mirror of
https://github.com/rclone/rclone.git
synced 2024-11-07 17:14:44 +01:00
311 lines
7.0 KiB
Go
311 lines
7.0 KiB
Go
// Package bisync implements bisync
|
|
// Copyright (c) 2017-2020 Chris Nelson
|
|
package bisync
|
|
|
|
import (
|
|
"context"
|
|
"path/filepath"
|
|
"sort"
|
|
|
|
"github.com/pkg/errors"
|
|
"github.com/rclone/rclone/cmd/bisync/bilib"
|
|
"github.com/rclone/rclone/fs"
|
|
"github.com/rclone/rclone/fs/operations"
|
|
)
|
|
|
|
// delta
|
|
type delta uint8
|
|
|
|
const (
|
|
deltaZero delta = 0
|
|
deltaNew delta = 1 << iota
|
|
deltaNewer
|
|
deltaOlder
|
|
deltaSize
|
|
deltaHash
|
|
deltaDeleted
|
|
)
|
|
|
|
const (
|
|
deltaModified delta = deltaNewer | deltaOlder | deltaSize | deltaHash | deltaDeleted
|
|
deltaOther delta = deltaNew | deltaNewer | deltaOlder
|
|
)
|
|
|
|
func (d delta) is(cond delta) bool {
|
|
return d&cond != 0
|
|
}
|
|
|
|
// deltaSet
|
|
type deltaSet struct {
|
|
deltas map[string]delta
|
|
opt *Options
|
|
fs fs.Fs // base filesystem
|
|
msg string // filesystem name for logging
|
|
oldCount int // original number of files (for "excess deletes" check)
|
|
deleted int // number of deleted files (for "excess deletes" check)
|
|
foundSame bool // true if found at least one unchanged file
|
|
checkFiles bilib.Names
|
|
}
|
|
|
|
func (ds *deltaSet) empty() bool {
|
|
return len(ds.deltas) == 0
|
|
}
|
|
|
|
func (ds *deltaSet) sort() (sorted []string) {
|
|
if ds.empty() {
|
|
return
|
|
}
|
|
sorted = make([]string, 0, len(ds.deltas))
|
|
for file := range ds.deltas {
|
|
sorted = append(sorted, file)
|
|
}
|
|
sort.Strings(sorted)
|
|
return
|
|
}
|
|
|
|
func (ds *deltaSet) printStats() {
|
|
if ds.empty() {
|
|
return
|
|
}
|
|
nAll := len(ds.deltas)
|
|
nNew := 0
|
|
nNewer := 0
|
|
nOlder := 0
|
|
nDeleted := 0
|
|
for _, d := range ds.deltas {
|
|
if d.is(deltaNew) {
|
|
nNew++
|
|
}
|
|
if d.is(deltaNewer) {
|
|
nNewer++
|
|
}
|
|
if d.is(deltaOlder) {
|
|
nOlder++
|
|
}
|
|
if d.is(deltaDeleted) {
|
|
nDeleted++
|
|
}
|
|
}
|
|
fs.Infof(nil, "%s: %4d changes: %4d new, %4d newer, %4d older, %4d deleted",
|
|
ds.msg, nAll, nNew, nNewer, nOlder, nDeleted)
|
|
}
|
|
|
|
// findDeltas
|
|
func (b *bisyncRun) findDeltas(fctx context.Context, f fs.Fs, oldListing, newListing, msg string) (ds *deltaSet, err error) {
|
|
var old, now *fileList
|
|
|
|
old, err = b.loadListing(oldListing)
|
|
if err != nil {
|
|
fs.Errorf(nil, "Failed loading prior %s listing: %s", msg, oldListing)
|
|
b.abort = true
|
|
return
|
|
}
|
|
if err = b.checkListing(old, oldListing, "prior "+msg); err != nil {
|
|
return
|
|
}
|
|
|
|
now, err = b.makeListing(fctx, f, newListing)
|
|
if err == nil {
|
|
err = b.checkListing(now, newListing, "current "+msg)
|
|
}
|
|
if err != nil {
|
|
return
|
|
}
|
|
|
|
ds = &deltaSet{
|
|
deltas: map[string]delta{},
|
|
fs: f,
|
|
msg: msg,
|
|
oldCount: len(old.list),
|
|
opt: b.opt,
|
|
checkFiles: bilib.Names{},
|
|
}
|
|
|
|
for _, file := range old.list {
|
|
d := deltaZero
|
|
if !now.has(file) {
|
|
b.indent(msg, file, "File was deleted")
|
|
ds.deleted++
|
|
d |= deltaDeleted
|
|
} else {
|
|
if old.getTime(file) != now.getTime(file) {
|
|
if old.beforeOther(now, file) {
|
|
b.indent(msg, file, "File is newer")
|
|
d |= deltaNewer
|
|
} else { // Current version is older than prior sync.
|
|
b.indent(msg, file, "File is OLDER")
|
|
d |= deltaOlder
|
|
}
|
|
}
|
|
// TODO Compare sizes and hashes
|
|
}
|
|
|
|
if d.is(deltaModified) {
|
|
ds.deltas[file] = d
|
|
} else {
|
|
// Once we've found at least one unchanged file,
|
|
// we know that not everything has changed,
|
|
// as with a DST time change
|
|
ds.foundSame = true
|
|
}
|
|
}
|
|
|
|
for _, file := range now.list {
|
|
if !old.has(file) {
|
|
b.indent(msg, file, "File is new")
|
|
ds.deltas[file] = deltaNew
|
|
}
|
|
}
|
|
|
|
if b.opt.CheckAccess {
|
|
// checkFiles is a small structure compared with the `now`, so we
|
|
// return it alone and let the full delta map be garbage collected.
|
|
for _, file := range now.list {
|
|
if filepath.Base(file) == b.opt.CheckFilename {
|
|
ds.checkFiles.Add(file)
|
|
}
|
|
}
|
|
}
|
|
|
|
return
|
|
}
|
|
|
|
// applyDeltas
|
|
func (b *bisyncRun) applyDeltas(ctx context.Context, ds1, ds2 *deltaSet) (changes1, changes2 bool, err error) {
|
|
path1 := bilib.FsPath(b.fs1)
|
|
path2 := bilib.FsPath(b.fs2)
|
|
|
|
copy1to2 := bilib.Names{}
|
|
copy2to1 := bilib.Names{}
|
|
delete1 := bilib.Names{}
|
|
delete2 := bilib.Names{}
|
|
handled := bilib.Names{}
|
|
|
|
ctxMove := b.opt.setDryRun(ctx)
|
|
|
|
for _, file := range ds1.sort() {
|
|
p1 := path1 + file
|
|
p2 := path2 + file
|
|
d1 := ds1.deltas[file]
|
|
|
|
if d1.is(deltaOther) {
|
|
d2, in2 := ds2.deltas[file]
|
|
if !in2 {
|
|
b.indent("Path1", p2, "Queue copy to Path2")
|
|
copy1to2.Add(file)
|
|
} else if d2.is(deltaDeleted) {
|
|
b.indent("Path1", p2, "Queue copy to Path2")
|
|
copy1to2.Add(file)
|
|
handled.Add(file)
|
|
} else if d2.is(deltaOther) {
|
|
b.indent("!WARNING", file, "New or changed in both paths")
|
|
b.indent("!Path1", p1+"..path1", "Renaming Path1 copy")
|
|
if err = operations.MoveFile(ctxMove, b.fs1, b.fs1, file+"..path1", file); err != nil {
|
|
err = errors.Wrapf(err, "path1 rename failed for %s", p1)
|
|
b.critical = true
|
|
return
|
|
}
|
|
b.indent("!Path1", p2+"..path1", "Queue copy to Path2")
|
|
copy1to2.Add(file + "..path1")
|
|
|
|
b.indent("!Path2", p2+"..path2", "Renaming Path2 copy")
|
|
if err = operations.MoveFile(ctxMove, b.fs2, b.fs2, file+"..path2", file); err != nil {
|
|
err = errors.Wrapf(err, "path2 rename failed for %s", file)
|
|
return
|
|
}
|
|
b.indent("!Path2", p1+"..path2", "Queue copy to Path1")
|
|
copy2to1.Add(file + "..path2")
|
|
handled.Add(file)
|
|
}
|
|
} else {
|
|
// Path1 deleted
|
|
d2, in2 := ds2.deltas[file]
|
|
if !in2 {
|
|
b.indent("Path2", p2, "Queue delete")
|
|
delete2.Add(file)
|
|
} else if d2.is(deltaOther) {
|
|
b.indent("Path2", p1, "Queue copy to Path1")
|
|
copy2to1.Add(file)
|
|
handled.Add(file)
|
|
} else if d2.is(deltaDeleted) {
|
|
handled.Add(file)
|
|
}
|
|
}
|
|
}
|
|
|
|
for _, file := range ds2.sort() {
|
|
p1 := path1 + file
|
|
d2 := ds2.deltas[file]
|
|
|
|
if handled.Has(file) {
|
|
continue
|
|
}
|
|
if d2.is(deltaOther) {
|
|
b.indent("Path2", p1, "Queue copy to Path1")
|
|
copy2to1.Add(file)
|
|
} else {
|
|
// Deleted
|
|
b.indent("Path1", p1, "Queue delete")
|
|
delete1.Add(file)
|
|
}
|
|
}
|
|
|
|
// Do the batch operation
|
|
if copy2to1.NotEmpty() {
|
|
changes1 = true
|
|
b.indent("Path2", "Path1", "Do queued copies to")
|
|
err = b.fastCopy(ctx, b.fs2, b.fs1, copy2to1, "copy2to1")
|
|
if err != nil {
|
|
return
|
|
}
|
|
}
|
|
|
|
if copy1to2.NotEmpty() {
|
|
changes2 = true
|
|
b.indent("Path1", "Path2", "Do queued copies to")
|
|
err = b.fastCopy(ctx, b.fs1, b.fs2, copy1to2, "copy1to2")
|
|
if err != nil {
|
|
return
|
|
}
|
|
}
|
|
|
|
if delete1.NotEmpty() {
|
|
changes1 = true
|
|
b.indent("", "Path1", "Do queued deletes on")
|
|
err = b.fastDelete(ctx, b.fs1, delete1, "delete1")
|
|
if err != nil {
|
|
return
|
|
}
|
|
}
|
|
|
|
if delete2.NotEmpty() {
|
|
changes2 = true
|
|
b.indent("", "Path2", "Do queued deletes on")
|
|
err = b.fastDelete(ctx, b.fs2, delete2, "delete2")
|
|
if err != nil {
|
|
return
|
|
}
|
|
}
|
|
|
|
return
|
|
}
|
|
|
|
// exccessDeletes checks whether number of deletes is within allowed range
|
|
func (ds *deltaSet) excessDeletes() bool {
|
|
maxDelete := ds.opt.MaxDelete
|
|
maxRatio := float64(maxDelete) / 100.0
|
|
curRatio := 0.0
|
|
if ds.deleted > 0 && ds.oldCount > 0 {
|
|
curRatio = float64(ds.deleted) / float64(ds.oldCount)
|
|
}
|
|
|
|
if curRatio <= maxRatio {
|
|
return false
|
|
}
|
|
|
|
fs.Errorf("Safety abort",
|
|
"too many deletes (>%d%%, %d of %d) on %s %s. Run with --force if desired.",
|
|
maxDelete, ds.deleted, ds.oldCount, ds.msg, quotePath(bilib.FsPath(ds.fs)))
|
|
return true
|
|
}
|