From 85d91e10b42a27d61e0a51d4e80edaf801e19a30 Mon Sep 17 00:00:00 2001
From: Zixuan Chen <remch183@outlook.com>
Date: Thu, 23 Mar 2023 22:19:26 +0800
Subject: [PATCH] chore: speedup wasm build

---
 crates/loro-wasm/scripts/build.ts | 37 ++++++++++++++++++++-----------
 1 file changed, 24 insertions(+), 13 deletions(-)

diff --git a/crates/loro-wasm/scripts/build.ts b/crates/loro-wasm/scripts/build.ts
index 0904d6b0..c40449cd 100644
--- a/crates/loro-wasm/scripts/build.ts
+++ b/crates/loro-wasm/scripts/build.ts
@@ -32,6 +32,26 @@ async function build() {
     return buildTarget(target);
   }));
 
+  if (profile !== "dev") {
+    let first = true;
+    let firstTarget = "";
+    for (const target of TARGETS) {
+      if (first) {
+        const cmd =
+          `wasm-opt -O4 ${target}/loro_wasm_bg.wasm -o ${target}/loro_wasm_bg.wasm`;
+        console.log(">", cmd);
+        firstTarget = target;
+        await Deno.run({ cmd: cmd.split(" "), cwd: LoroWasmDir }).status();
+        first = false;
+      } else {
+        const cmd =
+          `cp ${firstTarget}/loro_wasm_bg.wasm ${target}/loro_wasm_bg.wasm`;
+        console.log(">", cmd);
+        await Deno.run({ cmd: cmd.split(" "), cwd: LoroWasmDir }).status();
+      }
+    }
+  }
+
   console.log(
     "✅",
     "Build complete in",
@@ -67,20 +87,11 @@ async function buildTarget(target: string) {
     console.log("Clear directory " + targetDirPath);
   } catch (e) {}
 
-  for (const cmd of genCommands(target)) {
-    console.log(">", cmd);
-    await Deno.run({ cmd: cmd.split(" "), cwd: LoroWasmDir }).status();
-  }
+  const cmd =
+    `wasm-bindgen --weak-refs --target ${target} --out-dir ${target} ../../target/wasm32-unknown-unknown/${profileDir}/loro_wasm.wasm`;
+  console.log(">", cmd);
+  await Deno.run({ cmd: cmd.split(" "), cwd: LoroWasmDir }).status();
   console.log();
 }
 
-function genCommands(target: string): string[] {
-  return [
-    `wasm-bindgen --weak-refs --target ${target} --out-dir ${target} ../../target/wasm32-unknown-unknown/${profileDir}/loro_wasm.wasm`,
-    ...(profile == "dev" ? [] : [
-      `wasm-opt -O4 ${target}/loro_wasm_bg.wasm -o ${target}/loro_wasm_bg.wasm`,
-    ]),
-  ];
-}
-
 build();