ci: move PYTHON_PKGS into pyproject.toml as a testing extra

Add a 'testing' optional-dependency group to pyproject.toml containing
pytest and pytest-asyncio, so the test environment can be installed on
any machine with 'pip install .[testing]'.

Update all three CI workflows to use the new extra instead of the
inline PYTHON_PKGS environment variable:

- tests.yml:    pip install .[testing] build
- test_ssh.yml: pip install .[testing,ssh] build
- test_ltx.yml: pip install .[testing,ltx]

Signed-off-by: Andrea Cervesato <andrea.cervesato@suse.com>

Author: acerv

.github/workflows/test_ltx.yml

@@ -3,9 +3,6 @@
 name: "Test LTX"
 on: [push, pull_request]
 
-env:
-  PYTHON_PKGS: pytest pytest-asyncio msgpack
-
 jobs:
   python3:
     runs-on: ubuntu-22.04
@@ -37,7 +34,7 @@ jobs:
         python-version: ${{ matrix.python-version }}
 
     - name: Install dependencies
-      run: pip install $PYTHON_PKGS
+      run: pip install .[testing,ltx]
 
     - name: Checkout ltx
       uses: actions/checkout@v5

.github/workflows/test_ssh.yml

@@ -4,7 +4,6 @@ name: "Test SSH"
 on: push
 
 env:
-  PYTHON_PKGS: pytest pytest-asyncio build asyncssh
   TEST_SSH_KEY_FILE: /home/runner/.ssh/id_rsa
   TEST_SSH_USERNAME: runner
   TEST_SSH_PASSWORD: password
@@ -41,7 +40,7 @@ jobs:
         python-version: ${{ matrix.python-version }}
 
     - name: Install dependencies
-      run: python3 -m pip install $PYTHON_PKGS
+      run: python3 -m pip install .[testing,ssh] build
 
     - name: Setup user password
       run: echo "$TEST_SSH_USERNAME:$TEST_SSH_PASSWORD" | sudo chpasswd

.github/workflows/tests.yml

@@ -3,9 +3,6 @@
 name: "Test packages"
 on: [push, pull_request]
 
-env:
-  PYTHON_PKGS: pytest pytest-asyncio build
-
 jobs:
   python3-deprecated:
     runs-on: ubuntu-22.04
@@ -24,7 +21,7 @@ jobs:
       run: zypper install -y python3-pip make
 
     - name: Install dependencies
-      run: pip install $PYTHON_PKGS
+      run: pip install pytest pytest-asyncio build
 
     - name: Build package
       run: python3 -m build
@@ -62,7 +59,7 @@ jobs:
         python-version: ${{ matrix.python-version }}
 
     - name: Install dependencies
-      run: python3 -m pip install $PYTHON_PKGS
+      run: python3 -m pip install .[testing] build
 
     - name: Build package
       run: python3 -m build

pyproject.toml

@@ -48,6 +48,7 @@ exclude = ["libkirk.tests"]
 kirk = "libkirk.main:run"
 
 [project.optional-dependencies]
+testing = ["pytest", "pytest-asyncio"]
 ssh = ["asyncssh <= 2.17.0"]
 ltx = ["msgpack <= 1.1.0"]
 docs = [