ejs2jst

ejs2jst.js

// tasks
//    ejs: {
//      'script/view.jst.js': 'view/**/*.ejs'
//    },

grunt.registerMultiTask('ejs', 'Compile EJS templates into JST.', function() {

    var options = {
        client: true,
        open: "<%",
        close: "%>"
    };

    grunt.verbose.writeflags(options, 'Options');

    var srcFiles;
    var taskOutput;

    this.files.forEach(function(file) {
        srcFiles = grunt.file.expand(file.src);
    
        taskOutput = [];

        srcFiles.forEach(function(srcFile) {
            taskOutput.push(compileEjs(srcFile, options));
        });

        if (taskOutput.length > 0) {
            grunt.file.write(file.dest, taskOutput.join('\n'));
            grunt.log.writeln('File ' + file.dest.cyan + ' created.');
        }
    });
});

var _uniqueId = function () {
    var _id = 0;
    return function () {
        return _id++;
    };
}();

function compileEjs (srcFile, options) {
    options = grunt.util._.extend({filename: srcFile}, options);
    var srcCode = grunt.file.read(srcFile);
    var jstName = srcFile.replace(/\.jst|\.ejs/ig, '');
    var _getSuffix = function (jName, fName) {
        return "if(typeof module != 'undefined') {"+
        "  module.exports = "+ fName +";"+
        "} else {"+
        "  window.JST = window.JST || {};"+
        "  window.JST[\""+jName+"\"] = "+ fName +";"+
        "}";
    };
    
    try {
        var fn = require('ejs').compile(srcCode, options);
        // voild 'anonymous' function being rewrote;
        var funcName = '__global_JST_FUNC_' + _uniqueId();
        return fn.toString().replace(/anonymous/g, funcName)+_getSuffix(jstName, funcName);
    } catch (e) {
        grunt.log.error(e);
        grunt.fail.warn('EJS failed to compile.');
    }
};