docusaurus/packages/docusaurus-utils/src/index.ts

220 lines
5.8 KiB
TypeScript

/**
* Copyright (c) 2017-present, Facebook, Inc.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
import path from 'path';
import matter from 'gray-matter';
import {createHash} from 'crypto';
import _ from 'lodash';
import escapeStringRegexp from 'escape-string-regexp';
import fs from 'fs-extra';
const fileHash = new Map();
export async function generate(
generatedFilesDir: string,
file: string,
content: any,
): Promise<void> {
const filepath = path.join(generatedFilesDir, file);
const lastHash = fileHash.get(filepath);
const currentHash = createHash('md5')
.update(content)
.digest('hex');
if (lastHash !== currentHash) {
await fs.ensureDir(path.dirname(filepath));
await fs.writeFile(filepath, content);
fileHash.set(filepath, currentHash);
}
}
const indexRE = /(^|.*\/)index\.(md|js)$/i;
const extRE = /\.(md|js)$/;
/**
* Convert filepath to url path. Example: 'index.md' -> '/', 'foo/bar.js' -> '/foo/bar',
*/
export function fileToPath(file: string): string {
if (indexRE.test(file)) {
return file.replace(indexRE, '/$1');
}
return `/${file.replace(extRE, '').replace(/\\/g, '/')}`;
}
export function encodePath(userpath: string): string {
return userpath
.split('/')
.map(item => encodeURIComponent(item))
.join('/');
}
/**
* Given an input string, convert to kebab-case and append a hash. Avoid str collision
*/
export function docuHash(str: string): string {
if (str === '/') {
return 'index';
}
const shortHash = createHash('md5')
.update(str)
.digest('hex')
.substr(0, 3);
return `${_.kebabCase(str)}-${shortHash}`;
}
/**
* Generate unique React Component Name. E.g: /foo-bar -> FooBar096
*/
export function genComponentName(pagePath: string): string {
if (pagePath === '/') {
return 'index';
}
const pageHash = docuHash(pagePath);
const pascalCase = _.flow(
_.camelCase,
_.upperFirst,
);
return pascalCase(pageHash);
}
/**
* Convert Windows backslash paths to posix style paths. E.g: endi\\lie -> endi/lie
*/
export function posixPath(str: string): string {
const isExtendedLengthPath = /^\\\\\?\\/.test(str);
const hasNonAscii = /[^\u0000-\u0080]+/.test(str); // eslint-disable-line
if (isExtendedLengthPath || hasNonAscii) {
return str;
}
return str.replace(/\\/g, '/');
}
const chunkNameCache = new Map();
/**
* Generate unique chunk name given a module path
*/
export function genChunkName(
modulePath: string,
prefix?: string,
preferredName?: string,
): string {
let chunkName: string | undefined = chunkNameCache.get(modulePath);
if (!chunkName) {
let str = modulePath;
if (preferredName) {
const shortHash = createHash('md5')
.update(modulePath)
.digest('hex')
.substr(0, 3);
str = `${preferredName}${shortHash}`;
}
const name = str === '/' ? 'index' : docuHash(str);
chunkName = prefix ? `${prefix}---${name}` : name;
chunkNameCache.set(modulePath, chunkName);
}
return chunkName;
}
export function idx(target: any, keyPaths?: string | (string | number)[]): any {
return (
target &&
keyPaths &&
(Array.isArray(keyPaths)
? keyPaths.reduce((obj, key) => obj && obj[key], target)
: target[keyPaths])
);
}
/**
* Given a filepath and dirpath, get the first directory
*/
export function getSubFolder(file: string, refDir: string): string | null {
const separator = escapeStringRegexp(path.sep);
const baseDir = escapeStringRegexp(path.basename(refDir));
const regexSubFolder = new RegExp(
`${baseDir}${separator}(.*?)${separator}.*`,
);
const match = regexSubFolder.exec(file);
return match && match[1];
}
export function parse(
fileString: string,
): {
frontMatter: {
[key: string]: any;
};
content: string;
excerpt: string | undefined;
} {
const options: {} = {
excerpt: (file: matter.GrayMatterFile<string>): void => {
file.excerpt = file.content
.trim()
.split('\n', 1)
.shift();
},
};
const {data: frontMatter, content, excerpt} = matter(fileString, options);
return {frontMatter, content, excerpt};
}
export function normalizeUrl(rawUrls: string[]): string {
const urls = rawUrls;
const resultArray = [];
// If the first part is a plain protocol, we combine it with the next part.
if (urls[0].match(/^[^/:]+:\/*$/) && urls.length > 1) {
const first = urls.shift();
urls[0] = first + urls[0];
}
// There must be two or three slashes in the file protocol,
// two slashes in anything else.
const replacement = urls[0].match(/^file:\/\/\//) ? '$1:///' : '$1://';
urls[0] = urls[0].replace(/^([^/:]+):\/*/, replacement);
// eslint-disable-next-line
for (let i = 0; i < urls.length; i++) {
let component = urls[i];
if (typeof component !== 'string') {
throw new TypeError(`Url must be a string. Received ${typeof component}`);
}
if (component === '') {
// eslint-disable-next-line
continue;
}
if (i > 0) {
// Removing the starting slashes for each component but the first.
component = component.replace(/^[/]+/, '');
}
// Removing the ending slashes for each component but the last.
// For the last component we will combine multiple slashes to a single one.
component = component.replace(/[/]+$/, i < urls.length - 1 ? '' : '/');
resultArray.push(component);
}
let str = resultArray.join('/');
// Each input component is now separated by a single slash except the possible first plain protocol part.
// remove trailing slash before parameters or hash
str = str.replace(/\/(\?|&|#[^!])/g, '$1');
// replace ? in parameters with &
const parts = str.split('?');
str = parts.shift() + (parts.length > 0 ? '?' : '') + parts.join('&');
// dedupe forward slashes
str = str.replace(/^\/+/, '/');
return str;
}