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