Variables are Not Defined Correctly at Initialization when Using the "General" Viewer

[gkapfham]

I am running the most recent version of vimtex and I have discovered an issue when you do not specify a specific viewer such as Zathura. For instance, suppose that you have a minimal working example in the file minimal.tex that has the following contents:

\documentclass{minimal}
\begin{document}
Hello world first page!
\newpage
Hello world second page!
\newpage
\input{sections/first.tex}
\end{document}

In this case, the sections/first.tex file contains the following contents:

% vim: ft=tex
% !TEX root = minimal.tex
% mainfile: ../minimal.tex

Hello world third page!!

I am going to write a lot of content now. Does this work?

Additionally, I have configured the vimrc file to have these contents:

set nocompatible
filetype plugin indent on
syntax enable
set iskeyword+=:
set hidden

" change the mapleader from \ to , -- this makes it easier to perform compilation in LaTeX
let maplocalleader=","
let mapleader=","

call plug#begin('~/.vim/bundle')
Plug 'https://github.com/lervag/vimtex.git', {'for': 'tex'}
call plug#end()

" Starting to use vim-latex and it needs several configurations to work correctly
let g:vimtex_latexmk_options="-pdf -pdflatex='pdflatex -file-line-error -shell-escape -synctex=1'"
let g:vimtex_fold_enabled = 0
let g:vimtex_quickfix_mode = 2
let g:vimtex_quickfix_open_on_warning = 1
let g:vimtex_toc_resize = 0
let g:vimtex_toc_hide_help = 1
let g:vimtex_indent_enabled = 1
let g:vimtex_latexmk_enabled = 1
let g:vimtex_latexmk_callback = 1
let g:vimtex_complete_recursive_bib = 0
" let g:vimtex_view_method = 'zathura'

Please notice that the vimtex_view_method is commented out and thus vimtex should use the general approach as the default. Since I am using Ubuntu 14.04 LTS, this means that I will be running xdg-open when I run the \ll command for the minimal.tex file.

While vimtex's main features seem to work correctly, I have noticed that it produces the following error messages every time I attempt to use the general method for viewing:

Error detected while processing function vimtex#init..<SNR>34_init_modules..vimtex#view#init_buffer..4:
line    1:
E121: Undefined variable: g:vimtex_view_general_viewer
E116: Invalid arguments for function executable(g:vimtex_view_general_viewer)
E15: Invalid expression: !executable(g:vimtex_view_general_viewer)
Error detected while processing function vimtex#init..<SNR>34_init_modules..vimtex#view#init_buffer:
line   18:
E121: Undefined variable: g:vimtex_view_general_hook_view
E15: Invalid expression: '*' . g:vimtex_view_general_hook_view
line   20:
E121: Undefined variable: hookfunc
E116: Invalid arguments for function exists(hookfunc)
E15: Invalid expression: exists(hookfunc)
line   18:
E121: Undefined variable: g:vimtex_view_general_hook_callback
E15: Invalid expression: '*' . g:vimtex_view_general_hook_callback
line   20:
E121: Undefined variable: hookfunc
E116: Invalid arguments for function exists(hookfunc)
E15: Invalid expression: exists(hookfunc)
Error detected while processing FileType Auto commands for "*":
E117: Unknown function: UltiSnips#FileTypeChanged

Can any other users of vimtex confirm this issue? Additionally, @lervag, can you let me know if you can reproduce this and, if you can, then do you have an idea for a fix? If I have overlooked a new configuration variable that is now required, please let me know. Overall, any help that you can provide is greatly appreciated!

[lervag]

The bug was introduced due to a commit for #180, but it should be fixed now. I forgot to test all the viewers before committing. Sorry!