CI: Replace deprecated/unmaintained actions-rs with simple run: steps (#92)

The `actions-rs` containers haven't been maintained and updated for
years and don't need to: GitHub's actions environment already comes
fully loaded with a complete stable Rust installation with the standard
tools (clippy, rustfmt, rustdoc).  Simple `run:` commands relate
directly to what a developer can type in locally to "reproduce" the
CI environment while they might be following up on CI failures, and no
longer spam ancient Node 12 deprecation warnings.

Author: MarijnS95

.github/workflows/ci.yml

@@ -11,98 +11,47 @@ jobs:
     steps:
       - run: sudo apt-get install libv4l-dev
       - uses: actions/checkout@v4
-      - uses: actions-rs/toolchain@v1
-        with:
-          profile: minimal
-          toolchain: stable
-          override: true
-      - uses: actions-rs/cargo@v1
-        name: Check `v4l2`
-        with:
-          command: check
-          args: --workspace --all-targets
-      - uses: actions-rs/cargo@v1
-        name: Check `libv4l`
-        with:
-          command: check
-          args: --workspace --all-targets --no-default-features --features libv4l
+      - name: Check `v4l2`
+        run: cargo check --workspace --all-targets
+      - name: Check `libv4l`
+        run: cargo check --workspace --all-targets --no-default-features --features libv4l
 
   test:
     name: Test
     runs-on: ubuntu-20.04
     steps:
       - run: sudo apt-get install libv4l-dev
       - uses: actions/checkout@v4
-      - uses: actions-rs/toolchain@v1
-        with:
-          profile: minimal
-          toolchain: stable
-          override: true
       - name: Test all targets
-        uses: actions-rs/cargo@v1
-        with:
-          command: test
-          args: --workspace --all-targets
+        run: cargo test --workspace --all-targets
       - name: Test docs
-        uses: actions-rs/cargo@v1
-        with:
-          command: test
-          args: --workspace --doc
+        run: cargo test --workspace --doc
 
   fmt:
     name: Rustfmt
     runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v4
-      - uses: actions-rs/toolchain@v1
-        with:
-          profile: minimal
-          toolchain: stable
-          override: true
-          components: rustfmt
-      - uses: actions-rs/cargo@v1
-        with:
-          command: fmt
-          args: --all -- --check
+      - run: cargo fmt --all -- --check
 
   clippy:
     name: Clippy
     runs-on: ubuntu-20.04
     steps:
       - run: sudo apt-get install libv4l-dev
       - uses: actions/checkout@v4
-      - uses: actions-rs/toolchain@v1
-        with:
-          profile: minimal
-          toolchain: stable
-          override: true
-          components: clippy
-      - uses: actions-rs/cargo@v1
-        name: Clippy lint `v4l2`
-        with:
-          command: clippy
-          args: --workspace --all-targets -- -D warnings
-      - uses: actions-rs/cargo@v1
-        name: Clippy lint `libv4l`
-        with:
-          command: clippy
-          args: --workspace --all-targets --no-default-features --features libv4l -- -D warnings
+      - name: Clippy lint `v4l2`
+        run: cargo clippy --workspace --all-targets -- -D warnings
+      - name: Clippy lint `libv4l`
+        run: cargo clippy --workspace --all-targets --no-default-features --features libv4l -- -D warnings
 
   docs:
     name: Build-test docs
     runs-on: ubuntu-20.04
     steps:
       - run: sudo apt-get install libv4l-dev
       - uses: actions/checkout@v4
-      - uses: actions-rs/toolchain@v1
-        with:
-          profile: minimal
-          toolchain: stable
-          override: true
-      - uses: actions-rs/cargo@v1
-        name: Document all crates
+      - name: Document all crates
         env:
           RUSTDOCFLAGS: -Dwarnings
-        with:
-          command: doc
-          args: --workspace --no-deps --document-private-items
+        run: cargo doc --workspace --no-deps --document-private-items