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package client
import (
"fmt"
"io"
"strings"
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"github.com/docker/docker/api/types"
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"github.com/docker/docker/pkg/archive"
flag "github.com/docker/docker/pkg/mflag"
)
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// CmdCp copies files/folders from a path on the container to a directory on the host running the command.
//
// If HOSTDIR is '-', the data is written as a tar file to STDOUT.
//
// Usage: docker cp CONTAINER:PATH HOSTDIR
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func ( cli * DockerCli ) CmdCp ( args ... string ) error {
cmd := cli . Subcmd ( "cp" , "CONTAINER:PATH HOSTDIR|-" , "Copy files/folders from a PATH on the container to a HOSTDIR on the host\nrunning the command. Use '-' to write the data\nas a tar file to STDOUT." , true )
cmd . Require ( flag . Exact , 2 )
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cmd . ParseFlags ( args , true )
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// deal with path name with `:`
info := strings . SplitN ( cmd . Arg ( 0 ) , ":" , 2 )
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if len ( info ) != 2 {
return fmt . Errorf ( "Error: Path not specified" )
}
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cfg := & types . CopyConfig {
Resource : info [ 1 ] ,
}
stream , statusCode , err := cli . call ( "POST" , "/containers/" + info [ 0 ] + "/copy" , cfg , nil )
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if stream != nil {
defer stream . Close ( )
}
if statusCode == 404 {
return fmt . Errorf ( "No such container: %v" , info [ 0 ] )
}
if err != nil {
return err
}
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hostPath := cmd . Arg ( 1 )
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if statusCode == 200 {
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if hostPath == "-" {
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_ , err = io . Copy ( cli . out , stream )
} else {
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err = archive . Untar ( stream , hostPath , & archive . TarOptions { NoLchown : true } )
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}
if err != nil {
return err
}
}
return nil
}