package meta import ( "encoding/json" "errors" "fmt" "io/fs" "os" "strings" "github.com/adrg/xdg" ) type Meta struct { Packages map[string]string `json:"packages"` } func Upsert(name, version string) error { m, err := Read() if err != nil { return err } for n := range m.Packages { if strings.EqualFold(n, name) { m.Packages[n] = version return save(m) } } m.Packages[name] = version return save(m) } func Read() (Meta, error) { m := Meta{ Packages: make(map[string]string), } fp, err := metaPath() if err != nil { return m, fmt.Errorf("could not get meta file: %w", err) } fi, err := os.Open(fp) if err != nil { if errors.Is(err, fs.ErrNotExist) { return m, json.Unmarshal([]byte(`{}`), &m) } return m, fmt.Errorf("could not open meta file: %w", err) } defer fi.Close() if err := json.NewDecoder(fi).Decode(&m); err != nil { return m, fmt.Errorf("could not decode meta: %w", err) } return m, nil } func Remove(name string) error { m, err := Read() if err != nil { return err } for n := range m.Packages { if strings.EqualFold(n, name) { delete(m.Packages, name) return save(m) } } return fmt.Errorf("could not find package to remove for %q", name) } func metaPath() (string, error) { return xdg.DataFile("eget/meta.json") } func save(m Meta) error { fp, err := metaPath() if err != nil { return fmt.Errorf("could not get meta path: %w", err) } fi, err := os.Create(fp) if err != nil { return fmt.Errorf("could not create meta file: %w", err) } defer fi.Close() return json.NewEncoder(fi).Encode(m) }