Add support for ink-language-server

This commit add support for ink-language-server, which it does by
largely copying and pasting from the pure-language-server PR that was
merged recently.

The most interesting things to note are:
- ink-language-server is distributed upstream via npm, which is why we
  search through node_modules
- With some coaxing, it can be installed globally - which is why we
  search for a global binary.
- Ink is a funky language, and users will likely need to add
  initialization options.
- I am not incredibly familiar with vimscript; and I may not have done
  some of the buffer searching correctly.

1 files changed, 35 insertions, 0 deletions

diff --git a/ale_linters/ink/ls.vim b/ale_linters/ink/ls.vim
new file mode 100644
index 00000000..1cc93583
--- /dev/null
+++ b/ale_linters/ink/ls.vim
@@ -0,0 +1,35 @@
+" Author: Andreww Hayworth <ahayworth@gmail.com>
+" Description: Integrate ALE with ink-language-server
+
+call ale#Set('ink_ls_executable', 'ink-language-server')
+call ale#Set('ink_ls_use_global', get(g:, 'ale_use_global_executables', 0))
+call ale#Set('ink_ls_initialization_options', {})
+
+function! ale_linters#ink#ls#GetExecutable(buffer) abort
+    return ale#node#FindExecutable(a:buffer, 'ink_ls', [
+    \   'ink-language-server',
+    \   'node_modules/.bin/ink-language-server',
+    \])
+endfunction
+
+function! ale_linters#ink#ls#GetCommand(buffer) abort
+    let l:executable = ale_linters#ink#ls#GetExecutable(a:buffer)
+
+    return ale#Escape(l:executable) . ' --stdio'
+endfunction
+
+function! ale_linters#ink#ls#FindProjectRoot(buffer) abort
+    let l:main_file = get(ale#Var(a:buffer, 'ink_ls_initialization_options'), 'mainStoryPath', 'main.ink')
+    let l:config = ale#path#ResolveLocalPath(a:buffer, l:main_file, expand('#' . a:buffer . ':p'))
+
+    return ale#path#Dirname(l:config)
+endfunction
+
+call ale#linter#Define('ink', {
+\   'name': 'ink-language-server',
+\   'lsp': 'stdio',
+\   'executable': function('ale_linters#ink#ls#GetExecutable'),
+\   'command': function('ale_linters#ink#ls#GetCommand'),
+\   'project_root': function('ale_linters#ink#ls#FindProjectRoot'),
+\   'initialization_options': {b -> ale#Var(b, 'ink_ls_initialization_options')},
+\})