From d0e33022539863b2c55aca49c1d1a9852b50c91d Mon Sep 17 00:00:00 2001
From: David Hotham <david.hotham@metaswitch.com>
Date: Fri, 3 Aug 2018 20:59:32 +0100
Subject: [PATCH] Add support for yang-lsp

---
 README.md                                       |  1 +
 ale_linters/yang/yang_lsp.vim                   | 14 ++++++++++++++
 doc/ale-yang.txt                                | 17 +++++++++++++++++
 doc/ale.txt                                     |  3 +++
 .../test_yang_lsp_command_callbacks.vader       | 12 ++++++++++++
 5 files changed, 47 insertions(+)
 create mode 100644 ale_linters/yang/yang_lsp.vim
 create mode 100644 doc/ale-yang.txt
 create mode 100644 test/command_callback/test_yang_lsp_command_callbacks.vader

diff --git a/README.md b/README.md
index 210c4bfa..746b63d4 100644
--- a/README.md
+++ b/README.md
@@ -191,6 +191,7 @@ formatting.
 | XHTML | [alex](https://github.com/wooorm/alex) !!, [proselint](http://proselint.com/), [write-good](https://github.com/btford/write-good) |
 | XML | [xmllint](http://xmlsoft.org/xmllint.html) |
 | YAML | [swaglint](https://github.com/byCedric/swaglint), [yamllint](https://yamllint.readthedocs.io/) |
+| YANG | [yang-lsp](https://github.com/theia-ide/yang-lsp) |
 
 <a name="usage"></a>
 
diff --git a/ale_linters/yang/yang_lsp.vim b/ale_linters/yang/yang_lsp.vim
new file mode 100644
index 00000000..a60e9113
--- /dev/null
+++ b/ale_linters/yang/yang_lsp.vim
@@ -0,0 +1,14 @@
+call ale#Set('yang_lsp_executable', 'yang-language-server')
+
+function! ale_linters#yang#yang_lsp#GetProjectRoot(buffer) abort
+    let l:project_root = ale#path#FindNearestFile(a:buffer, 'yang.settings')
+    return !empty(l:project_root) ? fnamemodify(l:project_root, ':h') : ''
+endfunction
+
+call ale#linter#Define('yang', {
+\   'name': 'yang_lsp',
+\   'lsp': 'stdio',
+\   'executable_callback': ale#VarFunc('yang_lsp_executable'),
+\   'project_root_callback': 'ale_linters#yang#yang_lsp#GetProjectRoot',
+\   'command': '%e',
+\})
diff --git a/doc/ale-yang.txt b/doc/ale-yang.txt
new file mode 100644
index 00000000..ad619733
--- /dev/null
+++ b/doc/ale-yang.txt
@@ -0,0 +1,17 @@
+===============================================================================
+ALE YANG Integration                                         *ale-yang-options*
+
+
+===============================================================================
+yang-lsp                                                         *ale-yang-lsp*
+
+g:ale_yang_lsp_executable                           *g:ale_yang_lsp_executable*
+                                                    *b:ale_yang_lsp_executable*
+  Type: |String|
+  Default: `'yang-language-server'`
+
+  This variable can be changed to use a different executable for yang-lsp.
+
+
+===============================================================================
+  vim:tw=78:ts=2:sts=2:sw=2:ft=help:norl:
diff --git a/doc/ale.txt b/doc/ale.txt
index db060a2b..9698b59c 100644
--- a/doc/ale.txt
+++ b/doc/ale.txt
@@ -292,6 +292,8 @@ CONTENTS                                                         *ale-contents*
     yaml..................................|ale-yaml-options|
       swaglint............................|ale-yaml-swaglint|
       yamllint............................|ale-yaml-yamllint|
+    yang..................................|ale-yang-options|
+      yang-lsp............................|ale-yang-lsp|
   8. Commands/Keybinds....................|ale-commands|
   9. API..................................|ale-api|
   10. Special Thanks......................|ale-special-thanks|
@@ -435,6 +437,7 @@ Notes:
 * XHTML: `alex`!!, `proselint`, `write-good`
 * XML: `xmllint`
 * YAML: `swaglint`, `yamllint`
+* YANG: `yang-lsp`
 
 ===============================================================================
 3. Linting                                                           *ale-lint*
diff --git a/test/command_callback/test_yang_lsp_command_callbacks.vader b/test/command_callback/test_yang_lsp_command_callbacks.vader
new file mode 100644
index 00000000..5be7501f
--- /dev/null
+++ b/test/command_callback/test_yang_lsp_command_callbacks.vader
@@ -0,0 +1,12 @@
+Before:
+  call ale#assert#SetUpLinterTest('yang', 'yang_lsp')
+
+After:
+  call ale#assert#TearDownLinterTest()
+
+Execute(The executable should be configurable):
+  AssertLinter 'yang-language-server', ale#Escape('yang-language-server')
+
+  let b:ale_yang_lsp_executable = 'foobar'
+
+  AssertLinter 'foobar', ale#Escape('foobar')