1 files changed, 34 insertions, 0 deletions
diff --git a/lua/mason-registry/index/fourmolu/init.lua b/lua/mason-registry/index/fourmolu/init.lua
new file mode 100644
index 00000000..f6849474
--- /dev/null
+++ b/lua/mason-registry/index/fourmolu/init.lua
@@ -0,0 +1,34 @@
+local Pkg = require "mason-core.package"
+local github = require "mason-core.managers.github"
+local _ = require "mason-core.functional"
+local platform = require "mason-core.platform"
+local std = require "mason-core.managers.std"
+
+return Pkg.new {
+    name = "fourmolu",
+    desc = [[A fork of Ormolu that uses four space indentation and allows arbitrary configuration.]],
+    homepage = "https://hackage.haskell.org/package/fourmolu",
+    languages = { Pkg.Lang.Haskell },
+    categories = { Pkg.Cat.Formatter },
+    ---@async
+    ---@param ctx InstallContext
+    install = function(ctx)
+        ---@param template string
+        local function release_file(template_string)
+            return _.compose(_.format(template_string), _.gsub("^v", ""))
+        end
+
+        github
+            .download_release_file({
+                repo = "fourmolu/fourmolu",
+                out_file = "fourmolu",
+                asset_file = _.coalesce(
+                    _.when(platform.is.mac_x64, release_file "fourmolu-%s-osx-x86_64"),
+                    _.when(platform.is.linux_x64_gnu, release_file "fourmolu-%s-linux-x86_64")
+                ),
+            })
+            .with_receipt()
+        std.chmod("+x", { "fourmolu" })
+        ctx:link_bin("fourmolu", "fourmolu")
+    end,
+}