Keep final new line in package.json

spec/cordova/plugin/add.spec.js

@@ -145,7 +145,7 @@ describe('cordova/plugin/add', function () {
 
                 spyOn(fs, 'readFileSync').and.returnValue('file');
                 return add(projectRoot, hook_mock, { plugins: ['cordova-plugin-device'], cli_variables: cli_plugin_variables, save: 'true' }).then(function () {
-                    expect(fs.writeFileSync).toHaveBeenCalledWith(jasmine.any(String), JSON.stringify({ cordova: { plugins: { 'cordova-plugin-device': cli_plugin_variables } }, dependencies: {}, devDependencies: {} }, null, 2), 'utf8');
+                    expect(fs.writeFileSync).toHaveBeenCalledWith(jasmine.any(String), JSON.stringify({ cordova: { plugins: { 'cordova-plugin-device': cli_plugin_variables } }, dependencies: {}, devDependencies: {} }, null, 2) + '\n', 'utf8');
                 });
             });
             it('should overwrite plugin information in config.xml after a successful installation', function () {

src/cordova/platform/addHelper.js

@@ -27,6 +27,8 @@
 const promiseutil = require('../../util/promise-util');
 const platforms = require('../../platforms');
 const detectIndent = require('detect-indent');
+const detectNewline = require('detect-newline');
+const stringifyPackage = require('stringify-package');
 const getPlatformDetailsFromDir = require('./getPlatformDetailsFromDir');
 const preparePlatforms = require('../prepare/platforms');
 
@@ -226,7 +228,8 @@
                 if (modifiedPkgJson === true) {
                     const file = fs.readFileSync(pkgJsonPath, 'utf8');
                     const indent = detectIndent(file).indent || '  ';
-                    fs.writeFileSync(pkgJsonPath, JSON.stringify(pkgJson, null, indent), 'utf8');
+                    const newline = detectNewline(file);
+                    fs.writeFileSync(pkgJsonPath, stringifyPackage(pkgJson, indent, newline), 'utf8');
                 }
             });
         }).then(function () {

src/cordova/platform/remove.js

@@ -25,6 +25,8 @@
 const promiseutil = require('../../util/promise-util');
 const platforms = require('../../platforms/platforms');
 const detectIndent = require('detect-indent');
+const detectNewline = require('detect-newline');
+const stringifyPackage = require('stringify-package');
 
 module.exports = remove;
 
@@ -71,7 +73,8 @@
                 if (modifiedPkgJson === true) {
                     const file = fs.readFileSync(pkgJsonPath, 'utf8');
                     const indent = detectIndent(file).indent || '  ';
-                    fs.writeFileSync(pkgJsonPath, JSON.stringify(pkgJson, null, indent), 'utf8');
+                    const newline = detectNewline(file);
+                    fs.writeFileSync(pkgJsonPath, stringifyPackage(pkgJson, indent, newline), 'utf8');
                 }
             }
         }).then(function () {

src/cordova/plugin/add.js

@@ -22,6 +22,8 @@
 const semver = require('semver');
 const url = require('url');
 const detectIndent = require('detect-indent');
+const detectNewline = require('detect-newline');
+const stringifyPackage = require('stringify-package');
 const cordova_util = require('../util');
 const plugin_util = require('./util');
 const cordova_pkgJson = require('../../../package.json');
@@ -154,7 +156,8 @@
                             // Write to package.json
                             const file = fs.readFileSync(pkgJsonPath, 'utf8');
                             const indent = detectIndent(file).indent || '  ';
-                            fs.writeFileSync(pkgJsonPath, JSON.stringify(pkgJson, null, indent), 'utf8');
+                            const newline = detectNewline(file);
+                            fs.writeFileSync(pkgJsonPath, stringifyPackage(pkgJson, indent, newline), 'utf8');
                         }
 
                         const src = module.exports.parseSource(target, opts);

src/cordova/plugin/remove.js

@@ -28,6 +28,8 @@
 const metadata = require('../../plugman/util/metadata');
 const PluginInfoProvider = require('cordova-common').PluginInfoProvider;
 const detectIndent = require('detect-indent');
+const detectNewline = require('detect-newline');
+const stringifyPackage = require('stringify-package');
 const { Q_chainmap } = require('../../util/promise-util');
 const preparePlatforms = require('../prepare/platforms');
 
@@ -145,7 +147,8 @@
             // Write out new package.json with plugin removed correctly.
             const file = fs.readFileSync(pkgJsonPath, 'utf8');
             const indent = detectIndent(file).indent || '  ';
-            fs.writeFileSync(pkgJsonPath, JSON.stringify(pkgJson, null, indent), 'utf8');
+            const newline = detectNewline(file);
+            fs.writeFileSync(pkgJsonPath, stringifyPackage(pkgJson, indent, newline), 'utf8');
         }
     }
 }