Add support for nimlsp (dense-analysis#2815)

* Add support for nimlsp.vim
* Add test and docs for nimlsp
* Add nimlsp to supported-tools.md
* Add nimlsp to doc/ale-supported-languages-and-tools.txt

ale_linters/nim/nimlsp.vim

@@ -0,0 +1,33 @@
+" Author: jeremija <https://github.com/jeremija>
+" Description: Support for nimlsp (language server for nim)
+
+call ale#Set('nim_nimlsp_nim_sources', '')
+
+function! ale_linters#nim#nimlsp#GetProjectRoot(buffer) abort
+    let l:project_root = ale#path#FindNearestDirectory(a:buffer, '.git')
+
+    if !empty(l:project_root)
+        return fnamemodify(l:project_root, ':h:h')
+    endif
+
+    return ''
+endfunction
+
+function! ale_linters#nim#nimlsp#GetCommand(buffer) abort
+    let l:nim_sources = ale#Var(a:buffer, 'nim_nimlsp_nim_sources')
+
+    if !empty(l:nim_sources)
+        let l:nim_sources = ale#Escape(l:nim_sources)
+    endif
+
+    return '%e' . ale#Pad(l:nim_sources)
+endfunction
+
+call ale#linter#Define('nim', {
+\   'name': 'nimlsp',
+\   'lsp': 'stdio',
+\   'executable': 'nimlsp',
+\   'command': function('ale_linters#nim#nimlsp#GetCommand'),
+\   'language': 'nim',
+\   'project_root': function('ale_linters#nim#nimlsp#GetProjectRoot'),
+\})

doc/ale-nim.txt

@@ -0,0 +1,25 @@
+===============================================================================
+ALE Nim Integration                                           *ale-nim-options*
+
+
+===============================================================================
+nimcheck                                                     *ale-nim-nimcheck*
+
+  ALE does not provide additional configuration options for `nimcheck` at this
+  point.
+
+
+===============================================================================
+nimlsp                                                         *ale-nim-nimlsp*
+
+g:nim_nimlsp_nim_sources                             *g:nim_nimlsp_nim_sources*
+
+  Type: |String|
+  Default: `''`
+
+  Sets the path to Nim source repository as the first argument to `nimlsp`
+  command.
+
+
+===============================================================================
+  vim:tw=78:ts=2:sts=2:sw=2:ft=help:norl:

doc/ale-supported-languages-and-tools.txt

@@ -283,6 +283,7 @@ Notes:
   * `nasm`!!
 * Nim
   * `nim check`!!
+  * `nimlsp`
 * nix
   * `nix-instantiate`
   * `nixpkgs-fmt`

doc/ale.txt

@@ -2308,6 +2308,9 @@ documented in additional help files.
     mmc...................................|ale-mercury-mmc|
   nasm....................................|ale-nasm-options|
     nasm..................................|ale-nasm-nasm|
+  nim.....................................|ale-nim-options|
+    nimcheck..............................|ale-nim-nimcheck|
+    nimlsp................................|ale-nim-nimlsp|
   nix.....................................|ale-nix-options|
     nixpkgs-fmt...........................|ale-nix-nixpkgs-fmt|
   nroff...................................|ale-nroff-options|

supported-tools.md

@@ -292,6 +292,7 @@ formatting.
   * [nasm](https://www.nasm.us/) :floppy_disk:
 * Nim
   * [nim check](https://nim-lang.org/docs/nimc.html) :floppy_disk:
+  * [nimlsp](https://github.com/PMunch/nimlsp)
 * nix
   * [nix-instantiate](http://nixos.org/nix/manual/#sec-nix-instantiate)
   * [nixpkgs-fmt](https://github.com/nix-community/nixpkgs-fmt)

test/command_callback/test_nimlsp_command_callback.vader

@@ -0,0 +1,12 @@
+Before:
+  call ale#assert#SetUpLinterTest('nim', 'nimlsp')
+
+After:
+  call ale#assert#TearDownLinterTest()
+
+Execute(It does not set nim sources by default):
+  AssertLinter 'nimlsp', ale#Escape('nimlsp')
+
+Execute(Sets nimlsp and escapes sources from g:ale_nim_nimlsp_nim_sources):
+  let g:ale_nim_nimlsp_nim_sources = '/path/to /Nim'
+  AssertLinter 'nimlsp', ale#Escape('nimlsp') . ' ' . ale#Escape('/path/to /Nim')

test/test_nimlsp_project_root.vader

@@ -0,0 +1,19 @@
+Before:
+  runtime ale_linters/nim/nimlsp.vim
+  call ale#test#SetDirectory('/testplugin/test')
+
+After:
+  if isdirectory(g:dir . '/.git')
+    call delete(g:dir . '/.git', 'd')
+  endif
+
+  call ale#test#RestoreDirectory()
+  call ale#linter#Reset()
+
+
+Execute(Detect root of nim project with .git/ correctly):
+  call ale#test#SetFilename('nim-test-files/with-git/src/source.nim')
+  call mkdir(g:dir . '/.git')
+  AssertEqual
+  \ ale#path#Simplify(g:dir),
+  \ ale_linters#nim#nimlsp#GetProjectRoot(bufnr(''))