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var path = require('path');
var error = require('./error');
// Normalize a filename
function normalizePath(filename) {
return path.normalize(filename);
}
// Return true if file path is inside a folder
function isInRoot(root, filename) {
root = path.normalize(root);
filename = path.normalize(filename);
if (root === '.') {
return true;
}
if (root[root.length - 1] != path.sep) {
root = root + path.sep;
}
return (filename.substr(0, root.length) === root);
}
// Resolve paths in a specific folder
// Throw error if file is outside this folder
function resolveInRoot(root) {
var input, result;
var args = Array.prototype.slice.call(arguments, 1);
input = args
.reduce(function(current, p) {
// Handle path relative to book root ("/README.md")
if (p[0] == '/' || p[0] == '\\') return p.slice(1);
return current? path.join(current, p) : path.normalize(p);
}, '');
result = path.resolve(root, input);
if (!isInRoot(root, result)) {
throw new error.FileOutOfScopeError({
filename: result,
root: root
});
}
return result;
}
// Chnage extension of a file
function setExtension(filename, ext) {
return path.join(
path.dirname(filename),
path.basename(filename, path.extname(filename)) + ext
);
}
/*
Return true if a filename is relative.
@param {String}
@return {Boolean}
*/
function isPureRelative(filename) {
return (filename.indexOf('./') === 0 || filename.indexOf('../') === 0);
}
module.exports = {
isInRoot: isInRoot,
resolveInRoot: resolveInRoot,
normalize: normalizePath,
setExtension: setExtension,
isPureRelative: isPureRelative
};
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