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