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var config = {
anchorClass : "glyphicon glyphicon-link"
}
var gulp = require('gulp')
var markdown = require('gulp-markdown')
var tap = require('gulp-tap')
var gutil = require('gulp-util')
var cheerio = require('gulp-cheerio')
var highlight = require('highlight.js')
var fs = require('fs')
var Handlebars = require('handlebars')
var notifier = require('node-notifier')
var path = require('path')
var handlebarshelperis = require('handlebars-helper-is')
handlebarshelperis(Handlebars)
var server = require('gulp-server-livereload')
// .replace(rStringToRegExp,'\\$1'))
// "[]" => "\[\]"
var rStringToRegExp = /([.$^{[(|)*+?\/])/g
var fStringToPrefixRegExp = function (str) {
return new RegExp(
'^' + (
str.replace(rStringToRegExp, '\\$1')
)
);
}
// 渲染数据源：为了让-include 能访问数据源，每次渲染都将数据源绑定在此对象上。
var oRenderData = {}
/*!
让模板支持引入其他模板作为模块
{{-include header}}
加载 _template/header.html 到当前代码行
*/
Handlebars.registerHelper('include', function (path) {
path = '_template/' + path + '.html'
if (fs.existsSync(path)) {
return Handlebars.compile(
new Handlebars.SafeString(
fs.readFileSync(path, 'utf-8')
).toString()
)(oRenderData)
} else {
var message = "Not find: {{include " + path + '}}'
gutil.log(gutil.colors.red(message))
notifier.notify({
'title': 'Gulp Not find',
'message': message
});
return new Handlebars.SafeString('<span style="color:red">' + message + '</span>')
}
})
/*!
比较2个参数
{{-is a b "==" "!=="}}
*/
Handlebars.registerHelper('-is', function (a, b, yes, no) {
return a == b?yes:no;
})
/*!
编译 markdown
@paths {string|array} - glob 或一个文件的绝对路径 gulp.src(paths)
@dist {string} - 相当于 gulp.dest(dist) 中的 dist
*/
var compileMD = function (paths) {
gulp.src(paths)
.pipe(markdown({
highlight: function (code) {
return highlight.highlightAuto(code).value
}
}))
.pipe(cheerio(function($, file){
var $titles = $('h1,h2,h3,h4,h5,h6')
$titles.removeAttr('id')
var $a = $('a')
$a.each(function () {
var $this = $(this)
var target = $this.attr('target');
if (!target){
$this.attr('target', '_blank')
}
})
}))
.pipe(tap(function (file) {
oRenderData = {
URL_PATH: file.path.replace(fStringToPrefixRegExp(__dirname),'')
}
var html = file.contents.toString()
// 将 <a href="demo.md"> 替换为 <a href="demo.html">
html = html.replace(/(href=['"][^"']+\.)md(['"])/g,'$1html$2')
// 将 <!-- #hash_demo --> 转换为锚记 <a href="#hash_demo" name="hash_demo"></a>
// oHash 用于防止 hash 重复
html = html.replace(/<!---([^-]+)-->/g,'$1')
// 将 <!---<div class="contents">--> 替换为 <div class="contents"> (因为官方文档中存在一些带 class 的 div，此处需要兼容官方文档样式)
var oHash = {}
html = html.replace(/<!--\s*#([^\s*]+)\s*-->/g, function () {
var hash = arguments[1];
if (oHash[hash]) {
gutil.log(gutil.colors.red(hash + 'is repeated'))
notifier.notify({
'title': 'hash repeated',
'message': Handlebars.escapeExpression(arguments[0])
})
} else {
oHash[hash] = true;
}
return '<a href="#' + hash + '" name="' + hash + '" class="' + config.anchorClass +' gulp-page-anchor" aria-hidden="true" ></a>'
})
/*!
获取 markdown 中的 JSON信息，做为 _template/*.html 模板的渲染数据
<!--_PAGEDATA
{
"title": "页面标题",
"github":"nimojs/gulp-page",
"githubissuesid": 1,
"createData": "2015-04-10",
"keywords": "关键词，以 , 为分隔符",
"description": "页面描述",
"_template": "default"
}
_PAGEDATA-->
*/
html = html.replace(/<\!--\_PAGEDATA([\s\S]*)?\_PAGEDATA-->/, function () {
try {
var pagedata = JSON.parse(arguments[1])
for (var key in pagedata) {
oRenderData[key] = pagedata[key]
}
} catch (err) {
gutil.log(gutil.colors.red(message))
notifier.notify({
'title': ' Not find',
'message': message
});
}
// 取到 JSON 后删除 <!--_PAGEDATA ... _PAGEDATA-->
return '';
})
// 将渲染数据的 content 属性定义为 *.md 编译后的 html
oRenderData.content = html
oRenderData._template = oRenderData._template || 'default'
var templatePath = '_template/' + oRenderData._template + '.html'
var filename = path.basename(file.path)
if (fs.existsSync(templatePath)) {
var template = fs.readFileSync(templatePath, 'utf-8')
template = template.replace(/\{\{\s*content\s*\}\}/g,'{{{content}}}')
.replace(/\{\{\s*include([^}]+)\}\}/g,'{{{$1}}}')
var output = Handlebars.compile(template)(oRenderData)
file.contents = new Buffer(output)
gutil.log('Markdown ' + gutil.colors.green(filename))
} else {
var message = "Not find:" + templatePath + '(' + filename + ')'
gutil.log(gutil.colors.red(message))
notifier.notify({
'title': 'Gulp Not find',
'message': message
});
file.contents = new Buffer(message)
}
}))
.pipe(gulp.dest(function(file) {
return file.base.replace(fStringToPrefixRegExp(__dirname + '/posts'), __dirname)
}))
}
gulp.task('watch-markdown', function () {
gulp.watch('**/*.md', function (event) {
compileMD(event.path)
})
})
gulp.task('watch-handlebars', function () {
gulp.watch('_template/*.html', function (event) {
compileMD(['*.md','!(node_modules/**/*)'])
})
})
gulp.task('posts', function (){
compileMD('posts/**/*.md')
})
gulp.task('reload', function () {
gulp.src('./')
.pipe(server({
livereload: true,
directoryListing: true,
defaultFile: 'index.html',
open: true
}))
})
gulp.task('default',['watch-markdown', 'watch-handlebars', 'reload'])
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