Fixes #3843

Fixes #3843 by using nodejs fs.copyFileSync to copy pre-built compilers instead of using ninja.exe. Since ninja.exe is classed as trojan by many anti-virus software.

Author: bikallem

scripts/install.js

@@ -196,44 +196,11 @@ function install(stdlib) {
   });
 }
 
-/**
- *
- * @param {string} sys_extension
- *
- */
-function createCopyNinja(sys_extension) {
-  var output = "";
-  switch (sys_extension) {
-    case ".win32":
-      output += `
-rule cp
-    command = cmd /q /c copy $in $out 1>nul
-`;
-      break;
-    default:
-      output += `
-rule cp 
-    command = cp $in $out
-`;
-      break;
-  }
-  output += ["bsc", "bsb", "bsb_helper", "bsppx", "refmt"]
-    .map(function(x) {
-      return `build ${x}.exe: cp ${x}${sys_extension}`;
-    })
-    .join("\n");
-  output += "\n";
-  return output;
-}
-
 function copyPrebuiltCompilers() {
-  var filePath = path.join(lib_dir, "copy.ninja");
-  fs.writeFileSync(filePath, createCopyNinja(sys_extension), "ascii");
-  cp.execFileSync(ninja_bin_output, ["-f", "copy.ninja"], {
-    cwd: lib_dir,
-    stdio: [0, 1, 2]
+  ["bsc", "bsb", "bsb_helper", "bsppx", "refmt"]
+  .forEach(function (x) {
+    fs.copyFileSync(path.join(lib_dir, `${x}${sys_extension}`), path.join((lib_dir), `${x}.exe`));
   });
-  fs.unlinkSync(filePath);
 }
 
 /**