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" Author: Alistair Bill <@alibabzo>
" Author: Maximilian Bosch <maximilian@mbosch.me>
" Description: nix-instantiate linter for nix files
function! ale_linters#nix#nix#Command(buffer, output, meta) abort
let l:version = a:output[0][22:]
if l:version =~# '^\(2.[4-9]\|3\).*'
return 'nix-instantiate --log-format internal-json --parse -'
else
return 'nix-instantiate --parse -'
endif
endfunction
function! ale_linters#nix#nix#Handle(buffer, lines) abort
let l:output = []
if empty(a:lines)
return l:output
endif
if a:lines[0] =~# '^@nix .*'
for l:line in a:lines
if l:line =~# '^@nix .*'
let l:result = json_decode(strpart(l:line, 4))
if has_key(l:result, 'column')
call add(l:output, {
\ 'type': 'E',
\ 'lnum': l:result.line,
\ 'col': l:result.column,
\ 'text': l:result.raw_msg
\})
endif
endif
endfor
else
let l:pattern = '^\(.\+\): \(.\+\) at .*:\(\d\+\):\(\d\+\)$'
for l:match in ale#util#GetMatches(a:lines, l:pattern)
call add(l:output, {
\ 'lnum': l:match[3] + 0,
\ 'col': l:match[4] + 0,
\ 'text': l:match[1] . ': ' . substitute(l:match[2], ',$', '', ''),
\ 'type': l:match[1] =~# '^error' ? 'E' : 'W',
\})
endfor
endif
return l:output
endfunction
call ale#linter#Define('nix', {
\ 'name': 'nix',
\ 'output_stream': 'stderr',
\ 'executable': 'nix-instantiate',
\ 'command': {buffer -> ale#command#Run(
\ buffer,
\ 'nix-instantiate --version',
\ function('ale_linters#nix#nix#Command')
\ )},
\ 'callback': 'ale_linters#nix#nix#Handle',
\})
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