Add force-non-host setting to allow installing non-host toolchains

.github/workflows/tests.yml

@@ -10,7 +10,7 @@ on:
       - main
 
 jobs:
-  tests:
+  test-linux:
     runs-on: ubuntu-latest
 
     strategy:
@@ -39,3 +39,34 @@ jobs:
       - run: cargo fmt --check
       - run: cargo check
       - run: cargo build --release
+
+  test-windows:
+    runs-on: windows-latest
+
+    strategy:
+      matrix:
+        toolchain:
+          - stable-x86_64-pc-windows-msvc
+          - stable-i686-pc-windows-msvc
+        use-cache:
+          - true
+          - false
+
+    defaults:
+      run:
+        working-directory: tests
+
+    steps:
+      - uses: actions/checkout@v6
+
+      - uses: ./
+        with:
+          toolchain: ${{ matrix.toolchain }}
+          force-non-host: true
+          use-cache: ${{ matrix.use-cache }}
+          components: rustfmt
+          workspaces: tests
+
+      - run: cargo fmt --check
+      - run: cargo check
+      - run: cargo build --release

action.yml

@@ -13,6 +13,10 @@ inputs:
   components:
     description: Comma separated list of additional components.
     required: false
+  force-non-host:
+    description: Allow non-host toolchain to be installed.
+    default: false
+    required: false
   use-cache:
     description: Use rust-cache.
     default: true
@@ -33,13 +37,24 @@ runs:
         if [[ -n "$COMPONENTS" ]]; then
           set -- "$@" --component "$COMPONENTS"
         fi
+        if "$FORCE_NON_HOST"; then
+          set -- "$@" --force-non-host
+        fi
         set -x
         rustup toolchain install "$@" --no-self-update
-        rustup default "$TOOLCHAIN"
+
+        set +x
+        set -- "$TOOLCHAIN"
+        if "$FORCE_NON_HOST"; then
+          set -- "$@" --force-non-host
+        fi
+        set -x
+        rustup default "$@"
       env:
         TOOLCHAIN: ${{ inputs.toolchain }}
         PROFILE: ${{ inputs.profile }}
         COMPONENTS: ${{ inputs.components }}
+        FORCE_NON_HOST: ${{ case(inputs.force-non-host == 'true', 'true', 'false') }}
       shell: bash
 
     - uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # v2.8.1