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@tonybolanyo
Forked from creationix/path.js
Last active November 5, 2017 10:13
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Simple path join and dirname functions for generic javascript
'uses strict';
// Joins path segments. Preserves initial "/" and resolves ".." and "."
// Does not support using ".." to go above/outside the root.
// This means that join("foo", "../../bar") will not resolve to "../bar"
const join = function(/* path segments */) {
// Split the inputs into a list of path commands.
var parts = [];
for (var i = 0, l = arguments.length; i < l; i++) {
parts = parts.concat(arguments[i].split('/'));
}
// Interpret the path commands to get the new resolved path.
var newParts = [];
for (i = 0, l = parts.length; i < l; i++) {
var part = parts[i];
// Remove leading and trailing slashes
// Also remove "." segments
if (!part || part === '.') continue;
// Interpret ".." to pop the last segment
if (part === '..') newParts.pop();
// Push new path segments.
else newParts.push(part);
}
// Preserve the initial slash if there was one.
if (parts[0] === '') newParts.unshift('');
// Turn back into a single string path.
return newParts.join('/') || (newParts.length ? '/' : '.');
};
// A simple function to get the dirname of a path
// Trailing slashes are ignored. Leading slash is preserved.
const dirname = function(path) {
return join(path, '..');
};
module.exports.join = join;
module.exports.path = dirname;
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