Document resin/data-prefix

lib/resin/data/data-prefix.coffee

@@ -1,11 +1,30 @@
 mkdirp = require('mkdirp')
 fsUtils = require('./fs-utils/fs-utils')
 
+# @nodoc
 prefix = null
 
+# Get current prefix
+#
+# @return {String} prefix
+#
+# @example Get prefix
+#		prefix = resin.data.prefix.get()
+#
 exports.get = ->
 	return prefix
 
+# Set prefix
+#
+# @param {String} newPrefix new prefix
+# @param {Function} callback callback (error)
+#
+# @throw {Error} Will throw if prefix is not a valid path
+#
+# @example Set prefix
+#		resin.data.prefix.set '/opt/resin', (error) ->
+#			throw error if error?
+#
 exports.set = (newPrefix, callback) ->
 	if not fsUtils.isValidPath(newPrefix)
 		return callback?(new Error('Invalid path'))
@@ -15,5 +34,9 @@ exports.set = (newPrefix, callback) ->
 		prefix = newPrefix
 		return callback?()
 
+# Clear prefix
+#
+# @example Clear prefix
+#		resin.data.prefix.clear()
 exports.clear = ->
 	prefix = null