1package store
 2
 3import (
 4	"context"
 5	"errors"
 6	"sync"
 7
 8	"github.com/go-git/go-billy/v5"
 9)
10
11// Constructor is a function that returns a new store.
12type Constructor func(ctx context.Context, fs billy.Filesystem) (Store, error)
13
14var (
15	registry = map[string]Constructor{}
16	mtx      sync.RWMutex
17
18	// ErrStoreNotFound is returned when a store is not found.
19	ErrStoreNotFound = errors.New("store not found")
20)
21
22// Register registers a store.
23func Register(name string, fn Constructor) {
24	mtx.Lock()
25	defer mtx.Unlock()
26
27	registry[name] = fn
28}
29
30// New returns a new store.
31func New(ctx context.Context, fs billy.Filesystem, name string) (Store, error) {
32	mtx.RLock()
33	fn, ok := registry[name]
34	mtx.RUnlock()
35
36	if !ok {
37		return nil, ErrStoreNotFound
38	}
39
40	return fn(ctx, fs)
41}
42
43// List returns a list of registered stores.
44func List() []string {
45	mtx.Lock()
46	defer mtx.Unlock()
47	stores := make([]string, 0)
48	for name := range registry {
49		stores = append(stores, name)
50	}
51	return stores
52}