feat(struct_tags): add support for custom transform option

lua/gopher/config.lua

@@ -1,6 +1,14 @@
 ---@type gopher.Config
 local config = {}
 
+---@alias gopher.ConfigGoTagTransform
+---| "snakecase"  "GopherUser" -> "gopher_user"
+---| "camelcase"  "GopherUser" -> "gopherUser"
+---| "lispcase"   "GopherUser" -> "gopher-user"
+---| "pascalcase" "GopherUser" -> "GopherUser"
+---| "titlecase"  "GopherUser" -> "Gopher User"
+---| "keep"       keeps the original field name
+
 ---@class gopher.Config
 local default_config = {
   ---@class gopher.ConfigCommand
@@ -20,6 +28,11 @@ local default_config = {
     ---@type string|nil
     template_dir = nil,
   },
+  ---@class gopher.ConfigGoTag
+  gotag = {
+    ---@type gopher.ConfigGoTagTransform
+    transform = "snakecase",
+  },
 }
 
 ---@type gopher.Config

lua/gopher/struct_tags.lua

@@ -1,6 +1,6 @@
 local ts_utils = require "gopher._utils.ts"
 local r = require "gopher._utils.runner"
-local c = require("gopher.config").commands
+local c = require "gopher.config"
 local struct_tags = {}
 
 local function modify(...)
@@ -12,6 +12,7 @@ local function modify(...)
 
   -- stylua: ignore
   local cmd_args = {
+    "-transform", c.gotag.transform,
     "-format", "json",
     "-file", fpath,
     "-w"
@@ -38,7 +39,7 @@ local function modify(...)
     table.insert(cmd_args, "json")
   end
 
-  local output = r.sync(c.gomodifytags, {
+  local output = r.sync(c.commands.gomodifytags, {
     args = cmd_args,
     on_exit = function(data, status)
       if not status == 0 then