Settings env variable for compiler

[tonitch]

Is your feature request related to a problem? Please describe it. I compile my documents with TEXINPUTS=.:${PWD}/../Commons//:${TEXINPUTS} pdflatex main.tex and it works. I don't find how to set this environment variable when using vimtex I tried to export the variable before launching vim and this doesn't have effect.

Describe the solution you'd like I would like a variable (something like g:vimtex_compiler_latexmk['env'] that would be put as env variable before executing the compilation

Describe alternatives you've considered I don't really know why it doesn't work but maybe the TEXINPUTS should be passed trought ?