58 lines
1.1 KiB
Go
58 lines
1.1 KiB
Go
package cache
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import (
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"errors"
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"fmt"
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"golang.org/x/mod/semver"
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)
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type migrationFunc func(c *Cache) error
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// Registry of migrations by version
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var migrations = map[string]map[string]migrationFunc{
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"v0.1.0": {
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"Make Aliases Unique": v010_aliases,
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},
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}
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// Performs any required updates based on version
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// of cache read from disk.
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// Does not check to ensure migrations were successful,
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// only checks if a version has been achieved
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func (c *Cache) DoMigrations() error {
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c.lock.Lock()
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defer c.lock.Unlock()
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return c.doMigrations()
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}
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func (c *Cache) doMigrations() error {
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var errs error
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for version, migrationFuncs := range migrations {
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if semver.Compare(c.CacheVersion, version) < 0 {
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for name, migration := range migrationFuncs {
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err := migration(c)
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if err != nil {
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errs = errors.Join(
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errs,
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fmt.Errorf("%s - %s: %w", version, name, err),
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)
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}
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}
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// We've reached a cache version, update the CacheVersion
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// and write to disk
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if errs == nil {
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c.CacheVersion = version
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c.write()
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}
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}
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}
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return errs
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}
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func v010_aliases(c *Cache) error {
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return errors.New("unimplemented migration")
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}
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