    #   sphinx
+pylint==2.14.5
+    # via -r requirements/dev.in
+pyparsing==3.0.9
+    # via
+    #   -r requirements/pytest.pip
+    #   packaging
+    #   pycontracts
+pytest==7.1.2
+    # via
+    #   -r requirements/pytest.pip
+    #   pytest-forked
+    #   pytest-xdist
+pytest-forked==1.4.0
+    # via
+    #   -r requirements/pytest.pip
+    #   pytest-xdist
+pytest-xdist==2.5.0
+    # via -r requirements/pytest.pip
+pytz==2022.2.1
+    # via babel
+qualname==0.1.0
+    # via
+    #   -r requirements/pytest.pip
+    #   pycontracts
+readme-renderer==36.0
+    # via
+    #   -r requirements/dev.in
+    #   twine
+requests==2.28.1
+    # via
+    #   -r requirements/dev.in
+    #   requests-toolbelt
+    #   sphinx
+    #   twine
+requests-toolbelt==0.9.1
+    # via twine
+rfc3986==2.0.0
+    # via twine
+rich==12.5.1
+    # via twine
+six==1.16.0
+    # via
+    #   -r requirements/pytest.pip
+    #   bleach
+    #   libsass
+    #   livereload
+    #   pycontracts
+    #   tox
+snowballstemmer==2.2.0
+    # via sphinx
+sortedcontainers==2.4.0
+    # via
+    #   -r requirements/pytest.pip
+    #   hypothesis
+sphinx==5.1.1
+    # via
+    #   -r doc/requirements.in
+    #   sphinx-autobuild
+    #   sphinx-rtd-theme
+    #   sphinxcontrib-restbuilder
+    #   sphinxcontrib-spelling
+sphinx-autobuild==2021.3.14
+    # via -r doc/requirements.in
+sphinx-rtd-theme==1.0.0
+    # via -r doc/requirements.in
+sphinxcontrib-applehelp==1.0.2
+    # via sphinx
+sphinxcontrib-devhelp==1.0.2
+    # via sphinx
+sphinxcontrib-htmlhelp==2.0.0
+    # via sphinx
+sphinxcontrib-jsmath==1.0.1
+    # via sphinx
+sphinxcontrib-qthelp==1.0.3
+    # via sphinx
+sphinxcontrib-restbuilder==0.3
+    # via -r doc/requirements.in
+sphinxcontrib-serializinghtml==1.1.5
+    # via sphinx
+sphinxcontrib-spelling==7.6.0
+    # via -r doc/requirements.in
+toml==0.10.2
+    # via tox
+tomli==2.0.1
+    # via
+    #   -r requirements/pytest.pip
+    #   build
+    #   check-manifest
+    #   pylint
+    #   pytest
+tomlkit==0.11.4
+    # via pylint
+tornado==6.2
+    # via livereload
+tox==3.25.1
+    # via -r requirements/dev.in
+twine==4.0.1
+    # via -r requirements/dev.in
+typed-ast==1.5.4
+    # via astroid
+typing-extensions==4.3.0
+    # via
+    #   -r requirements/pip.pip
+    #   -r requirements/pytest.pip
+    #   astroid
+    #   importlib-metadata
+    #   pylint
+    #   rich
+urllib3==1.26.11
+    # via
+    #   requests
+    #   twine
+urwid==2.1.2
+    # via
+    #   pudb
+    #   urwid-readline
+urwid-readline==0.13
+    # via pudb
+virtualenv==20.16.3
+    # via
+    #   -r requirements/pip.pip
+    #   tox
+webencodings==0.5.1
+    # via bleach
+wrapt==1.14.1
+    # via astroid
+zipp==3.8.1
+    # via
+    #   -r requirements/pip.pip
+    #   -r requirements/pytest.pip
+    #   importlib-metadata
+
+# The following packages are considered to be unsafe in a requirements file:
+pip==22.0.4
+    # via
+    #   -c doc/../requirements/pins.pip
+    #   -c requirements/pins.pip
+    #   -r requirements/pip.pip
+setuptools==65.0.0
+    # via
+    #   astroid
+    #   check-manifest

tox.ini

@@ -70,8 +70,7 @@ commands =
 
 [testenv:lint]
 deps =
-    -r requirements/dev.pip
-    -r doc/requirements.pip
+    -r requirements/lint.pip
 
 setenv =
     LINTABLE = coverage tests doc ci igor.py setup.py __main__.py