Allow custom build command

Author: fwang

.changeset/pretty-tables-teach.md

@@ -0,0 +1,5 @@
+---
+"open-next": patch
+---
+
+Allow custom build command

packages/open-next/src/build.ts

@@ -10,6 +10,7 @@ interface BuildOptions {
   minify?: boolean;
   debug?: boolean;
   appPath?: string;
+  buildCommand?: string;
 }
 
 const require = topLevelCreateRequire(import.meta.url);
@@ -57,6 +58,7 @@ function normalizeOptions(opts: BuildOptions) {
     tempDir: path.join(outputDir, ".build"),
     minify: opts.minify ?? Boolean(process.env.OPEN_NEXT_MINIFY) ?? false,
     debug: opts.debug ?? Boolean(process.env.OPEN_NEXT_DEBUG) ?? false,
+    buildCommand: opts.buildCommand,
   };
 }
 
@@ -107,18 +109,13 @@ function setStandaloneBuildMode(monorepoRoot: string) {
 
 function buildNextjsApp(packager: "npm" | "yarn" | "pnpm") {
   const { appPath } = options;
-  const result = cp.spawnSync(
-    packager,
-    packager === "npm" ? ["run", "build"] : ["build"],
-    {
-      stdio: "inherit",
-      cwd: appPath,
-      shell: true,
-    }
-  );
-  if (result.status && result.status !== 0) {
-    process.exit(1);
-  }
+  const command =
+    options.buildCommand ??
+    (packager === "npm" ? "npm run build" : `${packager} build`);
+  cp.execSync(command, {
+    stdio: "inherit",
+    cwd: appPath,
+  });
 }
 
 function printHeader(header: string) {

packages/open-next/src/index.ts

@@ -3,13 +3,37 @@
 import { build } from "./build.js";
 
 const command = process.argv[2];
+if (command !== "build") printHelp();
 
-if (command === "build") {
-  build();
-} else {
+const args = parseArgs();
+if (Object.keys(args).includes("--help")) printHelp();
+
+build({
+  buildCommand: args["--build-command"],
+});
+
+function parseArgs() {
+  return process.argv.slice(2).reduce((acc, key, ind, self) => {
+    if (key.startsWith("--")) {
+      if (self[ind + 1] && self[ind + 1].startsWith("-")) {
+        acc[key] = undefined;
+      } else if (self[ind + 1]) {
+        acc[key] = self[ind + 1];
+      } else if (!self[ind + 1]) {
+        acc[key] = undefined;
+      }
+    }
+    return acc;
+  }, {} as Record<string, string | undefined>);
+}
+
+function printHelp() {
   console.log("Unknown command");
   console.log("");
   console.log("Usage:");
   console.log("  npx open-next build");
+  console.log("  npx open-next build --build-command 'npm run custom:build'");
   console.log("");
+
+  process.exit(1);
 }