ale/ale_linters/terraform/terraform.vim
Keith Maxwell 88fa0b9294 Add a terraform linter
This linter uses the check functionality built into terraform. ALE
already has a fixer using `terraform fmt` but this doesn't provide error
messages. ALE already has a linter using `tflint` but this requires an
extra application to be installed.

For example this linter will give a warning that ! is an illegal
character in the line below:

    variable "example" !{}

This linter runs the buffer through the command below and parses the
output:

    terraform fmt -no-color -check=true -

This commit includes a basic implementation, documentation and tests.
The only option is to control which executable is run.

Tested with:

    $ terraform -version
    Terraform v0.11.13
2019-05-23 15:49:02 +01:00

50 lines
1.5 KiB
VimL
Executable File

" Author: Keith Maxwell <keith.maxwell@gmail.com>
" Description: terraform fmt to check for errors
call ale#Set('terraform_terraform_executable', 'terraform')
function! ale_linters#terraform#terraform#GetExecutable(buffer) abort
return ale#Var(a:buffer, 'terraform_terraform_executable')
endfunction
function! ale_linters#terraform#terraform#GetCommand(buffer) abort
return ale#Escape(ale_linters#terraform#terraform#GetExecutable(a:buffer))
\ . ' fmt -no-color --check=true -'
endfunction
function! ale_linters#terraform#terraform#Handle(buffer, lines) abort
let l:head = '^Error running fmt: In <standard input>: '
let l:output = []
let l:patterns = [
\ l:head.'At \(\d\+\):\(\d\+\): \(.*\)$',
\ l:head.'\(.*\)$'
\]
for l:match in ale#util#GetMatches(a:lines, l:patterns)
if len(l:match[2]) > 0
call add(l:output, {
\ 'lnum': str2nr(l:match[1]),
\ 'col': str2nr(l:match[2]),
\ 'text': l:match[3],
\ 'type': 'E',
\})
else
call add(l:output, {
\ 'lnum': line('$'),
\ 'text': l:match[1],
\ 'type': 'E',
\})
endif
endfor
return l:output
endfunction
call ale#linter#Define('terraform', {
\ 'name': 'terraform',
\ 'output_stream': 'stderr',
\ 'executable': function('ale_linters#terraform#terraform#GetExecutable'),
\ 'command': function('ale_linters#terraform#terraform#GetCommand'),
\ 'callback': 'ale_linters#terraform#terraform#Handle',
\})