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@v7
+      - 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@v7
+      - 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
@@ -28,10 +31,10 @@ runs:
   using: composite
   steps:
     - id: parse
-      name: Parse toolchain version
       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
@@ -48,12 +51,12 @@ runs:
           echo "toolchain=$toolchain" >> $GITHUB_OUTPUT
         fi
       env:
-        toolchain: 1.66.1
+        toolchain: ${{inputs.toolchain}}
       shell: bash
 
     - id: flags
-      name: Construct rustup command line
       run: |
+        : construct rustup command line
         echo "targets=$(for t in ${targets//,/ }; do echo -n ' --target' $t; done)" >> $GITHUB_OUTPUT
         echo "components=$(for c in ${components//,/ }; do echo -n ' --component' $c; done)" >> $GITHUB_OUTPUT
         echo "downgrade=${{steps.parse.outputs.toolchain == 'nightly' && inputs.components && ' --allow-downgrade' || ''}}" >> $GITHUB_OUTPUT
@@ -62,12 +65,13 @@ runs:
         components: ${{inputs.components}}
       shell: bash
 
-    - name: Set $CARGO_HOME
-      run: echo CARGO_HOME=${CARGO_HOME:-"${{runner.os == 'Windows' && '$USERPROFILE\.cargo' || '$HOME/.cargo'}}"} >> $GITHUB_ENV
+    - run: |
+        : set $CARGO_HOME
+        echo CARGO_HOME=${CARGO_HOME:-"${{runner.os == 'Windows' && '$USERPROFILE\.cargo' || '$HOME/.cargo'}}"} >> $GITHUB_ENV
       shell: bash
 
-    - name: Install rustup if needed
-      run: |
+    - run: |
+        : install rustup if needed
         if ! command -v rustup &>/dev/null; then
           curl --proto '=https' --tlsv1.2 --retry 10 --retry-connrefused --location --silent --show-error --fail https://sh.rustup.rs | sh -s -- --default-toolchain none -y
           echo "$CARGO_HOME/bin" >> $GITHUB_PATH
@@ -75,8 +79,8 @@ runs:
       if: runner.os != 'Windows'
       shell: bash
 
-    - name: Install rustup if needed on windows
-      run: |
+    - run: |
+        : install rustup if needed on windows
         if ! command -v rustup &>/dev/null; then
           curl --proto '=https' --tlsv1.2 --retry 10 --retry-connrefused --location --silent --show-error --fail https://win.rustup.rs/${{runner.arch == 'ARM64' && 'aarch64' || 'x86_64'}} --output '${{runner.temp}}\rustup-init.exe'
           '${{runner.temp}}\rustup-init.exe' --default-toolchain none --no-modify-path -y
@@ -87,39 +91,36 @@ 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
 
-    - name: rustup default ${{steps.parse.outputs.toolchain}}
-      run: rustup default ${{steps.parse.outputs.toolchain}}
+    - run: rustup default ${{steps.parse.outputs.toolchain}}
       shell: bash
       continue-on-error: true  # https://github.com/dtolnay/rust-toolchain/issues/127
 
     - id: rustc-version
-      name: Create cachekey
       run: |
+        : create cachekey
         DATE=$(rustc +${{steps.parse.outputs.toolchain}} --version --verbose | sed -ne 's/^commit-date: \(20[0-9][0-9]\)-\([01][0-9]\)-\([0-3][0-9]\)$/\1\2\3/p')
         HASH=$(rustc +${{steps.parse.outputs.toolchain}} --version --verbose | sed -ne 's/^commit-hash: //p')
         echo "cachekey=$(echo $DATE$HASH | head -c12)" >> $GITHUB_OUTPUT
       shell: bash
 
-    - name: Disable incremental compilation
-      run: |
+    - run: |
+        : disable incremental compilation
         if [ -z "${CARGO_INCREMENTAL+set}" ]; then
           echo CARGO_INCREMENTAL=0 >> $GITHUB_ENV
         fi
       shell: bash
 
-    - name: Enable colors in Cargo output
-      run: |
+    - run: |
+        : enable colors in Cargo output
         if [ -z "${CARGO_TERM_COLOR+set}" ]; then
           echo CARGO_TERM_COLOR=always >> $GITHUB_ENV
         fi
       shell: bash
 
-    - name: Enable Cargo sparse registry
-      run: |
+    - run: |
+        : enable Cargo sparse registry
         # implemented in 1.66, stabilized in 1.68, made default in 1.70
         if [ -z "${CARGO_REGISTRIES_CRATES_IO_PROTOCOL+set}" -o -f "${{runner.temp}}"/.implicit_cargo_registries_crates_io_protocol ]; then
           if rustc +${{steps.parse.outputs.toolchain}} --version --verbose | grep -q '^release: 1\.6[89]\.'; then
@@ -132,14 +133,13 @@ runs:
         fi
       shell: bash
 
-    - name: Work around spurious network errors in curl 8.0
-      run: |
+    - run: |
+        : work around spurious network errors in curl 8.0
         # https://rust-lang.zulipchat.com/#narrow/stream/246057-t-cargo/topic/timeout.20investigation
         if rustc +${{steps.parse.outputs.toolchain}} --version --verbose | grep -q '^release: 1\.7[01]\.'; then
           echo CARGO_HTTP_MULTIPLEXING=false >> $GITHUB_ENV
         fi
       shell: bash
 
-    - name: rustc +${{steps.parse.outputs.toolchain}} --version --verbose
-      run: rustc +${{steps.parse.outputs.toolchain}} --version --verbose
+    - run: rustc +${{steps.parse.outputs.toolchain}} --version --verbose
       shell: bash

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 1.96.1 1.97.1
+    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"