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" Author: Masahiro H https://github.com/mshr-h
" Description: verilator for verilog files
" Set this option to change Verilator lint options
if !exists('g:ale_verilog_verilator_options')
let g:ale_verilog_verilator_options = ''
endif
function! ale_linters#verilog#verilator#GetCommand(buffer) abort
let l:filename = ale#util#Tempname() . '_verilator_linted.v'
" Create a special filename, so we can detect it in the handler.
call ale#command#ManageFile(a:buffer, l:filename)
let l:lines = getbufline(a:buffer, 1, '$')
call ale#util#Writefile(a:buffer, l:lines, l:filename)
return 'verilator --lint-only -Wall -Wno-DECLFILENAME '
\ . ale#Var(a:buffer, 'verilog_verilator_options') .' '
\ . ale#Escape(l:filename)
endfunction
function! ale_linters#verilog#verilator#Handle(buffer, lines) abort
" Look for lines like the following.
"
" %Error: addr_gen.v:3: syntax error, unexpected IDENTIFIER
" %Warning-WIDTH: addr_gen.v:26: Operator ASSIGNDLY expects 12 bits on the Assign RHS, but Assign RHS's CONST '20'h0' generates 20 bits.
" %Warning-UNUSED: test.v:3: Signal is not used: a
" %Warning-UNDRIVEN: test.v:3: Signal is not driven: clk
" %Warning-UNUSED: test.v:4: Signal is not used: dout
" %Warning-BLKSEQ: test.v:10: Blocking assignments (=) in sequential (flop or latch) block; suggest delayed assignments (<=).
" Since version 4.032 (04/2020) verilator linter messages also contain the column number,
" and look like:
" %Error: /tmp/test.sv:3:1: syntax error, unexpected endmodule, expecting ';'
"
" to stay compatible with old versions of the tool, the column number is
" optional in the researched pattern
let l:pattern = '^%\(Warning\|Error\)[^:]*:\([^:]\+\):\(\d\+\):\(\d\+\)\?:\? \(.\+\)$'
let l:output = []
for l:match in ale#util#GetMatches(a:lines, l:pattern)
let l:item = {
\ 'lnum': str2nr(l:match[3]),
\ 'text': l:match[5],
\ 'type': l:match[1] is# 'Error' ? 'E' : 'W',
\}
if !empty(l:match[4])
let l:item.col = str2nr(l:match[4])
endif
let l:file = l:match[2]
if l:file =~# '_verilator_linted.v'
call add(l:output, l:item)
endif
endfor
return l:output
endfunction
call ale#linter#Define('verilog', {
\ 'name': 'verilator',
\ 'output_stream': 'stderr',
\ 'executable': 'verilator',
\ 'command': function('ale_linters#verilog#verilator#GetCommand'),
\ 'callback': 'ale_linters#verilog#verilator#Handle',
\ 'read_buffer': 0,
\})
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