add support for svelte via svelteserver language server (#3644)

* add support for svelte via svelteserver language server
* svelte: fix Vint error and add a `svelteserver` simple test.

Co-authored-by: Joakim Repomaa <mail@j.repomaa.com>
Co-authored-by: Joakim Repomaa <mail@jreinert.com>

8 files changed, 73 insertions, 1 deletions

diff --git a/ale_linters/svelte/svelteserver.vim b/ale_linters/svelte/svelteserver.vim
new file mode 100644
index 00000000..bcd10be8
--- /dev/null
+++ b/ale_linters/svelte/svelteserver.vim
@@ -0,0 +1,21 @@
+" Author: Joakim Repomaa <joakim@repomaa.com>
+" Description: Svelte Language Server integration for ALE
+
+call ale#Set('svelte_svelteserver_executable', 'svelteserver')
+call ale#Set('svelte_svelteserver_use_global', get(g:, 'ale_use_global_executables', 0))
+
+function! ale_linters#svelte#svelteserver#GetProjectRoot(buffer) abort
+    let l:package_path = ale#path#FindNearestFile(a:buffer, 'package.json')
+
+    return !empty(l:package_path) ? fnamemodify(l:package_path, ':h') : ''
+endfunction
+
+call ale#linter#Define('svelte', {
+\   'name': 'svelteserver',
+\   'lsp': 'stdio',
+\   'executable': {b -> ale#node#FindExecutable(b, 'svelte_svelteserver', [
+\       'node_modules/.bin/svelteserver',
+\   ])},
+\   'command': '%e --stdio',
+\   'project_root': function('ale_linters#svelte#svelteserver#GetProjectRoot'),
+\})
diff --git a/autoload/ale/fix/registry.vim b/autoload/ale/fix/registry.vim
index bb26573b..d82e2778 100644
--- a/autoload/ale/fix/registry.vim
+++ b/autoload/ale/fix/registry.vim
@@ -112,7 +112,7 @@ let s:default_registry = {
 \   },
 \   'prettier': {
 \       'function': 'ale#fixers#prettier#Fix',
-\       'suggested_filetypes': ['javascript', 'typescript', 'css', 'less', 'scss', 'json', 'json5', 'graphql', 'markdown', 'vue', 'html', 'yaml', 'openapi', 'ruby'],
+\       'suggested_filetypes': ['javascript', 'typescript', 'css', 'less', 'scss', 'json', 'json5', 'graphql', 'markdown', 'vue', 'svelte', 'html', 'yaml', 'openapi', 'ruby'],
 \       'description': 'Apply prettier to a file.',
 \   },
 \   'prettier_eslint': {
diff --git a/autoload/ale/fixers/prettier.vim b/autoload/ale/fixers/prettier.vim
index 43806e8e..a080d880 100644
--- a/autoload/ale/fixers/prettier.vim
+++ b/autoload/ale/fixers/prettier.vim
@@ -74,6 +74,7 @@ function! ale#fixers#prettier#ApplyFixForVersion(buffer, version) abort
         \    'graphql': 'graphql',
         \    'markdown': 'markdown',
         \    'vue': 'vue',
+        \    'svelte': 'svelte',
         \    'yaml': 'yaml',
         \    'openapi': 'yaml',
         \    'html': 'html',
diff --git a/doc/ale-supported-languages-and-tools.txt b/doc/ale-supported-languages-and-tools.txt
index 26e91e5c..fde158fe 100644
--- a/doc/ale-supported-languages-and-tools.txt
+++ b/doc/ale-supported-languages-and-tools.txt
@@ -489,6 +489,9 @@ Notes:
   * `stylelint`
 * SugarSS
   * `stylelint`
+* Svelte
+  * `prettier`
+  * `svelteserver`
 * Swift
   * Apple `swift-format`
   * `sourcekit-lsp`
diff --git a/doc/ale-svelte.txt b/doc/ale-svelte.txt
new file mode 100644
index 00000000..92f109f7
--- /dev/null
+++ b/doc/ale-svelte.txt
@@ -0,0 +1,31 @@
+===============================================================================
+ALE Svelte Integration                                     *ale-svelte-options*
+
+
+===============================================================================
+prettier                                                  *ale-svelte-prettier*
+
+See |ale-javascript-prettier| for information about the available options.
+
+
+===============================================================================
+svelteserver                                          *ale-svelte-svelteserver*
+
+g:ale_svelte_svelteserver_executable     *g:ale_svelte_svelteserver_executable*
+                                         *b:ale_svelte_svelteserver_executable*
+  Type: |String|
+  Default: `'svelteserver'`
+
+  See |ale-integrations-local-executables|
+
+
+g:ale_svelte_svelteserver_use_global      *g:ale_svelte_svelteserver_use_global*
+                                          *b:ale_svelte_svelteserver_use_global*
+  Type: |Number|
+  Default: `get(g:, 'ale_use_global_executables', 0)`
+
+  See |ale-integrations-local-executables|
+
+
+===============================================================================
+  vim:tw=78:ts=2:sts=2:sw=2:ft=help:norl:
diff --git a/doc/ale.txt b/doc/ale.txt
index 63086611..cb11226d 100644
--- a/doc/ale.txt
+++ b/doc/ale.txt
@@ -1438,6 +1438,7 @@ g:ale_linter_aliases                                     *g:ale_linter_aliases*
   \   'ps1': 'powershell',
   \   'rmarkdown': 'r',
   \   'rmd': 'r',
+  \   'svelte': ['svelte', 'javascript'],
   \   'systemverilog': 'verilog',
   \   'typescriptreact': ['typescript', 'tsx'],
   \   'verilog_systemverilog': ['verilog_systemverilog', 'verilog'],
@@ -1588,6 +1589,7 @@ g:ale_linters                                                   *g:ale_linters*
   \   'python': ['flake8', 'mypy', 'pylint', 'pyright'],
   \   'rust': ['cargo', 'rls'],
   \   'spec': [],
+  \   'svelte': ['eslint', 'svelteserver'],
   \   'text': [],
   \   'vue': ['eslint', 'vls'],
   \   'zsh': ['shell'],
@@ -3010,6 +3012,9 @@ documented in additional help files.
     stylelint.............................|ale-stylus-stylelint|
   sugarss.................................|ale-sugarss-options|
     stylelint.............................|ale-sugarss-stylelint|
+  svelte..................................|ale-svelte-options|
+    prettier..............................|ale-svelte-prettier|
+    svelteserver..........................|ale-svelte-svelteserver|
   swift...................................|ale-swift-options|
     sourcekitlsp..........................|ale-swift-sourcekitlsp|
   systemd.................................|ale-systemd-options|
diff --git a/supported-tools.md b/supported-tools.md
index 4c65a324..1bcbe686 100644
--- a/supported-tools.md
+++ b/supported-tools.md
@@ -498,6 +498,9 @@ formatting.
   * [stylelint](https://github.com/stylelint/stylelint)
 * SugarSS
   * [stylelint](https://github.com/stylelint/stylelint)
+* Svelte
+  * [prettier](https://github.com/prettier/prettier)
+  * [svelteserver](https://github.com/sveltejs/language-tools/tree/master/packages/language-server)
 * Swift
   * [Apple swift-format](https://github.com/apple/swift-format)
   * [sourcekit-lsp](https://github.com/apple/sourcekit-lsp)
diff --git a/test/command_callback/test_svelteserver_command_callback.vader b/test/command_callback/test_svelteserver_command_callback.vader
new file mode 100644
index 00000000..c09f1682
--- /dev/null
+++ b/test/command_callback/test_svelteserver_command_callback.vader
@@ -0,0 +1,8 @@
+Before:
+  call ale#assert#SetUpLinterTest('svelte', 'svelteserver')
+
+After:
+  call ale#assert#TearDownLinterTest()
+
+Execute(The default command should be correct):
+  AssertLinter 'svelteserver', ale#Escape('svelteserver') . ' --stdio'