Fix #1631 - Disable balloon support for terminals by default

Fix E712 error in ale#lsp#response#GetErrorMessage when receiving string primitives in the error.data field

ale_linters/cs/mcsc.vim

@@ -29,7 +29,7 @@ function! ale_linters#cs#mcsc#GetCommand(buffer) abort
     \   : ''
 
     " register temporary module target file with ale
-    let l:out = tempname()
+    let l:out = ale#util#Tempname()
     call ale#engine#ManageFile(a:buffer, l:out)
 
     " The code is compiled as a module and the output is redirected to a

ale_linters/cuda/nvcc.vim

@@ -10,7 +10,7 @@ endfunction
 
 function! ale_linters#cuda#nvcc#GetCommand(buffer) abort
     " Unused: use ale#util#nul_file
-    " let l:output_file = tempname() . '.ii'
+    " let l:output_file = ale#util#Tempname() . '.ii'
     " call ale#engine#ManageFile(a:buffer, l:output_file)
 
     return ale#Escape(ale_linters#cuda#nvcc#GetExecutable(a:buffer))

ale_linters/elm/make.vim

@@ -128,14 +128,7 @@ function! ale_linters#elm#make#HandleElm018Line(line, output) abort
 endfunction
 
 function! ale_linters#elm#make#FileIsBuffer(path) abort
-    let l:is_windows = has('win32')
+    return ale#path#IsTempName(a:path)
-    let l:temp_dir = l:is_windows ? $TMP : $TMPDIR
-
-    if has('win32')
-        return a:path[0:len(l:temp_dir) - 1] is? l:temp_dir
-    else
-        return a:path[0:len(l:temp_dir) - 1] is# l:temp_dir
-    endif
 endfunction
 
 function! ale_linters#elm#make#ParseMessage(message) abort

ale_linters/erlang/erlc.vim

@@ -3,7 +3,7 @@
 let g:ale_erlang_erlc_options = get(g:, 'ale_erlang_erlc_options', '')
 
 function! ale_linters#erlang#erlc#GetCommand(buffer) abort
-    let l:output_file = tempname()
+    let l:output_file = ale#util#Tempname()
     call ale#engine#ManageFile(a:buffer, l:output_file)
 
     return 'erlc -o ' . ale#Escape(l:output_file)

ale_linters/thrift/thrift.vim

@@ -20,7 +20,7 @@ function! ale_linters#thrift#thrift#GetCommand(buffer) abort
         let l:generators = ['cpp']
     endif
 
-    let l:output_dir = tempname()
+    let l:output_dir = ale#util#Tempname()
     call mkdir(l:output_dir)
     call ale#engine#ManageDirectory(a:buffer, l:output_dir)
 

ale_linters/verilog/verilator.vim

@@ -7,7 +7,7 @@ if !exists('g:ale_verilog_verilator_options')
 endif
 
 function! ale_linters#verilog#verilator#GetCommand(buffer) abort
-    let l:filename = tempname() . '_verilator_linted.v'
+    let l:filename = ale#util#Tempname() . '_verilator_linted.v'
 
     " Create a special filename, so we can detect it in the handler.
     call ale#engine#ManageFile(a:buffer, l:filename)

autoload/ale/command.vim

@@ -13,7 +13,7 @@ function! s:TemporaryFilename(buffer) abort
 
     " Create a temporary filename, <temp_dir>/<original_basename>
     " The file itself will not be created by this function.
-    return tempname() . (has('win32') ? '\' : '/') . l:filename
+    return ale#util#Tempname() . (has('win32') ? '\' : '/') . l:filename
 endfunction
 
 " Given a command string, replace every...

autoload/ale/engine.vim

@@ -98,7 +98,7 @@ endfunction
 
 " Create a new temporary directory and manage it in one go.
 function! ale#engine#CreateDirectory(buffer) abort
-    let l:temporary_directory = tempname()
+    let l:temporary_directory = ale#util#Tempname()
     " Create the temporary directory for the file, unreadable by 'other'
     " users.
     call mkdir(l:temporary_directory, '', 0750)
@@ -221,7 +221,12 @@ function! s:HandleExit(job_id, exit_code) abort
         call ale#history#RememberOutput(l:buffer, a:job_id, l:output[:])
     endif
 
-    let l:loclist = ale#util#GetFunction(l:linter.callback)(l:buffer, l:output)
+    try
+        let l:loclist = ale#util#GetFunction(l:linter.callback)(l:buffer, l:output)
+    " Handle the function being unknown, or being deleted.
+    catch /E700/
+        let l:loclist = []
+    endtry
 
     call ale#engine#HandleLoclist(l:linter.name, l:buffer, l:loclist)
 endfunction

autoload/ale/handlers/haskell.vim

@@ -2,7 +2,7 @@
 " Description: Error handling for the format GHC outputs.
 
 " Remember the directory used for temporary files for Vim.
-let s:temp_dir = fnamemodify(tempname(), ':h')
+let s:temp_dir = fnamemodify(ale#util#Tempname(), ':h')
 " Build part of a regular expression for matching ALE temporary filenames.
 let s:temp_regex_prefix =
 \   '\M'

autoload/ale/lsp/response.vim

@@ -105,11 +105,17 @@ function! ale#lsp#response#GetErrorMessage(response) abort
         return ''
     endif
 
-    " Include the traceback as details, if it's there.
+    " Include the traceback or error data as details, if present.
-    let l:traceback = get(get(a:response.error, 'data', {}), 'traceback', [])
+    let l:error_data = get(a:response.error, 'data', {})
 
-    if type(l:traceback) is type([]) && !empty(l:traceback)
+    if type(l:error_data) is type('')
-        let l:message .= "\n" . join(l:traceback, "\n")
+        let l:message .= "\n" . l:error_data
+    else
+        let l:traceback = get(l:error_data, 'traceback', [])
+
+        if type(l:traceback) is type([]) && !empty(l:traceback)
+            let l:message .= "\n" . join(l:traceback, "\n")
+        endif
     endif
 
     return l:message

autoload/ale/path.vim

@@ -84,7 +84,7 @@ function! ale#path#IsAbsolute(filename) abort
     return a:filename[:0] is# '/' || a:filename[1:2] is# ':\'
 endfunction
 
-let s:temp_dir = ale#path#Simplify(fnamemodify(tempname(), ':h'))
+let s:temp_dir = ale#path#Simplify(fnamemodify(ale#util#Tempname(), ':h'))
 
 " Given a filename, return 1 if the file represents some temporary file
 " created by Vim.

autoload/ale/sign.vim

@@ -45,25 +45,23 @@ if !hlexists('ALESignColumnWithErrors')
     highlight link ALESignColumnWithErrors error
 endif
 
+function! ale#sign#SetUpDefaultColumnWithoutErrorsHighlight() abort
+    redir => l:output
+        0verbose silent highlight SignColumn
+    redir end
+
+    let l:highlight_syntax = join(split(l:output)[2:])
+    let l:match = matchlist(l:highlight_syntax, '\vlinks to (.+)$')
+
+    if !empty(l:match)
+        execute 'highlight link ALESignColumnWithoutErrors ' . l:match[1]
+    elseif l:highlight_syntax isnot# 'cleared'
+        execute 'highlight ALESignColumnWithoutErrors ' . l:highlight_syntax
+    endif
+endfunction
+
 if !hlexists('ALESignColumnWithoutErrors')
-    function! s:SetSignColumnWithoutErrorsHighlight() abort
+    call ale#sign#SetUpDefaultColumnWithoutErrorsHighlight()
-        redir => l:output
-            silent highlight SignColumn
-        redir end
-
-        let l:highlight_syntax = join(split(l:output)[2:])
-
-        let l:match = matchlist(l:highlight_syntax, '\vlinks to (.+)$')
-
-        if !empty(l:match)
-            execute 'highlight link ALESignColumnWithoutErrors ' . l:match[1]
-        elseif l:highlight_syntax isnot# 'cleared'
-            execute 'highlight ALESignColumnWithoutErrors ' . l:highlight_syntax
-        endif
-    endfunction
-
-    call s:SetSignColumnWithoutErrorsHighlight()
-    delfunction s:SetSignColumnWithoutErrorsHighlight
 endif
 
 " Signs show up on the left for error markers.

autoload/ale/util.vim

@@ -268,9 +268,8 @@ endfunction
 " See :help sandbox
 function! ale#util#InSandbox() abort
     try
-        function! s:SandboxCheck() abort
+        let &equalprg=&equalprg
-        endfunction
+    catch /E48/
-    catch /^Vim\%((\a\+)\)\=:E48/
         " E48 is the sandbox error.
         return 1
     endtry
@@ -278,6 +277,25 @@ function! ale#util#InSandbox() abort
     return 0
 endfunction
 
+function! ale#util#Tempname() abort
+    let l:clear_tempdir = 0
+
+    if exists('$TMPDIR') && empty($TMPDIR)
+        let l:clear_tempdir = 1
+        let $TMPDIR = '/tmp'
+    endif
+
+    try
+        let l:name = tempname() " no-custom-checks
+    finally
+        if l:clear_tempdir
+            let $TMPDIR = ''
+        endif
+    endtry
+
+    return l:name
+endfunction
+
 " Given a single line, or a List of lines, and a single pattern, or a List
 " of patterns, return all of the matches for the lines(s) from the given
 " patterns, using matchlist().

doc/ale-development.txt

@@ -111,6 +111,9 @@ these are reported with ALE's `custom-linting-rules` script. See
 * Don't use the `shellescape()` function. It doesn't escape arguments properly
   on Windows. Use `ale#Escape()` instead, which will avoid escaping where it
   isn't needed, and generally escape arguments better on Windows.
+* Don't use the `tempname()` function. It doesn't work when `$TMPDIR` isn't
+  set. Use `ale#util#Tempname()` instead, which temporarily sets `$TMPDIR`
+  appropriately where needed.
 
 Apply the following guidelines when writing Vader test files.
 

doc/ale.txt

@@ -1401,8 +1401,7 @@ g:ale_set_balloons                                         *g:ale_set_balloons*
                                                            *b:ale_set_balloons*
 
   Type: |Number|
-  Default: `(has('balloon_eval') && has('gui_running'))`
+  Default: `has('balloon_eval') && has('gui_running')`
-           `|| (has('balloon_eval_term') && !has('gui_running'))`
 
   When this option is set to `1`, balloon messages will be displayed for
   problems or hover information if available.
@@ -1412,6 +1411,12 @@ g:ale_set_balloons                                         *g:ale_set_balloons*
   supporting "Hover" information, per |ale-hover|, then brief information
   about the symbol under the cursor will be displayed in a balloon.
 
+  Balloons can be enabled for terminal versions of Vim that support balloons,
+  but some versions of Vim will produce strange mouse behavior when balloons
+  are enabled. To configure balloons for your terminal, you should first
+  configure your |ttymouse| setting, and then consider setting
+  `g:ale_set_balloons` to `1` before ALE is loaded.
+
   `b:ale_set_balloons` can be set to `0` to disable balloons for a buffer.
   Balloons cannot be enabled for a specific buffer when not initially enabled
   globally.
@@ -2206,6 +2211,10 @@ ale#linter#Define(filetype, linter)                       *ale#linter#Define()*
                          defined, as LSP linters handle diagnostics
                          automatically. See |ale-lsp-linters|.
 
+                         If the function named does not exist, including if
+                         the function is later deleted, ALE will behave as if
+                         the callback returned an empty list.
+
                          The keys for each item in the List will be handled in
                          the following manner:
                                                            *ale-loclist-format*

plugin/ale.vim

@@ -35,12 +35,6 @@ endif
 " Set this flag so that other plugins can use it, like airline.
 let g:loaded_ale = 1
 
-" Set the TMPDIR environment variable if it is not set automatically.
-" This can automatically fix some environments.
-if has('unix') && empty($TMPDIR)
-    let $TMPDIR = '/tmp'
-endif
-
 " This global variable is used internally by ALE for tracking information for
 " each buffer which linters are being run against.
 let g:ale_buffer_info = {}
@@ -114,10 +108,7 @@ let g:ale_set_highlights = get(g:, 'ale_set_highlights', has('syntax'))
 let g:ale_echo_cursor = get(g:, 'ale_echo_cursor', 1)
 
 " This flag can be set to 0 to disable balloon support.
-let g:ale_set_balloons = get(g:, 'ale_set_balloons',
+let g:ale_set_balloons = get(g:, 'ale_set_balloons', has('balloon_eval') && has('gui_running'))
-\   (has('balloon_eval') && has('gui_running'))
-\   || (has('balloon_eval_term') && !has('gui_running'))
-\)
 
 " This flag can be set to 0 to disable warnings for trailing whitespace
 let g:ale_warn_about_trailing_whitespace = get(g:, 'ale_warn_about_trailing_whitespace', 1)

run-tests

@@ -11,10 +11,9 @@ set -u
 
 image=w0rp/ale
 current_image_id=71553d0ab3e8
-current_digest=sha256:fea0ddf220c080af9d615d86c277cdecbd63682e430cba92fff2014ebf2a5f3a
 
 # Used in all test scripts for running the selected Docker image.
-DOCKER_RUN_IMAGE="$image:$current_image_id"
+DOCKER_RUN_IMAGE="$image"
 export DOCKER_RUN_IMAGE
 
 tests='test/*.vader test/*/*.vader test/*/*/*.vader test/*/*/*.vader'
@@ -110,7 +109,8 @@ fi
 # Delete .swp files in the test directory, which cause Vim 8 to hang.
 find test -name '*.swp' -delete
 
-docker pull "$image"@"$current_digest"
+docker images -q w0rp/ale | grep "^$current_image_id" > /dev/null \
+    || docker pull "$image"
 
 output_dir=$(mktemp -d 2>/dev/null || mktemp -d -t 'mytmpdir')
 

test/handler/test_elmmake_handler.vader

@@ -1,10 +1,7 @@
 Before:
-  let b:tmp = has('win32') ? substitute($TMP, '\\', '\\\\', 'g') : $TMPDIR
-
   runtime ale_linters/elm/make.vim
 
 After:
-  unlet! b:tmp
   unlet! g:config_error_lines
 
   call ale#linter#Reset()
@@ -22,12 +19,12 @@ Execute(The elm-make handler should parse Elm 0.19 general problems correctly):
   \   }
   \ ],
   \ ale_linters#elm#make#Handle(347, [
-  \   '{
+  \   json_encode({
-  \      "type": "error",
+  \     'type': 'error',
-  \      "path": "' . b:tmp . '/Module.elm",
+  \     'path': ale#util#Tempname() . '/Module.elm',
-  \      "title": "UNKNOWN IMPORT",
+  \     'title': 'UNKNOWN IMPORT',
-  \      "message": ["error details\n\n", { "string": "styled details" }]
+  \     'message': ["error details\n\n", { 'string': 'styled details' }]
-  \    }'
+  \   }),
   \ ])
 
 Execute(The elm-make handler should parse Elm 0.19 compilation errors correctly):
@@ -47,7 +44,7 @@ Execute(The elm-make handler should parse Elm 0.19 compilation errors correctly)
   \     'end_lnum': 407,
   \     'end_col': 17,
   \     'type': 'E',
-  \     'text': "error details 2",
+  \     'text': 'error details 2',
   \   },
   \   {
   \     'lnum': 406,
@@ -55,35 +52,35 @@ Execute(The elm-make handler should parse Elm 0.19 compilation errors correctly)
   \     'end_lnum': 406,
   \     'end_col': 93,
   \     'type': 'E',
-  \     'text': "error details 3",
+  \     'text': 'error details 3',
   \   },
   \ ],
   \ ale_linters#elm#make#Handle(347, [
-  \   '{
+  \   json_encode({
-  \      "type": "compile-errors",
+  \      'type': 'compile-errors',
-  \      "errors": [
+  \      'errors': [
   \        {
-  \          "path": "' . b:tmp . '/Module.elm",
+  \          'path': ale#util#Tempname() . '/Module.elm',
-  \          "problems": [
+  \          'problems': [
   \            {
-  \              "title": "TYPE MISMATCH",
+  \              'title': 'TYPE MISMATCH',
-  \              "message": ["error details 1\n\n", { "string": "styled details" }],
+  \              'message': ["error details 1\n\n", { 'string': 'styled details' }],
-  \              "region": { "start": { "line": 404, "column": 1 }, "end": { "line": 408, "column": 18 } }
+  \              'region': { 'start': { 'line': 404, 'column': 1 }, 'end': { 'line': 408, 'column': 18 } }
   \            },
   \            {
-  \              "title": "TYPE MISMATCH",
+  \              'title': 'TYPE MISMATCH',
-  \              "message": ["error details 2"],
+  \              'message': ['error details 2'],
-  \              "region": { "start": {"line": 406, "column": 5}, "end": {"line": 407, "column": 17 } }
+  \              'region': { 'start': {'line': 406, 'column': 5}, 'end': {'line': 407, 'column': 17 } }
   \            },
   \            {
-  \              "title": "TYPE MISMATCH",
+  \              'title': 'TYPE MISMATCH',
-  \              "message": ["error details 3"],
+  \              'message': ['error details 3'],
-  \              "region": { "start": { "line": 406, "column": 5}, "end": {"line": 406, "column": 93 } }
+  \              'region': { 'start': { 'line': 406, 'column': 5}, 'end': {'line': 406, 'column': 93 } }
   \            }
   \          ]
   \        }
   \      ]
-  \    }'
+  \    }),
   \ ])
 
 Execute(The elm-make handler should handle errors in Elm 0.19 imported modules):
@@ -109,33 +106,33 @@ Execute(The elm-make handler should handle errors in Elm 0.19 imported modules):
   \   },
   \ ],
   \ ale_linters#elm#make#Handle(347, [
-  \   '{
+  \   json_encode({
-  \      "type": "error",
+  \      'type': 'error',
-  \      "path": "src/Module.elm",
+  \      'path': 'src/Module.elm',
-  \      "title": "UNKNOWN IMPORT",
+  \      'title': 'UNKNOWN IMPORT',
-  \      "message": ["error details\n\n", { "string": "styled details" }]
+  \      'message': ["error details\n\n", { 'string': 'styled details' }]
-  \    }',
+  \    }),
-  \   '{
+  \   json_encode({
-  \      "type": "error",
+  \      'type': 'error',
-  \      "path": null,
+  \      'path': v:null,
-  \      "title": "UNKNOWN IMPORT",
+  \      'title': 'UNKNOWN IMPORT',
-  \      "message": ["error details\n\n", { "string": "styled details" }]
+  \      'message': ["error details\n\n", { 'string': 'styled details' }]
-  \    }',
+  \    }),
-  \   '{
+  \   json_encode({
-  \      "type": "compile-errors",
+  \      'type': 'compile-errors',
-  \      "errors": [
+  \      'errors': [
   \        {
-  \          "path": "src/Module.elm",
+  \          'path': 'src/Module.elm',
-  \          "problems": [
+  \          'problems': [
   \            {
-  \              "title": "TYPE MISMATCH",
+  \              'title': 'TYPE MISMATCH',
-  \              "message": ["error details\n\n", { "string": "styled details" }],
+  \              'message': ["error details\n\n", { 'string': 'styled details' }],
-  \              "region": { "start": { "line": 404, "column": 1 }, "end": { "line": 408, "column": 18 } }
+  \              'region': { 'start': { 'line': 404, 'column': 1 }, 'end': { 'line': 408, 'column': 18 } }
   \            }
   \          ]
   \        }
   \      ]
-  \    }'
+  \    }),
   \ ])
 
 
@@ -182,45 +179,45 @@ Execute(The elm-make handler should parse Elm 0.18 compilation errors correctly)
   \   },
   \ ],
   \ ale_linters#elm#make#Handle(347, [
-  \   '[
+  \   json_encode([
   \      {
-  \         "tag": "unused import",
+  \         'tag': 'unused import',
-  \         "overview": "warning overview",
+  \         'overview': 'warning overview',
-  \         "details": "warning details",
+  \         'details': 'warning details',
-  \         "region": {"start": { "line": 33, "column": 1 }, "end": { "line": 33, "column": 19 } },
+  \         'region': {'start': { 'line': 33, 'column': 1 }, 'end': { 'line': 33, 'column': 19 } },
-  \         "type": "warning",
+  \         'type': 'warning',
-  \         "file": "' . b:tmp . '/Module.elm"
+  \         'file': ale#util#Tempname() . '/Module.elm',
   \      }
-  \    ]',
+  \    ]),
-  \   '[
+  \   json_encode([
   \      {
-  \        "tag": "TYPE MISMATCH",
+  \        'tag': 'TYPE MISMATCH',
-  \        "overview": "error overview 1",
+  \        'overview': 'error overview 1',
-  \        "subregion": { "start": { "line": 406, "column": 5 }, "end": { "line": 408, "column": 18 } },
+  \        'subregion': { 'start': { 'line': 406, 'column': 5 }, 'end': { 'line': 408, 'column': 18 } },
-  \        "details": "error details 1",
+  \        'details': 'error details 1',
-  \        "region": { "start": { "line": 404, "column": 1 }, "end": { "line": 408, "column": 18 } },
+  \        'region': { 'start': { 'line': 404, 'column': 1 }, 'end': { 'line': 408, 'column': 18 } },
-  \        "type": "error",
+  \        'type': 'error',
-  \        "file":"' . b:tmp . '/Module.elm"
+  \        'file': ale#util#Tempname() . '/Module.elm',
   \      },
   \      {
-  \        "tag": "TYPE MISMATCH",
+  \        'tag': 'TYPE MISMATCH',
-  \        "overview": "error overview 2",
+  \        'overview': 'error overview 2',
-  \        "subregion": { "start": { "line": 407, "column": 12 }, "end": { "line": 407, "column": 17 } },
+  \        'subregion': { 'start': { 'line': 407, 'column': 12 }, 'end': { 'line': 407, 'column': 17 } },
-  \        "details": "error details 2",
+  \        'details': 'error details 2',
-  \        "region": { "start": { "line": 406, "column": 5}, "end": { "line": 407, "column": 17 } },
+  \        'region': { 'start': { 'line': 406, 'column': 5}, 'end': { 'line': 407, 'column': 17 } },
-  \        "type":"error",
+  \        'type':'error',
-  \        "file":"' . b:tmp . '/Module.elm"
+  \        'file': ale#util#Tempname() . '/Module.elm',
   \      },
   \      {
-  \        "tag": "TYPE MISMATCH",
+  \        'tag': 'TYPE MISMATCH',
-  \        "overview": "error overview 3",
+  \        'overview': 'error overview 3',
-  \        "subregion": { "start": { "line": 406, "column": 88 }, "end": { "line": 406, "column": 93 } },
+  \        'subregion': { 'start': { 'line': 406, 'column': 88 }, 'end': { 'line': 406, 'column': 93 } },
-  \        "details": "error details 3",
+  \        'details': 'error details 3',
-  \        "region": { "start": { "line": 406, "column": 5 }, "end": { "line": 406, "column": 93 } },
+  \        'region': { 'start': { 'line': 406, 'column': 5 }, 'end': { 'line': 406, 'column': 93 } },
-  \        "type":"error",
+  \        'type':'error',
-  \        "file":"' . b:tmp . '/Module.elm"
+  \        'file': ale#util#Tempname() . '/Module.elm',
   \      }
-  \    ]'
+  \    ]),
   \ ])
 
 Execute(The elm-make handler should handle errors in Elm 0.18 imported modules):
@@ -229,29 +226,29 @@ Execute(The elm-make handler should handle errors in Elm 0.18 imported modules):
   \   {
   \     'lnum': 1,
   \     'type': 'E',
-  \     'text': "src/Module.elm:33 - error overview",
+  \     'text': 'src/Module.elm:33 - error overview',
   \     'detail': "src/Module.elm:33 ----------\n\nerror overview\n\nerror details"
   \   }
   \ ],
   \ ale_linters#elm#make#Handle(347, [
-  \   '[
+  \   json_encode([
   \      {
-  \         "tag": "unused import",
+  \         'tag': 'unused import',
-  \         "overview": "warning overview",
+  \         'overview': 'warning overview',
-  \         "details": "warning details",
+  \         'details': 'warning details',
-  \         "region": {"start": { "line": 33, "column": 1 }, "end": { "line": 33, "column": 19 } },
+  \         'region': {'start': { 'line': 33, 'column': 1 }, 'end': { 'line': 33, 'column': 19 } },
-  \         "type": "warning",
+  \         'type': 'warning',
-  \         "file": "src/Module.elm"
+  \         'file': 'src/Module.elm',
   \      },
   \      {
-  \         "tag": "type error",
+  \         'tag': 'type error',
-  \         "overview": "error overview",
+  \         'overview': 'error overview',
-  \         "details": "error details",
+  \         'details': 'error details',
-  \         "region": {"start": { "line": 33, "column": 1 }, "end": { "line": 33, "column": 19 } },
+  \         'region': {'start': { 'line': 33, 'column': 1 }, 'end': { 'line': 33, 'column': 19 } },
-  \         "type": "error",
+  \         'type': 'error',
-  \         "file": "src/Module.elm"
+  \         'file': 'src/Module.elm',
   \      }
-  \    ]',
+  \    ]),
   \ ])
 
 " Generic
@@ -275,21 +272,21 @@ Execute(The elm-make handler should put an error on the first line if a line can
   \   },
   \ ],
   \ ale_linters#elm#make#Handle(347, [
-  \   '{
+  \   json_encode({
-  \      "type": "compile-errors",
+  \      'type': 'compile-errors',
-  \      "errors": [
+  \      'errors': [
   \        {
-  \          "path": "' . b:tmp . '/Module.elm",
+  \          'path': ale#util#Tempname() . '/Module.elm',
-  \          "problems": [
+  \          'problems': [
   \            {
-  \              "title": "TYPE MISMATCH",
+  \              'title': 'TYPE MISMATCH',
-  \              "message": ["error details 1\n\n", { "string": "styled details" }],
+  \              'message': ["error details 1\n\n", { 'string': 'styled details' }],
-  \              "region": { "start": { "line": 404, "column": 1 }, "end": { "line": 408, "column": 18 } }
+  \              'region': { 'start': { 'line': 404, 'column': 1 }, 'end': { 'line': 408, 'column': 18 } }
   \            }
   \          ]
   \        }
   \      ]
-  \    }',
+  \    }),
   \    'Not JSON',
   \    'Also not JSON',
   \ ])

test/lsp/test_lsp_error_parsing.vader

@@ -63,3 +63,12 @@ Execute(Messages with tracebacks should be handled):
   \   },
   \ },
   \})
+
+Execute(Messages with string data should be handled):
+  AssertEqual "xyz\nUncaught Exception", ale#lsp#response#GetErrorMessage({
+  \ 'error': {
+  \   'code': -32602,
+  \   'message': 'xyz',
+  \   'data': 'Uncaught Exception',
+  \ },
+  \})

test/script/custom-linting-rules

@@ -87,6 +87,7 @@ check_errors $'\t' 'Use four spaces, not tabs'
 check_errors 'let g:ale_\w\+_\w\+_args =' 'Name your option g:ale_<filetype>_<lintername>_options instead'
 check_errors 'shellescape(' 'Use ale#Escape instead of shellescape'
 check_errors 'simplify(' 'Use ale#path#Simplify instead of simplify'
+check_errors 'tempname(' 'Use ale#util#Tempname instead of tempname'
 check_errors "expand(['\"]%" "Use expand('#' . a:buffer . '...') instead. You might get a filename for the wrong buffer."
 check_errors 'getcwd()' "Do not use getcwd(), as it could run from the wrong buffer. Use expand('#' . a:buffer . ':p:h') instead."
 check_errors '==#' "Use 'is#' instead of '==#'. 0 ==# 'foobar' is true"

test/sign/test_sign_column_highlighting.vader

@@ -1,12 +1,13 @@
 Before:
   Save g:ale_change_sign_column_color
+  Save &verbose
 
   function! ParseHighlight(name) abort
     redir => l:output
       silent execute 'highlight ' . a:name
     redir end
 
-    return join(split(l:output)[2:])
+    return substitute(join(split(l:output)[2:]), ' Last set.*', '', '')
   endfunction
 
   function! SetHighlight(name, syntax) abort
@@ -53,3 +54,15 @@ Execute(The SignColumn highlight should be set and reset):
 
   call ale#sign#SetSigns(bufnr(''), [])
   AssertEqual 'links to ALESignColumnWithoutErrors', ParseHighlight('SignColumn')
+
+Execute(The SignColumn should be correctly parsed when verbose=1):
+  set verbose=1
+  highlight SignColumn ctermfg=246 ctermbg=7 guifg=#839496 guibg=Grey
+
+  call ale#sign#SetUpDefaultColumnWithoutErrorsHighlight()
+
+  AssertEqual
+  \ has('nvim')
+  \   ? 'ctermfg=246 ctermbg=7 guifg=#839496 guibg=Grey'
+  \   : 'term=standout ctermfg=246 ctermbg=7 guifg=#839496 guibg=Grey',
+  \ ParseHighlight('ALESignColumnWithoutErrors')

test/test_tmpdir_init.vader

@@ -1,4 +0,0 @@
-Execute($TMPDIR should be set to a default value if unset):
-  if has('unix')
-    AssertEqual '/tmp', $TMPDIR
-  endif

test/test_tmpdir_wrapper.vader

@@ -0,0 +1,32 @@
+Before:
+  let g:exists = exists('$TMPDIR')
+  let g:old_value = $TMPDIR
+
+After:
+  if g:exists
+    let $TMPDIR = g:old_value
+  else
+    silent! unlet! $TMPDIR
+  endif
+
+  unlet! g:exists
+  unlet! g:old_value
+
+Execute(ale#util#Tempname shouldn't set $TMPDIR to an empty string if it isn't set):
+  " You can't run this test twice on old Vim versions.
+  if has('unix')
+    Assert ale#util#Tempname() =~# '^/tmp'
+    Assert !exists('$TMPDIR'), '$TMPDIR exists where it shouldn''t'
+  endif
+
+Execute(ale#util#Tempname shouldn't replace $TMPDIR and reset them to an empty string.):
+  if has('unix')
+    let $TMPDIR = ''
+    Assert ale#util#Tempname() =~# '^/tmp'
+
+    if !has('nvim')
+      Assert exists('$TMPDIR'), '$TMPDIR doesn''t exist where it should'
+    endif
+
+    AssertEqual '', $TMPDIR
+  endif

test/vimrc

@@ -35,7 +35,3 @@ set ttimeoutlen=0
 execute 'set encoding=utf-8'
 
 let g:mapleader=','
-
-" Clear the TMPDIR value for tests.
-" The plugin should set this to /tmp by default, which we will test.
-let $TMPDIR = ''