CI: iverilog setup as composite action

Called during setup-build-env.

.github/actions/setup-build-env/action.yml

@@ -5,6 +5,11 @@ inputs:
   runs-on:
     required: true
     type: string
+  get-iverilog:
+    description: 'Install iverilog'
+    default: false
+    required: false
+    type: boolean
 
 runs:
   using: composite
@@ -38,3 +43,9 @@ runs:
         echo "$(brew --prefix bison)/bin" >> $GITHUB_PATH
         echo "$(brew --prefix flex)/bin" >> $GITHUB_PATH
         echo "procs=$(sysctl -n hw.ncpu)" >> $GITHUB_ENV
+
+    - name: Setup iverilog
+      if: inputs.get-iverilog
+      uses: ./.github/actions/setup-iverilog
+      with:
+        runs-on: ${{ inputs.runs-on }}

.github/actions/setup-iverilog/action.yml

@@ -0,0 +1,57 @@
+name: iverilog setup
+description: Cached build and install of iverilog
+
+inputs:
+  runs-on:
+    required: true
+    type: string
+
+runs:
+  using: composite
+  steps:
+    - name: Get iverilog
+      id: get-iverilog
+      shell: bash
+      run: |
+        git clone https://github.com/steveicarus/iverilog.git
+        cd iverilog
+        echo "IVERILOG_GIT=$(git rev-parse HEAD)" >> $GITHUB_OUTPUT
+
+    - name: Get vcd2fst
+      shell: bash
+      run: |
+        git clone https://github.com/mmicko/libwave.git
+        mkdir -p ${{ github.workspace }}/.local/
+        cd libwave
+        cmake . -DCMAKE_INSTALL_PREFIX=${{ github.workspace }}/.local
+        make -j$procs
+        make install
+
+    - name: Cache iverilog
+      id: cache-iverilog
+      uses: actions/cache@v4
+      with:
+        path: .local/
+        key: ${{ inputs.runs-on }}-${{ steps.get-iverilog.outputs.IVERILOG_GIT }}
+
+    - name: iverilog macOS deps
+      if: steps.cache-iverilog.outputs.cache-hit != 'true' && runner.os == 'macOS'
+      shell: bash
+      run: |
+        brew install autoconf
+
+    - name: Build iverilog
+      if: steps.cache-iverilog.outputs.cache-hit != 'true'
+      shell: bash
+      run: |
+        mkdir -p ${{ github.workspace }}/.local/
+        cd iverilog
+        autoconf
+        CC=gcc CXX=g++ ./configure --prefix=${{ github.workspace }}/.local
+        make -j$procs
+        make install
+
+    - name: Check iverilog
+      shell: bash
+      run: |
+        iverilog -V

.github/workflows/test-build.yml

@@ -109,48 +109,7 @@ jobs:
         uses: ./.github/actions/setup-build-env
         with:
           runs-on: ${{ matrix.os }}
-
-      - name: Get iverilog
-        id: get-iverilog
-        shell: bash
-        run: |
-          git clone https://github.com/steveicarus/iverilog.git
-          cd iverilog
-          echo "IVERILOG_GIT=$(git rev-parse HEAD)" >> $GITHUB_OUTPUT
-
-      - name: Get vcd2fst
-        shell: bash
-        run: |
-          git clone https://github.com/mmicko/libwave.git
-          mkdir -p ${{ github.workspace }}/.local/
-          cd libwave
-          cmake . -DCMAKE_INSTALL_PREFIX=${{ github.workspace }}/.local
-          make -j$procs
-          make install
-
-      - name: Cache iverilog
-        id: cache-iverilog
-        uses: actions/cache@v4
-        with:
-          path: .local/
-          key: ${{ matrix.os }}-${{ steps.get-iverilog.outputs.IVERILOG_GIT }}
-
-      - name: iverilog macOS deps
-        if: steps.cache-iverilog.outputs.cache-hit != 'true' && runner.os == 'macOS'
-        shell: bash
-        run: |
-          brew install autoconf
-
-      - name: Build iverilog
-        if: steps.cache-iverilog.outputs.cache-hit != 'true'
-        shell: bash
-        run: |
-          mkdir -p ${{ github.workspace }}/.local/
-          cd iverilog
-          autoconf
-          CC=gcc CXX=g++ ./configure --prefix=${{ github.workspace }}/.local
-          make -j$procs
-          make install
+          setup-iverilog: true
 
       - name: Download build artifact
         uses: actions/download-artifact@v4

.github/workflows/test-sanitizers.yml

@@ -46,53 +46,7 @@ jobs:
         uses: ./.github/actions/setup-build-env
         with:
           runs-on: ${{ matrix.os }}
-
-      - name: Get iverilog
-        id: get-iverilog
-        shell: bash
-        run: |
-          git clone https://github.com/steveicarus/iverilog.git
-          cd iverilog
-          echo "IVERILOG_GIT=$(git rev-parse HEAD)" >> $GITHUB_OUTPUT
-
-      - name: Get vcd2fst
-        shell: bash
-        run: |
-          git clone https://github.com/mmicko/libwave.git
-          mkdir -p ${{ github.workspace }}/.local/
-          cd libwave
-          cmake . -DCMAKE_INSTALL_PREFIX=${{ github.workspace }}/.local
-          make -j$procs
-          make install
-
-      - name: Cache iverilog
-        id: cache-iverilog
-        uses: actions/cache@v4
-        with:
-          path: .local/
-          key: ${{ matrix.os }}-${{ steps.get-iverilog.outputs.IVERILOG_GIT }}
-
-      - name: iverilog macOS deps
-        if: steps.cache-iverilog.outputs.cache-hit != 'true' && runner.os == 'macOS'
-        shell: bash
-        run: |
-          brew install autoconf
-
-      - name: Build iverilog
-        if: steps.cache-iverilog.outputs.cache-hit != 'true'
-        shell: bash
-        run: |
-          mkdir -p ${{ github.workspace }}/.local/
-          cd iverilog
-          autoconf
-          CC=gcc CXX=g++ ./configure --prefix=${{ github.workspace }}/.local
-          make -j$procs
-          make install
-
-      - name: Check iverilog
-        shell: bash
-        run: |
-          iverilog -V
+          setup-iverilog: true
 
       - name: Build
         shell: bash