refactor(git): centralize registrations, defer submodule loads

lua/git/cmd.lua

@@ -18,11 +18,17 @@ local SPLIT_HANDLERS = {
 ---@type string[]?
 local cached_cmds
 
----@param result vim.SystemCompleted
-local function populate_cached_cmds(result)
+---@return string[]
+local function git_cmds()
+    if cached_cmds then
+        return cached_cmds
+    end
+    local result = vim
+        .system({ "git", "--list-cmds=main,others,alias" }, { text = true })
+        :wait()
     if result.code ~= 0 then
         util.error("git --list-cmds failed: %s", vim.trim(result.stderr or ""))
-        return
+        return {}
     end
     cached_cmds = {}
     for line in (result.stdout or ""):gmatch("[^\r\n]+") do
@@ -31,26 +37,7 @@ local function populate_cached_cmds(result)
         end
     end
     table.sort(cached_cmds)
-end
-
-local function prefetch_cmds()
-    vim.system(
-        { "git", "--list-cmds=main,others,alias" },
-        { text = true },
-        vim.schedule_wrap(populate_cached_cmds)
-    )
-end
-
----@return string[]
-local function git_cmds()
-    if cached_cmds then
-        return cached_cmds
-    end
-    populate_cached_cmds(
-        vim.system({ "git", "--list-cmds=main,others,alias" }, { text = true })
-            :wait()
-    )
-    return cached_cmds or {}
+    return cached_cmds
 end
 
 ---@param args string[]
@@ -233,7 +220,7 @@ end
 ---@param arg_lead string
 ---@param cmd_line string
 ---@return string[]
-local function complete(arg_lead, cmd_line, _)
+function M.complete(arg_lead, cmd_line, _)
     local rest = cmd_line:gsub("^%s*%S+%s*", "", 1)
     local words = vim.split(rest, "%s+", { trimempty = false })
     if #words > 1 then
@@ -248,14 +235,4 @@ local function complete(arg_lead, cmd_line, _)
     return matches
 end
 
-function M.setup()
-    prefetch_cmds()
-    vim.api.nvim_create_user_command("G", function(opts)
-        M.run(opts.fargs)
-    end, {
-        nargs = "*",
-        complete = complete,
-    })
-end
-
 return M