
--- Module implementing the LuaRocks "remove" command.
-- Uninstalls rocks.
local cmd_remove = {}

local remove = require("luarocks.remove")
local util = require("luarocks.util")
local cfg = require("luarocks.core.cfg")
local fs = require("luarocks.fs")
local search = require("luarocks.search")
local path = require("luarocks.path")
local deps = require("luarocks.deps")
local writer = require("luarocks.manif.writer")
local queries = require("luarocks.queries")
local cmd = require("luarocks.cmd")

function cmd_remove.add_to_parser(parser)
   local cmd = parser:command("remove", [[
Uninstall a rock.

If a version is not given, try to remove all versions at once.
Will only perform the removal if it does not break dependencies.
To override this check and force the removal, use --force or --force-fast.]],
   util.see_also())
      :summary("Uninstall a rock.")

   cmd:argument("rock", "Name of the rock to be uninstalled.")
      :action(util.namespaced_name_action)
   cmd:argument("version", "Version of the rock to uninstall.")
      :args("?")

   cmd:flag("--force", "Force removal if it would break dependencies.")
   cmd:flag("--force-fast", "Perform a forced removal without reporting dependency issues.")
   util.deps_mode_option(cmd)
end

--- Driver function for the "remove" command.
-- @return boolean or (nil, string, exitcode): True if removal was
-- successful, nil and an error message otherwise. exitcode is optionally returned.
function cmd_remove.command(args)
   local name = args.rock
   local deps_mode = deps.get_deps_mode(args)
   
   local ok, err = fs.check_command_permissions(args)
   if not ok then return nil, err, cmd.errorcodes.PERMISSIONDENIED end
   
   local rock_type = name:match("%.(rock)$") or name:match("%.(rockspec)$")
   local version = args.version
   local filename = name
   if rock_type then
      name, version = path.parse_name(filename)
      if not name then return nil, "Invalid "..rock_type.." filename: "..filename end
   end

   local results = {}
   name = name:lower()
   search.local_manifest_search(results, cfg.rocks_dir, queries.new(name, args.namespace, version))
   if not results[name] then
      local rock = util.format_rock_name(name, args.namespace, version)
      return nil, "Could not find rock '"..rock.."' in "..path.rocks_tree_to_string(cfg.root_dir)
   end

   local ok, err = remove.remove_search_results(results, name, deps_mode, args.force, args.force_fast)
   if not ok then
      return nil, err
   end

   writer.check_dependencies(nil, deps.get_deps_mode(args))
   return true
end

return cmd_remove
