|
| 1 | +package vault |
| 2 | + |
| 3 | +import ( |
| 4 | + "errors" |
| 5 | + "fmt" |
| 6 | + "os" |
| 7 | + "path/filepath" |
| 8 | + "strings" |
| 9 | + |
| 10 | + "github.com/knadh/koanf/parsers/json" |
| 11 | + "github.com/knadh/koanf/parsers/toml" |
| 12 | + "github.com/knadh/koanf/parsers/yaml" |
| 13 | + "github.com/knadh/koanf/providers/env" |
| 14 | + "github.com/knadh/koanf/providers/file" |
| 15 | + "github.com/knadh/koanf/v2" |
| 16 | +) |
| 17 | + |
| 18 | +const ( |
| 19 | + envPrefix = "FLOW_VAULT_" |
| 20 | + vaultConfigFileName = "vaults" |
| 21 | + vaultConfigFileExt = ".yaml" |
| 22 | +) |
| 23 | + |
| 24 | +type VaultConfig struct { |
| 25 | + // Provider specifies the provider's type |
| 26 | + Provider string `koanf:"provider"` |
| 27 | + // Config specifies the provider-specific configuration |
| 28 | + Config map[string]interface{} `koanf:"config"` |
| 29 | +} |
| 30 | + |
| 31 | +type Config struct { |
| 32 | + // Current specifies the name of thr current vault to use |
| 33 | + Current string `koanf:"current"` |
| 34 | + // Vaults specifies a map of vault names to their configurations |
| 35 | + Vaults map[string]VaultConfig `koanf:"vaults"` |
| 36 | +} |
| 37 | + |
| 38 | +type LoadOptions struct { |
| 39 | + ConfigPath string |
| 40 | + AutoDiscoveryPath string |
| 41 | + AllowEnv bool |
| 42 | + RequireConfig bool |
| 43 | +} |
| 44 | + |
| 45 | +// LoadCOnfig loads the vault configuration from the specified sources |
| 46 | +func LoadConfig(opts LoadOptions) (*Config, error) { |
| 47 | + k := koanf.New(".") |
| 48 | + |
| 49 | + if opts.AutoDiscoveryPath != "" { |
| 50 | + if err := loadFromDir(k, opts.AutoDiscoveryPath); err != nil { |
| 51 | + if opts.RequireConfig || !errors.Is(err, os.ErrNotExist) { |
| 52 | + return nil, fmt.Errorf("failed to load config dir: %w", err) |
| 53 | + } |
| 54 | + } |
| 55 | + } |
| 56 | + |
| 57 | + if opts.ConfigPath != "" { |
| 58 | + if err := loadFromFile(k, opts.ConfigPath); err != nil { |
| 59 | + if opts.RequireConfig || !errors.Is(err, os.ErrNotExist) { |
| 60 | + return nil, fmt.Errorf("failed to load config file: %w", err) |
| 61 | + } |
| 62 | + } |
| 63 | + } |
| 64 | + |
| 65 | + if opts.AllowEnv { |
| 66 | + if err := loadFromEnv(k); err != nil { |
| 67 | + return nil, fmt.Errorf("failed to load environment variables: %w", err) |
| 68 | + } |
| 69 | + } |
| 70 | + |
| 71 | + var cfg Config |
| 72 | + if err := k.Unmarshal("", &cfg); err != nil { |
| 73 | + return nil, fmt.Errorf("failed to unmarshal config: %w", err) |
| 74 | + } |
| 75 | + |
| 76 | + return &cfg, nil |
| 77 | +} |
| 78 | + |
| 79 | +// loadFromFile loads configuration from a file, supporting multiple formats |
| 80 | +func loadFromFile(k *koanf.Koanf, path string) error { |
| 81 | + var parser koanf.Parser |
| 82 | + |
| 83 | + switch strings.ToLower(filepath.Ext(path)) { |
| 84 | + case ".yaml", ".yml": |
| 85 | + parser = yaml.Parser() |
| 86 | + case ".json": |
| 87 | + parser = json.Parser() |
| 88 | + case ".toml": |
| 89 | + parser = toml.Parser() |
| 90 | + default: |
| 91 | + return fmt.Errorf("unsupported config file format: %s", path) |
| 92 | + } |
| 93 | + |
| 94 | + if err := k.Load(file.Provider(path), parser); err != nil { |
| 95 | + return err |
| 96 | + } |
| 97 | + |
| 98 | + return nil |
| 99 | +} |
| 100 | + |
| 101 | +// loadFromDir loads configuration from a directory, supporting multiple formats |
| 102 | +func loadFromDir(k *koanf.Koanf, path string) error { |
| 103 | + if _, err := os.Stat(filepath.Join(path, vaultConfigFileName+vaultConfigFileExt)); err != nil { |
| 104 | + if !os.IsNotExist(err) { |
| 105 | + return err |
| 106 | + } |
| 107 | + } else { |
| 108 | + return loadFromFile(k, filepath.Join(path, vaultConfigFileName+vaultConfigFileExt)) |
| 109 | + } |
| 110 | + if _, err := os.Stat(filepath.Join(path, vaultConfigFileName+".yml")); err != nil { |
| 111 | + if !os.IsNotExist(err) { |
| 112 | + return err |
| 113 | + } |
| 114 | + } else { |
| 115 | + return loadFromFile(k, filepath.Join(path, vaultConfigFileName+".yml")) |
| 116 | + } |
| 117 | + if _, err := os.Stat(filepath.Join(path, vaultConfigFileName+".json")); err != nil { |
| 118 | + if !os.IsNotExist(err) { |
| 119 | + return err |
| 120 | + } |
| 121 | + } else { |
| 122 | + return loadFromFile(k, filepath.Join(path, vaultConfigFileName+".json")) |
| 123 | + } |
| 124 | + if _, err := os.Stat(filepath.Join(path, vaultConfigFileName+".toml")); err != nil { |
| 125 | + if !os.IsNotExist(err) { |
| 126 | + return err |
| 127 | + } |
| 128 | + } else { |
| 129 | + return loadFromFile(k, filepath.Join(path, vaultConfigFileName+".toml")) |
| 130 | + } |
| 131 | + return fmt.Errorf("no config file found with name %s: %w", vaultConfigFileName, os.ErrNotExist) |
| 132 | +} |
| 133 | + |
| 134 | +// loadFromEnv loads configuration from environment variables |
| 135 | +func loadFromEnv(k *koanf.Koanf) error { |
| 136 | + return k.Load(env.Provider(envPrefix, ".", func(s string) string { |
| 137 | + return strings.Replace(strings.ToLower( |
| 138 | + strings.TrimPrefix(s, envPrefix)), "_", ".", -1) |
| 139 | + }), nil) |
| 140 | +} |
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