fixed bug with setting root doc which would fail if the document class isn't on the top line

services/web/app/coffee/Features/Project/ProjectRootDocManager.coffee

@@ -5,6 +5,7 @@ _ = require("underscore")
 
 module.exports = ProjectRootDocManager =
 	setRootDocAutomatically: (project_id, callback = (error) ->) ->
+
 		ProjectEntityHandler.getAllDocs project_id, (error, docs) ->
 			return callback(error) if error?
 
@@ -12,13 +13,14 @@ module.exports = ProjectRootDocManager =
 			root_doc_id = null
 			jobs = _.map docs, (doc, path)->
 				return (cb)->
+					rootDocId = null
 					for line in doc.lines || []
 						match = line.match /(.*)\\documentclass/ # no lookbehind in js regexp :(
 						isRootDoc = Path.extname(path).match(/\.R?tex$/) and match and !match[1].match /%/
 						if isRootDoc
-							return cb(doc?._id)
-						else
-							return cb()
+							rootDocId = doc?._id
+					cb(rootDocId)
+
 			async.series jobs, (root_doc_id)->
 				if root_doc_id?
 					ProjectEntityHandler.setRootDoc project_id, root_doc_id, callback

services/web/test/UnitTests/coffee/Project/ProjectRootDocManagerTests.coffee

@@ -18,10 +18,10 @@ describe 'ProjectRootDocManager', ->
 				@docs =
 					"/chapter1.tex":
 						_id: "doc-id-1"
-						lines: ["\\begin{document}", "Hello world", "\\end{document}"]
+						lines: ["something else","\\begin{document}", "Hello world", "\\end{document}"]
 					"/main.tex":
 						_id: "doc-id-2"
-						lines: ["\\documentclass{article}", "\\input{chapter1}"]
+						lines: ["different line","\\documentclass{article}", "\\input{chapter1}"]
 					"/nested/chapter1a.tex":
 						_id: "doc-id-3"
 						lines: ["Hello world"]