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/*!
* strip-dirs | MIT (c) Shinnosuke Watanabe
* https://github.com/shinnn/node-strip-dirs
*/
'use strict';
const path = require('path');
const util = require('util');
const isNaturalNumber = require('is-natural-number');
module.exports = function stripDirs(pathStr, count, option) {
if (typeof pathStr !== 'string') {
throw new TypeError(
util.inspect(pathStr) +
' is not a string. First argument to strip-dirs must be a path string.'
);
}
if (path.posix.isAbsolute(pathStr) || path.win32.isAbsolute(pathStr)) {
throw new Error(`${pathStr} is an absolute path. strip-dirs requires a relative path.`);
}
if (!isNaturalNumber(count, {includeZero: true})) {
throw new Error(
'The Second argument of strip-dirs must be a natural number or 0, but received ' +
util.inspect(count) +
'.'
);
}
if (option) {
if (typeof option !== 'object') {
throw new TypeError(
util.inspect(option) +
' is not an object. Expected an object with a boolean `disallowOverflow` property.'
);
}
if (Array.isArray(option)) {
throw new TypeError(
util.inspect(option) +
' is an array. Expected an object with a boolean `disallowOverflow` property.'
);
}
if ('disallowOverflow' in option && typeof option.disallowOverflow !== 'boolean') {
throw new TypeError(
util.inspect(option.disallowOverflow) +
' is neither true nor false. `disallowOverflow` option must be a Boolean value.'
);
}
} else {
option = {disallowOverflow: false};
}
const pathComponents = path.normalize(pathStr).split(path.sep);
if (pathComponents.length > 1 && pathComponents[0] === '.') {
pathComponents.shift();
}
if (count > pathComponents.length - 1) {
if (option.disallowOverflow) {
throw new RangeError('Cannot strip more directories than there are.');
}
count = pathComponents.length - 1;
}
return path.join.apply(null, pathComponents.slice(count));
};
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