Dhall language support (fixes #2820)

autoload/ale/dhall.vim

@@ -0,0 +1,21 @@
+" Author: toastal <toastal@protonmail.com>
+" Description: Functions for working with Dhall’s executable
+
+call ale#Set('dhall_executable', 'dhall')
+call ale#Set('dhall_use_global', get(g:, 'ale_use_global_executables', 0))
+call ale#Set('dhall_options', '')
+
+function! ale#dhall#GetExecutable(buffer) abort
+    return ale#Escape(ale#Var(a:buffer, 'dhall_executable'))
+endfunction
+
+function! ale#dhall#GetExecutableWithOptions(buffer) abort
+    let l:executable = ale#dhall#GetExecutable(a:buffer)
+
+    return l:executable
+    \   . ale#Pad(ale#Var(a:buffer, 'dhall_options'))
+endfunction
+
+function! ale#dhall#GetCommand(buffer) abort
+    return '%e ' . ale#Pad(ale#Var(a:buffer, 'dhall_options'))
+endfunction

autoload/ale/fix/registry.vim

@@ -32,6 +32,21 @@ let s:default_registry = {
 \       'suggested_filetypes': ['d'],
 \       'description': 'Fix D files with dfmt.',
 \   },
+\   'dhall-format': {
+\       'function': 'ale#fixers#dhall_format#Fix',
+\       'suggested_filetypes': ['dhall'],
+\       'description': 'Standard code formatter for the Dhall language',
+\   },
+\   'dhall-freeze': {
+\       'function': 'ale#fixers#dhall_freeze#Freeze',
+\       'suggested_filetypes': ['dhall'],
+\       'description': 'Add integrity checks to remote import statements of an expression for the Dhall language',
+\   },
+\   'dhall-lint': {
+\       'function': 'ale#fixers#dhall_lint#Fix',
+\       'suggested_filetypes': ['dhall'],
+\       'description': 'Standard code formatter for the Dhall language and removing dead code',
+\   },
 \   'fecs': {
 \       'function': 'ale#fixers#fecs#Fix',
 \       'suggested_filetypes': ['javascript', 'css', 'html'],

autoload/ale/fixers/dhall_format.vim

@@ -0,0 +1,14 @@
+" Author: toastal <toastal@protonmail.com>
+" Description: Dhall’s built-in formatter
+
+function! ale#fixers#dhall_format#Fix(buffer) abort
+    let l:executable = ale#dhall#GetExecutableWithOptions(a:buffer)
+    let l:command = l:executable
+    \   . ' format'
+    \   . ' --inplace %t'
+
+    return {
+    \   'command': l:command,
+    \   'read_temporary_file': 1,
+    \}
+endfunction

autoload/ale/fixers/dhall_freeze.vim

@@ -0,0 +1,18 @@
+" Author: toastal <toastal@protonmail.com>
+" Description: Dhall’s package freezing
+
+call ale#Set('dhall_freeze_options', '')
+
+function! ale#fixers#dhall_freeze#Freeze(buffer) abort
+    let l:executable = ale#dhall#GetExecutableWithOptions(a:buffer)
+    let l:command = l:executable
+    \   . ' freeze'
+    \   . ale#Pad(ale#Var(a:buffer, 'dhall_freeze_options'))
+    \   . ' --inplace %t'
+
+
+    return {
+    \   'command': l:command,
+    \   'read_temporary_file': 1,
+    \}
+endfunction

autoload/ale/fixers/dhall_lint.vim

@@ -0,0 +1,14 @@
+" Author: toastal <toastal@protonmail.com>
+" Description: Dhall’s built-in linter/formatter
+
+function! ale#fixers#dhall_lint#Fix(buffer) abort
+    let l:executable = ale#dhall#GetExecutableWithOptions(a:buffer)
+    let l:command = l:executable
+    \   . ' lint'
+    \   . ' --inplace %t'
+
+    return {
+    \   'command': l:command,
+    \   'read_temporary_file': 1,
+    \}
+endfunction

doc/ale-dhall.txt

@@ -0,0 +1,52 @@
+===============================================================================
+ALE Dhall Integration                                       *ale-dhall-options*
+
+g:ale_dhall_executable                                 *g:ale_dhall_executable*
+                                                       *b:ale_dhall_executable*
+  Type: |String|
+  Default: `'dhall'`
+
+g:ale_dhall_options                                       g:ale_dhall_options
+                                                          b:ale_dhall_options
+  Type: |String|
+  Default: `''`
+
+  This variable can be set to pass additional options to the 'dhall` executable.
+  This is shared with `dhall-freeze` and `dhall-lint`.
+>
+  let g:dhall_options = '--ascii'
+<
+
+===============================================================================
+dhall-format                                                 *ale-dhall-format*
+
+Dhall
+  (https://dhall-lang.org/)
+
+
+===============================================================================
+dhall-freeze                                                 *ale-dhall-freeze*
+
+Dhall
+  (https://dhall-lang.org/)
+
+g:ale_dhall_freeze_options                         g:ale_dhall_freeze_options
+                                                   b:ale_dhall_freeze_options
+  Type: |String|
+  Default: `''`
+
+  This variable can be set to pass additional options to the 'dhall freeze`
+  executable.
+>
+  let g:dhall_freeze_options = '--all'
+<
+
+===============================================================================
+dhall-lint                                                     *ale-dhall-lint*
+
+Dhall
+  (https://dhall-lang.org/)
+
+
+===============================================================================
+  vim:tw=78:ts=2:sts=2:sw=2:ft=help:norl:

doc/ale.txt

@@ -2374,6 +2374,10 @@ documented in additional help files.
   dart....................................|ale-dart-options|
     dartanalyzer..........................|ale-dart-dartanalyzer|
     dartfmt...............................|ale-dart-dartfmt|
+  dhall...................................|ale-dhall-options|
+    dhall-format..........................|ale-dhall-format|
+    dhall-freeze..........................|ale-dhall-freeze|
+    dhall-lint............................|ale-dhall-lint|
   dockerfile..............................|ale-dockerfile-options|
     dockerfile_lint.......................|ale-dockerfile-dockerfile_lint|
     hadolint..............................|ale-dockerfile-hadolint|

supported-tools.md

@@ -127,6 +127,10 @@ formatting.
   * [dartanalyzer](https://github.com/dart-lang/sdk/tree/master/pkg/analyzer_cli) :floppy_disk:
   * [dartfmt](https://github.com/dart-lang/sdk/tree/master/utils/dartfmt)
   * [language_server](https://github.com/natebosch/dart_language_server)
+* Dhall
+  * [dhall-format](https://github.com/dhall-lang)
+  * [dhall-freeze](https://github.com/dhall-lang)
+  * [dhall-lint](https://github.com/dhall-lang)
 * Dockerfile
   * [dockerfile_lint](https://github.com/projectatomic/dockerfile_lint)
   * [hadolint](https://github.com/hadolint/hadolint)