Close #3003 - Show ignored linters in :ALEInfo

autoload/ale.vim

@@ -100,13 +100,7 @@ function! s:Lint(buffer, should_lint_file, timer_id) abort
     " Use the filetype from the buffer
     let l:filetype = getbufvar(a:buffer, '&filetype')
     let l:linters = ale#linter#Get(l:filetype)
-
-    " Apply ignore lists for linters only if needed.
-    let l:ignore_config = ale#Var(a:buffer, 'linters_ignore')
-    let l:disable_lsp = ale#Var(a:buffer, 'disable_lsp')
-    let l:linters = !empty(l:ignore_config) || l:disable_lsp
-    \   ? ale#engine#ignore#Exclude(l:filetype, l:linters, l:ignore_config, l:disable_lsp)
-    \   : l:linters
+    let l:linters = ale#linter#RemoveIgnored(a:buffer, l:filetype, l:linters)
 
     " Tell other sources that they can start checking the buffer now.
     let g:ale_want_results_buffer = a:buffer

autoload/ale/debugging.vim

@@ -8,6 +8,7 @@ let s:global_variable_list = [
 \    'ale_completion_delay',
 \    'ale_completion_enabled',
 \    'ale_completion_max_suggestions',
+\    'ale_disable_lsp',
 \    'ale_echo_cursor',
 \    'ale_echo_msg_error_str',
 \    'ale_echo_msg_format',
@@ -28,6 +29,7 @@ let s:global_variable_list = [
 \    'ale_linter_aliases',
 \    'ale_linters',
 \    'ale_linters_explicit',
+\    'ale_linters_ignore',
 \    'ale_list_vertical',
 \    'ale_list_window_size',
 \    'ale_loclist_msg_format',
@@ -196,6 +198,7 @@ function! s:EchoLSPErrorMessages(all_linter_names) abort
 endfunction
 
 function! ale#debugging#Info() abort
+    let l:buffer = bufnr('')
     let l:filetype = &filetype
 
     " We get the list of enabled linters for free by the above function.
@@ -222,10 +225,20 @@ function! ale#debugging#Info() abort
     let l:fixers = uniq(sort(l:fixers[0] + l:fixers[1]))
     let l:fixers_string = join(map(copy(l:fixers), '"\n  " . v:val'), '')
 
+    let l:non_ignored_names = map(
+    \   copy(ale#linter#RemoveIgnored(l:buffer, l:filetype, l:enabled_linters)),
+    \   'v:val[''name'']',
+    \)
+    let l:ignored_names = filter(
+    \   copy(l:enabled_names),
+    \   'index(l:non_ignored_names, v:val) < 0'
+    \)
+
     call s:Echo(' Current Filetype: ' . l:filetype)
     call s:Echo('Available Linters: ' . string(l:all_names))
     call s:EchoLinterAliases(l:all_linters)
     call s:Echo('  Enabled Linters: ' . string(l:enabled_names))
+    call s:Echo('  Ignored Linters: ' . string(l:ignored_names))
     call s:Echo(' Suggested Fixers: ' . l:fixers_string)
     call s:Echo(' Linter Variables:')
     call s:Echo('')

autoload/ale/linter.vim

@@ -394,6 +394,16 @@ function! ale#linter#Get(original_filetypes) abort
     return reverse(l:combined_linters)
 endfunction
 
+function! ale#linter#RemoveIgnored(buffer, filetype, linters) abort
+    " Apply ignore lists for linters only if needed.
+    let l:ignore_config = ale#Var(a:buffer, 'linters_ignore')
+    let l:disable_lsp = ale#Var(a:buffer, 'disable_lsp')
+
+    return !empty(l:ignore_config) || l:disable_lsp
+    \   ? ale#engine#ignore#Exclude(a:filetype, a:linters, l:ignore_config, l:disable_lsp)
+    \   : a:linters
+endfunction
+
 " Given a buffer and linter, get the executable String for the linter.
 function! ale#linter#GetExecutable(buffer, linter) abort
     let l:Executable = a:linter.executable