PDF file cannot be updated when g:vimtex_view_use_temp_files is set to non-zero

[xarthurx]

Issue:

PDF file cannot be updated when g:vimtex_view_use_temp_files is set to non-zero

Reproduction:

1. Using the minimal example provided.
2. Activate VimTex, generate PDF. (a name_vimtex.pdf will be copied out to the project folder)
3. Change contents of the tex file, and pdf will be compiled.

expected behaviour:
The name_vimtex.pdf in the main folder will be updated.

observed behaviour:
Based on the timestamp of the file, the name_vimtex.pdf file is not copied out if there's one already in the folder.

using SumatraPDF as pdf viewer.
:VimtexInfo :

System info
  OS: Microsoft Windows 10 Pro (10.0.17763 N/A Build 17763)
  Vim version: NVIM v0.3.4
  Has clientserver: true
  Servername: \\.\pipe\nvim-14268-0

vimtex project: min
  base: min.tex
  root: C:\Users\xliot\Desktop\tmp
  tex: C:\Users\xliot\Desktop\tmp\min.tex
  out: C:\Users\xliot\Desktop\tmp/build/min.pdf
  log: C:\Users\xliot\Desktop\tmp/build/min.log
  aux: C:\Users\xliot\Desktop\tmp/build/min.aux
  fls: C:\Users\xliot\Desktop\tmp/build/min.fls
  compiler: latexmk
    backend: nvim
    output: C:\Users\xliot\AppData\Local\Temp\nvimWxH0Zc\0
    configuration: 
      continuous: 1
      callback: 1
      build_dir: build
      latexmk options:
        -pdf
        -pdflatex="xelatex --shell-escape %O %S"
        -verbose
        -file-line-error
        -synctex=1
        -interaction=nonstopmode
      latexmk engine: -pdf
    pid: 18400
    cmd: set max_print_line=2000 & latexmk -pdf -pdflatex="xelatex --shell-escape %O %S" -verbose -file-line-error -synctex=1 -interaction=nonstopmode -pdf -outdir=build -pvc -view=none -e "$success_cmd = 'echo vimtex_compiler_callback_success'" -e "$failure_cmd = 'echo vimtex_compiler_callback_failure'" "min.tex"
  viewer: General
    process: 
      pid: -
      cmd: start /b cmd /s /c "SumatraPDF.exe -reuse-instance -forward-search "C:\Users\xliot\Desktop\tmp\min.tex" 1 "C:\Users\xliot\Desktop\tmp\min_vimtex.pdf" -inverse-search "nvim --servername \\.\pipe\nvim-14268-0 --remote-send \"^<C-\^>^<C-n^>:drop \%f^<CR^>:\%l^<CR^>:normal\! zzzv^<CR^>:execute 'drop ' . fnameescape('\%f')^<CR^>:\%l^<CR^>:normal\! zzzv^<CR^>:call remote_foreground('\\.\pipe\nvim-14268-0')^<CR^>^<CR^>\"" >nul"
  qf: LaTeX logfile
    config: 
      fix_paths: 1
      packages: 
        default: 1
      default: 1
  document class: minimal

[lervag]

No minimal example is provided...

One question, though: Does SumatraPDF block the PDF somehow? That is, similar to what Acrobat does?

[xarthurx]

I use the one given in the template, from your repo.

\documentclass{minimal}
\begin{document}
Hello world!
\end{document}

For the block issue, I don't think so.
I tried manually copy a file with the same name and overwrite it, no problem.

SumatraPDF seems to keep its one cache, and does not hold the real pdf. (Though I need to manually refresh the software by pressing r to update -- only for the manually copy process)

[lervag]

But you are obviously using something different than the minivimrc at the same location:

set nocompatible
let &runtimepath  = '~/.vim/bundle/vimtex,' . &runtimepath
let &runtimepath .= ',~/.vim/bundle/vimtex/after'
filetype plugin indent on
syntax enable

nnoremap q :qall!<cr>

let g:vimtex_view_automatic = 0

silent edit main.tex

And so, again, the minimal example is not provided. The minimal vimrc file is much more important than the minimal LaTeX file.

[xarthurx]

Same issue. Note that if I don't set build_dir, all files will be in the same folder, but the name_vimtex.pdf is still not updated.

vimrc (I need to change some settings for Windows accordingly)

set nocompatible
syntax enable
filetype plugin indent on

nnoremap q :qall!<cr>

" python engine support
let g:python_host_prog = 'C:\Users\xliot\Miniconda3\python.exe'
let g:python3_host_prog = 'C:\Users\xliot\Miniconda3\python.exe'

if has('nvim')
   let g:vimtex_compiler_progname = 'C:\Users\xliot\Miniconda3\Scripts\nvr.exe'
endif

" pdf viewer
if has("win32") || has("64")
  let g:vimtex_view_general_viewer='SumatraPDF.exe'
else
  let g:vimtex_view_general_viewer='mupdf.exe'
endif

" copy pdf out of build folder
let g:vimtex_view_use_temp_files = 1
let g:vimtex_view_automatic = 0

[lervag]

I don't think the g:python[3]_host_prog settings are relevant at all. In any case, I'll look into this when I get the time.

[lervag]

Ok, how about now? Does it work with the latest update?

[xarthurx]

Works like a charm!
Thx!

[lervag]

No problem, happy to hear it works :)