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package commands
import (
"fmt"
"io"
"github.com/ipfs/go-ipfs/core"
"github.com/ipfs/go-ipfs/core/commands/cmdenv"
tar "github.com/ipfs/go-ipfs/tar"
dag "gx/ipfs/QmPJNbVw8o3ohC43ppSXyNXwYKsWShG4zygnirHptfbHri/go-merkledag"
"gx/ipfs/QmQAgv6Gaoe2tQpcabqwKXKChp2MZ7i3UXv9DqTTaxCaTR/go-path"
"gx/ipfs/QmQkW9fnCsg9SLHdViiAh6qfBppodsPZVpU92dZLqYtEfs/go-ipfs-cmds"
"gx/ipfs/Qmde5VP1qUkyQXKCfmEUA7bP64V2HAptbJ7phuPp7jXWwg/go-ipfs-cmdkit"
)
var TarCmd = &cmds.Command{
Helptext: cmdkit.HelpText{
Tagline: "Utility functions for tar files in ipfs.",
},
Subcommands: map[string]*cmds.Command{
"add": tarAddCmd,
"cat": tarCatCmd,
},
}
var tarAddCmd = &cmds.Command{
Helptext: cmdkit.HelpText{
Tagline: "Import a tar file into ipfs.",
ShortDescription: `
'ipfs tar add' will parse a tar file and create a merkledag structure to
represent it.
`,
},
Arguments: []cmdkit.Argument{
cmdkit.FileArg("file", true, false, "Tar file to add.").EnableStdin(),
},
Run: func(req *cmds.Request, res cmds.ResponseEmitter, env cmds.Environment) error {
nd, err := cmdenv.GetNode(env)
if err != nil {
return err
}
enc, err := cmdenv.GetCidEncoder(req)
if err != nil {
return err
}
it := req.Files.Entries()
file, err := cmdenv.GetFileArg(it)
if err != nil {
return err
}
node, err := tar.ImportTar(req.Context, file, nd.DAG)
if err != nil {
return err
}
c := node.Cid()
return cmds.EmitOnce(res, &AddEvent{
Name: it.Name(),
Hash: enc.Encode(c),
})
},
Type: AddEvent{},
Encoders: cmds.EncoderMap{
cmds.Text: cmds.MakeTypedEncoder(func(req *cmds.Request, w io.Writer, out *AddEvent) error {
fmt.Fprintln(w, out.Hash)
return nil
}),
},
}
var tarCatCmd = &cmds.Command{
Helptext: cmdkit.HelpText{
Tagline: "Export a tar file from IPFS.",
ShortDescription: `
'ipfs tar cat' will export a tar file from a previously imported one in IPFS.
`,
},
Arguments: []cmdkit.Argument{
cmdkit.StringArg("path", true, false, "ipfs path of archive to export.").EnableStdin(),
},
Run: func(req *cmds.Request, res cmds.ResponseEmitter, env cmds.Environment) error {
nd, err := cmdenv.GetNode(env)
if err != nil {
return err
}
p, err := path.ParsePath(req.Arguments[0])
if err != nil {
return err
}
root, err := core.Resolve(req.Context, nd.Namesys, nd.Resolver, p)
if err != nil {
return err
}
rootpb, ok := root.(*dag.ProtoNode)
if !ok {
return dag.ErrNotProtobuf
}
r, err := tar.ExportTar(req.Context, rootpb, nd.DAG)
if err != nil {
return err
}
return res.Emit(r)
},
}
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