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| 1 | +package cli_config |
| 2 | + |
| 3 | +import ( |
| 4 | + "errors" |
| 5 | + "fmt" |
| 6 | + "os" |
| 7 | + "reflect" |
| 8 | + "strconv" |
| 9 | + "strings" |
| 10 | + |
| 11 | + "gopkg.in/yaml.v2" |
| 12 | +) |
| 13 | + |
| 14 | +type Config struct { |
| 15 | + AskVaultPass bool `yaml:"ask_vault_pass"` |
| 16 | + CheckForUpdates bool `yaml:"check_for_updates"` |
| 17 | + LoadPlugins bool `yaml:"load_plugins"` |
| 18 | + Open map[string]string `yaml:"open"` |
| 19 | + VirtualenvIntegration bool `yaml:"virtualenv_integration"` |
| 20 | +} |
| 21 | + |
| 22 | +var ( |
| 23 | + ErrUnsupportedType = errors.New("Invalid env var config setting: value is an unsupported type.") |
| 24 | + ErrCouldNotParse = errors.New("Invalid env var config setting: failed to parse value") |
| 25 | +) |
| 26 | + |
| 27 | +func NewConfig(defaultConfig Config) Config { |
| 28 | + return defaultConfig |
| 29 | +} |
| 30 | + |
| 31 | +func (c *Config) LoadFile(path string) error { |
| 32 | + configYaml, err := os.ReadFile(path) |
| 33 | + |
| 34 | + if err != nil && !os.IsNotExist(err) { |
| 35 | + return err |
| 36 | + } |
| 37 | + |
| 38 | + if err := yaml.Unmarshal(configYaml, &c); err != nil { |
| 39 | + return err |
| 40 | + } |
| 41 | + |
| 42 | + return nil |
| 43 | +} |
| 44 | + |
| 45 | +func (c *Config) LoadEnv(prefix string) error { |
| 46 | + structType := reflect.ValueOf(c).Elem() |
| 47 | + fields := reflect.VisibleFields(structType.Type()) |
| 48 | + |
| 49 | + for _, env := range os.Environ() { |
| 50 | + parts := strings.Split(env, "=") |
| 51 | + originalKey := parts[0] |
| 52 | + value := parts[1] |
| 53 | + |
| 54 | + key := strings.TrimPrefix(originalKey, prefix) |
| 55 | + |
| 56 | + if originalKey == key { |
| 57 | + // key is unchanged and didn't start with prefix |
| 58 | + continue |
| 59 | + } |
| 60 | + |
| 61 | + for _, field := range fields { |
| 62 | + if strings.ToLower(key) == field.Tag.Get("yaml") { |
| 63 | + structValue := structType.FieldByName(field.Name) |
| 64 | + |
| 65 | + if !structValue.CanSet() { |
| 66 | + continue |
| 67 | + } |
| 68 | + |
| 69 | + switch field.Type.Kind() { |
| 70 | + case reflect.Bool: |
| 71 | + val, err := strconv.ParseBool(value) |
| 72 | + |
| 73 | + if err != nil { |
| 74 | + return fmt.Errorf("%w '%s'\n'%s' can't be parsed as a boolean", ErrCouldNotParse, env, value) |
| 75 | + } |
| 76 | + |
| 77 | + structValue.SetBool(val) |
| 78 | + case reflect.Int: |
| 79 | + val, err := strconv.ParseInt(value, 10, 32) |
| 80 | + |
| 81 | + if err != nil { |
| 82 | + return fmt.Errorf("%w '%s'\n'%s' can't be parsed as an integer", ErrCouldNotParse, env, value) |
| 83 | + } |
| 84 | + |
| 85 | + structValue.SetInt(val) |
| 86 | + case reflect.Float32: |
| 87 | + val, err := strconv.ParseFloat(value, 32) |
| 88 | + if err != nil { |
| 89 | + return fmt.Errorf("%w '%s'\n'%s' can't be parsed as a float", ErrCouldNotParse, env, value) |
| 90 | + } |
| 91 | + |
| 92 | + structValue.SetFloat(val) |
| 93 | + default: |
| 94 | + return fmt.Errorf("%w\n%s setting of type %s is unsupported.", ErrUnsupportedType, env, field.Type.String()) |
| 95 | + } |
| 96 | + } |
| 97 | + } |
| 98 | + } |
| 99 | + |
| 100 | + return nil |
| 101 | +} |
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