5151 add mdformat support (#5152)

* fix(tests): fix ale_c_build_dir_names being unset in tests (#5109)

- Use ale#Set() to set the ale_c_build_dir_names variable.
- Ensure SetUpLinterTest() is called before any Save commands in tests.
- Add c.vim to runtime before non-linter tests are executed.
- Remove workarounds in c.vim.

* feat: Load Prettier from cjs also

* Add support for mdformat

---------

Co-authored-by: w0rp <devw0rp@gmail.com>

doc/ale-markdown.txt

@@ -82,6 +82,77 @@ g:ale_markdown_marksman_executable
   Override the invoked `marksman` binary.
 
 
+===============================================================================
+mdformat                                                *ale-markdown-mdformat*
+
+                                      *ale-options.markdown_mdformat_executable*
+                                            *g:ale_markdown_mdformat_executable*
+                                            *b:ale_markdown_mdformat_executable*
+markdown_mdformat_executable
+g:ale_markdown_mdformat_executable
+  Type: |String|
+  Default: `'mdformat'`
+
+  See |ale-integrations-local-executables|
+
+  Set this to `'pipenv'` to invoke `pipenv run mdformat`.
+  Set this to `'poetry'` to invoke `poetry run mdformat`.
+  Set this to `'uv'` to invoke `uv run mdformat`.
+
+                                         *ale-options.markdown_mdformat_options*
+                                               *g:ale_markdown_mdformat_options*
+                                               *b:ale_markdown_mdformat_options*
+markdown_mdformat_options
+g:ale_markdown_mdformat_options
+  Type: |String|
+  Default: `''`
+
+  This variable can be changed to add command-line arguments to mdformat.
+
+                                      *ale-options.markdown_mdformat_use_global*
+                                            *g:ale_markdown_mdformat_use_global*
+                                            *b:ale_markdown_mdformat_use_global*
+markdown_mdformat_use_global
+g:ale_markdown_mdformat_use_global
+  Type: |Number|
+  Default: `get(g:, 'ale_use_global_executables', 0)`
+
+  See |ale-integrations-local-executables|
+
+                                     *ale-options.markdown_mdformat_auto_pipenv*
+                                           *g:ale_markdown_mdformat_auto_pipenv*
+                                           *b:ale_markdown_mdformat_auto_pipenv*
+markdown_mdformat_auto_pipenv
+g:ale_markdown_mdformat_auto_pipenv
+  Type: |Number|
+  Default: `0`
+
+  Detect whether the file is inside a pipenv, and set the executable to
+  `pipenv` if true. This is overridden by a manually-set executable.
+
+                                     *ale-options.markdown_mdformat_auto_poetry*
+                                           *g:ale_markdown_mdformat_auto_poetry*
+                                           *b:ale_markdown_mdformat_auto_poetry*
+markdown_mdformat_auto_poetry
+g:ale_markdown_mdformat_auto_poetry
+  Type: |Number|
+  Default: `0`
+
+  Detect whether the file is inside a Poetry project, and set the executable
+  to `poetry` if true. This is overridden by a manually-set executable.
+
+                                         *ale-options.markdown_mdformat_auto_uv*
+                                               *g:ale_markdown_mdformat_auto_uv*
+                                               *b:ale_markdown_mdformat_auto_uv*
+markdown_mdformat_auto_uv
+g:ale_markdown_mdformat_auto_uv
+  Type: |Number|
+  Default: `0`
+
+  Detect whether the file is inside a uv project, and set the executable to
+  `uv` if true. This is overridden by a manually-set executable.
+
+
 ===============================================================================
 mdl                                                          *ale-markdown-mdl*
 

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

@@ -436,6 +436,7 @@ Notes:
   * `languagetool`!!
   * `markdownlint`!!
   * `marksman`
+  * `mdformat`
   * `mdl`
   * `pandoc`
   * `prettier`

doc/ale.txt

@@ -3779,6 +3779,7 @@ documented in additional help files.
     harper................................|ale-markdown-harper|
     markdownlint..........................|ale-markdown-markdownlint|
     marksman..............................|ale-markdown-marksman|
+    mdformat..............................|ale-markdown-mdformat|
     mdl...................................|ale-markdown-mdl|
     pandoc................................|ale-markdown-pandoc|
     prettier..............................|ale-markdown-prettier|