Move requirement files to tools/requirements/

tox.ini

@@ -15,10 +15,10 @@ setenv =
     # This is required in order to get UTF-8 output inside of the subprocesses
     # that our tests use.
     LC_CTYPE = en_US.UTF-8
-deps = -r{toxinidir}/tools/tests-requirements.txt
+deps = -r{toxinidir}/tools/requirements/tests.txt
 commands_pre =
 	python -c 'import shutil, sys; shutil.rmtree(sys.argv[1], ignore_errors=True)' {toxinidir}/tests/data/common_wheels
-	{[helpers]pip} wheel -w {toxinidir}/tests/data/common_wheels -r {toxinidir}/tools/tests-common_wheels-requirements.txt
+	{[helpers]pip} wheel -w {toxinidir}/tests/data/common_wheels -r {toxinidir}/tools/requirements/tests-common_wheels.txt
 commands = pytest --timeout 300 []
 install_command = {[helpers]pip} install {opts} {packages}
 list_dependencies_command = {[helpers]pip} freeze --all
@@ -29,7 +29,7 @@ commands = pytest --timeout 300 --cov=pip --cov-report=term-missing --cov-report
 
 [testenv:docs]
 # Don't skip install here since pip_sphinxext uses pip's internals.
-deps = -r{toxinidir}/tools/docs-requirements.txt
+deps = -r{toxinidir}/tools/requirements/docs.txt
 basepython = python3.6
 commands =
     sphinx-build -W -d {envtmpdir}/doctrees/html -b html docs/html docs/build/html
@@ -50,7 +50,7 @@ commands =
     python setup.py check -m -r -s
 
 [lint]
-deps = -r{toxinidir}/tools/lint-requirements.txt
+deps = -r{toxinidir}/tools/requirements/lint.txt
 
 [testenv:lint-py2]
 skip_install = True
@@ -74,7 +74,7 @@ commands =
 [testenv:mypy]
 skip_install = True
 basepython = python3
-deps = -r{toxinidir}/tools/mypy-requirements.txt
+deps = -r{toxinidir}/tools/requirements/mypy.txt
 commands_pre =
 commands =
     mypy src