# HG changeset patch
# User Ludovic Chabant <ludovic@chabant.com>
# Date 1552285894 25200
# Node ID a77c3eb4ce34242f498cf38ed6b12bc8690eebfa
# Parent  def58b9d22c6fd1840b6c65edb890ecf1838d5a6
Handle custom project root finder functions returning no value.

This is easier on implementers than forcing them to raise an error that
starts with "gutentags:".

diff -r def58b9d22c6 -r a77c3eb4ce34 autoload/gutentags.vim
--- a/autoload/gutentags.vim	Tue Dec 18 23:32:20 2018 +0300
+++ b/autoload/gutentags.vim	Sun Mar 10 23:31:34 2019 -0700
@@ -272,6 +272,10 @@
         if !exists('b:gutentags_root')
             let b:gutentags_root = gutentags#get_project_root(l:buf_dir)
         endif
+        if !len(b:gutentags_root)
+            call gutentags#trace("no valid project root.. no gutentags support.")
+            return
+        endif
         if filereadable(b:gutentags_root . '/.notags')
             call gutentags#trace("'.notags' file found... no gutentags support.")
             return