+" Author: Drew Olson <drew@drewolson.org>
+" Description: Integrate ALE with purescript-language-server.
+
+call ale#Set('purescript_ls_executable', 'purescript-language-server')
+call ale#Set('purescript_ls_use_global', get(g:, 'ale_use_global_executables', 0))
+call ale#Set('purescript_ls_config', {})
+
+function! ale_linters#purescript#ls#GetExecutable(buffer) abort
+ return ale#path#FindExecutable(a:buffer, 'purescript_ls', [
+ \ 'node_modules/.bin/purescript-language-server',
+ \])
+endfunction
+
+function! ale_linters#purescript#ls#GetCommand(buffer) abort
+ let l:executable = ale_linters#purescript#ls#GetExecutable(a:buffer)
+
+ return ale#Escape(l:executable) . ' --stdio'
+endfunction
+
+function! ale_linters#purescript#ls#FindProjectRoot(buffer) abort
+ let l:config = ale#path#FindNearestFile(a:buffer, 'bower.json')
+
+ if !empty(l:config)
+ return fnamemodify(l:config, ':h')
+ endif
+
+ let l:config = ale#path#FindNearestFile(a:buffer, 'psc-package.json')
+
+ if !empty(l:config)
+ return fnamemodify(l:config, ':h')
+ endif
+
+ let l:config = ale#path#FindNearestFile(a:buffer, 'spago.dhall')
+
+ if !empty(l:config)
+ return fnamemodify(l:config, ':h')
+ endif
+
+ return ''
+endfunction
+
+call ale#linter#Define('purescript', {
+\ 'name': 'purescript-language-server',
+\ 'aliases': ['purescriptls'],
+\ 'lsp': 'stdio',
+\ 'executable': function('ale_linters#purescript#ls#GetExecutable'),
+\ 'command': function('ale_linters#purescript#ls#GetCommand'),
+\ 'project_root': function('ale_linters#purescript#ls#FindProjectRoot'),
+\ 'lsp_config': {b -> ale#Var(b, 'purescript_ls_config')},
+\})