[DRAFT] More formatters (#24)

* Add Rust formatter rustfmt.

* Add LaTeX formatter latexindent.

There's a lot of LaTeX modes. I'm not sure how to distinguish them.

* Alphabetize apheleia-formatters and apheleia-mode-alist.

Alphabetizing them makes it easier to find which formatters are
supported.

* Add Java formatter with google-java-format.

* Add C and C++ formatter with clang-format.

* Update changelog

Co-authored-by: Radon Rosborough <radon.neon@gmail.com>

2 files changed, 31 insertions, 8 deletions

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 09a0f87..09f2eb0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,15 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog].
 
 ## Unreleased
+### Formatters
+* [ClangFormat](https://clang.llvm.org/docs/ClangFormat.html) for
+  C/C++,
+  [`google-java-format`](https://github.com/google/google-java-format)
+  for Java, [latexindent](https://ctan.org/pkg/latexindent?lang=en)
+  for [LaTeX](https://www.latex-project.org/), and
+  [rustfmt](https://github.com/rust-lang/rustfmt) for
+  [Rust](https://www.rust-lang.org/) ([#24]).
+
 ### Bugs fixed
 * Fix spelling error in generated process names ([#32]).
 * Apheleia no longer conflicts with undo-fu (#[39]).
@@ -13,6 +22,7 @@ The format is based on [Keep a Changelog].
 * Fix inconsistent `:type` spec preventing use of `customize-variable`
   on `apheleia-formatters`.
 
+[#24]: https://github.com/raxod502/apheleia/pull/24
 [#30]: https://github.com/raxod502/apheleia/issues/30
 [#32]: https://github.com/raxod502/apheleia/pull/32
 [#39]: https://github.com/raxod502/apheleia/issues/39
diff --git a/apheleia.el b/apheleia.el
index 9ec573c..11b6176 100644
--- a/apheleia.el
+++ b/apheleia.el
@@ -461,9 +461,13 @@ modified from what is written to disk, then don't do anything."
 (defcustom apheleia-formatters
   '((black . ("black" "-"))
     (brittany . ("brittany" file))
-    (prettier . (npx "prettier" "--stdin-filepath" filepath))
+    (clang-format . ("clang-format" file))
     (gofmt . ("gofmt"))
+    (google-java-format . ("google-java-format" file))
+    (latexindent . ("latexindent" file))
     (ocamlformat . ("ocamlformat" file))
+    (prettier . (npx "prettier" "--stdin-filepath" filepath))
+    (rustfmt . ("rustfmt" "--quiet" "--emit" "stdout" file))
     (terraform . ("terraform" "fmt" "-")))
   "Alist of code formatting commands.
 The keys may be any symbols you want, and the values are
@@ -482,20 +486,29 @@ commands, lists of strings and symbols, in the format of
             (const :tag "Name of temporary file used for output" output)))))
 
 (defcustom apheleia-mode-alist
-  '((css-mode . prettier)
+  '((cc-mode . clang-format)
+    (c-mode . clang-format)
+    (css-mode . prettier)
     (go-mode . gofmt)
-    (js-mode . prettier)
+    (haskell-mode . brittany)
+    (html-mode . prettier)
+    (java-mode . google-java-format)
     (js3-mode . prettier)
+    (js-mode . prettier)
     (json-mode . prettier)
-    (html-mode . prettier)
+    (latex-mode . latexindent)
+    (LaTeX-mode . latexindent)
     (python-mode . black)
+    (rustic-mode . rustfmt)
+    (rust-mode . rustfmt)
     (sass-mode . prettier)
-    (typescript-mode . prettier)
-    (web-mode . prettier)
-    (yaml-mode . prettier)
     (terraform-mode . terraform)
+    (TeX-latex-mode . latexindent)
+    (TeX-mode . latexindent)
     (tuareg-mode . ocamlformat)
-    (haskell-mode . brittany))
+    (typescript-mode . prettier)
+    (web-mode . prettier)
+    (yaml-mode . prettier))
   "Alist mapping major mode names to formatters to use in those modes.
 This determines what formatter to use in buffers without a
 setting for `apheleia-formatter'. The keys are major mode