build tools

1 files changed, 33 insertions, 1 deletions

diff --git a/packages/web-util/build.mjs b/packages/web-util/build.mjs
index 6e20b8b92..8e74f69c7 100755
--- a/packages/web-util/build.mjs
+++ b/packages/web-util/build.mjs
@@ -65,6 +65,35 @@ const buildConfigBase = {
   },
 }
 
+/**
+ * Build time libraries, under node runtime
+ */
+const buildConfigBuild = {
+  ...buildConfigBase,
+  entryPoints: ["src/index.build.ts"],
+  outExtension: {
+    '.js': '.mjs'
+  },
+  format: 'esm',
+  platform: 'node',
+  external: ["esbuild"],
+  // https://github.com/evanw/esbuild/issues/1921
+  // How to fix "Dynamic require of "os" is not supported"
+  // esbuild cannot convert external "static" commonjs require statements to static esm imports
+  banner: { 
+    js: `
+    import { fileURLToPath } from 'url';
+    import { createRequire as topLevelCreateRequire } from 'module';
+    const require = topLevelCreateRequire(import.meta.url);
+    const __filename = fileURLToPath(import.meta.url);
+    const __dirname = path.dirname(__filename);
+`
+  },
+};
+
+/**
+ * Development libraries, under node runtime
+ */
 const buildConfigNode = {
   ...buildConfigBase,
   entryPoints: ["src/index.node.ts", "src/cli.ts"],
@@ -76,6 +105,9 @@ const buildConfigNode = {
   external: ["preact"],
 };
 
+/**
+ * Support libraries, under browser runtime
+ */
 const buildConfigBrowser = {
   ...buildConfigBase,
   entryPoints: ["src/tests/mock.ts", "src/tests/swr.ts", "src/index.browser.ts", "src/live-reload.ts", 'src/stories.tsx'],
@@ -89,7 +121,7 @@ const buildConfigBrowser = {
   jsxFragment: 'Fragment',
 };
 
-[buildConfigNode, buildConfigBrowser].forEach((config) => {
+[buildConfigNode, buildConfigBrowser, buildConfigBuild].forEach((config) => {
   esbuild
     .build(config)
     .catch((e) => {