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utils.js
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utils.js
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const fs = require('fs')
const TOML = require('@iarna/toml')
const path = require('path')
exports.parse = function (content) {
return TOML.parse(content)
}
exports.stringify = function (content) {
return TOML.stringify(content)
}
exports.file = function (...args) {
args = args.filter(function (arg) { return arg != null })
// path.join breaks if it's a not a string, so just skip this.
for (const v of args) {
if (typeof v !== 'string') return
}
var file = path.join(...args)
try {
return fs.readFileSync(file, 'utf-8')
} catch (err) {}
}
exports.env = function (prefix, env) {
env = env || process.env
var obj = {}
var l = prefix.length
for (var k of Object.keys(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
}
exports.find = function (...args) {
var rel = path.join(...args)
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)
}