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