Grunt warning: No source files found - node.js

Question

I am trying to use Grunt for the first time. I think that I'm properly following the directions to install and use Grunt with a plugin (grunt-text-replace). (See, for instance, Grunt's page and the plugin's.) But I can't successfully run anything -- instead, I keep getting the same error. I've been checking my code against the instructions from both Grunt and the plugin, but I can't see anything I did wrong.
Here is my package.json file:
{
"name": "brink-prototype",
"version": "0.0.0",
"devDependencies": {
"grunt": "~0.4.1",
"grunt-contrib-jshint": "~0.1.1",
"grunt-contrib-nodeunit": "~0.1.2",
"grunt-text-replace": "~0.3.2"
}
}
And here is my Gruntfile.js:
module.exports = function(grunt) {
grunt.initConfig({
pkg: grunt.file.readJSON('package.json'),
replace: {
src: ['components/bootstrap/less/navbar.less'],
dest: 'build/',
replacements: [{
from: /\.box-shadow.*$/g,
to: ''
}]
}
});
grunt.loadNpmTasks('grunt-text-replace');
grunt.registerTask('default', ['replace']);
};
When I run "grunt" in the command line, I get the following error:
Running "replace:src" (replace) task
Warning: No source files found Use --force to continue.
Aborted due to warnings.
I also tried this process with another plugin (grunt-regex-replace) and had exactly the same error message.
Where have I gone wrong?
UPDATE:
Here are the relevant parts of the file structure:
project/
Gruntfile.js
package.json
components/
bootstrap/
less/
navbar.less
node_modules/
grunt/
grunt-text-replace/
I have been trying to run the command from the project/ directory, where the Gruntfile.js is.
Maybe the path in my src should be relative to something else? I don't know.

Answer 1

The grunt-text-replace plugin requires you to specify a subtask.
replace: {
aSubtaskName: {
src: ['components/bootstrap/less/navbar.less'],
dest: 'build/',
replacements: [{
from: /\.box-shadow.*$/g,
to: ''
}]
}
}