mirror of
https://github.com/splitsh/lite.git
synced 2024-06-04 14:52:23 +02:00
167 lines
3.2 KiB
Go
167 lines
3.2 KiB
Go
package splitter
|
|
|
|
import (
|
|
"crypto/sha1"
|
|
"fmt"
|
|
"io"
|
|
"path/filepath"
|
|
"strconv"
|
|
"time"
|
|
|
|
git "github.com/libgit2/git2go/v34"
|
|
bolt "go.etcd.io/bbolt"
|
|
)
|
|
|
|
type cache struct {
|
|
key []byte
|
|
branch string
|
|
db *bolt.DB
|
|
data map[string][]byte
|
|
}
|
|
|
|
func newCache(branch string, config *Config) (*cache, error) {
|
|
var err error
|
|
db := config.DB
|
|
if db == nil {
|
|
db, err = bolt.Open(filepath.Join(GitDirectory(config.Path), "splitsh.db"), 0644, &bolt.Options{Timeout: 5 * time.Second})
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
|
|
c := &cache{
|
|
db: db,
|
|
branch: branch,
|
|
key: key(config),
|
|
data: make(map[string][]byte),
|
|
}
|
|
|
|
err = db.Update(func(tx *bolt.Tx) error {
|
|
_, err1 := tx.CreateBucketIfNotExists(c.key)
|
|
return err1
|
|
})
|
|
if err != nil {
|
|
return nil, fmt.Errorf("impossible to create bucket: %s", err)
|
|
}
|
|
|
|
return c, nil
|
|
}
|
|
|
|
func (c *cache) close() error {
|
|
err := c.db.Update(func(tx *bolt.Tx) error {
|
|
for k, v := range c.data {
|
|
if err := tx.Bucket(c.key).Put([]byte(k), v); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
return nil
|
|
})
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
return c.db.Close()
|
|
}
|
|
|
|
func key(config *Config) []byte {
|
|
h := sha1.New()
|
|
if config.Commit != "" {
|
|
io.WriteString(h, config.Commit)
|
|
} else {
|
|
// value does not matter, should just be always the same
|
|
io.WriteString(h, "oldest")
|
|
}
|
|
|
|
io.WriteString(h, strconv.Itoa(config.Git))
|
|
|
|
for _, prefix := range config.Prefixes {
|
|
io.WriteString(h, prefix.From)
|
|
io.WriteString(h, prefix.To)
|
|
for _, exclude := range prefix.Excludes {
|
|
io.WriteString(h, exclude)
|
|
}
|
|
}
|
|
|
|
return h.Sum(nil)
|
|
}
|
|
|
|
func (c *cache) setHead(head *git.Oid) {
|
|
c.data["head/"+c.branch] = head[0:20]
|
|
}
|
|
|
|
func (c *cache) getHead() *git.Oid {
|
|
if head, ok := c.data["head"+c.branch]; ok {
|
|
return git.NewOidFromBytes(head)
|
|
}
|
|
|
|
var oid *git.Oid
|
|
c.db.View(func(tx *bolt.Tx) error {
|
|
result := tx.Bucket(c.key).Get([]byte("head/" + c.branch))
|
|
if result != nil {
|
|
c.data["head/"+c.branch] = result
|
|
oid = git.NewOidFromBytes(result)
|
|
}
|
|
return nil
|
|
})
|
|
return oid
|
|
}
|
|
|
|
func (c *cache) get(rev *git.Oid) *git.Oid {
|
|
if v, ok := c.data[string(rev[0:20])]; ok {
|
|
return git.NewOidFromBytes(v)
|
|
}
|
|
|
|
var oid *git.Oid
|
|
c.db.View(func(tx *bolt.Tx) error {
|
|
result := tx.Bucket(c.key).Get(rev[0:20])
|
|
if result != nil {
|
|
c.data[string(rev[0:20])] = result
|
|
oid = git.NewOidFromBytes(result)
|
|
}
|
|
return nil
|
|
})
|
|
return oid
|
|
}
|
|
|
|
func (c *cache) set(rev, newrev *git.Oid) {
|
|
c.data[string(rev[0:20])] = newrev[0:20]
|
|
}
|
|
|
|
func (c *cache) gets(commits []*git.Oid) []*git.Oid {
|
|
var oids []*git.Oid
|
|
c.db.View(func(tx *bolt.Tx) error {
|
|
b := tx.Bucket(c.key)
|
|
for _, commit := range commits {
|
|
result := c.data[string(commit[0:20])]
|
|
if result != nil {
|
|
oids = append(oids, git.NewOidFromBytes(result))
|
|
} else {
|
|
result := b.Get(commit[0:20])
|
|
if result != nil {
|
|
oids = append(oids, git.NewOidFromBytes(result))
|
|
}
|
|
}
|
|
}
|
|
return nil
|
|
})
|
|
return oids
|
|
}
|
|
|
|
func (c *cache) flush() error {
|
|
return c.db.Update(func(tx *bolt.Tx) error {
|
|
if tx.Bucket(c.key) != nil {
|
|
err := tx.DeleteBucket(c.key)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
_, err = tx.CreateBucketIfNotExists(c.key)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
return nil
|
|
})
|
|
}
|