Separate setup step to a dedicated action

The approach is similar to current OT CI.

Signed-off-by: Gary Guo <gary@garyguo.net>

Author: nbdd0121

.github/actions/prepare-env/action.yml

@@ -0,0 +1,49 @@
+# Copyright lowRISC contributors.
+# Licensed under the Apache License, Version 2.0, see LICENSE for details.
+# SPDX-License-Identifier: Apache-2.0
+
+name: Prepare environment
+description: Install dependencies and prepare environment
+
+inputs:
+  verilator-version:
+    description: Verilator version to install
+    required: true
+    default: '4.210'
+  verilator-path:
+    description: Path at which to install Veriltator
+    required: true
+    default: /tools/verilator
+
+runs:
+  using: composite
+  steps:
+    - uses: astral-sh/setup-uv@v5
+      with:
+        version: '0.6.1'
+        enable-cache: true
+        cache-dependency-glob: |
+          python-requirements.txt
+
+    - name: Install Python
+      shell: bash
+      run: |
+        uv python install 3.10
+        # Create a virtual environment for UV
+        uv venv ~/.local/share/venv
+        echo "$HOME/.local/share/venv/bin" >> "$GITHUB_PATH"
+        echo "VIRTUAL_ENV=$HOME/.local/share/venv" >> "$GITHUB_ENV"
+
+    - name: Install Python dependencies
+      shell: bash
+      run: |
+        uv pip install -r python-requirements.txt
+
+    - name: Install Verilator
+      run: |
+        VERILATOR_TAR="verilator-v${{ inputs.verilator-version }}.tar.gz"
+        VERILATOR_URL="https://storage.googleapis.com/verilator-builds/${VERILATOR_TAR}"
+        sudo mkdir -p "${{ inputs.verilator-path }}"
+        curl -sSfL "$VERILATOR_URL" | sudo tar -C "${{ inputs.verilator-path }}" -xvzf -
+        echo "${{ inputs.verilator-path }}/v${{ inputs.verilator-version }}/bin" >> "$GITHUB_PATH"
+      shell: bash

.github/workflows/ci.yml

@@ -11,20 +11,8 @@ jobs:
       - name: Checkout Muntjac
         uses: actions/checkout@v4
 
-      - name: Install Verilator
-        run: |
-          VERILATOR_VERSION=v4.210
-          wget https://storage.googleapis.com/verilator-builds/verilator-"$VERILATOR_VERSION".tar.gz
-          sudo mkdir -p /tools/verilator
-          sudo chmod 777 /tools/verilator
-          sudo tar -C /tools/verilator -xvzf verilator-"$VERILATOR_VERSION".tar.gz
-          echo "/tools/verilator/$VERILATOR_VERSION/bin" >> $GITHUB_PATH
-
-      - name: Install Python dependencies
-        run: pip3 install setuptools wheel
-
-      - name: Install FuseSoC
-        run: pip3 install -r python-requirements.txt
+      - name: Prepare environment
+        uses: ./.github/actions/prepare-env
 
       - name: Run lint
         run: make lint
@@ -44,20 +32,8 @@ jobs:
       - name: Checkout Muntjac
         uses: actions/checkout@v4
 
-      - name: Install Verilator
-        run: |
-          VERILATOR_VERSION=v4.210
-          wget https://storage.googleapis.com/verilator-builds/verilator-"$VERILATOR_VERSION".tar.gz
-          sudo mkdir -p /tools/verilator
-          sudo chmod 777 /tools/verilator
-          sudo tar -C /tools/verilator -xvzf verilator-"$VERILATOR_VERSION".tar.gz
-          echo "/tools/verilator/$VERILATOR_VERSION/bin" >> $GITHUB_PATH
-
-      - name: Install Python dependencies
-        run: pip3 install setuptools wheel
-
-      - name: Install FuseSoC
-        run: pip3 install -r python-requirements.txt
+      - name: Prepare environment
+        uses: ./.github/actions/prepare-env
 
       - name: Run build
         run: make sim-${{ matrix.name }}