forked from minio/mc
/
cp-main.go
236 lines (200 loc) · 6.29 KB
/
cp-main.go
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/*
* Minio Client (C) 2014, 2015 Minio, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package main
import (
"bufio"
"encoding/json"
"fmt"
"io"
"math"
"os"
"runtime"
"strings"
"sync"
"github.com/minio/cli"
"github.com/minio/mc/pkg/console"
"github.com/minio/minio/pkg/iodine"
)
// Help message.
var cpCmd = cli.Command{
Name: "cp",
Usage: "Copy files and folders from many sources to a single destination",
Action: runCopyCmd,
CustomHelpTemplate: `NAME:
mc {{.Name}} - {{.Usage}}
USAGE:
mc {{.Name}}{{if .Flags}} [ARGS...]{{end}} SOURCE [SOURCE...] TARGET {{if .Description}}
DESCRIPTION:
{{.Description}}{{end}}{{if .Flags}}
FLAGS:
{{range .Flags}}{{.}}
{{end}}{{ end }}
EXAMPLES:
1. Copy list of objects from local file system to Amazon S3 object storage.
$ mc {{.Name}} Music/*.ogg https://s3.amazonaws.com/jukebox/
2. Copy a bucket recursively from Minio object storage to Amazon S3 object storage.
$ mc {{.Name}} https://play.minio.io:9000/photos/burningman2011... https://s3.amazonaws.com/private-photos/burningman/
3. Copy multiple local folders recursively to Minio object storage.
$ mc {{.Name}} backup/2014/... backup/2015/... https://play.minio.io:9000/archive/
4. Copy a bucket recursively from aliased Amazon S3 object storage to local filesystem on Windows.
$ mc {{.Name}} s3:documents/2014/... C:\backup\2014
5. Copy an object of non english characters to Amazon S3 object storage.
$ mc {{.Name}} 本語 s3:andoria/本語
`,
}
// doCopy - Copy a singe file from source to destination
func doCopy(cpURLs copyURLs, bar *barSend, cpQueue chan bool, wg *sync.WaitGroup) error {
defer wg.Done() // Notify that this copy routine is done.
defer func() {
<-cpQueue
}()
if !globalQuietFlag || !globalJSONFlag {
bar.SetCaption(cpURLs.SourceContent.Name + ": ")
}
reader, length, err := getSource(cpURLs.SourceContent.Name)
if err != nil {
if !globalQuietFlag || !globalJSONFlag {
bar.ErrorGet(length)
}
return NewIodine(iodine.New(err, map[string]string{"URL": cpURLs.SourceContent.Name}))
}
var newReader io.ReadCloser
if globalQuietFlag || globalJSONFlag {
console.PrintC(CopyMessage{
Source: cpURLs.SourceContent.Name,
Target: cpURLs.TargetContent.Name,
Length: cpURLs.SourceContent.Size,
})
newReader = reader
} else {
// set up progress
newReader = bar.NewProxyReader(reader)
}
defer newReader.Close()
err = putTarget(cpURLs.TargetContent.Name, length, newReader)
if err != nil {
if !globalQuietFlag || !globalJSONFlag {
bar.ErrorPut(length)
}
console.Println("")
console.Errorln(NewIodine(err))
}
return nil
}
// doCopyFake - Perform a fake copy to update the progress bar appropriately.
func doCopyFake(sURLs copyURLs, bar *barSend) (err error) {
if !globalQuietFlag || !globalJSONFlag {
bar.Progress(sURLs.SourceContent.Size)
}
return nil
}
// doPrepareCopyURLs scans the source URL and prepares a list of objects for copying.
func doPrepareCopyURLs(session *sessionV2, trapCh <-chan bool) {
// Separate source and target. 'cp' can take only one target,
// but any number of sources, even the recursive URLs mixed in-between.
sourceURLs := session.Header.CommandArgs[:len(session.Header.CommandArgs)-1]
targetURL := session.Header.CommandArgs[len(session.Header.CommandArgs)-1] // Last one is target
var totalBytes int64
var totalObjects int
// Create a session data file to store the processed URLs.
dataFP := session.NewDataWriter()
scanBar := scanBarFactory(strings.Join(sourceURLs, " "))
URLsCh := prepareCopyURLs(sourceURLs, targetURL)
done := false
for done == false {
select {
case cpURLs, ok := <-URLsCh:
if !ok { // Done with URL prepration
done = true
break
}
if cpURLs.Error != nil {
console.Errorln(cpURLs.Error)
break
}
jsonData, err := json.Marshal(cpURLs)
if err != nil {
session.Close()
console.Fatalf("Unable to marshal URLs to JSON. %s\n", err)
}
fmt.Fprintln(dataFP, string(jsonData))
scanBar(cpURLs.SourceContent.Name)
totalBytes += cpURLs.SourceContent.Size
totalObjects++
case <-trapCh:
session.Close() // If we are interrupted during the URL scanning, we drop the session.
os.Exit(0)
}
}
session.Header.TotalBytes = totalBytes
session.Header.TotalObjects = totalObjects
session.Save()
}
func doCopyCmdSession(session *sessionV2) {
trapCh := signalTrap(os.Interrupt, os.Kill)
if !session.HasData() {
doPrepareCopyURLs(session, trapCh)
}
wg := new(sync.WaitGroup)
cpQueue := make(chan bool, int(math.Max(float64(runtime.NumCPU())-1, 1)))
scanner := bufio.NewScanner(session.NewDataReader())
isCopied := isCopiedFactory(session.Header.LastCopied)
var bar barSend
if !globalQuietFlag || !globalJSONFlag { // set up progress bar
bar = newCpBar()
defer bar.Finish()
bar.Extend(session.Header.TotalBytes)
}
for scanner.Scan() {
var cpURLs copyURLs
json.Unmarshal([]byte(scanner.Text()), &cpURLs)
if isCopied(cpURLs.SourceContent.Name) {
doCopyFake(cpURLs, &bar)
} else {
select {
case cpQueue <- true:
wg.Add(1)
go doCopy(cpURLs, &bar, cpQueue, wg)
session.Header.LastCopied = cpURLs.SourceContent.Name
case <-trapCh:
session.Save()
session.Info()
os.Exit(0)
}
}
}
wg.Wait()
}
// runCopyCmd is bound to sub-command
func runCopyCmd(ctx *cli.Context) {
checkCopySyntax(ctx)
session := newSessionV2()
defer session.Close()
var err error
session.Header.CommandType = "cp"
session.Header.RootPath, err = os.Getwd()
if err != nil {
session.Close()
console.Fatalf("Unable to get current working directory. %s\n", err)
}
// extract URLs.
session.Header.CommandArgs, err = args2URLs(ctx.Args())
if err != nil {
session.Close()
console.Fatalf("One or more unknown URL types found %s. %s\n", ctx.Args(), err)
}
doCopyCmdSession(session)
}