alex/vfs
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Cleanup

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This commit is contained in:
Alex Yatskov 2015-05-28 18:34:01 +09:00
parent e512bd689e
commit 55d6408a17
2 changed files with 60 additions and 70 deletions
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90
database.go
View File

@ -24,15 +24,9 @@ package main
import (
"bazil.org/fuse/fs"
"errors"
"fmt"
"io/ioutil"
"os"
"path"
"path/filepath"
"regexp"
"strconv"
"time"
)
//
@ -61,16 +55,11 @@ func (this *database) load(dir string) error {
return err
}
if err := this.buildNewVersion(this.base); err != nil {
if err := buildNewVersion(this.base); err != nil {
return nil
}
names, err := this.scanVersions(this.base)
if err != nil {
return err
}
this.vers, err = this.buildVersions(this.base, names)
this.vers, err = this.buildVersions(this.base)
if err != nil {
return err
}
@ -86,17 +75,26 @@ func (this *database) save() error {
return nil
}
func (this *database) buildVersions(base string, names []string) ([]*version, error) {
var vers []*version
var parent *version
for _, name := range names {
timestamp, err := this.parseVerName(name)
func (this *database) buildVersions(base string) ([]*version, error) {
nodes, err := ioutil.ReadDir(base)
if err != nil {
return nil, err
}
ver, err := newVersion(path.Join(base, name), timestamp, parent)
var parent *version
var vers []*version
for _, node := range nodes {
if !node.IsDir() {
continue
}
timestamp, err := parseVerName(node.Name())
if err != nil {
return nil, err
}
ver, err := newVersion(path.Join(base, node.Name()), timestamp, parent)
if err != nil {
return nil, err
}
@ -112,19 +110,6 @@ func (this *database) buildVersions(base string, names []string) ([]*version, er
return vers, nil
}
func (this *database) buildNewVersion(base string) error {
name := this.buildVerName(time.Now())
if err := os.Mkdir(path.Join(base, name), 0755); err != nil {
return err
}
if err := os.Mkdir(path.Join(base, name, "root"), 0755); err != nil {
return err
}
return nil
}
func (this *database) lastVersion() *version {
count := len(this.vers)
if count == 0 {
@ -134,45 +119,6 @@ func (this *database) lastVersion() *version {
return this.vers[count-1]
}
func (this *database) scanVersions(dir string) ([]string, error) {
nodes, err := ioutil.ReadDir(dir)
if err != nil {
return nil, err
}
var names []string
for _, node := range nodes {
if node.IsDir() {
names = append(names, node.Name())
}
}
return names, nil
}
func (this *database) Root() (fs.Node, error) {
return this.lastVersion().root, nil
}
func (this *database) buildVerName(timestamp time.Time) string {
return fmt.Sprintf("ver_%.16x", timestamp.Unix())
}
func (this *database) parseVerName(name string) (time.Time, error) {
re, err := regexp.Compile(`ver_([0-9a-f]+)$`)
if err != nil {
return time.Unix(0, 0), err
}
matches := re.FindStringSubmatch(name)
if len(matches) < 2 {
return time.Unix(0, 0), errors.New("invalid version identifier")
}
timestamp, err := strconv.ParseInt(matches[1], 16, 64)
if err != nil {
return time.Unix(0, 0), err
}
return time.Unix(timestamp, 0), nil
}

44
version.go
View File

@ -24,10 +24,14 @@ package main
import (
"bazil.org/fuse/fs"
"errors"
"fmt"
"io/ioutil"
"os"
"path"
"path/filepath"
"regexp"
"strconv"
"strings"
"time"
)
@ -163,3 +167,43 @@ func (this *version) dumpRoot() {
func (this *version) Root() (fs.Node, error) {
return this.root, nil
}
//
// version helpers
//
func buildNewVersion(base string) error {
name := buildVerName(time.Now())
if err := os.Mkdir(path.Join(base, name), 0755); err != nil {
return err
}
if err := os.Mkdir(path.Join(base, name, "root"), 0755); err != nil {
return err
}
return nil
}
func buildVerName(timestamp time.Time) string {
return fmt.Sprintf("ver_%.16x", timestamp.Unix())
}
func parseVerName(name string) (time.Time, error) {
re, err := regexp.Compile(`ver_([0-9a-f]+)$`)
if err != nil {
return time.Unix(0, 0), err
}
matches := re.FindStringSubmatch(name)
if len(matches) < 2 {
return time.Unix(0, 0), errors.New("invalid version identifier")
}
timestamp, err := strconv.ParseInt(matches[1], 16, 64)
if err != nil {
return time.Unix(0, 0), err
}
return time.Unix(timestamp, 0), nil
}