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" Author: w0rp <devw0rp@gmail.com>
" Description: This file adds support for using the shellcheck linter
" Shellcheck supports shell directives to define the shell dialect for scripts
" that do not have a shebang for some reason.
" https://github.com/koalaman/shellcheck/wiki/Directive#shell
function! ale#handlers#shellcheck#GetShellcheckDialectDirective(buffer) abort
let l:linenr = 0
let l:pattern = '\s\{-}#\s\{-}shellcheck\s\{-}shell=\(.*\)'
let l:possible_shell = ['bash', 'dash', 'ash', 'tcsh', 'csh', 'zsh', 'ksh', 'sh']
while l:linenr < min([50, line('$')])
let l:linenr += 1
let l:match = matchlist(getline(l:linenr), l:pattern)
if len(l:match) > 1 && index(l:possible_shell, l:match[1]) >= 0
return l:match[1]
endif
endwhile
return ''
endfunction
function! ale#handlers#shellcheck#GetDialectArgument(buffer) abort
let l:shell_type = ale#handlers#shellcheck#GetShellcheckDialectDirective(a:buffer)
if empty(l:shell_type)
let l:shell_type = ale#handlers#sh#GetShellType(a:buffer)
endif
if !empty(l:shell_type)
" Use the dash dialect for /bin/ash, etc.
if l:shell_type is# 'ash'
return 'dash'
endif
return l:shell_type
endif
return ''
endfunction
function! ale#handlers#shellcheck#GetCwd(buffer) abort
return ale#Var(a:buffer, 'sh_shellcheck_change_directory') ? '%s:h' : ''
endfunction
function! ale#handlers#shellcheck#GetCommand(buffer, version) abort
let l:options = ale#Var(a:buffer, 'sh_shellcheck_options')
let l:exclude_option = ale#Var(a:buffer, 'sh_shellcheck_exclusions')
let l:dialect = ale#Var(a:buffer, 'sh_shellcheck_dialect')
let l:external_option = ale#semver#GTE(a:version, [0, 4, 0]) ? ' -x' : ''
if l:dialect is# 'auto'
let l:dialect = ale#handlers#shellcheck#GetDialectArgument(a:buffer)
endif
return '%e'
\ . (!empty(l:dialect) ? ' -s ' . l:dialect : '')
\ . (!empty(l:options) ? ' ' . l:options : '')
\ . (!empty(l:exclude_option) ? ' -e ' . l:exclude_option : '')
\ . l:external_option
\ . ' -f gcc -'
endfunction
function! ale#handlers#shellcheck#Handle(buffer, lines) abort
let l:pattern = '\v^([a-zA-Z]?:?[^:]+):(\d+):(\d+)?:? ([^:]+): (.+) \[([^\]]+)\]$'
let l:output = []
for l:match in ale#util#GetMatches(a:lines, l:pattern)
if l:match[4] is# 'error'
let l:type = 'E'
elseif l:match[4] is# 'note'
let l:type = 'I'
else
let l:type = 'W'
endif
let l:item = {
\ 'lnum': str2nr(l:match[2]),
\ 'type': l:type,
\ 'text': l:match[5],
\ 'code': l:match[6],
\}
if !empty(l:match[3])
let l:item.col = str2nr(l:match[3])
endif
" If the filename is something like <stdin>, <nofile> or -, then
" this is an error for the file we checked.
if l:match[1] isnot# '-' && l:match[1][0] isnot# '<'
let l:item['filename'] = l:match[1]
endif
call add(l:output, l:item)
endfor
return l:output
endfunction
function! ale#handlers#shellcheck#DefineLinter(filetype) abort
" This global variable can be set with a string of comma-separated error
" codes to exclude from shellcheck. For example:
" let g:ale_sh_shellcheck_exclusions = 'SC2002,SC2004'
call ale#Set('sh_shellcheck_exclusions', '')
call ale#Set('sh_shellcheck_executable', 'shellcheck')
call ale#Set('sh_shellcheck_dialect', 'auto')
call ale#Set('sh_shellcheck_options', '')
call ale#Set('sh_shellcheck_change_directory', 1)
call ale#linter#Define(a:filetype, {
\ 'name': 'shellcheck',
\ 'executable': {buffer -> ale#Var(buffer, 'sh_shellcheck_executable')},
\ 'cwd': function('ale#handlers#shellcheck#GetCwd'),
\ 'command': {buffer -> ale#semver#RunWithVersionCheck(
\ buffer,
\ ale#Var(buffer, 'sh_shellcheck_executable'),
\ '%e --version',
\ function('ale#handlers#shellcheck#GetCommand'),
\ )},
\ 'callback': 'ale#handlers#shellcheck#Handle',
\})
endfunction
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