136 lines
2.6 KiB
Go
136 lines
2.6 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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"go.jolheiser.com/eget/disk"
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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]Package `json:"packages"`
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}
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type Package struct {
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Repo string `json:"repo"`
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Version string `json:"version"`
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}
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func Upsert(name, repo, 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] = Package{
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Repo: repo,
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Version: version,
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}
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return save(m)
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}
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}
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m.Packages[name] = Package{
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Repo: repo,
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Version: version,
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}
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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]Package),
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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.ConfigFile("eget/packages.json")
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}
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func nushellPath() (string, error) {
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return xdg.DataFile("eget/eget.nu")
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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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if err := json.NewEncoder(fi).Encode(m); err != nil {
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return err
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}
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if err := fi.Close(); err != nil {
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return err
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}
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fp, err = nushellPath()
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if err != nil {
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return fmt.Errorf("could not get nushell 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 nushell file: %w", err)
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}
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defer fi.Close()
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out, err := m.nushell()
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if err != nil {
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return fmt.Errorf("could not generate nushell environment: %w", err)
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}
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fi.WriteString(out)
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return nil
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}
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func (m Meta) nushell() (string, error) {
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tmpl := "let-env PATH = ($env.PATH | append '%s')\n"
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var out strings.Builder
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out.WriteString("# managed by eget; DO NOT EDIT\n\n")
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for name := range m.Packages {
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out.WriteString(fmt.Sprintf(tmpl, disk.Path(name)))
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}
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return out.String(), nil
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}
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