func GetSchemaFromDb(b *bolt.DB) Schema {
// first version
v := First
err := b.View(func(t *bolt.Tx) error {
b := t.Bucket(AboutBucket)
if b == nil {
return nil
}
v = VersionFromString(string(b.Get([]byte("about"))))
return nil
})
if err != nil {
return Schemas[0]
}
// find the oldest valid schema
for _, s := range Schemas {
// best case, exact match
if s.Version == v {
return s
}
// as soon as we find an older version, this is the one
if !s.Version.Greater(v) {
return s
}
}
return Schemas[0]
}