Add stylua (#105)

CHANGELOG.md

@@ -7,6 +7,11 @@ The format is based on [Keep a Changelog].
 ### Enhancements
 * shfmt uses 4 spaces instead of tabs by default.
 
+### Formatters
+* [stylua](https://github.com/JohnnyMorganz/StyLua) for Lua ([#105]).
+
+[#105]: https://github.com/raxod502/apheleia/pull/105
+
 ## 3.0 (released 2022-06-01)
 ### Breaking changes
 * The arguments of formatters defined as Elisp functions has changed.

apheleia.el

@@ -936,6 +936,7 @@ being run, for diagnostic purposes."
     (phpcs . ("apheleia-phpcs"))
     (prettier . (npx "prettier" "--stdin-filepath" filepath))
     (shfmt . ("shfmt" "-i" "4"))
+    (stylua . ("stylua" "-"))
     (rustfmt . ("rustfmt" "--quiet" "--emit" "stdout"))
     (terraform . ("terraform" "fmt" "-")))
   "Alist of code formatting commands.
@@ -1064,6 +1065,7 @@ function: %s" command)))
     (kotlin-mode . ktlint)
     (latex-mode . latexindent)
     (LaTeX-mode . latexindent)
+    (lua-mode . stylua)
     (nix-mode . nixfmt)
     (python-mode . black)
     (ruby-mode . prettier)

test/formatters/installers/stylua.bash

@@ -0,0 +1,6 @@
+ver="$(latest_release JohnnyMorganz/StyLua | sed 's/^v//')"
+
+wget "https://github.com/JohnnyMorganz/StyLua/releases/download/v${ver}/stylua-linux.zip" -O stylua.zip
+unzip stylua.zip
+chmod +x stylua
+cp stylua /usr/local/bin/

test/formatters/samplecode/stylua/in.lua

@@ -0,0 +1,20 @@
+   too_many_spaces     =        true
+
+-- stylua: ignore
+local function foo    ()
+   return 1,
+      2,
+      3
+end
+
+local many, vars = function() return true end
+
+local function what_indent ()
+noindent  = true
+  if noindent  then
+     x = false
+  end
+      return x
+end
+
+local y = 'Double quotes are used'

test/formatters/samplecode/stylua/out.lua

@@ -0,0 +1,22 @@
+too_many_spaces = true
+
+-- stylua: ignore
+local function foo    ()
+   return 1,
+      2,
+      3
+end
+
+local many, vars = function()
+	return true
+end
+
+local function what_indent()
+	noindent = true
+	if noindent then
+		x = false
+	end
+	return x
+end
+
+local y = "Double quotes are used"