From d9fb14260ccb2191cf056085b7d2c149248c9b16 Mon Sep 17 00:00:00 2001
From: Daniyar Chambylov <dan.chambylov@gmail.com>
Date: Thu, 11 Apr 2019 16:06:19 +0600
Subject: [PATCH] Fix download compiler only once

---
 compat/truffle-compile/index.js | 22 +++++++++-------------
 1 file changed, 9 insertions(+), 13 deletions(-)

diff --git a/compat/truffle-compile/index.js b/compat/truffle-compile/index.js
index 1977f89..e74bae2 100644
--- a/compat/truffle-compile/index.js
+++ b/compat/truffle-compile/index.js
@@ -339,20 +339,16 @@ compile.with_dependencies = async function(options, callback, compileAll) {
 
   filteredRequired = filteredRequired.filter(sourcePath => !sourcePath.endsWith('/Migrations.sol'))
 
-  let isSolcLoaded = false;
+  if (filteredRequired.length > 0) {
+    // Download solc compiler
+    const supplier = new CompilerSupplier(options.compilers.solc);
+      await supplier.load()
+        .catch(e => {
+          throw e;
+        })
+
+  }
   Promise.all(filteredRequired.map(async (sourcePath) => {
-    if (!isSolcLoaded) {
-      const supplier = new CompilerSupplier(options.compilers.solc);
-      await supplier
-              .load()
-              .then(solc => {
-                // do nothing
-              })
-              .catch(e => {
-                throw e;
-              })
-      isSolcLoaded = true;
-    }
     await new Promise((resolve, reject) => {
       Profiler.imported_sources(
         config.with({