feat(nvim,lsp,rust): add command for setting cargo target

I need to figure out how to do this without defer, or maybe even
reloading. The workspace seems to need to be reloaded after the
notification due to the [inactive-code] diagnostic, but the reload
request being processed before the notification is completed, so I can
only get it to work by defering. This technically introduces a race
condition?

1 files changed, 44 insertions, 0 deletions

diff --git a/nvim/.config/nvim/lua/tobyvin/plugins/rust-tools.lua b/nvim/.config/nvim/lua/tobyvin/plugins/rust-tools.lua
index b7eb84d..c15190a 100644
--- a/nvim/.config/nvim/lua/tobyvin/plugins/rust-tools.lua
+++ b/nvim/.config/nvim/lua/tobyvin/plugins/rust-tools.lua
@@ -17,6 +17,48 @@ local M = {
 	},
 }
 
+local function set_target()
+	local Job = require("plenary.job")
+	local targets = Job:new({
+		command = "rustc",
+		args = { "--print=target-list" },
+		enable_recording = true,
+	}):sync()
+	table.insert(targets, 1, "default")
+
+	vim.ui.select(targets, {}, function(input)
+		if not input then
+			return
+		end
+
+		if input == "default" then
+			input = nil
+		end
+
+		---@diagnostic disable-next-line: assign-type-mismatch
+		for _, client in pairs(vim.lsp.get_active_clients({ name = "rust_analyzer" })) do
+			client.config.settings["rust-analyzer"].cargo.target = input
+			client.notify("workspace/didChangeConfiguration", {
+				settings = client.config.settings,
+			})
+
+			-- TODO: Figure out how to do this without defer, or maybe even reloading.
+			-- The workspace seems to need to be reloaded after the notification due to the
+			-- [inactive-code] diagnostic, but the request being processed before the
+			-- notification is completed, so I can only get it to work by defering. This is
+			-- technically still a race condition?
+			vim.defer_fn(function()
+				client.request("rust-analyzer/reloadWorkspace", nil, function(err)
+					if err then
+						error(tostring(err))
+					end
+					vim.notify("Cargo workspace reloaded")
+				end, 0)
+			end, 500)
+		end
+	end)
+end
+
 function M.init()
 	require("tobyvin.lsp.configs").rust_analyzer = nil
 
@@ -28,6 +70,8 @@ function M.init()
 				return
 			end
 
+			vim.api.nvim_create_user_command("RustSetTarget", set_target, { desc = "Set cargo target" })
+
 			vim.keymap.set("n", "<leader>dd", require("rust-tools").debuggables.debuggables, {
 				desc = "debug",
 				buffer = args.buf,