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{
    "strict"   : false,
    "undef"    : true,     
    "unused"   : true,
    "asi"      : true,
    "evil"     : false,
    "browser": true,
    "devel": true,
    "globals"  : { 
        "NEJ": true,
        "Regular": true
    }        
}

build/
src/**/tmp.js

"use strict";
module.exports = {
  reporter: function (res) {
    var len = res.length;
    var str = "";
    res.forEach(function (r) {
      var file = r.file;
      var err = r.error;
      str += file + ": line " + err.line + ", col " +
        err.character + ", " + err.reason + "\n";
    });
    if (str) {
      process.stdout.write(str + "\n" + len + " error" +
        ((len === 1) ? "" : "s") + "\n");
    }
  }
};

module.exports = {
  reporter: function (reporter) {
    //....
  }
};

{
  file:        [string, filename]
  error: {
    id:        [string, usually '(error)'],
    code:      [string, error/warning code],
    reason:    [string, error/warning message],
    evidence:  [string, a piece of code that generated this error]
    line:      [number]
    character: [number]
    scope:     [string, message scope;
                usually '(main)' unless the code was eval'ed]
    [+ a few other legacy fields that you don't need to worry about.]
  }
}

'use strict';
var fs = require('fs');
module.exports = {
  reporter: function (res) {
    var len = res.length;
    var str = '';
    var filename = '';
    res.forEach(function (r, i) {
      filename = r.file;
      var err = r.error;
      if(i === 0) str += filename + '\n';
      str += 'line ' + err.line + ', col ' +
        err.character + ', ' + err.reason + '\n';
    });
    if (str) {
      var output = str + '\n\n';
      fs.writeFileSync('message.txt', output);
    }
  }
};

jshint --reporter=myreporter.js myfile.js

// code-check.js
var fs = require('fs');
var path = require('path');
var exec = require('child_process').exec;
var curPath = path.join(process.cwd(), 'src', 'javascript');
function travelDir(dir, callback) {
    fs.readdirSync(dir).forEach(function(file) {
        var pathname = path.join(dir, file);
        if(fs.statSync(pathname).isDirectory()) {
            travelDir(pathname, callback);
        } else {
            callback(pathname);
        }
    });
}
fs.writeFileSync('message.txt', '');
travelDir(curPath, function(file) {
    exec('jshint --reporter=reporter.js ' + file);
});

// reporter.js
'use strict';
var fs = require('fs');
module.exports = {
  reporter: function (res) {
    var len = res.length;
    var str = '';
    var filename = '';
    res.forEach(function (r, i) {
      filename = r.file;
      var err = r.error;
      if(i === 0) str += filename + '\n';
      str += 'line ' + err.line + ', col ' +
        err.character + ', ' + err.reason + '\n';
    });
    if (str) {
      var output = str + '\n\n';
      fs.appendFileSync('message.txt', output);
    }
  }
};

<script src="node_modules/jshint/dist/jshint.js"></script>

var source = [
    'function() { console.log("a") }',
    'x = 3'
]
var options = {
    undef: true
}
var predef = {
    x: true
}
var result = JSHINT(source, options, predef)
console.log(JSHINT.data())

// check.js
var JSHINT = require('jshint').JSHINT,
    fs = require('fs'),
    files = [];
process.argv.forEach(function(val) {
    files.push(val)
})
console.log('-----------------------------------------')
for(var i = 2; i < files.length; i++) {
    fs.readFile(files[i], function(err, data) {
        if(err) {
            console.log('Error: ' + err)
            return
        }
        if(JSHINT(data.toString())) {
            console.log('File ' + files[i] + ' has no errors!')
        } else {
            console.log('Errors in file ' + files[i]);
            console.log('')
            var out = JSHINT.data(),
                errors = out.errors;
            for(j = 0; j < errors.length; j++) {
                console.log(errors[j].line + ': ' + errors[j].character + ' -> ' + 
                    errors[j].reason + ' -> ' + errors[j].evidence);
            }
            console.log('')
            console.log('Globals: ')
            for(var j = 0; j < out.globals.length; j++) {
                console.log('       ' + out.globals[j]);
            }
        } 
        console.log('---------------------------------------------')
    })
}

node check a.js b.js c.js