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" Author: Jesse Harris - https://github.com/zigford
" Description: This file adds support for powershell scripts synatax errors
call ale#Set('powershell_powershell_executable', 'pwsh')
function! ale_linters#powershell#powershell#GetExecutable(buffer) abort
return ale#Var(a:buffer, 'powershell_powershell_executable')
endfunction
" Some powershell magic to show syntax errors without executing the script
" thanks to keith hill:
" https://rkeithhill.wordpress.com/2007/10/30/powershell-quicktip-preparsing-scripts-to-check-for-syntax-errors/
function! ale_linters#powershell#powershell#GetCommand(buffer) abort
let l:script = ['Param($Script);
\ $ErrorView = "Normal";
\ trap {$_;continue} & {
\ $Contents = Get-Content -Path $Script;
\ $Contents = [string]::Join([Environment]::NewLine, $Contents);
\ [void]$ExecutionContext.InvokeCommand.NewScriptBlock($Contents);
\ };']
return ale#powershell#RunPowerShell(
\ a:buffer, 'powershell_powershell', l:script)
endfunction
" Parse powershell error output using regex into a list of dicts
function! ale_linters#powershell#powershell#Handle(buffer, lines) abort
let l:output = []
" Our 3 patterns we need to scrape the data for the dicts
let l:patterns = [
\ '\v^At line:(\d+) char:(\d+)',
\ '\v^(At|\+| )@!.*',
\ '\vFullyQualifiedErrorId : (\w+)',
\]
let l:matchcount = 0
for l:match in ale#util#GetMatches(a:lines, l:patterns)
" We want to work with 3 matches per syntax error
let l:matchcount = l:matchcount + 1
if l:matchcount == 1 || str2nr(l:match[1])
" First match consists of 2 capture groups, and
" can capture the line and col
if exists('l:item')
" We may be here because the last syntax
" didn't emit a code, and so only had 2
" matches
call add(l:output, l:item)
let l:matchcount = 1
endif
" If the match is 0, it was a failed match
" probably due to an unexpected token which
" contained a newline. Reset matchcount. to
" continue to the next match
if !empty(l:match[1])
let l:item = {
\ 'lnum': str2nr(l:match[1]),
\ 'col': str2nr(l:match[2]),
\ 'type': 'E',
\}
else
let l:matchcount = 0
endif
elseif l:matchcount == 2
" Second match[0] grabs the full line in order
" to handles the text
let l:item['text'] = l:match[0]
else
" Final match handles the code, however
" powershell only emits 1 code for all errors
" so, we get the final code on the last error
" and loop over the previously added items to
" append the code we now know
call add(l:output, l:item)
unlet l:item
if len(l:match[1]) > 0
for l:i in l:output
let l:i['code'] = l:match[1]
endfor
endif
" Reset the matchcount so we can begin gathering
" matches for the next syntax error
let l:matchcount = 0
endif
endfor
return l:output
endfunction
call ale#linter#Define('powershell', {
\ 'name': 'powershell',
\ 'executable': function('ale_linters#powershell#powershell#GetExecutable'),
\ 'command': function('ale_linters#powershell#powershell#GetCommand'),
\ 'output_stream': 'stdout',
\ 'callback': 'ale_linters#powershell#powershell#Handle',
\})
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