I broke up with neovim....vim is my best friend now

dot_vim/plugged/ale/ale_linters/kotlin/languageserver.vim

@@ -0,0 +1,29 @@
+" Author: MTDL9 <https://github.com/MTDL9>
+" Description: Support for the Kotlin language server https://github.com/fwcd/KotlinLanguageServer
+
+call ale#Set('kotlin_languageserver_executable', 'kotlin-language-server')
+
+function! ale_linters#kotlin#languageserver#GetProjectRoot(buffer) abort
+    let l:gradle_root = ale#gradle#FindProjectRoot(a:buffer)
+
+    if !empty(l:gradle_root)
+        return l:gradle_root
+    endif
+
+    let l:maven_pom_file = ale#path#FindNearestFile(a:buffer, 'pom.xml')
+
+    if !empty(l:maven_pom_file)
+        return fnamemodify(l:maven_pom_file, ':h')
+    endif
+
+    return ''
+endfunction
+
+call ale#linter#Define('kotlin', {
+\   'name': 'languageserver',
+\   'lsp': 'stdio',
+\   'executable': {b -> ale#Var(b, 'kotlin_languageserver_executable')},
+\   'command': '%e',
+\   'language': 'kotlin',
+\   'project_root': function('ale_linters#kotlin#languageserver#GetProjectRoot'),
+\})