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'use strict';
var fs = require('fs')
var ini = require('ini')
var path = require('path')
var stripJsonComments = require('strip-json-comments')
var parse = exports.parse = function (content) {
//if it ends in .json or starts with { then it must be json.
//must be done this way, because ini accepts everything.
//can't just try and parse it and let it throw if it's not ini.
//everything is ini. even json with a syntax error.
if(/^\s*{/.test(content))
return JSON.parse(stripJsonComments(content))
return ini.parse(content)
}
var file = exports.file = function () {
var args = [].slice.call(arguments).filter(function (arg) { return arg != null })
//path.join breaks if it's a not a string, so just skip this.
for(var i in args)
if('string' !== typeof args[i])
return
var file = path.join.apply(null, args)
var content
try {
return fs.readFileSync(file,'utf-8')
} catch (err) {
return
}
}
var json = exports.json = function () {
var content = file.apply(null, arguments)
return content ? parse(content) : null
}
var env = exports.env = function (prefix, env) {
env = env || process.env
var obj = {}
var l = prefix.length
for(var k in env) {
if(k.toLowerCase().indexOf(prefix.toLowerCase()) === 0) {
var keypath = k.substring(l).split('__')
// Trim empty strings from keypath array
var _emptyStringIndex
while ((_emptyStringIndex=keypath.indexOf('')) > -1) {
keypath.splice(_emptyStringIndex, 1)
}
var cursor = obj
keypath.forEach(function _buildSubObj(_subkey,i){
// (check for _subkey first so we ignore empty strings)
// (check for cursor to avoid assignment to primitive objects)
if (!_subkey || typeof cursor !== 'object')
return
// If this is the last key, just stuff the value in there
// Assigns actual value from env variable to final key
// (unless it's just an empty string- in that case use the last valid key)
if (i === keypath.length-1)
cursor[_subkey] = env[k]
// Build sub-object if nothing already exists at the keypath
if (cursor[_subkey] === undefined)
cursor[_subkey] = {}
// Increment cursor used to track the object at the current depth
cursor = cursor[_subkey]
})
}
}
return obj
}
var find = exports.find = function () {
var rel = path.join.apply(null, [].slice.call(arguments))
function find(start, rel) {
var file = path.join(start, rel)
try {
fs.statSync(file)
return file
} catch (err) {
if(path.dirname(start) !== start) // root
return find(path.dirname(start), rel)
}
}
return find(process.cwd(), rel)
}
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