Restructure CI with matrix approach and multi-feature support (#7376)

* `--features` flag can take multiple values

* Simplify CI job

* Remove bad default

* Enable jit on macOS

.github/workflows/ci.yaml

@@ -293,7 +293,10 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [macos-latest, ubuntu-latest, windows-2025]
+        os:
+        - macos-latest
+        - ubuntu-latest
+        - windows-2025
       fail-fast: false
     steps:
       - uses: actions/checkout@v6.0.2
@@ -302,18 +305,14 @@ jobs:
       - uses: actions/setup-python@v6.2.0
         with:
           python-version: ${{ env.PYTHON_VERSION }}
+
       - name: Set up the Mac environment
         run: brew install autoconf automake libtool openssl@3
         if: runner.os == 'macOS'
+
       - name: build rustpython
-        run: cargo build --release --verbose --features=threading ${{ env.CARGO_ARGS }}
-        if: runner.os == 'macOS'
-      - name: build rustpython
-        run: cargo build --release --verbose --features=threading ${{ env.CARGO_ARGS }},jit
-        if: runner.os != 'macOS'
-      - uses: actions/setup-python@v6.2.0
-        with:
-          python-version: ${{ env.PYTHON_VERSION }}
+        run: cargo build --release --verbose --features=threading,jit ${{ env.CARGO_ARGS }}
+
       - name: run snippets
         run: python -m pip install -r requirements.txt && pytest -v
         working-directory: ./extra_tests
@@ -445,14 +444,10 @@ jobs:
         run: |
           target/release/rustpython -m venv testvenv
           testvenv/bin/rustpython -m pip install wheel
-      - if: runner.os != 'macOS'
-        name: Check whats_left is not broken
+
+      - name: Check whats_left is not broken
         shell: bash
-        run: python -I scripts/whats_left.py --no-default-features --features "$(sed -e 's/--[^ ]*//g' <<< "${{ env.CARGO_ARGS }}" | tr -d '[:space:]'),threading,jit"
-      - if: runner.os == 'macOS' # TODO fix jit on macOS
-        name: Check whats_left is not broken (macOS)
-        shell: bash
-        run: python -I scripts/whats_left.py --no-default-features --features "$(sed -e 's/--[^ ]*//g' <<< "${{ env.CARGO_ARGS }}" | tr -d '[:space:]'),threading" # no jit on macOS for now
+        run: python -I scripts/whats_left.py ${{ env.CARGO_ARGS }} --features jit
 
   lint:
     name: Lint Rust & Python code

scripts/whats_left.py

@@ -67,9 +67,9 @@ def parse_args():
     )
     parser.add_argument(
         "--features",
-        action="store",
-        help="which features to enable when building RustPython (default: ssl)",
-        default="ssl",
+        action="append",
+        help="which features to enable when building RustPython (default: [])",
+        default=[],
     )
 
     args = parser.parse_args()
@@ -449,16 +449,20 @@ with open(GENERATED_FILE, "w", encoding="utf-8") as f:
 cargo_build_command = ["cargo", "build", "--release"]
 if args.no_default_features:
     cargo_build_command.append("--no-default-features")
+
+joined_features = ",".join(args.features)
 if args.features:
-    cargo_build_command.extend(["--features", args.features])
+    cargo_build_command.extend(["--features", joined_features])
 
 subprocess.run(cargo_build_command, check=True)
 
 cargo_run_command = ["cargo", "run", "--release"]
 if args.no_default_features:
     cargo_run_command.append("--no-default-features")
+
 if args.features:
-    cargo_run_command.extend(["--features", args.features])
+    cargo_run_command.extend(["--features", joined_features])
+
 cargo_run_command.extend(["-q", "--", GENERATED_FILE])
 
 result = subprocess.run(