如何在Yeeoman项目中重新安装Grunt？

Question

Something happened to my Grunt installation, and I have no idea what it was. I am using Yeoman to scaffold my app, but today I started getting many Grunt errors. For instance, I now get the following when I run Grunt Test :

Loading "autoprefixer.js" tasks...ERROR
>> Error: Cannot find module 'base64-js'
Loading "connect.js" tasks...ERROR
>> Error: Cannot find module 'cookie-signature'
Loading "imagemin.js" tasks...ERROR
>> Error: Cannot find module './lib/js-yaml.js'
Loading "jshint.js" tasks...ERROR
>> Error: Cannot find module 'jshint'
Loading "uglify.js" tasks...ERROR
>> Error: Cannot find module './source-map/source-map-generator'
Loading "cdnify.js" tasks...ERROR
>> SyntaxError: /Users/Documents/Git/client/node_modules/grunt-google-cdn/node_modules/google-cdn/node_modules/cdnjs-cdn-data/external/cdnjs.json: Unexpected end of input
Loading "grunt-karma.js" tasks...ERROR
>> SyntaxError: /Users/Documents/Git/client/node_modules/karma/node_modules/socket.io/node_modules/engine.io/lib/server.js:390
>> });
>>    
>> Unexpected end of input
Loading "ngmin.js" tasks...ERROR
>> Error: Cannot find module 'estraverse'
Loading "svgmin.js" tasks...ERROR
>> SyntaxError: /Users/Documents/Git/client/node_modules/grunt-svgmin/node_modules/svgo/node_modules/js-yaml/lib/js-yaml/loader.js:950
>> });
>>  ^
>> Unexpected token )
Loading "usemin.js" tasks...ERROR
>> SyntaxError: /Users/Documents/Git/client/node_modules/grunt-usemin/node_modules/lodash/dist/lodash.js:5520
>> });
>> ^
>> Unexpected token }
Loading "css_sprite.js" tasks...ERROR
>> Error: Cannot find module 'async'
Warning: Task "autoprefixer" not found. Use --force to continue.

I have updated NPM, I have tried to update Grunt, I have tried to install all of those packages that Grunt can not find. Is there a way to nuke and repave Grunt and install a brand new copy for this project?

Answer 1

You might have partially installed npm packages cached on your machine.

Try running npm cache clean

Then delete the project packages installed: rm -rf node_modules

Then try running npm install one more time.

Answer 2

Just follow the error messages...for eg yours say...

Warning: Task "autoprefixer" not found. Use --force to continue.

Try installing grunt-autoprefixer...

npm install grunt-autoprefixer --save

Then run grunt test again...

You get other error messages...find the stuff that is missing...install it via npm. At times you may have to google for the correct package names...