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" Author: w0rp <devw0rp@gmail.com>, David Alexander <opensource@thelonelyghost.com>
" Description: Primary code path for the plugin
" Manages execution of linters when requested by autocommands
let s:lint_timer = -1
let s:queued_buffer_number = -1
let s:should_lint_file_for_buffer = {}
" Return 1 if a file is too large for ALE to handle.
function! ale#FileTooLarge() abort
let l:max = ale#Var(bufnr(''), 'maximum_file_size')
return l:max > 0 ? (line2byte(line('$') + 1) > l:max) : 0
endfunction
" A function for checking various conditions whereby ALE just shouldn't
" attempt to do anything, say if particular buffer types are open in Vim.
function! ale#ShouldDoNothing() abort
" Do nothing for blacklisted files
" OR if ALE is running in the sandbox
return index(g:ale_filetype_blacklist, &filetype) >= 0
\ || (exists('*getcmdwintype') && !empty(getcmdwintype()))
\ || ale#util#InSandbox()
\ || !ale#Var(bufnr(''), 'enabled')
\ || ale#FileTooLarge()
endfunction
" (delay, [linting_flag])
function! ale#Queue(delay, ...) abort
if len(a:0) > 1
throw 'too many arguments!'
endif
" Default linting_flag to ''
let l:linting_flag = get(a:000, 0, '')
if l:linting_flag !=# '' && l:linting_flag !=# 'lint_file'
throw "linting_flag must be either '' or 'lint_file'"
endif
if ale#ShouldDoNothing()
return
endif
" Remember that we want to check files for this buffer.
" We will remember this until we finally run the linters, via any event.
if l:linting_flag ==# 'lint_file'
let s:should_lint_file_for_buffer[bufnr('%')] = 1
endif
if s:lint_timer != -1
call timer_stop(s:lint_timer)
let s:lint_timer = -1
endif
let l:buffer = bufnr('')
let l:linters = ale#linter#Get(getbufvar(l:buffer, '&filetype'))
" Don't set up buffer data and so on if there are no linters to run.
if empty(l:linters)
" If we have some previous buffer data, then stop any jobs currently
" running and clear everything.
if has_key(g:ale_buffer_info, l:buffer)
call ale#engine#RunLinters(l:buffer, [], 1)
endif
return
endif
if a:delay > 0
let s:queued_buffer_number = bufnr('%')
let s:lint_timer = timer_start(a:delay, function('ale#Lint'))
else
call ale#Lint()
endif
endfunction
function! ale#Lint(...) abort
" Get the buffer number linting was queued for.
" or else take the current one.
let l:buffer = len(a:0) > 1 && a:1 == s:lint_timer
\ ? s:queued_buffer_number
\ : bufnr('%')
if ale#ShouldDoNothing()
return
endif
" Use the filetype from the buffer
let l:linters = ale#linter#Get(getbufvar(l:buffer, '&filetype'))
let l:should_lint_file = 0
" Check if we previously requested checking the file.
if has_key(s:should_lint_file_for_buffer, l:buffer)
unlet s:should_lint_file_for_buffer[l:buffer]
" Lint files if they exist.
let l:should_lint_file = filereadable(expand('#' . l:buffer . ':p'))
endif
call ale#engine#RunLinters(l:buffer, l:linters, l:should_lint_file)
endfunction
" Reset flags indicating that files should be checked for all buffers.
function! ale#ResetLintFileMarkers() abort
let s:should_lint_file_for_buffer = {}
endfunction
let g:ale_has_override = get(g:, 'ale_has_override', {})
" Call has(), but check a global Dictionary so we can force flags on or off
" for testing purposes.
function! ale#Has(feature) abort
return get(g:ale_has_override, a:feature, has(a:feature))
endfunction
" Given a buffer number and a variable name, look for that variable in the
" buffer scope, then in global scope. If the name does not exist in the global
" scope, an exception will be thrown.
"
" Every variable name will be prefixed with 'ale_'.
function! ale#Var(buffer, variable_name) abort
let l:nr = str2nr(a:buffer)
let l:full_name = 'ale_' . a:variable_name
if bufexists(l:nr)
let l:vars = getbufvar(l:nr, '')
elseif has_key(g:, 'ale_fix_buffer_data')
let l:vars = get(g:ale_fix_buffer_data, l:nr, {'vars': {}}).vars
else
let l:vars = {}
endif
return get(l:vars, l:full_name, g:[l:full_name])
endfunction
" Initialize a variable with a default value, if it isn't already set.
"
" Every variable name will be prefixed with 'ale_'.
function! ale#Set(variable_name, default) abort
let l:full_name = 'ale_' . a:variable_name
let l:value = get(g:, l:full_name, a:default)
let g:[l:full_name] = l:value
return l:value
endfunction
" Escape a string suitably for each platform.
" shellescape does not work on Windows.
function! ale#Escape(str) abort
if fnamemodify(&shell, ':t') ==? 'cmd.exe'
" If the string contains spaces, it will be surrounded by quotes.
" Otherwise, special characters will be escaped with carets (^).
return substitute(
\ a:str =~# ' '
\ ? '"' . substitute(a:str, '"', '""', 'g') . '"'
\ : substitute(a:str, '\v([&|<>^])', '^\1', 'g'),
\ '%',
\ '%%',
\ 'g',
\)
endif
return shellescape (a:str)
endfunction
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