sh: add bash-language-server linter

4 files changed, 55 insertions, 2 deletions

diff --git a/README.md b/README.md
index 016ed783..8b833b40 100644
--- a/README.md
+++ b/README.md
@@ -94,7 +94,7 @@ formatting.
 | API Blueprint | [drafter](https://github.com/apiaryio/drafter) |
 | AsciiDoc | [alex](https://github.com/wooorm/alex) !!, [proselint](http://proselint.com/), [redpen](http://redpen.cc/), [write-good](https://github.com/btford/write-good) |
 | Awk | [gawk](https://www.gnu.org/software/gawk/)|
-| Bash | shell [-n flag](https://www.gnu.org/software/bash/manual/bash.html#index-set), [shellcheck](https://www.shellcheck.net/), [shfmt](https://github.com/mvdan/sh) |
+| Bash | [language-server](https://github.com/mads-hartmann/bash-language-server), shell [-n flag](https://www.gnu.org/software/bash/manual/bash.html#index-set), [shellcheck](https://www.shellcheck.net/), [shfmt](https://github.com/mvdan/sh) |
 | Bourne Shell | shell [-n flag](http://linux.die.net/man/1/sh), [shellcheck](https://www.shellcheck.net/), [shfmt](https://github.com/mvdan/sh) |
 | C | [cppcheck](http://cppcheck.sourceforge.net), [cpplint](https://github.com/google/styleguide/tree/gh-pages/cpplint), [clang](http://clang.llvm.org/), [clangtidy](http://clang.llvm.org/extra/clang-tidy/) !!, [clang-format](https://clang.llvm.org/docs/ClangFormat.html), [flawfinder](https://www.dwheeler.com/flawfinder/), [gcc](https://gcc.gnu.org/) |
 | C++ (filetype cpp) | [clang](http://clang.llvm.org/), [clangcheck](http://clang.llvm.org/docs/ClangCheck.html) !!, [clangtidy](http://clang.llvm.org/extra/clang-tidy/) !!, [clang-format](https://clang.llvm.org/docs/ClangFormat.html), [cppcheck](http://cppcheck.sourceforge.net), [cpplint](https://github.com/google/styleguide/tree/gh-pages/cpplint) !!, [cquery](https://github.com/cquery-project/cquery), [flawfinder](https://www.dwheeler.com/flawfinder/), [gcc](https://gcc.gnu.org/) |
diff --git a/ale_linters/sh/language_server.vim b/ale_linters/sh/language_server.vim
new file mode 100644
index 00000000..2f66e27b
--- /dev/null
+++ b/ale_linters/sh/language_server.vim
@@ -0,0 +1,33 @@
+" Author: Christian Höltje (https://docwhat.org/)
+" Description: BASH Language server integration for ALE
+scriptencoding utf-8
+
+call ale#Set('sh_language_server_executable', 'bash-language-server')
+call ale#Set('sh_language_server_use_global', get(g:, 'ale_use_global_executables', 0))
+
+function! ale_linters#sh#language_server#GetExecutable(buffer) abort
+    return ale#node#FindExecutable(a:buffer, 'sh_language_server', [
+    \   'node_modules/.bin/bash-language-server',
+    \])
+endfunction
+
+function! ale_linters#sh#language_server#GetCommand(buffer) abort
+    let l:exe = ale#Escape(ale_linters#sh#language_server#GetExecutable(a:buffer))
+
+    return l:exe . ' start'
+endfunction
+
+function! ale_linters#sh#language_server#GetProjectRoot(buffer) abort
+    let l:git_path = ale#path#FindNearestDirectory(a:buffer, '.git')
+
+    return !empty(l:git_path) ? fnamemodify(l:git_path, ':h:h') : ''
+endfunction
+
+call ale#linter#Define('sh', {
+\   'name': 'language_server',
+\   'lsp': 'stdio',
+\   'executable_callback': 'ale_linters#sh#language_server#GetExecutable',
+\   'command_callback': 'ale_linters#sh#language_server#GetCommand',
+\   'language': 'sh',
+\   'project_root_callback': 'ale_linters#sh#language_server#GetProjectRoot',
+\})
diff --git a/doc/ale-sh.txt b/doc/ale-sh.txt
index 941dc59b..7557e522 100644
--- a/doc/ale-sh.txt
+++ b/doc/ale-sh.txt
@@ -3,6 +3,25 @@ ALE Shell Integration                                          *ale-sh-options*
 
 
 ===============================================================================
+sh-language-server                                     *ale-sh-language-server*
+
+g:ale_sh_language_server_executable        *g:ale_sh_language_server_executable*
+                                           *b:ale_sh_language_server_executable*
+  Type: |String|
+  Default: `'bash-language-server'`
+
+  See |ale-integrations-local-executables|
+
+
+g:ale_sh_language_server_use_global        *g:ale_sh_language_server_use_global*
+                                           *b:ale_sh_language_server_use_global*
+  Type: |Number|
+  Default: `get(g:, 'ale_use_global_executables', 0)`
+
+  See |ale-integrations-local-executables|
+
+
+===============================================================================
 shell                                                            *ale-sh-shell*
 
 g:ale_sh_shell_default_shell                     *g:ale_sh_shell_default_shell*
diff --git a/doc/ale.txt b/doc/ale.txt
index 2f91c6d1..6c0b3ccf 100644
--- a/doc/ale.txt
+++ b/doc/ale.txt
@@ -228,6 +228,7 @@ CONTENTS                                                         *ale-contents*
       prettier............................|ale-scss-prettier|
       stylelint...........................|ale-scss-stylelint|
     sh....................................|ale-sh-options|
+      sh-language-server..................|ale-sh-language-server|
       shell...............................|ale-sh-shell|
       shellcheck..........................|ale-sh-shellcheck|
       shfmt...............................|ale-sh-shfmt|
@@ -319,7 +320,7 @@ Notes:
 * API Blueprint: `drafter`
 * AsciiDoc: `alex`!!, `proselint`, `redpen`, `write-good`
 * Awk: `gawk`
-* Bash: `shell` (-n flag), `shellcheck`, `shfmt`
+* Bash: `language-server`, `shell` (-n flag), `shellcheck`, `shfmt`
 * Bourne Shell: `shell` (-n flag), `shellcheck`, `shfmt`
 * C: `cppcheck`, `cpplint`!!, `clang`, `clangtidy`!!, `clang-format`, `flawfinder`, `gcc`
 * C++ (filetype cpp): `clang`, `clangcheck`!!, `clangtidy`!!, `clang-format`, `cppcheck`, `cpplint`!!, `cquery`, `flawfinder`, `gcc`