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" Author: Daniel Schemala <istjanichtzufassen@gmail.com>
" Description: rustc for rust files
if !exists('g:ale_rust_ignore_error_codes')
let g:ale_rust_ignore_error_codes = []
endif
function! ale_linters#rust#rustc#HandleRustcErrors(buffer_number, errorlines) abort
" FIXME: Fix this linter
return []
let l:file_name = fnamemodify(bufname(a:buffer_number), ':t')
let l:output = []
for l:errorline in a:errorlines
" ignore everything that is not Json
if l:errorline !~# '^{'
continue
endif
let l:error = json_decode(l:errorline)
if !empty(l:error.code) && index(g:ale_rust_ignore_error_codes, l:error.code.code) > -1
continue
endif
for l:span in l:error.spans
if l:span.is_primary &&
\ (l:span.file_name ==# l:file_name || l:span.file_name ==# '<anon>')
call add(l:output, {
\ 'bufnr': a:buffer_number,
\ 'lnum': l:span.line_start,
\ 'vcol': 0,
\ 'col': l:span.byte_start,
\ 'nr': -1,
\ 'text': l:error.message,
\ 'type': toupper(l:error.level[0]),
\})
else
" when the error is caused in the expansion of a macro, we have
" to bury deeper
let l:root_cause = s:FindErrorInExpansion(l:span, l:file_name)
if !empty(l:root_cause)
call add(l:output, {
\ 'bufnr': a:buffer_number,
\ 'lnum': l:root_cause[0],
\ 'vcol': 0,
\ 'col': l:root_cause[1],
\ 'nr': -1,
\ 'text': l:error.message,
\ 'type': toupper(l:error.level[0]),
\})
endif
endif
endfor
endfor
return l:output
endfunction
" returns: a list [lnum, col] with the location of the error or []
function! s:FindErrorInExpansion(span, file_name) abort
if a:span.file_name ==# a:file_name
return [a:span.line_start, a:span.byte_start]
endif
if !empty(a:span.expansion)
return s:FindErrorInExpansion(a:span.expansion.span, a:file_name)
endif
return []
endfunction
function! ale_linters#rust#rustc#RustcCommand(buffer_number) abort
" Try to guess the library search path. If the project is managed by cargo,
" it's usually <project root>/target/debug/deps/ or
" <project root>/target/release/deps/
let l:cargo_file = ale#util#FindNearestFile(a:buffer_number, 'Cargo.toml')
if l:cargo_file !=# ''
let l:project_root = fnamemodify(l:cargo_file, ':h')
let l:dependencies = '-L ' . l:project_root . '/target/debug/deps -L ' .
\ l:project_root . '/target/release/deps'
else
let l:dependencies = ''
endif
return 'rustc --error-format=json -Z no-trans ' . l:dependencies . ' -'
endfunction
call ale#linter#Define('rust', {
\ 'name': 'rustc',
\ 'executable': 'rustc',
\ 'command_callback': 'ale_linters#rust#rustc#RustcCommand',
\ 'callback': 'ale_linters#rust#rustc#HandleRustcErrors',
\ 'output_stream': 'stderr',
\})
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