ci: test builder feature

.github/workflows/_build-rust.yml

@@ -80,27 +80,27 @@ jobs:
           key: ${{ runner.os }}-rust-${{ inputs.rust-version }}-cargo-${{ hashFiles('**/Cargo.toml', '**/Cargo.lock') }}
       - run: cargo version
       - name: Build (library)
-        run: cargo build --target ${{ inputs.rust-target }} --features ${{ inputs.features }}
+        run: cargo build --target ${{ inputs.rust-target }} --features ${{ inputs.features }} --no-default-features
       - name: Build (all targets)
-        run: cargo build --all-targets --features ${{ inputs.features }}
+        run: cargo build --all-targets --features ${{ inputs.features }} --no-default-features
       - name: Code Formatting
         if: inputs.do-style-check
         run: cargo fmt --all -- --check
       - name: Code Style and Doc Style
         if: inputs.do-style-check
         run: |
-          cargo doc --document-private-items --features ${{ inputs.features }}
-          cargo clippy --all-targets --features ${{ inputs.features }}
+          cargo doc --document-private-items --features ${{ inputs.features }} --no-default-features
+          cargo clippy --all-targets --features ${{ inputs.features }} --no-default-features
       - name: Unit Test (UNIX)
         if: inputs.do-test && runner.os != 'Windows'
         run: |
           curl -LsSf https://get.nexte.st/latest/linux | tar zxf -
           chmod u+x cargo-nextest
-          ./cargo-nextest nextest run --features ${{ inputs.features }}
+          ./cargo-nextest nextest run --features ${{ inputs.features }} --no-default-features
       - name: Unit Test (Windows)
         if: inputs.do-test && runner.os == 'Windows'
         run: |
           Invoke-WebRequest https://get.nexte.st/latest/windows -OutFile cargo-nextest.zip
           Expand-Archive .\cargo-nextest.zip
           cp .\cargo-nextest/cargo-nextest.exe .
-          .\cargo-nextest.exe nextest run --features ${{ inputs.features }}
+          .\cargo-nextest.exe nextest run --features ${{ inputs.features }} --no-default-features

.github/workflows/rust.yml

@@ -22,6 +22,7 @@ jobs:
     with:
       rust-version: 1.56.1
       do-style-check: false
+      features: builder
 
   build_stable:
     name: build (stable)
@@ -29,6 +30,7 @@ jobs:
     with:
       rust-version: stable
       do-style-check: false
+      features: builder
 
   build_nightly:
     name: build (nightly)
@@ -36,7 +38,7 @@ jobs:
     with:
       rust-version: nightly
       do-style-check: false
-      features: unstable
+      features: builder,unstable
 
   ### no-std Build   #########################
   build_nostd_msrv:
@@ -47,6 +49,7 @@ jobs:
       rust-version: 1.56.1
       do-style-check: false
       rust-target: thumbv7em-none-eabihf
+      features: builder
 
   build_nostd_stable:
     name: build no_std (stable)
@@ -56,6 +59,17 @@ jobs:
       rust-version: stable
       do-style-check: false
       rust-target: thumbv7em-none-eabihf
+      features: builder
+
+  # Also tests the build one time without the "builder" feature.
+  build_nostd_stable_no_builder:
+    name: build no_std (stable) [w/o builder]
+    needs: build_stable
+    uses: ./.github/workflows/_build-rust.yml
+    with:
+      rust-version: stable
+      do-style-check: false
+      rust-target: thumbv7em-none-eabihf
 
   # We perform one single run also in Windows. This should be sufficient to
   # check that devs can also use this on Windows.
@@ -65,11 +79,12 @@ jobs:
     with:
       runs-on: windows-latest
       # Quirk for the Windows powershell and its handling of empty arguments.
-      features: >
-        '""'
+      # features: >
+      #   '""'
       rust-version: stable
       do-style-check: false
       rust-target: thumbv7em-none-eabihf
+      features: builder
 
   build_nostd_nightly:
     name: build no_std (nightly)
@@ -79,7 +94,7 @@ jobs:
       rust-version: nightly
       do-style-check: false
       rust-target: thumbv7em-none-eabihf
-      features: unstable
+      features: builder,unstable
 
   ### Style Checks + Doc #####################
   style_msrv:
@@ -90,6 +105,7 @@ jobs:
       rust-version: 1.56.1
       do-style-check: true
       do-test: false
+      features: builder
 
   style_stable:
     name: style (stable)
@@ -99,6 +115,7 @@ jobs:
       rust-version: stable
       do-style-check: true
       do-test: false
+      features: builder
 
   style_nightly:
     name: style (nightly)
@@ -108,4 +125,4 @@ jobs:
       rust-version: nightly
       do-style-check: true
       do-test: false
-      features: unstable
+      features: builder,unstable

multiboot2-header/Cargo.toml

@@ -27,6 +27,10 @@ homepage = "https://github.com/rust-osdev/multiboot2-header"
 repository = "https://github.com/rust-osdev/multiboot2"
 documentation = "https://docs.rs/multiboot2-header"
 
+[[example]]
+name = "minimal"
+required-features = ["builder"]
+
 [features]
 default = ["builder"]
 alloc = []