From 8fd23f4b716a36a0a4b56ae34f6e6a4ab8979045 Mon Sep 17 00:00:00 2001
From: Jon Parise <jon@indelible.org>
Date: Sat, 4 Sep 2021 18:07:53 -0700
Subject: Introduce an ALELSPStarted autocommand (#3878)

This User autocommand is trigged immediately after an LSP process is
successfully initialized. This provides a way to perform any additional
initialization work, such as setting up buffer-level mappings.
---
 autoload/ale/lsp_linter.vim | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

(limited to 'autoload')

diff --git a/autoload/ale/lsp_linter.vim b/autoload/ale/lsp_linter.vim
index b8885f31..ad181912 100644
--- a/autoload/ale/lsp_linter.vim
+++ b/autoload/ale/lsp_linter.vim
@@ -271,6 +271,30 @@ function! ale#lsp_linter#OnInit(linter, details, Callback) abort
         call ale#lsp#NotifyForChanges(l:conn_id, l:buffer)
     endif
 
+    " Tell the relevant buffer that the LSP has started via an autocmd.
+    if l:buffer > 0
+        if l:buffer == bufnr('')
+            silent doautocmd <nomodeline> User ALELSPStarted
+        else
+            execute 'augroup ALELSPStartedGroup' . l:buffer
+                autocmd!
+
+                execute printf(
+                \   'autocmd BufEnter <buffer=%d>'
+                \       . ' doautocmd <nomodeline> User ALELSPStarted',
+                \   l:buffer
+                \)
+
+                " Replicate ++once behavior for backwards compatibility.
+                execute printf(
+                \   'autocmd BufEnter <buffer=%d>'
+                \       . ' autocmd! ALELSPStartedGroup%d',
+                \   l:buffer, l:buffer
+                \)
+            augroup END
+        endif
+    endif
+
     call a:Callback(a:linter, a:details)
 endfunction
 
-- 
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