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|
" Author: w0rp <devw0rp@gmail.com>
" Description: Backend execution and job management
" Executes linters in the background, using NeoVim or Vim 8 jobs
" Remapping of linter problems.
let g:ale_type_map = get(g:, 'ale_type_map', {})
let g:ale_filename_mappings = get(g:, 'ale_filename_mappings', {})
if !has_key(s:, 'executable_cache_map')
let s:executable_cache_map = {}
endif
function! ale#engine#CleanupEveryBuffer() abort
for l:key in keys(g:ale_buffer_info)
" The key could be a filename or a buffer number, so try and
" convert it to a number. We need a number for the other
" functions.
let l:buffer = str2nr(l:key)
if l:buffer > 0
" Stop all jobs and clear the results for everything, and delete
" all of the data we stored for the buffer.
call ale#engine#Cleanup(l:buffer)
endif
endfor
endfunction
function! ale#engine#MarkLinterActive(info, linter) abort
let l:found = 0
for l:other_linter in a:info.active_linter_list
if l:other_linter.name is# a:linter.name
let l:found = 1
break
endif
endfor
if !l:found
call add(a:info.active_linter_list, a:linter)
endif
endfunction
function! ale#engine#MarkLinterInactive(info, linter_name) abort
call filter(a:info.active_linter_list, 'v:val.name isnot# a:linter_name')
endfunction
function! ale#engine#ResetExecutableCache() abort
let s:executable_cache_map = {}
endfunction
" Check if files are executable, and if they are, remember that they are
" for subsequent calls. We'll keep checking until programs can be executed.
function! ale#engine#IsExecutable(buffer, executable) abort
if empty(a:executable)
" Don't log the executable check if the executable string is empty.
return 0
endif
" Check for a cached executable() check.
let l:result = get(s:executable_cache_map, a:executable, v:null)
if l:result isnot v:null
return l:result
endif
" Check if the file is executable, and convert -1 to 1.
let l:result = executable(a:executable) isnot 0
" Cache the executable check if we found it, or if the option to cache
" failing checks is on.
if l:result || get(g:, 'ale_cache_executable_check_failures', 0)
let s:executable_cache_map[a:executable] = l:result
endif
if g:ale_history_enabled
call ale#history#Add(a:buffer, l:result, 'executable', a:executable)
endif
return l:result
endfunction
function! ale#engine#InitBufferInfo(buffer) abort
if !has_key(g:ale_buffer_info, a:buffer)
" active_linter_list will hold the list of active linter names
" loclist holds the loclist items after all jobs have completed.
let g:ale_buffer_info[a:buffer] = {
\ 'active_linter_list': [],
\ 'active_other_sources_list': [],
\ 'loclist': [],
\}
return 1
endif
return 0
endfunction
" This function is documented and part of the public API.
"
" Return 1 if ALE is busy checking a given buffer
function! ale#engine#IsCheckingBuffer(buffer) abort
let l:info = get(g:ale_buffer_info, a:buffer, {})
return !empty(get(l:info, 'active_linter_list', []))
\ || !empty(get(l:info, 'active_other_sources_list', []))
endfunction
function! ale#engine#HandleLoclist(linter_name, buffer, loclist, from_other_source) abort
let l:info = get(g:ale_buffer_info, a:buffer, {})
if empty(l:info)
return
endif
if !a:from_other_source
" Remove this linter from the list of active linters.
" This may have already been done when the job exits.
call filter(l:info.active_linter_list, 'v:val.name isnot# a:linter_name')
endif
" Make some adjustments to the loclists to fix common problems, and also
" to set default values for loclist items.
let l:linter_loclist = ale#engine#FixLocList(
\ a:buffer,
\ a:linter_name,
\ a:from_other_source,
\ a:loclist,
\)
" Remove previous items for this linter.
call filter(l:info.loclist, 'v:val.linter_name isnot# a:linter_name')
" We don't need to add items or sort the list when this list is empty.
if !empty(l:linter_loclist)
" Add the new items.
call extend(l:info.loclist, l:linter_loclist)
" Sort the loclist again.
" We need a sorted list so we can run a binary search against it
" for efficient lookup of the messages in the cursor handler.
call sort(l:info.loclist, 'ale#util#LocItemCompare')
endif
if ale#ShouldDoNothing(a:buffer)
return
endif
call ale#engine#SetResults(a:buffer, l:info.loclist)
endfunction
function! s:HandleExit(job_info, buffer, output, data) abort
let l:buffer_info = get(g:ale_buffer_info, a:buffer)
if empty(l:buffer_info)
return
endif
let l:linter = a:job_info.linter
let l:executable = a:job_info.executable
" Remove this job from the list.
call ale#engine#MarkLinterInactive(l:buffer_info, l:linter.name)
" Stop here if we land in the handle for a job completing if we're in
" a sandbox.
if ale#util#InSandbox()
return
endif
if has('nvim') && !empty(a:output) && empty(a:output[-1])
call remove(a:output, -1)
endif
try
let l:loclist = ale#util#GetFunction(l:linter.callback)(a:buffer, a:output)
" Handle the function being unknown, or being deleted.
catch /E700/
let l:loclist = []
endtry
call ale#engine#HandleLoclist(l:linter.name, a:buffer, l:loclist, 0)
endfunction
function! ale#engine#SetResults(buffer, loclist) abort
let l:linting_is_done = !ale#engine#IsCheckingBuffer(a:buffer)
if g:ale_use_neovim_diagnostics_api
call ale#engine#SendResultsToNeovimDiagnostics(a:buffer, a:loclist)
endif
" Set signs first. This could potentially fix some line numbers.
" The List could be sorted again here by SetSigns.
if !g:ale_use_neovim_diagnostics_api && g:ale_set_signs
call ale#sign#SetSigns(a:buffer, a:loclist)
endif
if g:ale_set_quickfix || g:ale_set_loclist
call ale#list#SetLists(a:buffer, a:loclist)
endif
if exists('*ale#statusline#Update')
" Don't load/run if not already loaded.
call ale#statusline#Update(a:buffer, a:loclist)
endif
if !g:ale_use_neovim_diagnostics_api && g:ale_set_highlights
call ale#highlight#SetHighlights(a:buffer, a:loclist)
endif
if !g:ale_use_neovim_diagnostics_api
\&& (g:ale_virtualtext_cursor is# 'all' || g:ale_virtualtext_cursor == 2)
call ale#virtualtext#SetTexts(a:buffer, a:loclist)
endif
if l:linting_is_done
if g:ale_echo_cursor
" Try and echo the warning now.
" This will only do something meaningful if we're in normal mode.
call ale#cursor#EchoCursorWarning()
endif
if !g:ale_use_neovim_diagnostics_api
\&& (g:ale_virtualtext_cursor is# 'current' || g:ale_virtualtext_cursor == 1)
" Try and show the warning now.
" This will only do something meaningful if we're in normal mode.
call ale#virtualtext#ShowCursorWarning()
endif
" Reset the save event marker, used for opening windows, etc.
call setbufvar(a:buffer, 'ale_save_event_fired', 0)
" Set a marker showing how many times a buffer has been checked.
call setbufvar(
\ a:buffer,
\ 'ale_linted',
\ getbufvar(a:buffer, 'ale_linted', 0) + 1
\)
" Automatically remove all managed temporary files and directories
" now that all jobs have completed.
call ale#command#RemoveManagedFiles(a:buffer)
" Call user autocommands. This allows users to hook into ALE's lint cycle.
silent doautocmd <nomodeline> User ALELintPost
endif
endfunction
function! ale#engine#SendResultsToNeovimDiagnostics(buffer, loclist) abort
if !has('nvim-0.6')
" We will warn the user on startup as well if they try to set
" g:ale_use_neovim_diagnostics_api outside of a Neovim context.
return
endif
" Keep the Lua surface area really small in the VimL part of ALE,
" and just require the diagnostics.lua module on demand.
let l:SendDiagnostics = luaeval('require("diagnostics").sendAleResultsToDiagnostics')
call l:SendDiagnostics(a:buffer, a:loclist)
endfunction
function! s:RemapItemTypes(type_map, loclist) abort
for l:item in a:loclist
let l:key = l:item.type
\ . (get(l:item, 'sub_type', '') is# 'style' ? 'S' : '')
let l:new_key = get(a:type_map, l:key, '')
if l:new_key is# 'E'
\|| l:new_key is# 'ES'
\|| l:new_key is# 'W'
\|| l:new_key is# 'WS'
\|| l:new_key is# 'I'
let l:item.type = l:new_key[0]
if l:new_key is# 'ES' || l:new_key is# 'WS'
let l:item.sub_type = 'style'
elseif has_key(l:item, 'sub_type')
call remove(l:item, 'sub_type')
endif
endif
endfor
endfunction
function! ale#engine#FixLocList(buffer, linter_name, from_other_source, loclist) abort
let l:mappings = ale#GetFilenameMappings(a:buffer, a:linter_name)
if !empty(l:mappings)
" We need to apply reverse filename mapping here.
let l:mappings = ale#filename_mapping#Invert(l:mappings)
endif
let l:bufnr_map = {}
let l:new_loclist = []
" Some errors have line numbers beyond the end of the file,
" so we need to adjust them so they set the error at the last line
" of the file instead.
let l:last_line_number = ale#util#GetLineCount(a:buffer)
for l:old_item in a:loclist
" Copy the loclist item with some default values and corrections.
"
" line and column numbers will be converted to numbers.
" The buffer will default to the buffer being checked.
" The vcol setting will default to 0, a byte index.
" The error type will default to 'E' for errors.
" The error number will default to -1.
"
" The line number and text are the only required keys.
"
" The linter_name will be set on the errors so it can be used in
" output, filtering, etc..
let l:item = {
\ 'bufnr': a:buffer,
\ 'text': l:old_item.text,
\ 'lnum': str2nr(l:old_item.lnum),
\ 'col': str2nr(get(l:old_item, 'col', 0)),
\ 'vcol': 0,
\ 'type': get(l:old_item, 'type', 'E'),
\ 'nr': get(l:old_item, 'nr', -1),
\ 'linter_name': a:linter_name,
\}
if a:from_other_source
let l:item.from_other_source = 1
endif
if has_key(l:old_item, 'code')
let l:item.code = l:old_item.code
endif
let l:old_name = get(l:old_item, 'filename', '')
" Map parsed from output to local filesystem files.
if !empty(l:old_name) && !empty(l:mappings)
let l:old_name = ale#filename_mapping#Map(l:old_name, l:mappings)
endif
if !empty(l:old_name) && !ale#path#IsTempName(l:old_name)
" Use the filename given.
" Temporary files are assumed to be for this buffer,
" and the filename is not included then, because it looks bad
" in the loclist window.
let l:filename = l:old_name
let l:item.filename = l:filename
if has_key(l:old_item, 'bufnr')
" If a buffer number is also given, include that too.
" If Vim detects that he buffer number is valid, it will
" be used instead of the filename.
let l:item.bufnr = l:old_item.bufnr
elseif has_key(l:bufnr_map, l:filename)
" Get the buffer number from the map, which can be faster.
let l:item.bufnr = l:bufnr_map[l:filename]
else
" Look up the buffer number.
let l:item.bufnr = bufnr(l:filename)
let l:bufnr_map[l:filename] = l:item.bufnr
endif
elseif has_key(l:old_item, 'bufnr')
let l:item.bufnr = l:old_item.bufnr
endif
if has_key(l:old_item, 'detail')
let l:item.detail = l:old_item.detail
endif
" Pass on a end_col key if set, used for highlights.
if has_key(l:old_item, 'end_col')
let l:item.end_col = str2nr(l:old_item.end_col)
endif
if has_key(l:old_item, 'end_lnum')
let l:item.end_lnum = str2nr(l:old_item.end_lnum)
" When the error ends after the end of the file, put it at the
" end. This is only done for the current buffer.
if l:item.bufnr == a:buffer && l:item.end_lnum > l:last_line_number
let l:item.end_lnum = l:last_line_number
endif
endif
if has_key(l:old_item, 'sub_type')
let l:item.sub_type = l:old_item.sub_type
endif
if l:item.lnum < 1
" When errors appear before line 1, put them at line 1.
let l:item.lnum = 1
elseif l:item.bufnr == a:buffer && l:item.lnum > l:last_line_number
" When errors go beyond the end of the file, put them at the end.
" This is only done for the current buffer.
let l:item.lnum = l:last_line_number
elseif get(l:old_item, 'vcol', 0)
" Convert virtual column positions to byte positions.
" The positions will be off if the buffer has changed recently.
let l:line = getbufline(a:buffer, l:item.lnum)[0]
let l:item.col = ale#util#Col(l:line, l:item.col)
if has_key(l:item, 'end_col')
let l:end_line = get(l:item, 'end_lnum', l:line) != l:line
\ ? getbufline(a:buffer, l:item.end_lnum)[0]
\ : l:line
let l:item.end_col = ale#util#Col(l:end_line, l:item.end_col)
endif
endif
call add(l:new_loclist, l:item)
endfor
let l:type_map = get(ale#Var(a:buffer, 'type_map'), a:linter_name, {})
if !empty(l:type_map)
call s:RemapItemTypes(l:type_map, l:new_loclist)
endif
return l:new_loclist
endfunction
" Given part of a command, replace any % with %%, so that no characters in
" the string will be replaced with filenames, etc.
function! ale#engine#EscapeCommandPart(command_part) abort
" TODO: Emit deprecation warning here later.
return ale#command#EscapeCommandPart(a:command_part)
endfunction
" Run a job.
"
" Returns 1 when a job was started successfully.
function! s:RunJob(command, options) abort
if ale#command#IsDeferred(a:command)
let a:command.result_callback = {
\ command -> s:RunJob(command, a:options)
\}
return 1
endif
let l:command = a:command
if empty(l:command)
return 0
endif
let l:cwd = a:options.cwd
let l:executable = a:options.executable
let l:buffer = a:options.buffer
let l:linter = a:options.linter
let l:output_stream = a:options.output_stream
let l:read_buffer = a:options.read_buffer && !a:options.lint_file
let l:info = g:ale_buffer_info[l:buffer]
let l:Callback = function('s:HandleExit', [{
\ 'linter': l:linter,
\ 'executable': l:executable,
\}])
let l:result = ale#command#Run(l:buffer, l:command, l:Callback, {
\ 'cwd': l:cwd,
\ 'output_stream': l:output_stream,
\ 'executable': l:executable,
\ 'read_buffer': l:read_buffer,
\ 'log_output': 1,
\ 'filename_mappings': ale#GetFilenameMappings(l:buffer, l:linter.name),
\})
" Only proceed if the job is being run.
if empty(l:result)
return 0
endif
call ale#engine#MarkLinterActive(l:info, l:linter)
silent doautocmd <nomodeline> User ALEJobStarted
return 1
endfunction
function! s:StopCurrentJobs(buffer, clear_lint_file_jobs, linter_slots) abort
let l:info = get(g:ale_buffer_info, a:buffer, {})
call ale#command#StopJobs(a:buffer, 'linter')
" Update the active linter list, clearing out anything not running.
if a:clear_lint_file_jobs
call ale#command#StopJobs(a:buffer, 'file_linter')
let l:info.active_linter_list = []
else
let l:lint_file_map = {}
" Use a previously computed map of `lint_file` values to find
" linters that are used for linting files.
for [l:lint_file, l:linter] in a:linter_slots
if l:lint_file is 1
let l:lint_file_map[l:linter.name] = 1
endif
endfor
" Keep jobs for linting files when we're only linting buffers.
call filter(l:info.active_linter_list, 'get(l:lint_file_map, v:val.name)')
endif
endfunction
function! ale#engine#Stop(buffer) abort
call s:StopCurrentJobs(a:buffer, 1, [])
endfunction
function! s:RemoveProblemsForDisabledLinters(buffer, linters) abort
" Figure out which linters are still enabled, and remove
" problems for linters which are no longer enabled.
" Problems from other sources will be kept.
let l:name_map = {}
for l:linter in a:linters
let l:name_map[l:linter.name] = 1
endfor
call filter(
\ get(g:ale_buffer_info[a:buffer], 'loclist', []),
\ 'get(v:val, ''from_other_source'') || get(l:name_map, get(v:val, ''linter_name''))',
\)
endfunction
function! s:AddProblemsFromOtherBuffers(buffer, linters) abort
let l:filename = expand('#' . a:buffer . ':p')
let l:loclist = []
let l:name_map = {}
" Build a map of the active linters.
for l:linter in a:linters
let l:name_map[l:linter.name] = 1
endfor
" Find the items from other buffers, for the linters that are enabled.
for l:info in values(g:ale_buffer_info)
for l:item in l:info.loclist
if has_key(l:item, 'filename')
\&& l:item.filename is# l:filename
\&& has_key(l:name_map, l:item.linter_name)
" Copy the items and set the buffer numbers to this one.
let l:new_item = copy(l:item)
let l:new_item.bufnr = a:buffer
call add(l:loclist, l:new_item)
endif
endfor
endfor
if !empty(l:loclist)
call sort(l:loclist, function('ale#util#LocItemCompareWithText'))
call uniq(l:loclist, function('ale#util#LocItemCompareWithText'))
" Set the loclist variable, used by some parts of ALE.
let g:ale_buffer_info[a:buffer].loclist = l:loclist
call ale#engine#SetResults(a:buffer, l:loclist)
endif
endfunction
function! s:AddLinterError(buffer, linter) abort
let l:output = []
call add(l:output, {
\ 'lnum': 1,
\ 'end_lnum': ale#util#GetLineCount(a:buffer),
\ 'text': 'Linter failure (' . a:linter . ')',
\ 'detail': 'Failed to execute ' . a:linter,
\ 'type': 'E'}
\)
call ale#other_source#ShowResults(bufnr(''), 'ale-vim', l:output)
endfunction
function! s:RunIfExecutable(buffer, linter, lint_file, executable) abort
if ale#command#IsDeferred(a:executable)
let a:executable.result_callback = {
\ executable -> s:RunIfExecutable(
\ a:buffer,
\ a:linter,
\ a:lint_file,
\ executable
\ )
\}
return 1
endif
if ale#engine#IsExecutable(a:buffer, a:executable)
" Use different job types for file or linter jobs.
let l:job_type = a:lint_file ? 'file_linter' : 'linter'
call setbufvar(a:buffer, 'ale_job_type', l:job_type)
" Get the cwd for the linter and set it before we call GetCommand.
" This will ensure that ale#command#Run uses it by default.
let l:cwd = ale#linter#GetCwd(a:buffer, a:linter)
if l:cwd isnot v:null
call ale#command#SetCwd(a:buffer, l:cwd)
endif
let l:command = ale#linter#GetCommand(a:buffer, a:linter)
if l:cwd isnot v:null
call ale#command#ResetCwd(a:buffer)
endif
let l:options = {
\ 'cwd': l:cwd,
\ 'executable': a:executable,
\ 'buffer': a:buffer,
\ 'linter': a:linter,
\ 'output_stream': get(a:linter, 'output_stream', 'stdout'),
\ 'read_buffer': a:linter.read_buffer,
\ 'lint_file': a:lint_file,
\}
return s:RunJob(l:command, l:options)
else
if ale#Var(a:buffer, 'error_on_lint_fail')
call s:AddLinterError(a:buffer, a:executable)
endif
endif
return 0
endfunction
" Run a linter for a buffer.
"
" Returns 1 if the linter was successfully run.
function! s:RunLinter(buffer, linter, lint_file) abort
if !empty(a:linter.lsp)
return ale#lsp_linter#CheckWithLSP(a:buffer, a:linter)
else
let l:executable = ale#linter#GetExecutable(a:buffer, a:linter)
return s:RunIfExecutable(a:buffer, a:linter, a:lint_file, l:executable)
endif
return 0
endfunction
function! s:GetLintFileSlots(buffer, linters) abort
let l:linter_slots = []
for l:linter in a:linters
let l:LintFile = l:linter.lint_file
if type(l:LintFile) is v:t_func
let l:LintFile = l:LintFile(a:buffer)
endif
call add(l:linter_slots, [l:LintFile, l:linter])
endfor
return l:linter_slots
endfunction
function! s:GetLintFileValues(slots, Callback) abort
let l:deferred_list = []
let l:new_slots = []
for [l:lint_file, l:linter] in a:slots
while ale#command#IsDeferred(l:lint_file) && has_key(l:lint_file, 'value')
" If we've already computed the return value, use it.
let l:lint_file = l:lint_file.value
endwhile
if ale#command#IsDeferred(l:lint_file)
" If we are going to return the result later, wait for it.
call add(l:deferred_list, l:lint_file)
else
" If we have the value now, coerce it to 0 or 1.
let l:lint_file = l:lint_file is 1
endif
call add(l:new_slots, [l:lint_file, l:linter])
endfor
if !empty(l:deferred_list)
for l:deferred in l:deferred_list
let l:deferred.result_callback =
\ {-> s:GetLintFileValues(l:new_slots, a:Callback)}
endfor
else
call a:Callback(l:new_slots)
endif
endfunction
function! s:RunLinters(
\ buffer,
\ linters,
\ slots,
\ should_lint_file,
\ new_buffer,
\) abort
call s:StopCurrentJobs(a:buffer, a:should_lint_file, a:slots)
call s:RemoveProblemsForDisabledLinters(a:buffer, a:linters)
" We can only clear the results if we aren't checking the buffer.
let l:can_clear_results = !ale#engine#IsCheckingBuffer(a:buffer)
silent doautocmd <nomodeline> User ALELintPre
for [l:lint_file, l:linter] in a:slots
" Only run lint_file linters if we should.
if !l:lint_file || a:should_lint_file
if s:RunLinter(a:buffer, l:linter, l:lint_file)
" If a single linter ran, we shouldn't clear everything.
let l:can_clear_results = 0
endif
else
" If we skipped running a lint_file linter still in the list,
" we shouldn't clear everything.
let l:can_clear_results = 0
endif
endfor
" Clear the results if we can. This needs to be done when linters are
" disabled, or ALE itself is disabled.
if l:can_clear_results
call ale#engine#SetResults(a:buffer, [])
elseif a:new_buffer
call s:AddProblemsFromOtherBuffers(
\ a:buffer,
\ map(copy(a:slots), 'v:val[1]')
\)
endif
endfunction
function! ale#engine#RunLinters(buffer, linters, should_lint_file) abort
" Initialise the buffer information if needed.
let l:new_buffer = ale#engine#InitBufferInfo(a:buffer)
call s:GetLintFileValues(
\ s:GetLintFileSlots(a:buffer, a:linters),
\ {
\ slots -> s:RunLinters(
\ a:buffer,
\ a:linters,
\ slots,
\ a:should_lint_file,
\ l:new_buffer,
\ )
\ }
\)
endfunction
" Clean up a buffer.
"
" This function will stop all current jobs for the buffer,
" clear the state of everything, and remove the Dictionary for managing
" the buffer.
function! ale#engine#Cleanup(buffer) abort
" Don't bother with cleanup code when newer NeoVim versions are exiting.
if get(v:, 'exiting', v:null) isnot v:null
return
endif
if exists('*ale#lsp#CloseDocument')
call ale#lsp#CloseDocument(a:buffer)
endif
if !has_key(g:ale_buffer_info, a:buffer)
return
endif
call ale#engine#RunLinters(a:buffer, [], 1)
call remove(g:ale_buffer_info, a:buffer)
endfunction
" Given a buffer number, return the warnings and errors for a given buffer.
function! ale#engine#GetLoclist(buffer) abort
if !has_key(g:ale_buffer_info, a:buffer)
return []
endif
return g:ale_buffer_info[a:buffer].loclist
endfunction
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