93 lines
2.4 KiB
TypeScript
93 lines
2.4 KiB
TypeScript
import { memoize } from 'lodash-es'
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export function isAbsolute (path: string): boolean {
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return /^(?:\/|[a-z]:)/i.test(normalize(path))
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}
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function _normalize (path: string): string {
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if (!path) {
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return ''
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}
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// 将路径分隔符替换为斜杠
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path = path.replace(/\\/g, '/')
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// 将多个连续斜杠替换为一个
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path = path.replace(/\/+/g, '/')
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// 处理 .. 和 .
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const parts = path.split('/')
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const newParts = []
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for (let i = 0; i < parts.length; i++) {
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const part = parts[i]
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if (part === '..') {
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newParts.pop()
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} else if (part !== '' && part !== '.') {
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newParts.push(part)
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}
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}
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// 重新组合路径
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const result = newParts.join('/')
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const startWithSlash = path.startsWith('/')
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if (startWithSlash) {
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return '/' + result
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} else {
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return result
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}
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}
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export const normalize = memoize(_normalize)
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export function join (...paths: string[]): string {
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if (!paths.length) {
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return ''
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}
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// 将所有路径组合成一个字符串
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let result = paths.join('/')
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// 规范化路径
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result = normalize(result)
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// 如果原始路径以斜杠结尾，则结果也以斜杠结尾
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const endsWithSlash = paths[paths.length - 1].endsWith('/')
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if (endsWithSlash && !result.endsWith('/')) {
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return result + '/'
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} else {
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return result
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}
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}
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export const normalizeRelativePathToAbsolute = (relativePath: string, cwd: string) => {
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const absolutePath = isAbsolute(relativePath)
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? relativePath
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: normalize(join(cwd, relativePath))
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return normalize(absolutePath)
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}
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export const splitPath = (path: string) => {
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path = normalize(path)
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const frags = path.split('/').filter(v => v)
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if (frags[0].endsWith(':')) {
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frags[0] = frags[0] + '/'// 分割完是c: -> c:/
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}
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return frags
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}
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export function getParentDirectory(filePath: string) {
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const lastSlashIndex = filePath.lastIndexOf('/');
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const lastBackslashIndex = filePath.lastIndexOf('\\');
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const lastSeparatorIndex = Math.max(lastSlashIndex, lastBackslashIndex);
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if (lastSeparatorIndex === -1) {
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return '.';
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}
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return filePath.substring(0, lastSeparatorIndex);
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}
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export function basename(filePath: string) {
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const lastSlashIndex = filePath.lastIndexOf('/');
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const lastBackslashIndex = filePath.lastIndexOf('\\');
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const lastSeparatorIndex = Math.max(lastSlashIndex, lastBackslashIndex);
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if (lastSeparatorIndex === -1) {
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return filePath;
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}
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return filePath.substring(lastSeparatorIndex + 1);
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} |