Improve GitHub Actions (OpenZeppelin#3451)

.github/actions/setup/action.yml

@@ -0,0 +1,20 @@
+name: Setup
+
+runs:
+  using: composite
+  steps:
+    - uses: actions/setup-node@v3
+      with:
+        node-version: 14.x
+        cache: npm
+    - uses: actions/cache@v3
+      id: cache
+      with:
+        path: '**/node_modules'
+        key: npm-v3-${{ hashFiles('**/package-lock.json') }}
+    - name: Install dependencies
+      run: npm ci --prefer-offline
+      shell: bash
+      if: steps.cache.outputs.cache-hit != 'true'
+      env:
+        SKIP_COMPILE: true

.github/workflows/checks.yml

@@ -0,0 +1,54 @@
+name: checks
+
+on:
+  push:
+    branches:
+      - master
+      - release-v*
+  pull_request: {}
+  workflow_dispatch: {}
+
+concurrency:
+  group: checks-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up environment
+        uses: ./.github/actions/setup
+      - run: npm run lint
+
+  tests:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up environment
+        uses: ./.github/actions/setup
+      - run: npm run test
+        env:
+          FORCE_COLOR: 1
+          ENABLE_GAS_REPORT: true
+      - run: npm run test:inheritance
+      - run: npm run test:generation
+
+  coverage:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up environment
+        uses: ./.github/actions/setup
+      - run: npm run coverage
+        env:
+          NODE_OPTIONS: --max_old_space_size=4096
+      - uses: codecov/codecov-action@v3
+
+  slither:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up environment
+        uses: ./.github/actions/setup
+      - uses: crytic/slither-action@v0.1.1

.github/workflows/docs.yml

@@ -9,17 +9,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - uses: actions/setup-node@v3
-        with:
-          node-version: 12.x
-      - uses: actions/cache@v3
-        id: cache
-        with:
-          path: '**/node_modules'
-          key: npm-v2-${{ hashFiles('**/package-lock.json') }}
-          restore-keys: npm-v2-
-      - run: npm ci
-        if: steps.cache.outputs.cache-hit != 'true'
+      - name: Set up environment
+        uses: ./.github/actions/setup
       - run: bash scripts/git-user-config.sh
       - run: node scripts/update-docs-branch.js
       - run: git push --all origin 

package.json

@@ -23,7 +23,7 @@
     "lint:sol": "solhint 'contracts/**/*.sol' && prettier -c 'contracts/**/*.sol'",
     "lint:sol:fix": "prettier --write \"contracts/**/*.sol\"",
     "clean": "hardhat clean && rimraf build contracts/build",
-    "prepare": "npm run clean && env COMPILE_MODE=production npm run compile",
+    "prepare": "scripts/prepare.sh",
     "prepack": "scripts/prepack.sh",
     "generate": "scripts/generate/run.js",
     "release": "scripts/release/release.sh",

scripts/prepare.sh

@@ -0,0 +1,10 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+if [ "${SKIP_COMPILE:-}" == true ]; then
+  exit
+fi
+
+npm run clean
+env COMPILE_MODE=production npm run compile