1 files changed, 95 insertions, 0 deletions
diff --git a/llhttp/bin/build_wasm.ts b/llhttp/bin/build_wasm.ts
new file mode 100644
index 0000000..a885703
--- /dev/null
+++ b/llhttp/bin/build_wasm.ts
@@ -0,0 +1,95 @@
+import { execSync } from 'child_process';
+import { copyFileSync, mkdirSync } from 'fs';
+import { join, resolve } from 'path';
+
+let platform = process.env.WASM_PLATFORM ?? '';
+const WASM_OUT = resolve(__dirname, '../build/wasm');
+const WASM_SRC = resolve(__dirname, '../');
+
+if (!platform && process.argv[2]) {
+  platform = execSync('docker info -f "{{.OSType}}/{{.Architecture}}"').toString().trim();
+}
+
+if (process.argv[2] === '--prebuild') {
+  const cmd = `docker build --platform=${platform.toString().trim()} -t llhttp_wasm_builder .`;
+
+  /* tslint:disable-next-line no-console */
+  console.log(`> ${cmd}\n\n`);
+  execSync(cmd, { stdio: 'inherit' });
+
+  process.exit(0);
+}
+
+if (process.argv[2] === '--setup') {
+  try {
+    mkdirSync(join(WASM_SRC, 'build'));
+    process.exit(0);
+  } catch (error) {
+    if (error.code !== 'EEXIST') {
+      throw error;
+    }
+    process.exit(0);
+  }
+}
+
+if (process.argv[2] === '--docker') {
+  let cmd = `docker run --rm -it --platform=${platform.toString().trim()}`;
+  // Try to avoid root permission problems on compiled assets
+  // when running on linux.
+  // It will work flawessly if uid === gid === 1000
+  // there will be some warnings otherwise.
+  if (process.platform === 'linux') {
+    cmd += ` --user ${process.getuid()}:${process.getegid()}`;
+  }
+  cmd += ` --mount type=bind,source=${WASM_SRC}/build,target=/home/node/llhttp/build llhttp_wasm_builder npm run wasm`;
+
+  /* tslint:disable-next-line no-console */
+  console.log(`> ${cmd}\n\n`);
+  execSync(cmd, { cwd: WASM_SRC, stdio: 'inherit' });
+  process.exit(0);
+}
+
+try {
+  mkdirSync(WASM_OUT);
+} catch (error) {
+  if (error.code !== 'EEXIST') {
+    throw error;
+  }
+}
+
+// Build ts
+execSync('npm run build', { cwd: WASM_SRC, stdio: 'inherit' });
+
+// Build wasm binary
+execSync(
+  `clang \
+ --sysroot=/usr/share/wasi-sysroot \
+ -target wasm32-unknown-wasi \
+ -Ofast \
+ -fno-exceptions \
+ -fvisibility=hidden \
+ -mexec-model=reactor \
+ -Wl,-error-limit=0 \
+ -Wl,-O3 \
+ -Wl,--lto-O3 \
+ -Wl,--strip-all \
+ -Wl,--allow-undefined \
+ -Wl,--export-dynamic \
+ -Wl,--export-table \
+ -Wl,--export=malloc \
+ -Wl,--export=free \
+ -Wl,--no-entry \
+ ${join(WASM_SRC, 'build', 'c')}/*.c \
+ ${join(WASM_SRC, 'src', 'native')}/*.c \
+ -I${join(WASM_SRC, 'build')} \
+ -o ${join(WASM_OUT, 'llhttp.wasm')}`,
+  { stdio: 'inherit' },
+);
+
+// Copy constants for `.js` and `.ts` users.
+copyFileSync(join(WASM_SRC, 'lib', 'llhttp', 'constants.js'), join(WASM_OUT, 'constants.js'));
+copyFileSync(join(WASM_SRC, 'lib', 'llhttp', 'constants.js.map'), join(WASM_OUT, 'constants.js.map'));
+copyFileSync(join(WASM_SRC, 'lib', 'llhttp', 'constants.d.ts'), join(WASM_OUT, 'constants.d.ts'));
+copyFileSync(join(WASM_SRC, 'lib', 'llhttp', 'utils.js'), join(WASM_OUT, 'utils.js'));
+copyFileSync(join(WASM_SRC, 'lib', 'llhttp', 'utils.js.map'), join(WASM_OUT, 'utils.js.map'));
+copyFileSync(join(WASM_SRC, 'lib', 'llhttp', 'utils.d.ts'), join(WASM_OUT, 'utils.d.ts'));