node.js script that generates a publish date for wordpress blog post files exported to jekyll using the wordpress-to-jekyll-exporter https://github.com/benbalter/wordpress-to-jekyll-exporter. The date is based on the file name (which includes the date). I created this because when I exported my data, the publish date was not exported.

add_pub_data.js

/*jslint vars: true, plusplus: true, devel: true, nomen: true, indent: 4, maxerr: 50, continue:true */
/*global require, exports, os */

(function () {
    "use strict";
    var fs = require("fs");
    var path = require("path");
    var os = require("os");
    
    //path that contains the posts to update. Note, this directory should ONLY contain
    //post files, and nothing else.
    var POSTS_DIR_PATH = "/Users/mesh/tmp/fix/_posts";
    var FILE_EOL_CHAR = os.EOL;
    
    var createPublishDate = function (fileName) {
        //2012-02-22
        
        var fileNameParts = fileName.split("-");
        
        var year = fileNameParts[0];
        var month = fileNameParts[1];
        var date = fileNameParts[2];
        
        
        //note, we generate a random time stamp for the publish date. It may be out of order
        //with other posts on the same day. If this is an issue, you might be able to read
        //create / change date of the file and order appropriately.
        
        //note, if you have multiple files published on the same date, they will
        //have same publish date / time. So we generate a random minute value, so they wont
        //be the same. However, there is a chance we will generate the same minutes. If you
        //have a lot of posts on the same day, you may want to make this more robust.
        var minutes = Math.floor(Math.random() * 60);
        
        minutes = String(minutes);
        if (minutes.length === 1) {
            minutes = "0" + minutes;
        }
        
        //2013-12-14 21:33:48 -0800
        var out = year + "-" + month + "-" + date + " " + "12:" + minutes + ":01 -0800";

        return out;
    };
    
    var main = function () {
        if (!fs.existsSync(POSTS_DIR_PATH)) {
            console.log("POST_DIR_PATH does not exist : " + POSTS_DIR_PATH);
            return;
        }
        
        //note : we are reading syncronous / block
        //very un-node like
        var posts = fs.readdirSync(POSTS_DIR_PATH);
        
        if (!posts || !posts.length) {
            console.log("No posts found in : " + POSTS_DIR_PATH);
            return;
        }
        
        var len = posts.length;
        var i;
        var postFileName, data, filePath;
        var options = {encoding: "utf8"};
        var tmp;
        for (i = 0; i < len; i++) {
            postFileName = posts[i];
            
            if (postFileName === ".DS_Store") {
                continue;
            }
            
            //create the path to the file
            filePath = path.join(POSTS_DIR_PATH, postFileName);
            
            //generate the publish date to insert
            var publishDate = createPublishDate(postFileName);
                  
            //read the file
            data = fs.readFileSync(filePath, options);
            
            //split it into an array (each item is a line)
            tmp = data.split(FILE_EOL_CHAR);
            
            //insert the publish date
            tmp.splice(3, 0, "date: " + publishDate);
            
            //write file back out
            fs.writeFileSync(filePath, tmp.join(FILE_EOL_CHAR), options);
        }
    };
    
    main();
}());