atomify-css/css.js at master · atomify/atomify-css · GitHub

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'use strict'

varrework=require('rework')
,npm=require('rework-npm')
,bower=require('rework-bower')
,vars=require('rework-vars')
,assets=require('rework-assets')
,path=require('path')
,fs=require('fs')
,events=require('events')
,resolve=require('resolve')
,pkg=require('package-lookup')
,read=functionread(f){
returnfs.readFileSync(f,'utf8')
}
,ctor

ctor=module.exports=functionuseRework(opts,cb){
varsrc

opts=opts||{}

try{
src=bundle(opts)
}
catch(err){
returnvoidsetImmediate(functionasyncifyErrorCallback(){
cb(err)
})
}

setImmediate(functionasyncifySuccessCallback(){
cb(null,src)
})
}

ctor.emitter=newevents.EventEmitter()

functionresolveFilePath(filePath){
returnpath.resolve(process.cwd(),filePath)
}

functiongetPlugin(plugin,basedir){
varpluginName
,pluginArgs
,pluginPath

if(typeofplugin==='string')pluginName=plugin

if(Array.isArray(plugin)){
pluginName=plugin[0]
pluginArgs=plugin.slice(1)
}

pluginPath=resolve.sync(pluginName,{basedir: basedir})

if(pluginArgs){
returnrequire(pluginPath).apply(null,pluginArgs)
}
else{
returnrequire(pluginPath)
}
}

functionapplyReworkAssets(css,opts,dirName){
if(opts.assets){
css.use(assets({
src: dirName
,dest: opts.assets.dest||''
,prefix: opts.assets.prefix||''
,retainName: opts.assets.retainName||''
}))
}
}

functionapplyReworkPlugins(css,opts,dirName){
if(opts.plugins){
opts.plugins.forEach(functionuseOptionPlugins(plugin){
css.use(getPlugin(plugin,dirName))
})
}
}

functionapplyReworkVars(css,opts){
if(typeofopts.variables==='string'){
varvariablesFilePath=resolveFilePath(opts.variables)
opts.variables=readJSON(variablesFilePath)
}
// even if variables were not provided
// use rework-vars to process default values
css.use(vars({map: opts.variables}))
}

functionprefilter(src,filename){
varconfig=pkg.resolve(filename)
,css

ctor.emitter.emit('file',filename)

if(config&&config.atomify&&config.atomify.css&&config.atomify.css.plugins){
css=rework(src)
config.atomify.css.plugins.forEach(functionusePlugins(plugin){
css.use(getPlugin(plugin,path.dirname(filename)))
})
returncss.toString()
}

returnsrc
}

functionapplyRework(opts,resolvedEntry){
varcss=rework(read(resolvedEntry),{source: resolvedEntry})
,dirName=path.dirname(resolvedEntry)
,pkgmgr=opts.bower ? bower : npm

css.use(pkgmgr({
root: dirName
,prefilter: prefilter
}))

applyReworkVars(css,opts)
applyReworkAssets(css,opts,dirName)
applyReworkPlugins(css,opts,dirName)

returncss.toString({
sourcemap: opts.debug||opts.sourcemap
,compress: opts.compress
})
}

functionbundle(opts){
varentries=[]

opts.entries.forEach(functionresolveEntries(entry){
varresolvedEntry=resolveFilePath(entry)

entries.push(applyRework(opts,resolvedEntry))
})

returnentries.join(opts.compress ? '' : '\n')
}

functionreadJSON(filepath){
varsrc=read(filepath)

try{
returnJSON.parse(src)
}
catch(e){
thrownewError('Unable to parse "'+filepath+'" file ('+e.message+').',e)
}
}