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$ npm install spelunk

spelunk.js turns a folder into an object. This folder...

|- config.json
|- tables
   |- population.csv
   |- growth.csv
|- slides
   |- 0.txt
   |- 1.txt
   |- 2.txt
   |- 3.txt
|- i18n
   |- en-GB.json
   |- en-US.json
   |- fr.json
   |- de.json
   |- ...

...becomes this object:

  config: { <contents of config.json> }, // parsed as JSON 
  tables: {
    population: <contents of population.csv> // as a string 
    growth:     <contents of growth.csv>
  slides: [
    <contents of 0.txt>,  // because these files have 
    <contents of 1.txt>,  // numeric names, `slides` is 
    <contents of 2.txt>,  // an array, not an object 
    <contents of 3.txt>
  i18n: {
    "en-GB": <contents of en-GB.json>,
    "en-US": <contents of en-US.json>,
    "fr":    <contents of fr.json>,
    "de":    <contents of de.json>,

If a file contains JSON, it is parsed as JSON; if not, it is treated as text. If a folder only contains items with numeric filenames (as in the case of the slides folder above), it will become an array rather than an object.


spelunk.js uses the standard Node callback pattern...

callback = function ( error, result ) {
  if ( error ) {
    return handleError( error );
  doSomething( result );
spelunk( 'myFolder', options, callback ); // you can omit options 

...but it also returns a promise, because this is 2015 dammit and callbacks are a lousy flow control mechanism:

spelunk( 'myFolder', options ).then( doSomething, handleError );

Synchronous usage

var result = spelunk.sync( 'myFolder', options );



Exclude files that match a certain pattern (this uses minimatch syntax):

spelunk( 'myFolder', { exclude: '**/' }).then( doSomething );

The value of exclude can be an string, or an array of strings.


If you have multiple files with the same name but different extensions, they'll conflict. This option allows you to keep their extensions, e.g. result['config.json'] instead of result.config (but really, you're better off keeping your filenames distinct).

spelunk( 'myFolder', { keepExtensions: true }).then( doSomething );

Why the name?

Because traversing a folder tree and mapping all its nooks and crannies feels a bit like spelunking. Plus it's fun to say.


$ npm run test


MIT, copyright 2014 @Rich_Harris