jshint grunt targets generate message: 0 files linted. Please check your ignored files - jshint

Question

I have multiple jshint configurations in my gruntfile.
I tested each configuration, and it works great.
However, when I define a target in the gruntfile for each configuration, jshint stops working and all I can see is :
0 files linted. Please check your ignored files.
This is how my jshint configuration looks like with targets:
jshint: {
backend: {
options: {
jshintrc: '.jshintrc'
},
all: [
'Gruntfile.js',
'server.js',
'*.js',
'backend/{,*/}*.js'
]
},
test: {
options: {
jshintrc: 'test.jshintrc'
},
all: [
'test/{,*/}*.js'
]
}
}

Answer 1

For multiple tasks changing:
'all' : {...}
to
'files': { src: [...] }
should fix it. It would seem that 'all' is a shorthand for a single task, with multiple tasks, jshint will be looking for files in files->src ie:
backend: {
options: {
jshintrc: '.jshintrc'
},
'files': {
'src': [
'Gruntfile.js',
'server.js',
'*.js',
'backend/{,*/}*.js'
]
}
},
test: {
options: {
jshintrc: 'test.jshintrc'
},
'files': {
'src': [
'test/{,*/}*.js'
]
}
}

Answer 2

My team found out this works, we are using it on a project of ours.
Even though I don't recommend using this method, it taught me something about how grunt works, and how you can programatically invoke tasks and change options at runtime so I find it relevant.
jshint: {
options: {
jshintrc: '.jshintrc'
},
all: [
'Gruntfile.js',
'<%= yeoman.app %>/scripts/{,*/}*.js'
],
backend: [
'server.js'
]
},
....
grunt.registerTask('backend', function() {
grunt.config.set('jshint.options.jshintrc', '.backendhintrc');
grunt.task.run('jshint:backend');
});