From 0ff1b7d32fd3e8df194ca5ebec1dab9c61fb9911 Mon Sep 17 00:00:00 2001
From: Steven Arcangeli <506791+stevearc@users.noreply.github.com>
Date: Wed, 13 Mar 2024 08:43:23 -0700
Subject: fix(rustfmt): use Cargo.toml settings and default to recent edition
 (#328)

---
 lua/conform/formatters/rustfmt.lua | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

(limited to 'lua/conform/formatters/rustfmt.lua')

diff --git a/lua/conform/formatters/rustfmt.lua b/lua/conform/formatters/rustfmt.lua
index d8f0f19..34fb09b 100644
--- a/lua/conform/formatters/rustfmt.lua
+++ b/lua/conform/formatters/rustfmt.lua
@@ -5,5 +5,18 @@ return {
     description = "A tool for formatting rust code according to style guidelines.",
   },
   command = "rustfmt",
-  args = { "--emit=stdout" },
+  options = {
+    -- The default edition of Rust to use when no Cargo.toml file is found
+    default_edition = "2021",
+  },
+  args = function(self, ctx)
+    local args = { "--emit=stdout" }
+    local manifest = vim.fs.find("Cargo.toml", { upward = true, path = ctx.dirname })[1]
+    if manifest then
+      table.insert(args, "--manifest-path=" .. manifest)
+    elseif self.options.default_edition then
+      table.insert(args, "--edition=" .. self.options.default_edition)
+    end
+    return args
+  end,
 }
-- 
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