vim-polyglot/indent/terraform.vim

if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'terraform') == -1
  
" Only load this file if no other indent file was loaded
if exists("b:did_indent")
  finish
endif
let b:did_indent = 1

setlocal nolisp
setlocal autoindent sw=2 ts=2
setlocal indentexpr=TerraformIndent(v:lnum)
setlocal indentkeys+=<:>,0=},0=)

if exists("*TerraformIndent")
  finish
endif

function! TerraformIndent(lnum)
  " Beginning of the file should have no indent
  if a:lnum == 0
    return 0
  endif

  " Previous non-blank line should continue the indent level
  let prevlnum = prevnonblank(a:lnum-1)

  " Previous line without comments should continue the indent level
  let prevline = substitute(getline(prevlnum), '//.*$', '', '')
  let previndent = indent(prevlnum)
  let thisindent = previndent

  " Config block starting with [ { ( should increase the indent level
  if prevline =~ '[\[{\(]\s*$'
    let thisindent += &sw
  endif

  " Current line without comments should continue the indent level
  let thisline = substitute(getline(a:lnum), '//.*$', '', '')

  " Config block ending with ) } ] should get the indentation
  " level from the initial config block
  if thisline =~ '^\s*[\)}\]]'
    let thisindent -= &sw
  endif

  return thisindent
endfunction

endif