test: unit (#97)

* refactor(utils): remove unused function

* fix(installer): actually pass what should be passed

* docs: add explanation comment

* test: add utils

* refactor(utils): flatten the dir of files

* remove .luarc

lua/gopher/_utils/gocmd.lua

@@ -0,0 +1,51 @@
+local r = require "gopher._utils.runner"
+local c = require("gopher.config").commands
+local u = require "gopher._utils"
+local gocmd = {}
+
+---@param args string[]
+---@return string[]
+local function if_get(args)
+  for i, arg in ipairs(args) do
+    local m = string.match(arg, "^https://(.*)$") or string.match(arg, "^http://(.*)$") or arg
+    table.remove(args, i)
+    table.insert(args, i, m)
+  end
+  return args
+end
+
+---@param args unknown[]
+---@return string[]
+local function if_generate(args)
+  if #args == 1 and args[1] == "%" then
+    args[1] = vim.fn.expand "%"
+  end
+  return args
+end
+
+---@param subcmd string
+---@param args string[]
+---@return string
+function gocmd.run(subcmd, args)
+  if #args == 0 and subcmd ~= "generate" then
+    error "please provide any arguments"
+  end
+
+  if subcmd == "get" then
+    args = if_get(args)
+  end
+
+  if subcmd == "generate" then
+    args = if_generate(args)
+  end
+
+  local rs = r.sync { c.go, subcmd, unpack(args) }
+  if rs.code ~= 0 then
+    error("go " .. subcmd .. " failed: " .. rs.stderr)
+  end
+
+  u.notify(c.go .. " " .. subcmd .. " ran successful")
+  return rs.stdout
+end
+
+return gocmd