Move from tox to Nox

.github/workflows/ci.yml

@@ -84,8 +84,8 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v2
 
-      - run: pip install vendoring
-      - run: vendoring sync . --verbose
+      - run: pip install nox
+      - run: nox -s vendoring
       - run: git diff --exit-code
 
   tests-unix:
@@ -121,17 +121,17 @@ jobs:
         if: matrix.os == 'MacOS'
         run: brew install bzr
 
-      - run: pip install tox 'virtualenv<20'
+      - run: pip install nox 'virtualenv<20'
 
       # Main check
       - name: Run unit tests
         run: >-
-          tox -e py --
+          nox -s test-${{ matrix.python }} --
           -m unit
           --verbose --numprocesses auto --showlocals
       - name: Run integration tests
         run: >-
-          tox -e py --
+          nox -s test-${{ matrix.python }} --
           -m integration
           --verbose --numprocesses auto --showlocals
           --durations=5
@@ -178,15 +178,15 @@ jobs:
           $acl.AddAccessRule($rule)
           Set-Acl "R:\Temp" $acl
 
-      - run: pip install tox 'virtualenv<20'
+      - run: pip install nox 'virtualenv<20'
         env:
           TEMP: "R:\\Temp"
 
       # Main check
       - name: Run unit tests
         if: matrix.group == 1
         run: >-
-          tox -e py --
+          nox -s test-${{ matrix.python }} --
           -m unit
           --verbose --numprocesses auto --showlocals
         env:
@@ -195,7 +195,7 @@ jobs:
       - name: Run integration tests (group 1)
         if: matrix.group == 1
         run: >-
-          tox -e py --
+          nox -s test-${{ matrix.python }} --
           -m integration -k "not test_install"
           --verbose --numprocesses auto --showlocals
         env:
@@ -204,7 +204,7 @@ jobs:
       - name: Run integration tests (group 2)
         if: matrix.group == 2
         run: >-
-          tox -e py --
+          nox -s test-${{ matrix.python }} --
           -m integration -k "test_install"
           --verbose --numprocesses auto --showlocals
         env:

docs/html/development/getting-started.rst

@@ -27,8 +27,8 @@ Development Environment
 pip is a command line application written in Python. For developing pip,
 you should `install Python`_ on your computer.
 
-For developing pip, you need to install :pypi:`tox`. Often, you can run
-``python -m pip install tox`` to install and use it.
+For developing pip, you need to install :pypi:`nox`. Often, you can run
+``python -m pip install nox`` to install and use it.
 
 
 Running pip From Source Tree
@@ -60,7 +60,7 @@ Running Tests
 =============
 
 pip's tests are written using the :pypi:`pytest` test framework and
-:mod:`unittest.mock`. :pypi:`tox` is used to automate the setup and execution
+:mod:`unittest.mock`. :pypi:`nox` is used to automate the setup and execution
 of pip's tests.
 
 It is preferable to run the tests in parallel for better experience during development,
@@ -70,29 +70,29 @@ To run tests:
 
 .. code-block:: console
 
-    $ tox -e py310 -- -n auto
+    $ nox -s test-3.10 -- -n auto
 
 To run tests without parallelization, run:
 
 .. code-block:: console
 
-    $ tox -e py310
+    $ nox -s test-3.10
 
 The example above runs tests against Python 3.10. You can also use other
-versions like ``py39`` and ``pypy3``.
+versions like ``3.9`` and ``pypy3``.
 
-``tox`` has been configured to forward any additional arguments it is given to
+``nox`` has been configured to forward any additional arguments it is given to
 ``pytest``. This enables the use of pytest's `rich CLI`_. As an example, you
 can select tests using the various ways that pytest provides:
 
 .. code-block:: console
 
     $ # Using file name
-    $ tox -e py310 -- tests/functional/test_install.py
+    $ nox -s test-3.10 -- tests/functional/test_install.py
     $ # Using markers
-    $ tox -e py310 -- -m unit
+    $ nox -s test-3.10 -- -m unit
     $ # Using keywords
-    $ tox -e py310 -- -k "install and not wheel"
+    $ nox -s test-3.10 -- -k "install and not wheel"
 
 Running pip's entire test suite requires supported version control tools
 (subversion, bazaar, git, and mercurial) to be installed. If you are missing
@@ -101,8 +101,8 @@ explicitly tell pytest to skip those tests:
 
 .. code-block:: console
 
-    $ tox -e py310 -- -k "not svn"
-    $ tox -e py310 -- -k "not (svn or git)"
+    $ nox -s test-3.10 -- -k "not svn"
+    $ nox -s test-3.10 -- -k "not (svn or git)"
 
 
 Running Linters
@@ -116,7 +116,7 @@ To use linters locally, run:
 
 .. code-block:: console
 
-    $ tox -e lint
+    $ nox -s lint
 
 .. note::
 
@@ -155,7 +155,7 @@ To build it locally, run:
 
 .. code-block:: console
 
-    $ tox -e docs
+    $ nox -s docs
 
 The built documentation can be found in the ``docs/build`` folder.
 

news/10693.process.rst

@@ -0,0 +1 @@
+Replace all our tox operations with Nox.

noxfile.py

@@ -65,9 +65,6 @@ def should_update_common_wheels() -> bool:
 
 # -----------------------------------------------------------------------------
 # Development Commands
-#   These are currently prototypes to evaluate whether we want to switch over
-#   completely to nox for all our automation. Contributors should prefer using
-#   `tox -e ...` until this note is removed.
 # -----------------------------------------------------------------------------
 @nox.session(python=["3.7", "3.8", "3.9", "3.10", "pypy3"])
 def test(session: nox.Session) -> None:
@@ -223,6 +220,21 @@ def pinned_requirements(path: Path) -> Iterator[Tuple[str, str]]:
         release.commit_file(session, ".", message=message)
 
 
+@nox.session
+def coverage(session: nox.Session) -> None:
+    if not os.path.exists("./.coverage-output"):
+        os.mkdir("./.coverage-output")
+    session.run(
+        "pytest",
+        "--cov=pip",
+        "--cov-config=./setup.cfg",
+        env={
+            "COVERAGE_OUTPUT_DIR": "./.coverage-output",
+            "COVERAGE_PROCESS_START": "./setup.cfg",
+        },
+    )
+
+
 # -----------------------------------------------------------------------------
 # Release Commands
 # -----------------------------------------------------------------------------