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add.go
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add.go
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package commands
import (
"fmt"
"io"
"path"
"strings"
"github.com/ipfs/go-ipfs/Godeps/_workspace/src/github.com/cheggaaa/pb"
cmds "github.com/ipfs/go-ipfs/commands"
files "github.com/ipfs/go-ipfs/commands/files"
core "github.com/ipfs/go-ipfs/core"
coreunix "github.com/ipfs/go-ipfs/core/coreunix"
importer "github.com/ipfs/go-ipfs/importer"
"github.com/ipfs/go-ipfs/importer/chunk"
dag "github.com/ipfs/go-ipfs/merkledag"
pin "github.com/ipfs/go-ipfs/pin"
ft "github.com/ipfs/go-ipfs/unixfs"
u "github.com/ipfs/go-ipfs/util"
)
// Error indicating the max depth has been exceded.
var ErrDepthLimitExceeded = fmt.Errorf("depth limit exceeded")
// how many bytes of progress to wait before sending a progress update message
const progressReaderIncrement = 1024 * 256
const (
progressOptionName = "progress"
wrapOptionName = "wrap-with-directory"
)
type AddedObject struct {
Name string
Hash string `json:",omitempty"`
Bytes int64 `json:",omitempty"`
}
var AddCmd = &cmds.Command{
Helptext: cmds.HelpText{
Tagline: "Add an object to ipfs.",
ShortDescription: `
Adds contents of <path> to ipfs. Use -r to add directories.
Note that directories are added recursively, to form the ipfs
MerkleDAG. A smarter partial add with a staging area (like git)
remains to be implemented.
`,
},
Arguments: []cmds.Argument{
cmds.FileArg("path", true, true, "The path to a file to be added to IPFS").EnableRecursive().EnableStdin(),
},
Options: []cmds.Option{
cmds.OptionRecursivePath, // a builtin option that allows recursive paths (-r, --recursive)
cmds.BoolOption("quiet", "q", "Write minimal output"),
cmds.BoolOption(progressOptionName, "p", "Stream progress data"),
cmds.BoolOption(wrapOptionName, "w", "Wrap files with a directory object"),
cmds.BoolOption("t", "trickle", "Use trickle-dag format for dag generation"),
},
PreRun: func(req cmds.Request) error {
if quiet, _, _ := req.Option("quiet").Bool(); quiet {
return nil
}
req.SetOption(progressOptionName, true)
sizeFile, ok := req.Files().(files.SizeFile)
if !ok {
// we don't need to error, the progress bar just won't know how big the files are
return nil
}
size, err := sizeFile.Size()
if err != nil {
// see comment above
return nil
}
log.Debugf("Total size of file being added: %v\n", size)
req.Values()["size"] = size
return nil
},
Run: func(req cmds.Request, res cmds.Response) {
n, err := req.Context().GetNode()
if err != nil {
res.SetError(err, cmds.ErrNormal)
return
}
progress, _, _ := req.Option(progressOptionName).Bool()
wrap, _, _ := req.Option(wrapOptionName).Bool()
outChan := make(chan interface{}, 8)
res.SetOutput((<-chan interface{})(outChan))
go func() {
defer close(outChan)
for {
file, err := req.Files().NextFile()
if err != nil && err != io.EOF {
res.SetError(err, cmds.ErrNormal)
return
}
if file == nil { // done
return
}
rootnd, err := addFile(n, file, outChan, progress, wrap)
if err != nil {
res.SetError(err, cmds.ErrNormal)
return
}
rnk, err := rootnd.Key()
if err != nil {
res.SetError(err, cmds.ErrNormal)
return
}
mp := n.Pinning.GetManual()
mp.RemovePinWithMode(rnk, pin.Indirect)
mp.PinWithMode(rnk, pin.Recursive)
err = n.Pinning.Flush()
if err != nil {
res.SetError(err, cmds.ErrNormal)
return
}
}
}()
},
PostRun: func(req cmds.Request, res cmds.Response) {
if res.Error() != nil {
return
}
outChan, ok := res.Output().(<-chan interface{})
if !ok {
res.SetError(u.ErrCast(), cmds.ErrNormal)
return
}
res.SetOutput(nil)
quiet, _, err := req.Option("quiet").Bool()
if err != nil {
res.SetError(u.ErrCast(), cmds.ErrNormal)
return
}
size := int64(0)
s, found := req.Values()["size"]
if found {
size = s.(int64)
}
showProgressBar := !quiet && size >= progressBarMinSize
var bar *pb.ProgressBar
var terminalWidth int
if showProgressBar {
bar = pb.New64(size).SetUnits(pb.U_BYTES)
bar.ManualUpdate = true
bar.Start()
// the progress bar lib doesn't give us a way to get the width of the output,
// so as a hack we just use a callback to measure the output, then git rid of it
terminalWidth = 0
bar.Callback = func(line string) {
terminalWidth = len(line)
bar.Callback = nil
bar.Output = res.Stderr()
log.Infof("terminal width: %v\n", terminalWidth)
}
bar.Update()
}
lastFile := ""
var totalProgress, prevFiles, lastBytes int64
for out := range outChan {
output := out.(*AddedObject)
if len(output.Hash) > 0 {
if showProgressBar {
// clear progress bar line before we print "added x" output
fmt.Fprintf(res.Stderr(), "\r%s\r", strings.Repeat(" ", terminalWidth))
}
if quiet {
fmt.Fprintf(res.Stdout(), "%s\n", output.Hash)
} else {
fmt.Fprintf(res.Stdout(), "added %s %s\n", output.Hash, output.Name)
}
} else {
log.Debugf("add progress: %v %v\n", output.Name, output.Bytes)
if !showProgressBar {
continue
}
if len(lastFile) == 0 {
lastFile = output.Name
}
if output.Name != lastFile || output.Bytes < lastBytes {
prevFiles += lastBytes
lastFile = output.Name
}
lastBytes = output.Bytes
delta := prevFiles + lastBytes - totalProgress
totalProgress = bar.Add64(delta)
}
if showProgressBar {
bar.Update()
}
}
},
Type: AddedObject{},
}
func add(n *core.IpfsNode, reader io.Reader) (*dag.Node, error) {
node, err := importer.BuildDagFromReader(
reader,
n.DAG,
chunk.DefaultSplitter,
importer.PinIndirectCB(n.Pinning.GetManual()),
)
if err != nil {
return nil, err
}
return node, nil
}
func addFile(n *core.IpfsNode, file files.File, out chan interface{}, progress bool, wrap bool) (*dag.Node, error) {
if file.IsDirectory() {
return addDir(n, file, out, progress)
}
// if the progress flag was specified, wrap the file so that we can send
// progress updates to the client (over the output channel)
var reader io.Reader = file
if progress {
reader = &progressReader{file: file, out: out}
}
if wrap {
p, dagnode, err := coreunix.AddWrapped(n, reader, path.Base(file.FileName()))
if err != nil {
return nil, err
}
out <- &AddedObject{
Hash: p,
Name: file.FileName(),
}
return dagnode, nil
}
dagnode, err := add(n, reader)
if err != nil {
return nil, err
}
log.Infof("adding file: %s", file.FileName())
if err := outputDagnode(out, file.FileName(), dagnode); err != nil {
return nil, err
}
return dagnode, nil
}
func addDir(n *core.IpfsNode, dir files.File, out chan interface{}, progress bool) (*dag.Node, error) {
log.Infof("adding directory: %s", dir.FileName())
tree := &dag.Node{Data: ft.FolderPBData()}
for {
file, err := dir.NextFile()
if err != nil && err != io.EOF {
return nil, err
}
if file == nil {
break
}
node, err := addFile(n, file, out, progress, false)
if err != nil {
return nil, err
}
_, name := path.Split(file.FileName())
err = tree.AddNodeLink(name, node)
if err != nil {
return nil, err
}
}
err := outputDagnode(out, dir.FileName(), tree)
if err != nil {
return nil, err
}
k, err := n.DAG.Add(tree)
if err != nil {
return nil, err
}
n.Pinning.GetManual().PinWithMode(k, pin.Indirect)
return tree, nil
}
// outputDagnode sends dagnode info over the output channel
func outputDagnode(out chan interface{}, name string, dn *dag.Node) error {
o, err := getOutput(dn)
if err != nil {
return err
}
out <- &AddedObject{
Hash: o.Hash,
Name: name,
}
return nil
}
type progressReader struct {
file files.File
out chan interface{}
bytes int64
lastProgress int64
}
func (i *progressReader) Read(p []byte) (int, error) {
n, err := i.file.Read(p)
i.bytes += int64(n)
if i.bytes-i.lastProgress >= progressReaderIncrement || err == io.EOF {
i.lastProgress = i.bytes
i.out <- &AddedObject{
Name: i.file.FileName(),
Bytes: i.bytes,
}
}
return n, err
}