eco-compiler.js

#!/usr/bin/env node

// inspired by https://github.com/sstephenson/eco/pull/33/files use it when it's merged instead of this.

eco = require("eco")
fs = require("fs")

function precompile(file, rebuild) {
  fs.readFile(file, "utf-8", function(err, inEco) {
    inJst = eco.precompile(inEco);
    var newName = file.replace('.eco', '.jst').replace('eco/', 'templates/')
    fs.writeFile(newName, inJst, function(err) {
      if(err) {
        console.log(err);
      } else {
        console.log("... " + newName + ' written');
        
        if(rebuild) {
          rebuildJST("templates/");
        }
      }
    });
  });
}

function watchFile(file) {
  console.log("watching " + file);
  fs.watchFile(file, function(stats, prevStats) {
    if(stats.size !== prevStats.size || stats.mtime.getTime() !== prevStats.mtime.getTime()) {
      console.log("change " + file);
      precompile(file, true);
    }
  });
}

function watchDir(dir) {
  fs.readdir(dir, function(err, files) {
    var ecos = [];
    for(i in files) {
      var file = files[i];
      if(file.match(/\.eco$/g)) {
        ecos.push(file);
      }
    }
    for(i in ecos) {
      var file = ecos[i];
      var path = dir + file;
      watchFile(path);
      precompile(path, i == (ecos.length - 1));
    }
  });
}

function rebuildJST(dir) {
  fs.readdir(dir, function(err, files) {
    var compiled = 'public/js/jst.js';
    fs.open(compiled, 'w+', 0666, function(err, fdw) {

      var bytesRead, fdr, fdw, pos;
      var BUF_LENGTH = 64 * 1024;
      var buff = new Buffer(BUF_LENGTH);

      var s = "window.JST = {};\n";
      buff.write(s)
      fs.writeSync(fdw, buff, 0, s.length, null);

      for(i in files) {
        var file = files[i];
        if(file.match(/\.jst$/g)) {
          var path = dir + file;

          var s = "JST['" + file.replace('.jst', '') + "'] = ";
          buff.write(s);
          fs.writeSync(fdw, buff, 0, s.length);

          fdr = fs.openSync(path, 'r');
          bytesRead = 1;
          pos = 0;
          while (bytesRead > 0) {
            bytesRead = fs.readSync(fdr, buff, 0, BUF_LENGTH, pos);
            fs.writeSync(fdw, buff, 0, bytesRead);
            pos += bytesRead;
          }
          fs.closeSync(fdr);

          buff.write(";\n");
          fs.writeSync(fdw, buff, 0, 2);
        }
      }
      console.log("... " + compiled + ' written');
    });    
  });
}

watchDir("eco/")
// rebuildJST("templates/")