1// Copyright 2020 Google LLC
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7//     https://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15// Package client implements the hacksaw cli client
16package client
17
18import (
19	"io/ioutil"
20	"os"
21	"path"
22	"reflect"
23
24	"android.googlesource.com/platform/tools/treble.git/hacksaw/bind"
25	"android.googlesource.com/platform/tools/treble.git/hacksaw/config"
26)
27
28func ensureConfigFileExists(cfgPath string) error {
29	_, err := os.Stat(cfgPath)
30	if os.IsNotExist(err) {
31		//continue to init config file
32	} else {
33		return err
34	}
35
36	//init config file
37	if err = os.MkdirAll(path.Dir(cfgPath), os.ModePerm); err != nil {
38		return err
39	}
40	return ioutil.WriteFile(cfgPath, []byte("{}"), os.ModePerm)
41}
42
43func HandleCommand(workspaceTopDir string, pathBinder bind.PathBinder, args []string) error {
44	cfgPath := path.Join(workspaceTopDir, "config.json")
45	if err := ensureConfigFileExists(cfgPath); err != nil {
46		return err
47	}
48	cfg := config.GetConfig()
49	if err := cfg.ReadConfigFromFile(cfgPath); err != nil {
50		return err
51	}
52	//Save a copy of the config to detect changes
53	savedCfg := cfg.Copy()
54	cmd := NewCommand(pathBinder, workspaceTopDir)
55	if err := cmd.Handle(args); err != nil {
56		return err
57	}
58	if reflect.DeepEqual(savedCfg, cfg) {
59		return nil
60	}
61	return cfg.WriteConfigToFile(cfgPath)
62}
63