a Metalsmith config

index.js

var Metalsmith   = require('metalsmith');
var markdown     = require('metalsmith-markdown');
var layouts      = require('metalsmith-layouts');
var sass         = require('metalsmith-sass');
var metadata     = require('metalsmith-metadata');
var inplace      = require('metalsmith-in-place');
var ignore       = require('metalsmith-ignore');
var metadataPat  = require('./metalsmith-metadata-pattern');

var marked   = require('marked');
var moment = require('moment');

var serveMode = process.argv.indexOf('--serve') != -1;

var site = Metalsmith(__dirname)
  .source('./src')
  .destination('./build')
  .metadata({
    serve: serveMode,
    prefix: serveMode ? '' : '/private',
  })
  .use(ignore(['**/.DS_Store']))
  .use(sass())

  // Scheduling.
  .use(metadata({
    lunch: 'lunch.yaml',
  }))
  .use(metadataPat({
    schedules: 'schedules/*.yaml',
  }))

  .use(inplace({
    'engineOptions': {
      // Filters/globals for Nunjucks.
      'filters': {
        'markdown': function (str) {
          return marked(str, { smartypants: true });
        },
        'date': function (d, f) {
          return moment(d).format(f);
        },
        'time': function (d, f) {
          return moment(d, 'hh:mma').format(f);
        },
      },
      'globals': {
        'now': function (f) {
          return moment().format(f);
        },
      },
    }
  }))
  .use(markdown({
    smartypants: true,
  }))
  .use(layouts('nunjucks'));

if (serveMode) {
  var serve = require('metalsmith-serve');
  var watch = require('metalsmith-watch');
  site = site
    .use(serve())
    .use(watch({
      paths: {
        "${source}/**/*": true,
        "layouts/**/*": "**/*.md",
        "${source}/**/*.yaml": "**/*",
      },
      livereload: true
    }));
}

site.build(function(err) {
  if (err) throw err;
});