github-markdown-preview/cli.js at master · timhudson/github-markdown-preview · GitHub

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#!/usr/bin/env node

varfs=require('fs')
varpath=require('path')
varopn=require('opn')
varchokidar=require('chokidar')
varconvert=require('./')
varserver=require('./server')
varargv=require('minimist')(process.argv.slice(2),{
alias: {
's': 'server',
'p': 'port',
'w': 'watch',
'o': 'output',
'h': 'help'
},
boolean: ['server','watch']
})

if(!argv._.length||argv.help){
varusage=''+
'Usage: github-markdown-preview <markdown-file> [options]\n\n'+
'outputs html of markdown with github styles to stdout\n\n'+
'Options:\n\n'+
' -h, --help output usage information\n'+
' -s, --server watch file and server changes. This overrides -w and -o.\n'+
' -w, --watch watch markdown file and convert on changes\n'+
' -p, --port optional TCP port to start the server at, defaults to 9999\n'+
' -o, --output optional file path for output. stdout is used by default.\n'+
' required when using --watch.'
returnconsole.log(usage)
}

if(argv.watch&&!argv.output){
returnconsole.log('You must specify --output path when using --watch')
}

varmarkdownPath=path.resolve(argv._[0])

if(argv.server){
chokidar
.watch(markdownPath,{persistent: true})
.on('change',updateServerHTML)

varport=argv.port||9999

returnupdateServerHTML(function(){
server.listen(port)
console.log('Preview now being served at http://localhost:'+port)
opn('http://localhost:'+port)
})
}

if(argv.watch){
chokidar
.watch(markdownPath,{persistent: true})
.on('change',logHTML)
}

logHTML()

functiongenerateHTML(callback){
varmd=fs.readFileSync(markdownPath)
convert(md,callback)
}

functionlogHTML(){
generateHTML(function(err,html){
if(err)throwerr
if(argv.o)returnfs.writeFileSync(path.resolve(argv.o),html)
console.log(html)
})
}

functionupdateServerHTML(cb){
generateHTML(function(err,html){
server.update(html)
if(typeofcb==='function')cb()
})
}