Fix test for echoing messages

The previous linter rule about stray echo lines has been restored, and
now all problems for custom linting rules can be ignored by adding a
comment above problem lines.

autoload/ale/completion.vim

@@ -776,7 +776,8 @@ function! s:OnReady(linter, lsp_details) abort
 
     if a:linter.lsp is# 'tsserver'
         if get(g:, 'ale_completion_tsserver_autoimport') is 1
-            execute 'echom `g:ale_completion_tsserver_autoimport` is deprecated. Use `g:ale_completion_autoimport` instead.'''
+            " no-custom-checks
+            echom '`g:ale_completion_tsserver_autoimport` is deprecated. Use `g:ale_completion_autoimport` instead.'
         endif
 
         let l:message = ale#lsp#tsserver_message#Completions(

autoload/ale/cursor.vim

@@ -10,6 +10,12 @@ let g:ale_echo_msg_format = get(g:, 'ale_echo_msg_format', '%code: %%s')
 
 let s:cursor_timer = -1
 
+" A wrapper for echon so we can test messages we echo in Vader tests.
+function! ale#cursor#Echon(message) abort
+    " no-custom-checks
+    echon a:message
+endfunction
+
 function! ale#cursor#TruncatedEcho(original_message) abort
     let l:message = a:original_message
     " Change tabs to spaces.
@@ -37,7 +43,7 @@ function! ale#cursor#TruncatedEcho(original_message) abort
                 let l:message = l:message[:&columns - 5] . '...'
             endif
 
-            echon l:message
+            call ale#cursor#Echon(l:message)
         catch /^Vim\%((\a\+)\)\=:E523/
             " Fallback into manual truncate (#1987)
             let l:winwidth = winwidth(0)
@@ -97,7 +103,9 @@ function! ale#cursor#EchoCursorWarning(...) abort
         elseif get(l:info, 'echoed')
             " We'll only clear the echoed message when moving off errors once,
             " so we don't continually clear the echo line.
-            execute 'echo'
+            "
+            " no-custom-checks
+            echo
             let l:info.echoed = 0
         endif
     endif
@@ -160,7 +168,8 @@ function! s:ShowCursorDetailForItem(loc, options) abort
 
         " Clear the echo message if we manually displayed details.
         if !l:stay_here
-            execute 'echo'
+            " no-custom-checks
+            echo
         endif
     endif
 endfunction

autoload/ale/debugging.vim

@@ -62,7 +62,8 @@ let s:global_variable_list = [
 \]
 
 function! s:Echo(message) abort
-    execute 'echo a:message'
+    " no-custom-checks
+    echo a:message
 endfunction
 
 function! s:GetLinterVariables(filetype, exclude_linter_names) abort

autoload/ale/fix.vim

@@ -77,7 +77,8 @@ function! ale#fix#ApplyFixes(buffer, output) abort
             call remove(g:ale_fix_buffer_data, a:buffer)
 
             if !l:data.ignore_file_changed_errors
-                execute 'echoerr ''The file was changed before fixing finished'''
+                " no-custom-checks
+                echoerr 'The file was changed before fixing finished'
             endif
 
             return
@@ -358,7 +359,8 @@ function! ale#fix#Fix(buffer, fixing_flag, ...) abort
             \   'There is no fixer named `%s`. Check :ALEFixSuggest',
             \   l:function_name,
             \)
-            execute 'echom l:echo_message'
+            " no-custom-checks
+            echom l:echo_message
         endif
 
         return 0
@@ -366,7 +368,8 @@ function! ale#fix#Fix(buffer, fixing_flag, ...) abort
 
     if empty(l:callback_list)
         if a:fixing_flag is# ''
-            execute 'echom ''No fixers have been defined. Try :ALEFixSuggest'''
+            " no-custom-checks
+            echom 'No fixers have been defined. Try :ALEFixSuggest'
         endif
 
         return 0

autoload/ale/floating_preview.vim

@@ -7,7 +7,8 @@
 
 function! ale#floating_preview#Show(lines, ...) abort
     if !exists('*nvim_open_win') && !has('popupwin')
-        execute 'echom ''Floating windows not supported in this vim instance.'''
+        " no-custom-checks
+        echom 'Floating windows not supported in this vim instance.'
 
         return
     endif

autoload/ale/toggle.vim

@@ -64,7 +64,8 @@ function! ale#toggle#ToggleBuffer(buffer) abort
     " Disabling ALE globally removes autocmd events, so we cannot enable
     " linting locally when linting is disabled globally
     if l:enabled && !g:ale_enabled
-        execute 'echom ''ALE cannot be enabled locally when disabled globally'''
+        " no-custom-checks
+        echom 'ALE cannot be enabled locally when disabled globally'
 
         return
     endif

autoload/ale/uri/jdt.vim

@@ -3,7 +3,8 @@
 
 function! s:OpenJDTLink(root, uri, line, column, options, result) abort
     if has_key(a:result, 'error')
-        execute 'echoerr a:result.error.message'
+        " no-custom-checks
+        echoerr a:result.error.message
 
         return
     endif
@@ -11,7 +12,8 @@ function! s:OpenJDTLink(root, uri, line, column, options, result) abort
     let l:contents = a:result['result']
 
     if type(l:contents) is# type(v:null)
-        execute 'echoerr ''File content not found'''
+        " no-custom-checks
+        echoerr 'File content not found'
     endif
 
     " disable autocmd when opening buffer
@@ -59,7 +61,8 @@ endfunction
 
 function! s:ReadClassFileContents(uri, result) abort
     if has_key(a:result, 'error')
-        execute 'echoerr a:result.error.message'
+        " no-custom-checks
+        echoerr a:result.error.message
 
         return
     endif
@@ -67,7 +70,8 @@ function! s:ReadClassFileContents(uri, result) abort
     let l:contents = a:result['result']
 
     if type(l:contents) is# type(v:null)
-        execute 'echoerr ''File content not found'''
+        " no-custom-checks
+        echoerr 'File content not found'
     endif
 
     call setline(1, split(l:contents, '\n'))

autoload/ale/util.vim

@@ -25,7 +25,8 @@ function! ale#util#ShowMessage(string, ...) abort
 
     " We have to assume the user is using a monospace font.
     if has('nvim') || (a:string !~? "\n" && len(a:string) < &columns)
-        execute 'echo a:string'
+        " no-custom-checks
+        echo a:string
     else
         call ale#preview#Show(split(a:string, "\n"), extend(
         \   {

doc/ale-development.txt

@@ -98,8 +98,8 @@ should also follow some additional rules designed to prevent mistakes. Some of
 these are reported with ALE's `custom-linting-rules` script. See
 |ale-development-tests|.
 
-* Don't leave stray `:echo` lines in code. Use `execute 'echo' ...` if you must
-  echo something.
+* Don't leave stray `:echo` lines in code. Write `" no-custom-checks` above
+  the line if you must echo something.
 * For strings use |is#| instead of |==#|, `is?` instead of `==?`, `isnot#`
   instead of `!=#`, and `isnot?` instead of `!=?`. This is because `'x' ==# 0`
   returns 1, while `'x' is# 0` returns 0, so you will experience fewer issues

plugin/ale.vim

@@ -24,8 +24,10 @@ endif
 if !s:has_features
     " Only output a warning if editing some special files.
     if index(['', 'gitcommit'], &filetype) == -1
-        execute 'echoerr ''ALE requires NeoVim >= 0.2.0 or Vim 8 with +timers +job +channel'''
-        execute 'echoerr ''Please update your editor appropriately.'''
+        " no-custom-checks
+        echoerr 'ALE requires NeoVim >= 0.2.0 or Vim 8 with +timers +job +channel'
+        " no-custom-checks
+        echoerr 'Please update your editor appropriately.'
     endif
 
     " Stop here, as it won't work.

test/script/custom-linting-rules

@@ -73,6 +73,17 @@ check_errors() {
     for directory in "${directories[@]}"; do
         # shellcheck disable=SC2086
         while read -r; do
+            line=$(cut -d ":" -f2 <<< "$REPLY")
+
+            if ((line > 1)); then
+                line=$((line - 1))
+                file=$(cut -d ":" -f1 <<< "$REPLY")
+
+                if sed -n "${line},${line}p" $file | grep -q '^ *" *no-custom-checks$'; then
+                    continue
+                fi
+            fi
+
             RETURN_CODE=1
             echo "$REPLY $message"
         done < <(grep -H -n "$regex" $include_arg $exclude_arg "$directory"/**/*.vim \
@@ -125,7 +136,7 @@ check_errors '==#' "Use 'is#' instead of '==#'. 0 ==# 'foobar' is true"
 check_errors '==?' "Use 'is?' instead of '==?'. 0 ==? 'foobar' is true"
 check_errors '!=#' "Use 'isnot#' instead of '!=#'. 0 !=# 'foobar' is false"
 check_errors '!=?' "Use 'isnot?' instead of '!=?'. 0 !=? 'foobar' is false"
-check_errors '^ *:\?echo\>' "Stray echo line. Use \`execute echo\` if you want to echo something"
+check_errors '^ *:\?echo' "Stray echo line. Ignore with \" no-custom-checks if needed"
 check_errors '^ *:\?redir' 'User execute() instead of redir'
 # Exclusions for grandfathered-in exceptions
 exclusions="clojure/clj_kondo.vim elixir/elixir_ls.vim go/golangci_lint.vim swift/swiftformat.vim"

test/test_cursor_warnings.vader

@@ -85,14 +85,12 @@ Before:
   let g:ale_set_highlights = 0
   let g:ale_echo_cursor = 1
 
-  function GetLastMessage()
-    redir => l:output
-      silent mess
-    redir END
+  runtime autoload/ale/cursor.vim
 
-    let l:lines = split(l:output, "\n")
+  let g:last_message = ''
 
-    return empty(l:lines) ? '' : l:lines[-1]
+  function! ale#cursor#Echon(message) abort
+    let g:last_message = a:message
   endfunction
 
   call ale#linter#Reset()
@@ -101,6 +99,10 @@ Before:
 After:
   Restore
 
+  unlet! g:last_message
+
+  runtime autoload/ale/cursor.vim
+
   call cursor(1, 1)
 
   let g:ale_set_loclist = 1
@@ -112,8 +114,6 @@ After:
   unlet! g:output
   unlet! b:ale_loclist_msg_format
 
-  delfunction GetLastMessage
-
   " Clearing the messages breaks tests on NeoVim for some reason, but all
   " we need to do for these tests is just make it so the last message isn't
   " carried over between test cases.
@@ -135,19 +135,19 @@ Execute(Messages should be shown for the correct lines):
   call cursor(1, 1)
   call ale#cursor#EchoCursorWarning()
 
-  AssertEqual 'semi: Missing semicolon.', GetLastMessage()
+  AssertEqual 'semi: Missing semicolon.', g:last_message
 
 Execute(Messages should be shown for earlier columns):
   call cursor(2, 1)
   call ale#cursor#EchoCursorWarning()
 
-  AssertEqual 'space-infix-ops: Infix operators must be spaced.', GetLastMessage()
+  AssertEqual 'space-infix-ops: Infix operators must be spaced.', g:last_message
 
 Execute(Messages should be shown for later columns):
   call cursor(2, 16)
   call ale#cursor#EchoCursorWarning()
 
-  AssertEqual 'radix: Missing radix parameter', GetLastMessage()
+  AssertEqual 'radix: Missing radix parameter', g:last_message
 
 Execute(The message at the cursor should be shown when linting ends):
   call cursor(1, 1)
@@ -156,13 +156,13 @@ Execute(The message at the cursor should be shown when linting ends):
   \ g:ale_buffer_info[bufnr('%')].loclist,
   \)
 
-  AssertEqual 'semi: Missing semicolon.', GetLastMessage()
+  AssertEqual 'semi: Missing semicolon.', g:last_message
 
 Execute(The message at the cursor should be shown on InsertLeave):
   call cursor(2, 9)
   doautocmd InsertLeave
 
-  AssertEqual 'space-infix-ops: Infix operators must be spaced.', GetLastMessage()
+  AssertEqual 'space-infix-ops: Infix operators must be spaced.', g:last_message
 
 Execute(ALEDetail should print 'detail' attributes):
   call cursor(1, 1)
@@ -187,7 +187,7 @@ Execute(ALEDetail should not capitlise cursor messages):
   call cursor(3, 1)
   call ale#cursor#EchoCursorWarning()
 
-  AssertEqual 'lowercase error', GetLastMessage()
+  AssertEqual 'lowercase error', g:last_message
 
 Execute(The linter name should be formatted into the message correctly):
   let g:ale_echo_msg_format = '%linter%: %s'
@@ -197,7 +197,7 @@ Execute(The linter name should be formatted into the message correctly):
 
   AssertEqual
   \ 'bettercode: Infix operators must be spaced.',
-  \ GetLastMessage()
+  \ g:last_message
 
 Execute(The severity should be formatted into the message correctly):
   let g:ale_echo_msg_format = '%severity%: %s'
@@ -207,17 +207,17 @@ Execute(The severity should be formatted into the message correctly):
 
   AssertEqual
   \ 'Warning: Infix operators must be spaced.',
-  \ GetLastMessage()
+  \ g:last_message
 
   call cursor(1, 10)
   call ale#cursor#EchoCursorWarning()
 
-  AssertEqual 'Error: Missing semicolon.', GetLastMessage()
+  AssertEqual 'Error: Missing semicolon.', g:last_message
 
   call cursor(1, 14)
   call ale#cursor#EchoCursorWarning()
 
-  AssertEqual 'Info: Some information', GetLastMessage()
+  AssertEqual 'Info: Some information', g:last_message
 
 Execute(The %code% and %ifcode% should show the code and some text):
   let g:ale_echo_msg_format = '%(code) %%s'
@@ -227,7 +227,7 @@ Execute(The %code% and %ifcode% should show the code and some text):
 
   AssertEqual
   \ '(space-infix-ops) Infix operators must be spaced.',
-  \ GetLastMessage()
+  \ g:last_message
 
 Execute(The %code% and %ifcode% should be removed when there's no code):
   let g:ale_echo_msg_format = '%(code) %%s'
@@ -235,7 +235,7 @@ Execute(The %code% and %ifcode% should be removed when there's no code):
   call cursor(1, 14)
   call ale#cursor#EchoCursorWarning()
 
-  AssertEqual 'Some information', GetLastMessage()
+  AssertEqual 'Some information', g:last_message
 
 Execute(The buffer message format option should take precedence):
   let g:ale_echo_msg_format = '%(code) %%s'
@@ -244,13 +244,13 @@ Execute(The buffer message format option should take precedence):
   call cursor(1, 14)
   call ale#cursor#EchoCursorWarning()
 
-  AssertEqual 'FOO Some information', GetLastMessage()
+  AssertEqual 'FOO Some information', g:last_message
 
 Execute(The cursor message shouldn't be echoed if the option is off):
   let g:ale_echo_cursor = 0
-  echom 'foo'
+  let g:last_message = 'foo'
 
   call cursor(1, 1)
   call ale#cursor#EchoCursorWarning()
 
-  AssertEqual 'foo', GetLastMessage()
+  AssertEqual 'foo', g:last_message