Fix ESLint resource hogging (#177)

packages/esify/lib/eslint.js

@@ -1,16 +1,16 @@
-var proc = require('child_process');
-var path = require('path');
-var fs = require('fs');
+// This looks gross, but we don't want to fail if they don't have ESLint installed
+// locally.
 
-module.exports = function runESLint(details) {
-  return new Promise(function(resolve) {
-    var eslint = findESLintBinary();
-    if (eslint == null) { return; }
-    proc.exec(eslint + ' ' + details.file + ' --fix', resolve);
-  });
-};
+try {
+  // eslint-disable-next-line node/no-unpublished-require
+  var CLIEngine = require('eslint').CLIEngine;
+  var engine = new CLIEngine({fix: true});
 
-function findESLintBinary() {
-  var possibleBinary = path.join(proc.execSync('npm bin').toString().trim(), 'eslint');
-  return fs.statSync(possibleBinary).isFile() ? possibleBinary : null;
+  module.exports = function runESLint(details) {
+    console.log(engine.executeOnText(details.source).results[0].output);
+  };
+} catch (err) {
+  module.exports = function runESLint(details) {
+    return details.source;
+  };
 }

packages/esify/lib/index.js

@@ -52,18 +52,15 @@ function handleFile(filePath) {
   try {
     var decaffed = runDecaf({source: source, file: filePath, options: config});
     var codemoded = runCodemods({source: decaffed, file: filePath, options: config});
+    var linted = runESLint({source: codemoded, file: filePath, options: config});
 
     var newFile = path.join(
       path.dirname(filePath),
       path.basename(filePath, '.coffee').replace(/_/g, '-') + '.js'
     );
 
-    fs.writeFileSync(newFile, codemoded);
-
-    runESLint({file: newFile})
-      .then(function() {
-        console.log(filePath + ' => ' + newFile);
-      });
+    fs.writeFileSync(newFile, linted);
+    console.log(filePath + ' => ' + newFile);
   } catch (error) {
     handleError(filePath, error);
   }