81 lines
2.4 KiB
Go
81 lines
2.4 KiB
Go
// Package settings persists the daemon's user-editable configuration as a single
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// JSON file (~/.antidrift/settings.json), parallel to the store snapshot. It is a
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// leaf type package: it imports nothing else in the app so any layer may depend
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// on the Settings value without pulling in adapters.
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package settings
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import (
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"encoding/json"
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"errors"
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"os"
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"path/filepath"
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)
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// ErrInvalidBackend marks a settings value whose ai_backend is not a known
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// backend. The applier returns it (wrapped) so the HTTP layer can map it to 400
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// without importing the ai package.
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var ErrInvalidBackend = errors.New("settings: invalid ai backend")
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// Settings is the user-editable configuration. Field names mirror the env vars
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// they replace: ANTIDRIFT_AI_BACKEND, ANTIDRIFT_MARVIN_CMD, ANTIDRIFT_KNOWLEDGE_FILE.
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type Settings struct {
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AIBackend string `json:"ai_backend"`
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MarvinCmd string `json:"marvin_cmd"`
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KnowledgePath string `json:"knowledge_path"`
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}
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// DefaultPath returns ~/.antidrift/settings.json.
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func DefaultPath() (string, error) {
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home, err := os.UserHomeDir()
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if err != nil {
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return "", err
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}
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return filepath.Join(home, ".antidrift", "settings.json"), nil
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}
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// Load reads a settings file. A missing file is an error; callers treat that as
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// "first run" and seed instead.
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func Load(path string) (Settings, error) {
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data, err := os.ReadFile(path)
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if err != nil {
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return Settings{}, err
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}
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var s Settings
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if err := json.Unmarshal(data, &s); err != nil {
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return Settings{}, err
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}
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return s, nil
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}
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// Save writes settings atomically (temp file + rename), creating the directory
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// if needed. Mirrors store.Save.
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func Save(path string, s Settings) error {
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if err := os.MkdirAll(filepath.Dir(path), 0o755); err != nil {
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return err
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}
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data, err := json.MarshalIndent(s, "", " ")
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if err != nil {
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return err
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}
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tmp := path + ".tmp"
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if err := os.WriteFile(tmp, data, 0o644); err != nil {
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return err
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}
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return os.Rename(tmp, path)
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}
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// SeedFromEnv builds a Settings from the legacy ANTIDRIFT_* env vars, applying
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// the same defaults the daemon used before the settings file existed. An unset
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// AI backend defaults to "claude" (matching ai.NewBackend("")).
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func SeedFromEnv() Settings {
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backend := os.Getenv("ANTIDRIFT_AI_BACKEND")
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if backend == "" {
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backend = "claude"
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}
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return Settings{
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AIBackend: backend,
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MarvinCmd: os.Getenv("ANTIDRIFT_MARVIN_CMD"),
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KnowledgePath: os.Getenv("ANTIDRIFT_KNOWLEDGE_FILE"),
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}
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}
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