/usr/share/vim/addons/indent/nginx.vim is in nginx-common 1.10.3-0ubuntu0.16.04.3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 | if exists("b:did_indent")
finish
endif
let b:did_indent = 1
setlocal indentexpr=
" cindent actually works for nginx' simple file structure
setlocal cindent
" Just make sure that the comments are not reset as defs would be.
setlocal cinkeys-=0#
|