77 lines
1.7 KiB
Go
77 lines
1.7 KiB
Go
package config
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import (
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"io"
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"os"
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"path/filepath"
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)
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// MigrateLegacy moves the download ledger from the old ~/.godeez directory
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// next to the user's music, where it now lives.
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//
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// It is silent and best effort throughout. A failed migration costs the user
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// their skip history, which the next download simply rebuilds, so there is
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// nothing worth interrupting them about. An existing database at the new
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// location always wins, which makes this safe to run on every download rather
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// than needing a flag to say whether it has happened yet.
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//
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// The rename is attempted first and falls back to a copy, because the old and
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// new locations are often on different filesystems.
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func MigrateLegacy(outputDir string) {
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homeDir, err := os.UserHomeDir()
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if err != nil {
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return
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}
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oldDir := filepath.Join(homeDir, ".godeez")
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oldDB := filepath.Join(oldDir, "tracks.db")
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newDB := filepath.Join(outputDir, ".tracks.db")
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if _, err := os.Stat(oldDB); err == nil {
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if _, err := os.Stat(newDB); os.IsNotExist(err) {
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if err := os.Rename(oldDB, newDB); err != nil {
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if err := copyFile(oldDB, newDB); err != nil {
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return
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}
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os.Remove(oldDB)
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}
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}
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}
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os.Remove(oldDir)
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}
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func copyFile(src, dst string) error {
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in, err := os.Open(src)
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if err != nil {
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return err
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}
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defer in.Close()
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out, err := os.CreateTemp(filepath.Dir(dst), ".tracks.db-*.tmp")
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if err != nil {
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return err
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}
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tmp := out.Name()
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if _, err := io.Copy(out, in); err != nil {
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out.Close()
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os.Remove(tmp)
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return err
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}
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if err := out.Sync(); err != nil {
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out.Close()
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os.Remove(tmp)
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return err
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}
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if err := out.Close(); err != nil {
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os.Remove(tmp)
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return err
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}
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if err := os.Rename(tmp, dst); err != nil {
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os.Remove(tmp)
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return err
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}
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return nil
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}
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