Restore comment as not a comment

.github/workflows/ci.yml

@@ -17,14 +17,14 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, macos-latest, windows-latest, windows-11-arm, ubuntu-24.04-arm]
+        os: [ubuntu-latest, macos-latest, windows-latest, windows-11-arm, ubuntu-22.04-arm]
         rust: [nightly, beta, stable, 1.62.0, stable 18 months ago, stable minus 8 releases]
         include:
           - os: ubuntu-latest
             rust: 1.0.0
     timeout-minutes: 45
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v4
       - uses: ./
         name: Run dtolnay/rust-toolchain${{contains(matrix.rust, ' ') && ' for ' || '@'}}${{matrix.rust}}
         id: toolchain

README.md

@@ -16,7 +16,7 @@ jobs:
     name: cargo test
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@stable
       - run: cargo test --all-features
 ```

action.yml

@@ -6,6 +6,9 @@ branding:
   color: purple
 
 inputs:
+  toolchain:
+    description: Rust toolchain specification -- see https://rust-lang.github.io/rustup/concepts/toolchains.html#toolchain-specification
+    required: true
   targets:
     description: Comma-separated list of target triples to install for this toolchain
     required: false
@@ -31,7 +34,7 @@ runs:
       run: |
         : parse toolchain version
         if [[ -z $toolchain ]]; then
-          # GitHub does not enforce `required: true` inputs itself. https://github.com/actions/runner/issues/1070
+          : GitHub does not enforce 'required: true' inputs itself. https://github.com/actions/runner/issues/1070
           echo "'toolchain' is a required input" >&2
           exit 1
         elif [[ $toolchain =~ ^stable' '[0-9]+' '(year|month|week|day)s?' 'ago$ ]]; then
@@ -48,7 +51,7 @@ runs:
           echo "toolchain=$toolchain" >> $GITHUB_OUTPUT
         fi
       env:
-        toolchain: 1.58.1
+        toolchain: ${{inputs.toolchain}}
       shell: bash
 
     - id: flags
@@ -88,8 +91,6 @@ runs:
 
     - name: rustup toolchain install ${{steps.parse.outputs.toolchain}}
       run: rustup toolchain install ${{steps.parse.outputs.toolchain}}${{steps.flags.outputs.targets}}${{steps.flags.outputs.components}} --profile minimal${{steps.flags.outputs.downgrade}} --no-self-update
-      env:
-        RUSTUP_PERMIT_COPY_RENAME: 1
       shell: bash
 
     - run: rustup default ${{steps.parse.outputs.toolchain}}

scripts/update-revs.sh

@@ -11,7 +11,7 @@ patch_releases=(
     1.12.1 1.15.1 1.22.1 1.24.1 1.26.1 1.26.2 1.27.1 1.27.2 1.29.1 1.29.2 1.30.1
     1.31.1 1.34.1 1.34.2 1.41.1 1.43.1 1.44.1 1.45.1 1.45.2 1.52.1 1.56.1 1.58.1
     1.62.1 1.66.1 1.67.1 1.68.1 1.68.2 1.71.1 1.72.1 1.74.1 1.77.1 1.77.2 1.80.1
-    1.84.1 1.85.1 1.91.1 1.93.1 1.94.1
+    1.84.1 1.85.1
 )
 
 releases() {
@@ -33,7 +33,7 @@ for rev in `releases` stable beta nightly; do
     if [[ $rev == 1* ]]; then
         sed -i "/^  toolchain:/,+2d; s/\${{inputs\.toolchain}}/$rev/" action.yml
     else
-        sed -i "s/^    required: true$/    required: false\n    default: $rev/" action.yml
+        sed -i "s/required: true/required: false\n    default: $rev/" action.yml
     fi
     git add action.yml
     git commit --quiet --message "toolchain: $rev"