syncthing/model/util.go

112 lines
2.6 KiB
Go

package model
import (
"fmt"
"os"
"path/filepath"
"runtime"
"github.com/calmh/syncthing/protocol"
"github.com/calmh/syncthing/scanner"
)
func Rename(from, to string) error {
if runtime.GOOS == "windows" {
os.Chmod(to, 0666) // Make sure the file is user writeable
err := os.Remove(to)
if err != nil && !os.IsNotExist(err) {
l.Warnln(err)
}
}
defer os.Remove(from) // Don't leave a dangling temp file in case of rename error
return os.Rename(from, to)
}
func fileFromFileInfo(f protocol.FileInfo) scanner.File {
var blocks = make([]scanner.Block, len(f.Blocks))
var offset int64
for i, b := range f.Blocks {
blocks[i] = scanner.Block{
Offset: offset,
Size: b.Size,
Hash: b.Hash,
}
offset += int64(b.Size)
}
return scanner.File{
// Name is with native separator and normalization
Name: filepath.FromSlash(f.Name),
Size: offset,
Flags: f.Flags &^ protocol.FlagInvalid,
Modified: f.Modified,
Version: f.Version,
Blocks: blocks,
Suppressed: f.Flags&protocol.FlagInvalid != 0,
}
}
func fileInfoFromFile(f scanner.File) protocol.FileInfo {
var blocks = make([]protocol.BlockInfo, len(f.Blocks))
for i, b := range f.Blocks {
blocks[i] = protocol.BlockInfo{
Size: b.Size,
Hash: b.Hash,
}
}
pf := protocol.FileInfo{
Name: filepath.ToSlash(f.Name),
Flags: f.Flags,
Modified: f.Modified,
Version: f.Version,
Blocks: blocks,
}
if f.Suppressed {
pf.Flags |= protocol.FlagInvalid
}
return pf
}
func cmMap(cm protocol.ClusterConfigMessage) map[string]map[string]uint32 {
m := make(map[string]map[string]uint32)
for _, repo := range cm.Repositories {
m[repo.ID] = make(map[string]uint32)
for _, node := range repo.Nodes {
m[repo.ID][node.ID] = node.Flags
}
}
return m
}
type ClusterConfigMismatch error
// compareClusterConfig returns nil for two equivalent configurations,
// otherwise a decriptive error
func compareClusterConfig(local, remote protocol.ClusterConfigMessage) error {
lm := cmMap(local)
rm := cmMap(remote)
for repo, lnodes := range lm {
_ = lnodes
if rnodes, ok := rm[repo]; ok {
for node, lflags := range lnodes {
if rflags, ok := rnodes[node]; ok {
if lflags&protocol.FlagShareBits != rflags&protocol.FlagShareBits {
return ClusterConfigMismatch(fmt.Errorf("remote has different sharing flags for node %q in repository %q", node, repo))
}
}
}
} else {
return ClusterConfigMismatch(fmt.Errorf("remote is missing repository %q", repo))
}
}
for repo := range rm {
if _, ok := lm[repo]; !ok {
return ClusterConfigMismatch(fmt.Errorf("remote has extra repository %q", repo))
}
}
return nil
}