gulp实现.md文件转化成html文档或pdf

场景

在做项目的时候我们有时候会习惯性的做一些说明.md的文档，大部分都是一个模块一个.md文件，当项目大的时候这样的文件也就多了，我们就不能直观的看到项目一些说明信息，那么是否可以直接把这些文件合并成一个html文件或者pdf可以直接浏览？

实现

首先我们新建个文件夹 markdown 然后执行 cnpm init 创建package.json文件

安装以下依赖包

• gulp
• gulp-clean - 清除文件
• gulp-concat - 文件合并
• gulp-header - 为生成的html文件添加头部
• gulp-markdown - 将.md文件转化为html文件
• gulp-markdown-pdf - 将.md文件转化为pdf文件
• gulp-rename - 为生成后的文件重命名

美化生成的html文件

• 通过gulp-markdown打包后的html文件是没有头部和底部的，这个时候我们可以通过gulp-header来弥补这个不足，也可以让页面美化

• 新建css文件
  样式1

* {
    font-size: 16px;
    font-family: 幼圆;
}

body {
    background-color: #FDF6E3;
    line-height: 1.5em;
    max-width: 960px;
    margin: 0 auto;
    padding: 30px 0;
}

/* !important的作用是提高指定样式规则的应用优先权。*/
body > *:first-child {
    margin-top: 0 !important;
}

body > *:last-child {
    margin-bottom: 0 !important;
}

/* <tt> 标签与 <code> 和 <kbd> 标签一样，<tt> 标签和必
需的 </tt> 结束标签告诉浏览器，要把其中包含的文本显示
为等宽字体。*/

/* 标题 h1~h2*/
/* ====================================================*/
h1 {
    font-size: 2.8em;
    color: #d33682;
    margin: 0.75em;
}

h2 {
    font-size: 2.4em;
    color: #9B31EA;
    margin: 0.75em;

}

h3 {
    font-size: 1.8em;
    color: #338000;
    margin: 0.75em;
}

h4 {
    font-size: 1.4em;
    margin: 0.75em;
}

/* p,a,,hr,list,table*/

/* ==================================================*/
/*<blockquote> 标签定义摘自另一个源的块引用。浏览器
通常会对 <blockquote> 元素进行缩进。
*/
blockquote {
    font-style: italic;
    border-left: 5px solid;
    margin-left: 2em;
    padding-left: 1em;
}

/* p*/
p {
    margin-bottom: 1.5em;
}

/* hr */
hr {
    clear: both;
    margin: 15px 0;
    height: 0px;
    overflow: hidden;
    border: none;
    background: transparent;
    border-bottom: 4px solid #ddd;
    padding: 0;
}

/*  link*/

a {
    color: #b58900;
    text-decoration: none;
}

a:focus {
    outline: thin dotted;
}

a:active,
a:hover {
    outline: 0;
}

a:hover {
    color: #cb4b16;
    text-decoration: underline;
}

a:visited {
    color: #cb4b16;
}

/* list */

ul,
ol {
    margin: 0 0 1.5em 1.5em;
}

ol li {
    list-style-type: decimal;
    list-style-position: outside;
}

ul li {
    list-style-type: disc;
    list-style-position: outside;
}

/* tables */

table thead,
table tr {
    border-top-width: 1px;
    border-top-style: solid;
    border-top-color: rgb(235, 242, 224);
}

table {
    border-bottom-width: 1px;
    border-bottom-style: solid;
    border-bottom-color: rgb(235, 242, 224);
}

thead,
table td:nth-child(1) {
    font-weight: bold;
    color: #7034ca;
}

/* Padding and font style */
table td,
table th {
    padding: 5px 10px;
    font-size: 12px;
    font-family: Verdana;
    color: rgb(149, 170, 109);
}

/* Alternating background colors */
table tr:nth-child(even) {
    background: rgb(230, 238, 214)
}

table tr:nth-child(odd) {
    background: #FFF
}

/* code */
/* =======================================*/
pre {
    margin-left: auto;
    margin-right: auto;
    padding: 20px;
    line-height: 1.2;
    color: #FFF;
    background: #111;
    border-radius: 20px;
}

pre,
code,
tt {
    font-size: 12px;
    font-family: Consolas, "Liberation Mono", Courier, monospace;
}

code,
tt {
    margin: 0 0px;
    padding: 0px 0px;
    white-space: pre-wrap;
    border: 1px solid #eaeaea;
    background-color: #f8f8f8;
    border-radius: 3px;
}

pre > code {
    margin: 0;
    padding: 0;
    white-space: pre-wrap;
    font-size: 16px;
    border: none;
    background: transparent;
    color: #a6e22e;
    font-family: Consolas, "Courier New", Courier, FreeMono, monospace;
    background: #111;
    border-radius: 2px;
}

pre code,
pre tt {
    background-color: transparent;
    border: none;
    word-break: break-all;
}

/*目录形成的范围*/
#outline-list {
    height: 325px;
    position: fixed;
    overflow-y: scroll;
    overflow-x: hidden;
    bottom: 80px;
    right: 15px;
    width: 220px;
}

/* 设置滚动条的样式 */
::-webkit-scrollbar {
    width: 12px;
}

/* 滚动槽 */
::-webkit-scrollbar-track {
    -webkit-box-shadow: inset006pxrgba(0, 0, 0, 0.3);
    border-radius: 10px;
}

/* 滚动条滑块 */
::-webkit-scrollbar-thumb {
    border-radius: 10px;
    background: rgba(0, 0, 0, 0.1);
    -webkit-box-shadow: inset006pxrgba(0, 0, 0, 0.5);
}

::-webkit-scrollbar-thumb:window-inactive {
    background: rgba(255, 0, 0, 0.4);
}

样式2

/* RESET
=============================================================================*/

html, body, div, span, applet, object, iframe, h1, h2, h3, h4, h5, h6, p, blockquote, pre, a, abbr, acronym, address, big, cite, code, del, dfn, em, img, ins, kbd, q, s, samp, small, strike, strong, sub, sup, tt, var, b, u, i, center, dl, dt, dd, ol, ul, li, fieldset, form, label, legend, table, caption, tbody, tfoot, thead, tr, th, td, article, aside, canvas, details, embed, figure, figcaption, footer, header, hgroup, menu, nav, output, ruby, section, summary, time, mark, audio, video {
    margin: 0;
    padding: 0;
    border: 0;
}

/* 设置滚动条的样式 */
::-webkit-scrollbar {
    width:12px;
}
/* 滚动槽 */
::-webkit-scrollbar-track {
    -webkit-box-shadow:inset006pxrgba(0,0,0,0.3);
    border-radius:10px;
}
/* 滚动条滑块 */
::-webkit-scrollbar-thumb {
    border-radius:10px;
    background:rgba(0,0,0,0.1);
    -webkit-box-shadow:inset006pxrgba(0,0,0,0.5);
}
::-webkit-scrollbar-thumb:window-inactive {
    background:rgba(255,0,0,0.4);
}

/* BODY
=============================================================================*/

body {
    font-family: Helvetica, arial, freesans, clean, sans-serif;
    font-size: 14px;
    line-height: 1.6;
    color: #333;
    background-color: #FDF6E3;
    padding: 20px;
    max-width: 960px;
    margin: 0 auto;
}

body>*:first-child {
    margin-top: 0 !important;
}

body>*:last-child {
    margin-bottom: 0 !important;
}

/* BLOCKS
=============================================================================*/

p, blockquote, ul, ol, dl, table, pre {
    margin: 15px 0;
}

/* HEADERS
=============================================================================*/

h1, h2, h3, h4, h5, h6 {
    margin: 20px 0 10px;
    padding: 0;
    font-weight: bold;
    -webkit-font-smoothing: antialiased;
}

h1 tt, h1 code, h2 tt, h2 code, h3 tt, h3 code, h4 tt, h4 code, h5 tt, h5 code, h6 tt, h6 code {
    font-size: inherit;
}
h4,
h5,
h6 {
    color: #859900;
}
h1 {
    font-size: 2.8em;
    color: #d33682;
}
h2 {
    font-size: 2.4em;
    color: #9B31EA;

}
h3 {
    font-size: 1.8em;
    color: #338000;
}
h4 {
    font-size: 1.4em;
}
h5 {
    font-size: 1.3em;
}
h6 {
    font-size: 1.15em;
}

body>h2:first-child, body>h1:first-child, body>h1:first-child+h2, body>h3:first-child, body>h4:first-child, body>h5:first-child, body>h6:first-child {
    margin-top: 0;
    padding-top: 0;
}

a:first-child h1, a:first-child h2, a:first-child h3, a:first-child h4, a:first-child h5, a:first-child h6 {
    margin-top: 0;
    padding-top: 0;
}

h1+p, h2+p, h3+p, h4+p, h5+p, h6+p {
    margin-top: 10px;
}

/* LINKS
=============================================================================*/

a {
    color: #b58900;
    text-decoration: none;
}
a:focus {
    outline: thin dotted;
}
a:active,
a:hover {
    outline: 0;
}
a:hover {
    color: #cb4b16;
    text-decoration: underline;
}
a:visited {
    color: #cb4b16;
}

/* LISTS
=============================================================================*/

ul, ol {
    padding-left: 30px;
}

ul li > :first-child,
ol li > :first-child,
ul li ul:first-of-type,
ol li ol:first-of-type,
ul li ol:first-of-type,
ol li ul:first-of-type {
    margin-top: 0px;
}

ul ul, ul ol, ol ol, ol ul {
    margin-bottom: 0;
}

dl {
    padding: 0;
}

dl dt {
    font-size: 14px;
    font-weight: bold;
    font-style: italic;
    padding: 0;
    margin: 15px 0 5px;
}

dl dt:first-child {
    padding: 0;
}

dl dt>:first-child {
    margin-top: 0px;
}

dl dt>:last-child {
    margin-bottom: 0px;
}

dl dd {
    margin: 0 0 15px;
    padding: 0 15px;
}

dl dd>:first-child {
    margin-top: 0px;
}

dl dd>:last-child {
    margin-bottom: 0px;
}

/* CODE
=============================================================================*/

pre, code, tt {
    font-size: 12px;
    font-family: Consolas, "Liberation Mono", Courier, monospace;
}

code, tt {
    margin: 0 0px;
    padding: 0px 0px;
    white-space: nowrap;
    border: 1px solid #eaeaea;
    background-color: #f8f8f8;
    border-radius: 3px;
}

pre>code {
    margin: 0;
    padding: 0;
    white-space: pre;
    color: #338000;
    border: none;
    background: transparent;

}

pre {
    background-color: #f8f8f8;
    border: 1px solid #ccc;
    font-size: 13px;
    line-height: 19px;
    overflow: auto;
    padding: 6px 10px;
    border-radius: 3px;
}

pre code, pre tt {
    background-color: transparent;
    border: none;
}
/* QUOTES
=============================================================================*/

blockquote {
    border-left: 4px solid #DDD;
    padding: 0 15px;
    color: #777;
}

blockquote>:first-child {
    margin-top: 0px;
}

blockquote>:last-child {
    margin-bottom: 0px;
}

/* HORIZONTAL RULES
=============================================================================*/

hr {
    clear: both;
    margin: 15px 0;
    height: 0px;
    overflow: hidden;
    border: none;
    background: transparent;
    border-bottom: 4px solid #ddd;
    padding: 0;
}

/* TABLES
=============================================================================*/
table{
    margin: 0 auto;
}
table th {
    font-weight: bold;
}

table th, table td {
    border: 1px solid #ccc;
    padding: 6px 13px;
}

table tr {
    border-top: 1px solid #ccc;
    background-color: #fff;
}

table tr:nth-child(2n) {
    background-color: #f8f8f8;
}

/* IMAGES
=============================================================================*/

img {
    max-width: 100%
}
/* P
=============================================================================*/
p{
    font-size:1.2em;
}


/*目录形成的范围*/
#outline-list {
    height: 325px;
    position: fixed;
    overflow-y:scroll;
    overflow-x:hidden;
    bottom: 80px;
    right: 15px;
    width: 220px;
}

创建gulpfile.js文件

    const gulp = require('gulp');
    const markdown = require('gulp-markdown');
    const concat = require('gulp-concat');
    const rename = require('gulp-rename');
    const mdpdf = require('gulp-markdown-pdf');
    const header = require('gulp-header');
    const clean = require('gulp-clean');

• 创建任务列表

markdown-css- 生成css文件

gulp.task('markdown-css', () => {
    gulp.src('./css/md1.css')
        .pipe(rename('md.css'))
        .pipe(gulp.dest('./dist/html'));
});

markdown-html-clean - 清除html下的文件

gulp.task('markdown-html-clean', () => {
    gulp.src('./dist/html')
        .pipe(clean());
});

markdown-html - 打包生成html文件

因为采用的gulp4版本，与gulp3任务执行写法不同可查看

gulp.task('markdown-html', gulp.parallel('markdown-css', () => {
        gulp.src('../src/**/**.md')
            .pipe(concat('./index.md'))
            .pipe(rename('index.md'))
            .pipe(header('<!doctype html><head><meta charset="utf-8"/><title>API文档</title><link rel="stylesheet" href="md.css"></head>\n\r'))
            .pipe(markdown({
                headerIds: false
            }))
            .pipe(gulp.dest('dist/html'));
    })
);

markdown-pdf - 生成pdf文件

gulp.task('markdown-pdf', () => {
    gulp.src('../src/**/**.md')
        .pipe(concat('./index.md'))
        .pipe(rename('pdf.md'))
        .pipe(mdpdf())
        .pipe(gulp.dest('dist'));
});

• 文件目录

  
  image.png

• pdf效果图

  
  image.png

• html效果图
  样式1-效果图

  
  image.png

样式2-效果图

image.png