mjz update
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172
vdoing/node_utils/setFrontmatter.js
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172
vdoing/node_utils/setFrontmatter.js
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const fs = require('fs'); // 文件模块
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const matter = require('gray-matter'); // FrontMatter解析器 https://github.com/jonschlinkert/gray-matter
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const jsonToYaml = require('json2yaml')
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const chalk = require('chalk') // 命令行打印美化
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// const arg = process.argv.splice(2)[0]; // 获取命令行传入的参数
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const readFileList = require('./modules/readFileList');
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const { type, repairDate, dateFormat } = require('./modules/fn');
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const log = console.log
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const path = require('path');
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const os = require('os');
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const PREFIX = '/pages/'
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/**
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* 给.md文件设置frontmatter(标题、日期、永久链接等数据)
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*/
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function setFrontmatter(sourceDir, themeConfig) {
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const { category: isCategory, tag: isTag, categoryText = '随笔', extendFrontmatter } = themeConfig
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const files = readFileList(sourceDir) // 读取所有md文件数据
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// 扩展自定义生成frontmatter
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const extendFrontmatterStr = extendFrontmatter ?
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jsonToYaml.stringify(extendFrontmatter)
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.replace(/\n\s{2}/g, "\n")
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.replace(/"|---\n/g, "")
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: '';
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files.forEach(file => {
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let dataStr = fs.readFileSync(file.filePath, 'utf8');// 读取每个md文件内容
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// fileMatterObj => {content:'剔除frontmatter后的文件内容字符串', data:{<frontmatter对象>}, ...}
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const fileMatterObj = matter(dataStr, {});
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if (Object.keys(fileMatterObj.data).length === 0) { // 未定义FrontMatter数据
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const stat = fs.statSync(file.filePath);
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const dateStr = dateFormat(
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getBirthtime(stat)
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); // 文件的创建时间
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const categories = getCategories(
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file,
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categoryText
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);
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let cateLabelStr = '';
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categories.forEach(item => {
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cateLabelStr += os.EOL + ' - ' + item
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});
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let cateStr = '';
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if (!(isCategory === false)) {
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cateStr = os.EOL + 'categories:' + cateLabelStr
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};
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// 注意下面这些反引号字符串的格式会映射到文件
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const tagsStr = isTag === false ? '' : `
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tags:
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- `;
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const fmData = `---
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title: ${file.name}
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date: ${dateStr}
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permalink: ${getPermalink()}${file.filePath.indexOf('_posts') > -1 ? os.EOL + 'sidebar: auto' : ''}${cateStr}${tagsStr}
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${extendFrontmatterStr}---`;
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fs.writeFileSync(file.filePath, `${fmData}${os.EOL}${fileMatterObj.content}`); // 写入
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log(chalk.blue('tip ') + chalk.green(`write frontmatter(写入frontmatter):${file.filePath} `))
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} else { // 已有FrontMatter
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let matterData = fileMatterObj.data;
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let hasChange = false;
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// 已有FrontMatter,但是没有title、date、permalink、categories、tags数据的
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if (!matterData.hasOwnProperty('title')) { // 标题
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matterData.title = file.name;
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hasChange = true;
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}
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if (!matterData.hasOwnProperty('date')) { // 日期
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const stat = fs.statSync(file.filePath);
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matterData.date = dateFormat(getBirthtime(stat));
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hasChange = true;
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}
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if (!matterData.hasOwnProperty('permalink')) { // 永久链接
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matterData.permalink = getPermalink();
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hasChange = true;
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}
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if (file.filePath.indexOf('_posts') > -1 && !matterData.hasOwnProperty('sidebar')) { // auto侧边栏,_posts文件夹特有
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matterData.sidebar = "auto";
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hasChange = true;
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}
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if (!matterData.hasOwnProperty('pageComponent') && matterData.article !== false) { // 是文章页才添加分类和标签
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if (isCategory !== false && !matterData.hasOwnProperty('categories')) { // 分类
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matterData.categories = getCategories(file, categoryText)
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hasChange = true;
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}
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if (isTag !== false && !matterData.hasOwnProperty('tags')) { // 标签
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matterData.tags = [''];
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hasChange = true;
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}
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}
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// 扩展自动生成frontmatter的字段
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if (type(extendFrontmatter) === 'object') {
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Object.keys(extendFrontmatter).forEach(keyName => {
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if (!matterData.hasOwnProperty(keyName)) {
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matterData[keyName] = extendFrontmatter[keyName]
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hasChange = true;
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}
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})
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}
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if (hasChange) {
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if (matterData.date && type(matterData.date) === 'date') {
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matterData.date = repairDate(matterData.date) // 修复时间格式
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}
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const newData = jsonToYaml.stringify(matterData).replace(/\n\s{2}/g, "\n").replace(/"/g, "") + '---' + os.EOL + fileMatterObj.content;
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fs.writeFileSync(file.filePath, newData); // 写入
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log(chalk.blue('tip ') + chalk.green(`write frontmatter(写入frontmatter):${file.filePath} `))
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}
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}
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})
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}
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// 获取分类数据
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function getCategories(file, categoryText) {
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let categories = []
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if (file.filePath.indexOf('_posts') === -1) {
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// 不在_posts文件夹
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let filePathArr = file.filePath.split(path.sep) // path.sep用于兼容不同系统下的路径斜杠
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filePathArr.pop()
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let ind = filePathArr.indexOf('docs')
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if (ind !== -1) {
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while (filePathArr[++ind] !== undefined) {
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const item = filePathArr[ind]
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const firstDotIndex = item.indexOf('.');
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categories.push(item.substring(firstDotIndex + 1) || '') // 获取分类
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// categories.push(filePathArr[ind].split('.').pop()) // 获取分类
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}
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}
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} else {
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// 碎片化文章的分类生成
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const matchResult = file.filePath.match(/_posts\/(\S*)\//);
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const resultStr = matchResult ? matchResult[1] : ''
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const resultArr = resultStr.split('/').filter(Boolean)
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if (resultArr.length) {
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categories.push(...resultArr)
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} else {
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categories.push(categoryText)
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}
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}
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return categories
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}
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// 获取文件创建时间
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function getBirthtime(stat) {
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// 在一些系统下无法获取birthtime属性的正确时间,使用atime代替
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return stat.birthtime.getFullYear() != 1970 ? stat.birthtime : stat.atime
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}
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// 定义永久链接数据
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function getPermalink() {
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return `${PREFIX + (Math.random() + Math.random()).toString(16).slice(2, 8)}/`
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}
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module.exports = setFrontmatter;
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