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define([], function() {
// 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"
function join(/* 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.
function dirname(path) {
return join(path, "..");
}
// test if a path or url is absolute
function isAbsolute(path) {
if (!path) return false;
return (path[0] == "/" || path.indexOf("http://") == 0 || path.indexOf("https://") == 0);
}
return {
dirname: dirname,
join: join,
isAbsolute: isAbsolute
};
})
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