Refactor packageJson logging

src/helpers/packageJson.js

 const _ = require('lodash');
 
-module.exports = {
-  setNewValue(currentFileContent, depType, depName, newVersion) {
+let logger = null;
+
+module.exports = function packageJson(config) {
+  logger = config.logger;
+  this.setNewValue = setNewValue;
+  return this;
+};
+
+function setNewValue(currentFileContent, depType, depName, newVersion) {
+  logger.debug(`setNewValue: ${depType}.${depName} = ${newVersion}`);
   const parsedContents = JSON.parse(currentFileContent);
   // Save the old version
   const oldVersion = parsedContents[depType][depName];
@@ -12,14 +20,16 @@ module.exports = {
   const newString = `"${newVersion}"`;
   let newFileContent = null;
   // Skip ahead to depType section
-    let searchIndex = currentFileContent.indexOf(`"${depType}"`) +
-      depType.length;
+  let searchIndex = currentFileContent.indexOf(`"${depType}"`) + depType.length;
+  logger.debug(`Starting search at index ${searchIndex}`);
   // Iterate through the rest of the file
   for (; searchIndex < currentFileContent.length; searchIndex += 1) {
     // First check if we have a hit for the old version
     if (matchAt(currentFileContent, searchIndex, searchString)) {
+      logger.debug(`Found match at index ${searchIndex}`);
       // Now test if the result matches
       const testContent = replaceAt(currentFileContent, searchIndex, searchString, newString);
+      logger.debug(`testContent = ${testContent}`);
       // Compare the parsed JSON structure of old and new
       if (_.isEqual(parsedContents, JSON.parse(testContent))) {
         newFileContent = testContent;
@@ -31,8 +41,7 @@ module.exports = {
     throw new Error('Could not find old version');
   }
   return newFileContent;
-  },
-};
+}
 
 // Return true if the match string is found at index in content
 function matchAt(content, index, match) {
@@ -41,5 +50,6 @@ function matchAt(content, index, match) {
 
 // Replace oldString with newString at location index of content
 function replaceAt(content, index, oldString, newString) {
+  logger.debug(`Replacing ${oldString} with ${newString} at index ${index}`);
   return content.substr(0, index) + newString + content.substr(index + oldString.length);
 }

src/index.js

 const semver = require('semver');
+const configurator = require('./helpers/configurator');
 
+const config = configurator.init(process.argv);
 const github = require('./helpers/github');
-const configurator = require('./helpers/configurator');
 const npm = require('./helpers/npm');
-const packageJson = require('./helpers/packageJson');
+const packageJson = require('./helpers/packageJson')(config);
 
-const config = configurator.init(process.argv);
 const logger = config.logger;
 
 // Initialize npm