Pin all CI jobs to Rust 1.94.0 via rust-toolchain.toml

Remove MSRV matrix (1.64.0, 1.71.1) and stable/beta variants — this
fork requires 1.94.0 (LazyLock, modern SIMD APIs). All jobs now rely on
rust-toolchain.toml which declares channel + components (clippy, rustfmt).

Jobs that genuinely need nightly (miri, cargo-careful, docs) keep
dtolnay/rust-toolchain@nightly. Everything else uses the repo-pinned
toolchain directly.

Co-authored-by: AdaWorldAPI <AdaWorldAPI@users.noreply.github.com>

Author: cursoragent

.github/workflows/ci.yaml

@@ -15,104 +15,51 @@ env:
   HOST: x86_64-unknown-linux-gnu
   FEATURES: "approx,serde,rayon"
   RUSTFLAGS: "-D warnings -C target-cpu=x86-64-v3"
-  MSRV: 1.64.0
-  BLAS_MSRV: 1.71.1
 
 jobs:
-  pass-msrv:
-    runs-on: ubuntu-latest
-    name: Pass MSRV values to other jobs
-    outputs:
-      MSRV: ${{ env.MSRV }}
-      BLAS_MSRV: ${{ env.BLAS_MSRV }}
-    steps:
-      - name: Pass MSRV
-        run: |
-          echo "MSRV=${{ env.MSRV }}" >> $GITHUB_OUTPUT
-          echo "BLAS_MSRV=${{ env.BLAS_MSRV }}" >> $GITHUB_OUTPUT
-
   clippy:
     runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        rust:
-          - stable
-    name: clippy/${{ matrix.rust }}
+    name: clippy/1.94.0
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@master
-        with:
-          toolchain: ${{ matrix.rust }}
-          components: clippy
-      # rust-toolchain.toml pins 1.94.0 — install clippy for that toolchain too,
-      # since dtolnay/rust-toolchain only installs for the requested matrix value.
-      - run: rustup component add clippy --toolchain 1.94.0 || true
       - uses: Swatinem/rust-cache@v2
       - run: cargo clippy --features approx,serde,rayon -- -D warnings
       - run: cargo clippy --features native -- -D warnings
 
   format:
     runs-on: ubuntu-latest
-    name: format/stable
+    name: format/1.94.0
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@stable
-        with:
-          components: rustfmt
-      # rust-toolchain.toml pins 1.94.0 — install rustfmt for that toolchain too.
-      - run: rustup component add rustfmt --toolchain 1.94.0 || true
       - run: cargo fmt --all --check
 
   nostd:
     runs-on: ubuntu-latest
-    continue-on-error: ${{ matrix.experimental }}
-    strategy:
-      matrix:
-        include:
-          - rust: stable
-            experimental: false
-            target: thumbv6m-none-eabi
-
-    name: nostd/${{ matrix.target }}/${{ matrix.rust }}
+    name: nostd/thumbv6m-none-eabi/1.94.0
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@stable
-        with:
-          toolchain: ${{ matrix.rust }}
-          targets: ${{ matrix.target }}
-      - name: Tests
+      - run: rustup target add thumbv6m-none-eabi
+      - name: Build no_std
         run: |
-          cargo rustc "--target=${{ matrix.target }}" --no-default-features --features portable-atomic-critical-section
+          cargo rustc "--target=thumbv6m-none-eabi" --no-default-features --features portable-atomic-critical-section
 
   tests:
     runs-on: ubuntu-latest
-    needs: pass-msrv
-    strategy:
-      matrix:
-        rust:
-          - stable
-          - beta
-          - ${{ needs.pass-msrv.outputs.MSRV }}
-
-    name: tests/${{ matrix.rust }}
+    name: tests/1.94.0
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@master
-        with:
-          toolchain: ${{ matrix.rust }}
       - uses: rui314/setup-mold@v1
       - uses: Swatinem/rust-cache@v2
       - uses: taiki-e/install-action@nextest
       - name: Install openblas
         run: sudo apt-get install libopenblas-dev gfortran
-      - run: ./scripts/all-tests.sh "$FEATURES" ${{ matrix.rust }}
-    
+      - run: ./scripts/all-tests.sh "$FEATURES" 1.94.0
+
   native-backend:
     runs-on: ubuntu-latest
-    name: native-backend/stable
+    name: native-backend/1.94.0
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@stable
       - uses: Swatinem/rust-cache@v2
       - uses: taiki-e/install-action@nextest
       - name: Build native backend
@@ -122,21 +69,17 @@ jobs:
       - name: Test native + approx
         run: cargo nextest run -p ndarray --features native,approx
 
-  blas-msrv:
+  blas-integ:
     runs-on: ubuntu-latest
-    name: blas-msrv
-    needs: pass-msrv
+    name: blas-integ/1.94.0
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@master
-        with:
-          toolchain: ${{ needs.pass-msrv.outputs.BLAS_MSRV }}
       - uses: rui314/setup-mold@v1
       - uses: Swatinem/rust-cache@v2
       - uses: taiki-e/install-action@nextest
       - name: Install openblas
         run: sudo apt-get install libopenblas-dev gfortran
-      - run: ./scripts/blas-integ-tests.sh $BLAS_MSRV
+      - run: ./scripts/blas-integ-tests.sh 1.94.0
 
   miri:
     # Nightly-only. Cannot run SIMD intrinsics or FFI.
@@ -154,28 +97,22 @@ jobs:
       - run: ./scripts/miri-tests.sh
 
   cross_test:
-    #if: ${{ github.event_name == 'merge_group' }}
     runs-on: ubuntu-latest
     strategy:
       matrix:
         include:
-          - rust: stable
-            target: s390x-unknown-linux-gnu
-          - rust: stable
-            target: i686-unknown-linux-gnu
+          - target: s390x-unknown-linux-gnu
+          - target: i686-unknown-linux-gnu
 
-    name: cross_test/${{ matrix.target }}/${{ matrix.rust }}
+    name: cross_test/${{ matrix.target }}/1.94.0
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@master
-        with:
-          toolchain: ${{ matrix.rust }}
-          targets: ${{ matrix.target }}
+      - run: rustup target add ${{ matrix.target }}
       - uses: rui314/setup-mold@v1
       - uses: Swatinem/rust-cache@v2
       - name: Install cross
         run: cargo install cross
-      - run: ./scripts/cross-tests.sh "approx,serde,rayon" ${{ matrix.rust }} ${{ matrix.target }}
+      - run: ./scripts/cross-tests.sh "approx,serde,rayon" 1.94.0 ${{ matrix.target }}
 
   cargo-careful:
     # Nightly-only. Only runs on merge queue / push — never blocks PR checks.
@@ -210,6 +147,7 @@ jobs:
       - nostd
       - tests
       - native-backend
+      - blas-integ
       - miri
       - cross_test
       - cargo-careful