PhantomJS require() a relative path - requirejs

Question

In a PhantomJS script I would like to load a custom module but it seems relative paths do not works in PhantomJS ?
script.js:
var foo = require('./script/lib/foo.js');
foo.bar('hello world');
phantom.exit();
foo.js:
exports.bar = function(text){
console.log(text);
}
According to fs.workingDirectory I am in the good directory
foo.js is not in the lookup path of phantomjs
Am I missing something ?
EDIT:
inject() is not revelant because I do not need to inject a JS to an HTML page but instead load my own module like require('fs') but with a relative path.

Answer 1

After a lot of time searching for the same thing, here is what I understood, though I might be wrong :
PhantomJS doesn't use Node's require, but its own require, so things are different
when providing a relative path to phantomjs's require, it is always interpreted as relative to the current working directory
PhantomJS doesn't implement node's __dirname, and as such there is no direct way to have the directory of your script
The solution I found least annoying :
if using phantomjs pure, without casperjs :
require(phantom.libraryPath + '/script/lib/foo.js')
if using casperjs :
var scriptName = fs.absolute( require("system").args[3] );
var scriptDirectory = scriptName.substring(0, scriptName.lastIndexOf('/'));
require(scriptDirectory + '/script/lib/foo.js')

Answer 2

To load your own module, the right way to do it is to use module.exports, like this: foo.js
function bar(text) {
console.log(text);
}
exports.bar = bar
And in script.js (which is executed with phantomjs script.js):
var foo = require('./script/lib/foo');
foo.bar('hello world');
phantom.exit();

Answer 3

My solution to load a resource file (like let's say a json file) within a phantomjs subfolder from a outer folder like in this structure:
├── consumer.js
├── assets
├── data.json
├── loader.js
Supposed that data.json must be load by the consumer module and that this module is called by somewhere else on this machine, outside the project root folder, the fs.workingDirectory will not work, since it will be the path of the caller file.
So to solve this, I did a simple loader module within the assets folder, where the files I want to load are:
(function() {
var loader = {
load : function(fileName) {
var res=require('./'+fileName);
return res;
}
}
module.exports=loader;
}).call(this);
I therefore call the loader module from the consumer module like
var loader=require('./data/loader');
var assets=loader.load('data.json');
and that's it.
NOTE. The require here is the phantomjs require not the node version, so it works a bit differently. In this case the data.json was a json array with no module.exports declaration. The array will be backed in the assets variable directly when calling the loader.load(fileName) method.

Answer 4

have you tried to use injectJs(filename)
excerpt form PhantomJS documentation:
Injects external script code from the specified file. If the file can
not be found in the current directory, libraryPath is used for
additional look up.
This function returns true if injection is successful, otherwise it
returns false.

Answer 5

Which PhantomJS version are you running? Support for user provided modules was added in 1.7.