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var through = require('through2')
, fs = require('fs')
, p = require('path')
, rm = require('rimraf')
, mkdirp = require('mkdirp')
, gutil = require('gulp-util')
, PluginError = gutil.PluginError
, File = gutil.File
, PLUGIN_NAME = 'gulp-sym'
// Plugin level function(dealing with files)
function gulpSymlink(dest, options) {
options = typeof options == 'object' ? options : {}
options.force = options.force === undefined ? false : options.force
if (!dest) {
throw new PluginError({plugin: PLUGIN_NAME, message: "Missing destination link"})
}
if(dest instanceof Array) {
//copy array because we'll shift values
var destinations = dest.slice()
}
var stream = through.obj(function(source, enc, callback) {
var self = this, symlink
//resolving absolute path from source
source.path = p.resolve(source.cwd, source.path)
// source.relative = p.relative(source.cwd, source.path)
//Array of destinations is passed
symlink = destinations !== undefined ? destinations.shift() : dest
//if dest is a function simply call it
symlink = typeof dest == 'function' ? dest(source) : symlink
//is the previous result a File instance ?
symlink = symlink instanceof File ? symlink : new File({path: symlink})
//resolving absolute path from dest
symlink.path = p.resolve(symlink.cwd, symlink.path)
//relative path between source and link
var relative_symlink_source = p.relative(p.dirname(symlink.path), source.path)
//check if the destination path exists
var exists = fs.existsSync(symlink.path)
//No force option, we can't override!
if(exists && !options.force) {
this.emit('error', new PluginError({plugin: PLUGIN_NAME, message: 'Destination file exists ('+dest+') - use force option to replace'}))
this.push(source)
return callback()
} else {
//remove destination if force option
if(exists && options.force === true)
rm.sync(symlink.path) //I'm aware that this is bad \o/
//create destination directories
if(!fs.existsSync(p.dirname(symlink.path)))
mkdirp.sync(p.dirname(symlink.path))
//this is a windows check as specified in http://nodejs.org/api/fs.html#fs_fs_symlink_srcpath_dstpath_type_callback
source.stat = fs.statSync(source.path)
fs.symlink(options.relative ? relative_symlink_source : source.path, symlink.path, source.stat.isDirectory() ? 'dir' : 'file', function(err) {
if(err)
self.emit('error', new PluginError({plugin: PLUGIN_NAME, message: err}))
else
gutil.log(PLUGIN_NAME + ':', gutil.colors.blue(options.relative ? relative_symlink_source : source.path), '→', gutil.colors.yellow(symlink.path))
self.push(source)
return callback()
})
}
})
return stream
}
module.exports = gulpSymlink
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