Fix #876 - Save history in a separate buffer variable so history works when linting is disabled

autoload/ale/debugging.vim

@@ -112,11 +112,7 @@ endfunction
 function! s:EchoCommandHistory() abort
     let l:buffer = bufnr('%')
 
-    if !has_key(g:ale_buffer_info, l:buffer)
-        return
-    endif
-
-    for l:item in g:ale_buffer_info[l:buffer].history
+    for l:item in ale#history#Get(l:buffer)
         if l:item.job_id is# 'executable'
             call s:EchoExecutable(l:item)
         else

autoload/ale/engine.vim

@@ -53,14 +53,12 @@ function! ale#engine#InitBufferInfo(buffer) abort
         " loclist holds the loclist items after all jobs have completed.
         " temporary_file_list holds temporary files to be cleaned up
         " temporary_directory_list holds temporary directories to be cleaned up
-        " history holds a list of previously run commands for this buffer
         let g:ale_buffer_info[a:buffer] = {
         \   'job_list': [],
         \   'active_linter_list': [],
         \   'loclist': [],
         \   'temporary_file_list': [],
         \   'temporary_directory_list': [],
-        \   'history': [],
         \}
 
         return 1
@@ -557,8 +555,6 @@ function! s:RunJob(options) abort
 
     if g:ale_history_enabled
         call ale#history#Add(l:buffer, l:status, l:job_id, l:command)
-    else
-        let l:info.history = []
     endif
 
     if get(g:, 'ale_run_synchronously') == 1

autoload/ale/history.vim

@@ -1,15 +1,20 @@
 " Author: w0rp <devw0rp@gmail.com>
 " Description: Tools for managing command history
-"
+
+" Return a shallow copy of the command history for a given buffer number.
+function! ale#history#Get(buffer) abort
+    return copy(getbufvar(a:buffer, 'ale_history', []))
+endfunction
+
 function! ale#history#Add(buffer, status, job_id, command) abort
     if g:ale_max_buffer_history_size <= 0
         " Don't save anything if the history isn't a positive number.
-        let g:ale_buffer_info[a:buffer].history = []
+        call setbufvar(a:buffer, 'ale_history', [])
 
         return
     endif
 
-    let l:history = g:ale_buffer_info[a:buffer].history
+    let l:history = getbufvar(a:buffer, 'ale_history', [])
 
     " Remove the first item if we hit the max history size.
     if len(l:history) >= g:ale_max_buffer_history_size
@@ -22,18 +27,13 @@ function! ale#history#Add(buffer, status, job_id, command) abort
     \   'command': a:command,
     \})
 
-    let g:ale_buffer_info[a:buffer].history = l:history
+    call setbufvar(a:buffer, 'ale_history', l:history)
 endfunction
 
 function! s:FindHistoryItem(buffer, job_id) abort
-    " Stop immediately if there's nothing set up for the buffer.
-    if !has_key(g:ale_buffer_info, a:buffer)
-        return {}
-    endif
-
     " Search backwards to find a matching job ID. IDs might be recycled,
     " so finding the last one should be good enough.
-    for l:obj in reverse(g:ale_buffer_info[a:buffer].history[:])
+    for l:obj in reverse(ale#history#Get(a:buffer))
         if l:obj.job_id == a:job_id
             return l:obj
         endif
@@ -46,18 +46,14 @@ endfunction
 function! ale#history#SetExitCode(buffer, job_id, exit_code) abort
     let l:obj = s:FindHistoryItem(a:buffer, a:job_id)
 
-    if !empty(l:obj)
-        " If we find a match, then set the code and status.
-        let l:obj.exit_code = a:exit_code
-        let l:obj.status = 'finished'
-    endif
+    " If we find a match, then set the code and status.
+    let l:obj.exit_code = a:exit_code
+    let l:obj.status = 'finished'
 endfunction
 
 " Set the output for a command which finished.
 function! ale#history#RememberOutput(buffer, job_id, output) abort
     let l:obj = s:FindHistoryItem(a:buffer, a:job_id)
 
-    if !empty(l:obj)
-        let l:obj.output = a:output
-    endif
+    let l:obj.output = a:output
 endfunction