@angular-devkit/core/src/virtual-fs/path.js

"use strict";
/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
Object.defineProperty(exports, "__esModule", { value: true });
exports.getSystemPath = exports.asPosixPath = exports.asWindowsPath = exports.path = exports.noCacheNormalize = exports.normalize = exports.resetNormalizeCache = exports.fragment = exports.resolve = exports.relative = exports.isAbsolute = exports.join = exports.dirname = exports.basename = exports.extname = exports.split = exports.NormalizedRoot = exports.NormalizedSep = exports.PathCannotBeFragmentException = exports.PathMustBeAbsoluteException = exports.InvalidPathException = void 0;
const exception_1 = require("../exception");
class InvalidPathException extends exception_1.BaseException {
    constructor(path) {
        super(`Path ${JSON.stringify(path)} is invalid.`);
    }
}
exports.InvalidPathException = InvalidPathException;
class PathMustBeAbsoluteException extends exception_1.BaseException {
    constructor(path) {
        super(`Path ${JSON.stringify(path)} must be absolute.`);
    }
}
exports.PathMustBeAbsoluteException = PathMustBeAbsoluteException;
class PathCannotBeFragmentException extends exception_1.BaseException {
    constructor(path) {
        super(`Path ${JSON.stringify(path)} cannot be made a fragment.`);
    }
}
exports.PathCannotBeFragmentException = PathCannotBeFragmentException;
/**
 * The Separator for normalized path.
 * @type {Path}
 */
exports.NormalizedSep = '/';
/**
 * The root of a normalized path.
 * @type {Path}
 */
exports.NormalizedRoot = exports.NormalizedSep;
/**
 * Split a path into multiple path fragments. Each fragments except the last one will end with
 * a path separator.
 * @param {Path} path The path to split.
 * @returns {Path[]} An array of path fragments.
 */
function split(path) {
    const fragments = path.split(exports.NormalizedSep).map((x) => fragment(x));
    if (fragments[fragments.length - 1].length === 0) {
        fragments.pop();
    }
    return fragments;
}
exports.split = split;
/**
 *
 */
function extname(path) {
    const base = basename(path);
    const i = base.lastIndexOf('.');
    if (i < 1) {
        return '';
    }
    else {
        return base.slice(i);
    }
}
exports.extname = extname;
/**
 * Return the basename of the path, as a Path. See path.basename
 */
function basename(path) {
    const i = path.lastIndexOf(exports.NormalizedSep);
    if (i == -1) {
        return fragment(path);
    }
    else {
        return fragment(path.slice(path.lastIndexOf(exports.NormalizedSep) + 1));
    }
}
exports.basename = basename;
/**
 * Return the dirname of the path, as a Path. See path.dirname
 */
function dirname(path) {
    const index = path.lastIndexOf(exports.NormalizedSep);
    if (index === -1) {
        return '';
    }
    const endIndex = index === 0 ? 1 : index; // case of file under root: '/file'
    return normalize(path.slice(0, endIndex));
}
exports.dirname = dirname;
/**
 * Join multiple paths together, and normalize the result. Accepts strings that will be
 * normalized as well (but the original must be a path).
 */
function join(p1, ...others) {
    if (others.length > 0) {
        return normalize((p1 ? p1 + exports.NormalizedSep : '') + others.join(exports.NormalizedSep));
    }
    else {
        return p1;
    }
}
exports.join = join;
/**
 * Returns true if a path is absolute.
 */
function isAbsolute(p) {
    return p.startsWith(exports.NormalizedSep);
}
exports.isAbsolute = isAbsolute;
/**
 * Returns a path such that `join(from, relative(from, to)) == to`.
 * Both paths must be absolute, otherwise it does not make much sense.
 */
function relative(from, to) {
    if (!isAbsolute(from)) {
        throw new PathMustBeAbsoluteException(from);
    }
    if (!isAbsolute(to)) {
        throw new PathMustBeAbsoluteException(to);
    }
    let p;
    if (from == to) {
        p = '';
    }
    else {
        const splitFrom = split(from);
        const splitTo = split(to);
        while (splitFrom.length > 0 && splitTo.length > 0 && splitFrom[0] == splitTo[0]) {
            splitFrom.shift();
            splitTo.shift();
        }
        if (splitFrom.length == 0) {
            p = splitTo.join(exports.NormalizedSep);
        }
        else {
            p = splitFrom
                .map(() => '..')
                .concat(splitTo)
                .join(exports.NormalizedSep);
        }
    }
    return normalize(p);
}
exports.relative = relative;
/**
 * Returns a Path that is the resolution of p2, from p1. If p2 is absolute, it will return p2,
 * otherwise will join both p1 and p2.
 */
function resolve(p1, p2) {
    if (isAbsolute(p2)) {
        return p2;
    }
    else {
        return join(p1, p2);
    }
}
exports.resolve = resolve;
function fragment(path) {
    if (path.indexOf(exports.NormalizedSep) != -1) {
        throw new PathCannotBeFragmentException(path);
    }
    return path;
}
exports.fragment = fragment;
/**
 * normalize() cache to reduce computation. For now this grows and we never flush it, but in the
 * future we might want to add a few cache flush to prevent this from growing too large.
 */
let normalizedCache = new Map();
/**
 * Reset the cache. This is only useful for testing.
 * @private
 */
function resetNormalizeCache() {
    normalizedCache = new Map();
}
exports.resetNormalizeCache = resetNormalizeCache;
/**
 * Normalize a string into a Path. This is the only mean to get a Path type from a string that
 * represents a system path. This method cache the results as real world paths tend to be
 * duplicated often.
 * Normalization includes:
 *   - Windows backslashes `\\` are replaced with `/`.
 *   - Windows drivers are replaced with `/X/`, where X is the drive letter.
 *   - Absolute paths starts with `/`.
 *   - Multiple `/` are replaced by a single one.
 *   - Path segments `.` are removed.
 *   - Path segments `..` are resolved.
 *   - If a path is absolute, having a `..` at the start is invalid (and will throw).
 * @param path The path to be normalized.
 */
function normalize(path) {
    let maybePath = normalizedCache.get(path);
    if (!maybePath) {
        maybePath = noCacheNormalize(path);
        normalizedCache.set(path, maybePath);
    }
    return maybePath;
}
exports.normalize = normalize;
/**
 * The no cache version of the normalize() function. Used for benchmarking and testing.
 */
function noCacheNormalize(path) {
    if (path == '' || path == '.') {
        return '';
    }
    else if (path == exports.NormalizedRoot) {
        return exports.NormalizedRoot;
    }
    // Match absolute windows path.
    const original = path;
    if (path.match(/^[A-Z]:[/\\]/i)) {
        path = '\\' + path[0] + '\\' + path.slice(3);
    }
    // We convert Windows paths as well here.
    const p = path.split(/[/\\]/g);
    let relative = false;
    let i = 1;
    // Special case the first one.
    if (p[0] != '') {
        p.unshift('.');
        relative = true;
    }
    while (i < p.length) {
        if (p[i] == '.') {
            p.splice(i, 1);
        }
        else if (p[i] == '..') {
            if (i < 2 && !relative) {
                throw new InvalidPathException(original);
            }
            else if (i >= 2 && p[i - 1] != '..') {
                p.splice(i - 1, 2);
                i--;
            }
            else {
                i++;
            }
        }
        else if (p[i] == '') {
            p.splice(i, 1);
        }
        else {
            i++;
        }
    }
    if (p.length == 1) {
        return p[0] == '' ? exports.NormalizedSep : '';
    }
    else {
        if (p[0] == '.') {
            p.shift();
        }
        return p.join(exports.NormalizedSep);
    }
}
exports.noCacheNormalize = noCacheNormalize;
const path = (strings, ...values) => {
    return normalize(String.raw(strings, ...values));
};
exports.path = path;
function asWindowsPath(path) {
    const drive = path.match(/^\/(\w)(?:\/(.*))?$/);
    if (drive) {
        const subPath = drive[2] ? drive[2].replace(/\//g, '\\') : '';
        return `${drive[1]}:\\${subPath}`;
    }
    return path.replace(/\//g, '\\');
}
exports.asWindowsPath = asWindowsPath;
function asPosixPath(path) {
    return path;
}
exports.asPosixPath = asPosixPath;
function getSystemPath(path) {
    if (process.platform.startsWith('win32')) {
        return asWindowsPath(path);
    }
    else {
        return asPosixPath(path);
    }
}
exports.getSystemPath = getSystemPath;
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* @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport { BaseException } from '../exception';\nimport { TemplateTag } from '../utils/literals';\n\nexport class InvalidPathException extends BaseException {\n  constructor(path: string) {\n    super(`Path ${JSON.stringify(path)} is invalid.`);\n  }\n}\nexport class PathMustBeAbsoluteException extends BaseException {\n  constructor(path: string) {\n    super(`Path ${JSON.stringify(path)} must be absolute.`);\n  }\n}\nexport class PathCannotBeFragmentException extends BaseException {\n  constructor(path: string) {\n    super(`Path ${JSON.stringify(path)} cannot be made a fragment.`);\n  }\n}\n\n/**\n * A Path recognized by most methods in the DevKit.\n */\nexport type Path = string & {\n  __PRIVATE_DEVKIT_PATH: void;\n};\n\n/**\n * A Path fragment (file or directory name) recognized by 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Each fragments except the last one will end with\n * a path separator.\n * @param {Path} path The path to split.\n * @returns {Path[]} An array of path fragments.\n */\nexport function split(path: Path): PathFragment[] {\n  const fragments = path.split(NormalizedSep).map((x) => fragment(x));\n  if (fragments[fragments.length - 1].length === 0) {\n    fragments.pop();\n  }\n\n  return fragments;\n}\n\n/**\n *\n */\nexport function extname(path: Path): string {\n  const base = basename(path);\n  const i = base.lastIndexOf('.');\n  if (i < 1) {\n    return '';\n  } else {\n    return base.slice(i);\n  }\n}\n\n/**\n * Return the basename of the path, as a Path. See path.basename\n */\nexport function basename(path: Path): PathFragment {\n  const i = path.lastIndexOf(NormalizedSep);\n  if (i == -1) {\n    return fragment(path);\n  } else {\n    return fragment(path.slice(path.lastIndexOf(NormalizedSep) + 1));\n  }\n}\n\n/**\n * Return the dirname of the path, as a Path. See path.dirname\n */\nexport function dirname(path: Path): Path {\n  const index = path.lastIndexOf(NormalizedSep);\n  if (index === -1) {\n    return '' as Path;\n  }\n\n  const endIndex = index === 0 ? 1 : index; // case of file under root: '/file'\n\n  return normalize(path.slice(0, endIndex));\n}\n\n/**\n * Join multiple paths together, and normalize the result. Accepts strings that will be\n * normalized as well (but the original must be a path).\n */\nexport function join(p1: Path, ...others: string[]): Path {\n  if (others.length > 0) {\n    return normalize((p1 ? p1 + NormalizedSep : '') + others.join(NormalizedSep));\n  } else {\n    return p1;\n  }\n}\n\n/**\n * Returns true if a path is absolute.\n */\nexport function isAbsolute(p: Path) {\n  return p.startsWith(NormalizedSep);\n}\n\n/**\n * Returns a path such that `join(from, relative(from, to)) == to`.\n * Both paths must be absolute, otherwise it does not make much sense.\n */\nexport function relative(from: Path, to: Path): Path {\n  if (!isAbsolute(from)) {\n    throw new PathMustBeAbsoluteException(from);\n  }\n  if (!isAbsolute(to)) {\n    throw new PathMustBeAbsoluteException(to);\n  }\n\n  let p: string;\n\n  if (from == to) {\n    p = '';\n  } else {\n    const splitFrom = split(from);\n    const splitTo = split(to);\n\n    while (splitFrom.length > 0 && splitTo.length > 0 && splitFrom[0] == splitTo[0]) {\n      splitFrom.shift();\n      splitTo.shift();\n    }\n\n    if (splitFrom.length == 0) {\n      p = splitTo.join(NormalizedSep);\n    } else {\n      p = splitFrom\n        .map(() => '..')\n        .concat(splitTo)\n        .join(NormalizedSep);\n    }\n  }\n\n  return normalize(p);\n}\n\n/**\n * Returns a Path that is the resolution of p2, from p1. If p2 is absolute, it will return p2,\n * otherwise will join both p1 and p2.\n */\nexport function resolve(p1: Path, p2: Path) {\n  if (isAbsolute(p2)) {\n    return p2;\n  } else {\n    return join(p1, p2);\n  }\n}\n\nexport function fragment(path: string): PathFragment {\n  if (path.indexOf(NormalizedSep) != -1) {\n    throw new PathCannotBeFragmentException(path);\n  }\n\n  return path as PathFragment;\n}\n\n/**\n * normalize() cache to reduce computation. For now this grows and we never flush it, but in the\n * future we might want to add a few cache flush to prevent this from growing too large.\n */\nlet normalizedCache = new Map<string, Path>();\n\n/**\n * Reset the cache. This is only useful for testing.\n * @private\n */\nexport function resetNormalizeCache() {\n  normalizedCache = new Map<string, Path>();\n}\n\n/**\n * Normalize a string into a Path. This is the only mean to get a Path type from a string that\n * represents a system path. This method cache the results as real world paths tend to be\n * duplicated often.\n * Normalization includes:\n *   - Windows backslashes `\\\\` are replaced with `/`.\n *   - Windows drivers are replaced with `/X/`, where X is the drive letter.\n *   - Absolute paths starts with `/`.\n *   - Multiple `/` are replaced by a single one.\n *   - Path segments `.` are removed.\n *   - Path segments `..` are resolved.\n *   - If a path is absolute, having a `..` at the start is invalid (and will throw).\n * @param path The path to be normalized.\n */\nexport function normalize(path: string): Path {\n  let maybePath = normalizedCache.get(path);\n  if (!maybePath) {\n    maybePath = noCacheNormalize(path);\n    normalizedCache.set(path, maybePath);\n  }\n\n  return maybePath;\n}\n\n/**\n * The no cache version of the normalize() function. Used for benchmarking and testing.\n */\nexport function noCacheNormalize(path: string): Path {\n  if (path == '' || path == '.') {\n    return '' as Path;\n  } else if (path == NormalizedRoot) {\n    return NormalizedRoot;\n  }\n\n  // Match absolute windows path.\n  const original = path;\n  if (path.match(/^[A-Z]:[/\\\\]/i)) {\n    path = '\\\\' + path[0] + '\\\\' + path.slice(3);\n  }\n\n  // We convert Windows paths as well here.\n  const p = path.split(/[/\\\\]/g);\n  let relative = false;\n  let i = 1;\n\n  // Special case the first one.\n  if (p[0] != '') {\n    p.unshift('.');\n    relative = true;\n  }\n\n  while (i < p.length) {\n    if (p[i] == '.') {\n      p.splice(i, 1);\n    } else if (p[i] == '..') {\n      if (i < 2 && !relative) {\n        throw new InvalidPathException(original);\n      } else if (i >= 2 && p[i - 1] != '..') {\n        p.splice(i - 1, 2);\n        i--;\n      } else {\n        i++;\n      }\n    } else if (p[i] == '') {\n      p.splice(i, 1);\n    } else {\n      i++;\n    }\n  }\n\n  if (p.length == 1) {\n    return p[0] == '' ? NormalizedSep : ('' as Path);\n  } else {\n    if (p[0] == '.') {\n      p.shift();\n    }\n\n    return p.join(NormalizedSep) as Path;\n  }\n}\n\nexport const path: TemplateTag<Path> = (strings, ...values) => {\n  return normalize(String.raw(strings, ...values));\n};\n\n// Platform-specific paths.\nexport type WindowsPath = string & {\n  __PRIVATE_DEVKIT_WINDOWS_PATH: void;\n};\nexport type PosixPath = string & {\n  __PRIVATE_DEVKIT_POSIX_PATH: void;\n};\n\nexport function asWindowsPath(path: Path): WindowsPath {\n  const drive = path.match(/^\\/(\\w)(?:\\/(.*))?$/);\n  if (drive) {\n    const subPath = drive[2] ? drive[2].replace(/\\//g, '\\\\') : '';\n\n    return `${drive[1]}:\\\\${subPath}` as WindowsPath;\n  }\n\n  return path.replace(/\\//g, '\\\\') as WindowsPath;\n}\n\nexport function asPosixPath(path: Path): PosixPath {\n  return path as string as PosixPath;\n}\n\nexport function getSystemPath(path: Path): string {\n  if (process.platform.startsWith('win32')) {\n    return asWindowsPath(path);\n  } else {\n    return asPosixPath(path);\n  }\n}\n"]}