Better error message if platform binaries package is not found

CHANGELOG.md

@@ -23,6 +23,7 @@
 #### :nail_care: Polish
 
 - Configuration fields `bs-dependencies`, `bs-dev-dependencies` and `bsc-flags` are now deprecated in favor of `dependencies`, `dev-dependencies` and `compiler-flags`. https://github.com/rescript-lang/rescript/pull/7658
+- Better error message if platform binaries package is not found. https://github.com/rescript-lang/rescript/pull/7698
 
 #### :house: Internal
 

cli/common/bins.js

@@ -6,11 +6,28 @@
 
 const target = `${process.platform}-${process.arch}`;
 
+const supportedPlatforms = [
+  "darwin-arm64",
+  "darwin-x64",
+  "linux-arm64",
+  "linux-x64",
+  "win32-x64",
+];
+
 /** @type {BinaryModuleExports} */
 let mod;
-try {
-  mod = await import(`@rescript/${target}`);
-} catch {
+
+if (supportedPlatforms.includes(target)) {
+  const binPackageName = `@rescript/${target}`;
+
+  try {
+    mod = await import(binPackageName);
+  } catch {
+    throw new Error(
+      `Package ${binPackageName} not found. Make sure the rescript package is installed correctly.`,
+    );
+  }
+} else {
   throw new Error(`Platform ${target} is not supported!`);
 }