fix: use util.promisify instead of bluebird

bayleeadamoss/zazu#334

package.json

@@ -23,9 +23,9 @@
   },
   "homepage": "https://github.com/linonetwo/zazu-firefox-bookmarks#readme",
   "dependencies": {
-    "bluebird": "^3.5.4",
     "fast-fuzzy": "^1.8.5",
-    "traverse": "^0.6.6"
+    "traverse": "^0.6.6",
+    "util.promisify": "^1.0.0"
   },
   "devDependencies": {
     "@types/node": "^12.0.0",

src/bookmarkParser/index.js

@@ -1,12 +1,12 @@
 // @ts-check
-const Promise = require('bluebird');
+const promisify = require('util.promisify');
 const os = require('os');
 const fs = require('fs');
 const path = require('path');
 const { exec } = require('child_process');
 
-const readdirAsync = Promise.promisify(fs.readdir);
-const execAsync = Promise.promisify(exec);
+const readdirAsync = promisify(fs.readdir);
+const execAsync = promisify(exec);
 
 function bookmarkParser(version = 'default', pluginContext) {
   let filePath;
@@ -36,6 +36,13 @@ function bookmarkParser(version = 'default', pluginContext) {
             shellCommandToReadData,
           });
           return execAsync(shellCommandToReadData)
+            .then(({ stdout }) => {
+              if (!stdout) throw new Error('No stdout after exec');
+              if (typeof stdout === 'string') {
+                return stdout;
+              }
+              throw new Error(`Bad stdout type ${typeof stdout}`);
+            })
             .then(JSON.parse)
             .then(content => ({ filename, content }));
         });