Add support for showing Info severities in echoed messages

autoload/ale/cursor.vim

@@ -7,12 +7,16 @@ let s:last_pos = [0, 0, 0]
 " Return a formatted message according to g:ale_echo_msg_format variable
 function! s:GetMessage(linter, type, text) abort
     let l:msg = g:ale_echo_msg_format
-    let l:type = a:type is# 'E'
-    \   ? g:ale_echo_msg_error_str
-    \   : g:ale_echo_msg_warning_str
+    let l:severity = g:ale_echo_msg_warning_str
+
+    if a:type is# 'E'
+        let l:severity = g:ale_echo_msg_error_str
+    elseif a:type is# 'I'
+        let l:severity = g:ale_echo_msg_info_str
+    endif
 
     " Replace handlers if they exist
-    for [l:k, l:v] in items({'linter': a:linter, 'severity': l:type})
+    for [l:k, l:v] in items({'linter': a:linter, 'severity': l:severity})
         let l:msg = substitute(l:msg, '\V%' . l:k . '%', l:v, '')
     endfor
 

doc/ale.txt

@@ -660,6 +660,14 @@ g:ale_echo_msg_format                                   *g:ale_echo_msg_format*
   |g:ale_echo_cursor| needs to be set to 1 for messages to be displayed.
 
 
+g:ale_echo_msg_info_str                               *g:ale_echo_msg_info_str*
+
+  Type: |String|
+  Default: `'Info'`
+
+  The string used for `%severity%` for info. See |g:ale_echo_msg_format|
+
+
 g:ale_echo_msg_warning_str                         *g:ale_echo_msg_warning_str*
 
   Type: |String|

plugin/ale.vim

@@ -155,6 +155,7 @@ let g:ale_echo_msg_format = get(g:, 'ale_echo_msg_format', '%s')
 
 " Strings used for severity in the echoed message
 let g:ale_echo_msg_error_str = get(g:, 'ale_echo_msg_error_str', 'Error')
+let g:ale_echo_msg_info_str = get(g:, 'ale_echo_msg_info_str', 'Info')
 let g:ale_echo_msg_warning_str = get(g:, 'ale_echo_msg_warning_str', 'Warning')
 
 " This flag can be set to 0 to disable echoing when the cursor moves.

test/test_cursor_warnings.vader

@@ -1,4 +1,6 @@
 Before:
+  Save g:ale_echo_msg_format
+
   let g:ale_buffer_info = {
   \ bufnr('%'): {
   \   'loclist': [
@@ -14,6 +16,16 @@ Before:
   \       'detail': "Every statement should end with a semicolon\nsecond line"
   \     },
   \     {
+  \       'lnum': 1,
+  \       'col': 14,
+  \       'bufnr': bufnr('%'),
+  \       'vcol': 0,
+  \       'linter_name': 'eslint',
+  \       'nr': -1,
+  \       'type': 'I',
+  \       'text': 'Some information',
+  \     },
+  \     {
   \       'lnum': 2,
   \       'col': 10,
   \       'bufnr': bufnr('%'),
@@ -63,6 +75,8 @@ Before:
   endfunction
 
 After:
+  Restore
+
   call cursor(1, 1)
 
   let g:ale_set_loclist = 1
@@ -81,7 +95,7 @@ After:
   echomsg ''
 
 Given javascript(A Javscript file with warnings/errors):
-  var x = 3
+  var x = 3 + 12345678
   var x = 5*2 + parseInt("10");
   // comment
 
@@ -141,3 +155,33 @@ Execute(ALEDetail should not capitlise cursor messages):
   call ale#cursor#EchoCursorWarning()
 
   AssertEqual 'lowercase error', GetLastMessage()
+
+Execute(The linter name should be formatted into the message correctly):
+  let g:ale_echo_msg_format = '%linter%: %s'
+
+  call cursor(2, 9)
+  call ale#cursor#EchoCursorWarning()
+
+  AssertEqual
+  \ 'eslint: Infix operators must be spaced. (space-infix-ops)',
+  \ GetLastMessage()
+
+Execute(The severity should be formatted into the message correctly):
+  let g:ale_echo_msg_format = '%severity%: %s'
+
+  call cursor(2, 9)
+  call ale#cursor#EchoCursorWarning()
+
+  AssertEqual
+  \ 'Warning: Infix operators must be spaced. (space-infix-ops)',
+  \ GetLastMessage()
+
+  call cursor(1, 10)
+  call ale#cursor#EchoCursorWarning()
+
+  AssertEqual 'Error: Missing semicolon. (semi)', GetLastMessage()
+
+  call cursor(1, 14)
+  call ale#cursor#EchoCursorWarning()
+
+  AssertEqual 'Info: Some information', GetLastMessage()