Add vim-language-server linter support

1 files changed, 61 insertions, 0 deletions

diff --git a/ale_linters/vim/vimls.vim b/ale_linters/vim/vimls.vim
new file mode 100644
index 00000000..26014d66
--- /dev/null
+++ b/ale_linters/vim/vimls.vim
@@ -0,0 +1,61 @@
+" Author: Jeffrey Lau - https://github.com/zoonfafer
+" Description: Vim Language Server integration for ALE
+
+call ale#Set('vim_vimls_executable', 'vim-language-server')
+call ale#Set('vim_vimls_use_global', get(g:, 'ale_use_global_executables', 0))
+call ale#Set('vim_vimls_config', {})
+
+function! ale_linters#vim#vimls#GetProjectRoot(buffer) abort
+    let l:trigger_file_candidates = [
+    \   '.vimrc',
+    \   'init.vim',
+    \]
+
+    for l:candidate in l:trigger_file_candidates
+        let l:trigger_file = fnamemodify(bufname(a:buffer), ':t')
+
+        if l:trigger_file is# l:candidate
+            return fnamemodify(
+            \   bufname(a:buffer),
+            \   ':h',
+            \)
+        endif
+    endfor
+
+    let l:trigger_dir_candidates = [
+    \   'autoload',
+    \   'plugin',
+    \   '.git',
+    \]
+
+    let l:path_upwards = ale#path#Upwards(fnamemodify(bufname(a:buffer), ':p:h'))
+
+    for l:path in l:path_upwards
+        for l:candidate in l:trigger_dir_candidates
+            let l:trigger_dir = ale#path#Simplify(
+            \   l:path . '/' . l:candidate,
+            \)
+
+            if isdirectory(l:trigger_dir)
+                return fnamemodify(
+                \   l:trigger_dir,
+                \   ':p:h:h',
+                \)
+            endif
+        endfor
+    endfor
+
+    return ''
+endfunction
+
+call ale#linter#Define('vim', {
+\   'name': 'vimls',
+\   'lsp': 'stdio',
+\   'lsp_config': {b -> ale#Var(b, 'vim_vimls_config')},
+\   'executable': {b -> ale#node#FindExecutable(b, 'vim_vimls', [
+\       'node_modules/.bin/vim-language-server',
+\   ])},
+\   'command': '%e --stdio',
+\   'language': 'vim',
+\   'project_root': function('ale_linters#vim#vimls#GetProjectRoot'),
+\})