cache ruby build

.github/workflows/book.yml

@@ -17,7 +17,14 @@ jobs:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 0
+      - name: Cache Ruby
+        id: cache-ruby
+        uses: actions/cache@v4
+        with:
+          path: rubies
+          key: ${{ runner.os }}-ruby
       - name: Install Ruby
+        if: steps.cache-ruby.outputs.cache-hit != 'true'
         env:
           CC: clang
         run: |
@@ -32,6 +39,10 @@ jobs:
           ../configure --without-shared --prefix=$prefix
           make install
           echo $prefix/bin >> $GITHUB_PATH
+      - name: Add Ruby to PATH
+        run: |
+          prefix=`pwd`/rubies/ruby-3.4
+          echo $prefix/bin >> $GITHUB_PATH
       - name: Install latest mdbook
         run: |
           tag=$(curl 'https://api.github.com/repos/rust-lang/mdbook/releases/latest' | jq -r '.tag_name')

.github/workflows/rust.yml

@@ -16,7 +16,14 @@ jobs:
       RUSTFLAGS: -D warnings
     steps:
       - uses: actions/checkout@v3
+      - name: Cache Ruby
+        id: cache-ruby
+        uses: actions/cache@v4
+        with:
+          path: rubies
+          key: ${{ runner.os }}-ruby
       - name: Install Ruby
+        if: steps.cache-ruby.outputs.cache-hit != 'true'
         env:
           CC: clang
         run: |
@@ -30,6 +37,9 @@ jobs:
           cd build
           ../configure --without-shared --prefix=$prefix
           make install
+      - name: Add Ruby to PATH
+        run: |
+          prefix=`pwd`/rubies/ruby-3.4
           echo $prefix/bin >> $GITHUB_PATH
       - name: Clippy
         run: cargo clippy --all-features --verbose -- -D warnings