Add GHA docker build caching support

.github/workflows/build.yml

@@ -12,19 +12,25 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
+      - uses: docker/setup-qemu-action@v2
+
+      - uses: docker/setup-buildx-action@v2
+
       - uses: pnpm/action-setup@v2
         with:
           version: 8
 
       - uses: actions/setup-node@v4
         with:
-          node-version: 18
+          node-version: 20
           cache: pnpm
 
       - name: Install dependencies
         run: pnpm install
 
       - name: Build
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: pnpm build
 
       - name: Dry run publish
@@ -33,4 +39,4 @@ jobs:
       - uses: actions/upload-artifact@v4
         with:
           name: dists
-          path: ./**/dist/**/*
+          path: ./**/dist/*

packages/binutils/build/dist.js

@@ -0,0 +1,26 @@
+const { spawn } = require("child_process");
+
+if (typeof require !== "undefined" && require.main === module) {
+  const extraArgs = process.argv.slice(2);
+  if (extraArgs.length > 0) {
+    console.log("Extra arguments:", extraArgs);
+  }
+  if (process.env["GITHUB_TOKEN"]) {
+    console.log("GITHUB_TOKEN is set, assuming CI environment");
+    extraArgs.push("--cache-to=type=gha,mode=max", "--cache-from=type=gha");
+  }
+  const ret = spawn("docker", [
+    "buildx",
+    "build",
+    "--progress=plain",
+    "--build-arg=BRANCH=binutils-2_41-branch",
+    `--output=${process.cwd()}/build`,
+    ...extraArgs,
+    `${process.cwd()}/build`,
+  ]);
+  ret.stdout.pipe(process.stdout);
+  ret.stderr.pipe(process.stderr);
+  ret.on("exit", (code) => {
+    process.exit(code ?? 0);
+  });
+}

packages/binutils/package.json

@@ -16,7 +16,7 @@
   ],
   "scripts": {
     "build:wrapper": "tsup",
-    "build:wasm": "docker buildx build --progress=plain --build-arg BRANCH=binutils-2_41-branch --output ./build ./build",
+    "build:wasm": "node ./build/dist.js",
     "build": "pnpm run build:wasm && pnpm run build:wrapper",
     "prebuild": "rm -rf ./build/dist"
   },

packages/gas/build/dist.ts

@@ -21,13 +21,22 @@ const supportedTargets = [
 export type SupportedTarget = (typeof supportedTargets)[number];
 
 if (typeof require !== "undefined" && require.main === module) {
+  const extraArgs = process.argv.slice(2);
+  if (extraArgs.length > 0) {
+    console.log("Extra arguments:", extraArgs);
+  }
+  if (process.env["GITHUB_TOKEN"]) {
+    console.log("GITHUB_TOKEN is set, assuming CI environment");
+    extraArgs.push("--cache-to=type=gha,mode=max", "--cache-from=type=gha");
+  }
   const ret = spawn("docker", [
     "buildx",
     "build",
     "--progress=plain",
     "--build-arg=BRANCH=binutils-2_41-branch",
     `--build-arg=TARGET=${supportedTargets.join(",")}`,
     `--output=${process.cwd()}/build`,
+    ...extraArgs,
     `${process.cwd()}/build`,
   ]);
   ret.stdout.pipe(process.stdout);