File size: 1,912 Bytes
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/* ------------------------------------------------------------------------ */
const isBrowser = (typeof window !== 'undefined') && (window.window === window) && window.navigator
const cwd = isBrowser ? window.location.href : process.cwd ()
const urlRegexp = new RegExp ("^((https|http)://)?[a-z0-9A-Z]{3}\.[a-z0-9A-Z][a-z0-9A-Z]{0,61}?[a-z0-9A-Z]\.com|net|cn|cc (:s[0-9]{1-4})?/$")
/* ------------------------------------------------------------------------ */
const path = module.exports = {
concat (a, b) {
const a_endsWithSlash = (a[a.length - 1] === '/'),
b_startsWithSlash = (b[0] === '/')
return a + ((a_endsWithSlash || b_startsWithSlash) ? '' : '/') +
((a_endsWithSlash && b_startsWithSlash) ? b.substring (1) : b)
},
resolve (x) {
if (path.isAbsolute (x)) {
return path.normalize (x) }
return path.normalize (path.concat (cwd, x))
},
normalize (x) {
let output = [],
skip = 0
x.split ('/').reverse ().filter (x => x !== '.').forEach (x => {
if (x === '..') { skip++ }
else if (skip === 0) { output.push (x) }
else { skip-- }
})
const result = output.reverse ().join ('/')
return ((isBrowser && (result[0] === '/')) ? result[1] === '/' ? window.location.protocol : window.location.origin : '') + result
},
isData: x => x.indexOf ('data:') === 0,
isURL: x => urlRegexp.test (x),
isAbsolute: x => (x[0] === '/') || /^[^\/]*:/.test (x),
relativeToFile (a, b) {
return (path.isData (a) || path.isAbsolute (b)) ?
path.normalize (b) :
path.normalize (path.concat (a.split ('/').slice (0, -1).join ('/'), b))
}
}
/* ------------------------------------------------------------------------ */
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