run wait for install (cloudflare#28)

Co-authored-by: Avery Harnish <averyharnish@gmail.com>
Co-authored-by: avery <avery@apollographql.com>

Author: wighawag

packages/binary-install/index.js

@@ -97,21 +97,28 @@ class Binary {
   }
 
   run(fetchOptions) {
-    if (!this.exists()) {
-      this.install(fetchOptions, true);
-    }
+    const promise = !this.exists()
+      ? this.install(fetchOptions, true)
+      : Promise.resolve();
 
-    const [, , ...args] = process.argv;
+    promise
+      .then(() => {
+        const [, , ...args] = process.argv;
 
-    const options = { cwd: process.cwd(), stdio: "inherit" };
+        const options = { cwd: process.cwd(), stdio: "inherit" };
 
-    const result = spawnSync(this.binaryPath, args, options);
+        const result = spawnSync(this.binaryPath, args, options);
 
-    if (result.error) {
-      error(result.error);
-    }
+        if (result.error) {
+          error(result.error);
+        }
 
-    process.exit(result.status);
+        process.exit(result.status);
+      })
+      .catch(e => {
+        error(e.message);
+        process.exit(1);
+      });
   }
 }