commands: switch object commands to CoreAPI

License: MIT
Signed-off-by: Łukasz Magiera <magik6k@gmail.com>

core/commands/env.go

@@ -5,6 +5,7 @@ import (
 
 	"github.com/ipfs/go-ipfs/commands"
 	"github.com/ipfs/go-ipfs/core"
+	coreiface "github.com/ipfs/go-ipfs/core/coreapi/interface"
 	"github.com/ipfs/go-ipfs/repo/config"
 )
 
@@ -18,6 +19,16 @@ func GetNode(env interface{}) (*core.IpfsNode, error) {
 	return ctx.GetNode()
 }
 
+// GetApi extracts CoreAPI instance from the environment.
+func GetApi(env interface{}) (coreiface.CoreAPI, error) {
+	ctx, ok := env.(*commands.Context)
+	if !ok {
+		return nil, fmt.Errorf("expected env to be of type %T, got %T", ctx, env)
+	}
+
+	return ctx.GetApi()
+}
+
 // GetConfig extracts the config from the environment.
 func GetConfig(env interface{}) (*config.Config, error) {
 	ctx, ok := env.(*commands.Context)

core/commands/object/diff.go

@@ -6,10 +6,10 @@ import (
 	"io"
 
 	cmds "github.com/ipfs/go-ipfs/commands"
-	core "github.com/ipfs/go-ipfs/core"
 	e "github.com/ipfs/go-ipfs/core/commands/e"
+	coreiface "github.com/ipfs/go-ipfs/core/coreapi/interface"
 	"github.com/ipfs/go-ipfs/dagutils"
-	path "gx/ipfs/QmYKNMEUK7nCVAefgXF1LVtZEZg3uRmBqiae4FJRXDNAyJ/go-path"
+
 	cmdkit "gx/ipfs/QmdE4gMduCKCGAcczM2F5ioYDfdeKuPix138wrES1YSr7f/go-ipfs-cmdkit"
 )
 
@@ -52,7 +52,7 @@ Example:
 		cmdkit.BoolOption("verbose", "v", "Print extra information."),
 	},
 	Run: func(req cmds.Request, res cmds.Response) {
-		node, err := req.InvocContext().GetNode()
+		api, err := req.InvocContext().GetApi()
 		if err != nil {
 			res.SetError(err, cmdkit.ErrNormal)
 			return
@@ -61,39 +61,37 @@ Example:
 		a := req.Arguments()[0]
 		b := req.Arguments()[1]
 
-		pa, err := path.ParsePath(a)
+		pa, err := coreiface.ParsePath(a)
 		if err != nil {
 			res.SetError(err, cmdkit.ErrNormal)
 			return
 		}
 
-		pb, err := path.ParsePath(b)
+		pb, err := coreiface.ParsePath(b)
 		if err != nil {
 			res.SetError(err, cmdkit.ErrNormal)
 			return
 		}
 
-		ctx := req.Context()
+		changes, err := api.Object().Diff(req.Context(), pa, pb)
 
-		obj_a, err := core.Resolve(ctx, node.Namesys, node.Resolver, pa)
-		if err != nil {
-			res.SetError(err, cmdkit.ErrNormal)
-			return
+		out := make([]*dagutils.Change, len(changes))
+		for i, change := range changes {
+			out[i] = &dagutils.Change{
+				Type: change.Type,
+				Path: change.Path,
 			}
 
-		obj_b, err := core.Resolve(ctx, node.Namesys, node.Resolver, pb)
-		if err != nil {
-			res.SetError(err, cmdkit.ErrNormal)
-			return
+			if change.Before != nil {
+				out[i].Before = change.Before.Cid()
 			}
 
-		changes, err := dagutils.Diff(ctx, node.DAG, obj_a, obj_b)
-		if err != nil {
-			res.SetError(err, cmdkit.ErrNormal)
-			return
+			if change.After != nil {
+				out[i].After = change.After.Cid()
+			}
 		}
 
-		res.SetOutput(&Changes{changes})
+		res.SetOutput(&Changes{out})
 	},
 	Type: Changes{},
 	Marshalers: cmds.MarshalerMap{

core/commands/object/patch.go

@@ -3,25 +3,18 @@ package objectcmd
 import (
 	"fmt"
 	"io"
-	"io/ioutil"
 	"strings"
 
 	oldcmds "github.com/ipfs/go-ipfs/commands"
 	lgc "github.com/ipfs/go-ipfs/commands/legacy"
-	core "github.com/ipfs/go-ipfs/core"
 	e "github.com/ipfs/go-ipfs/core/commands/e"
-	"github.com/ipfs/go-ipfs/dagutils"
-	dag "gx/ipfs/QmRy4Qk9hbgFX9NGJRm8rBThrA8PZhNCitMgeRYyZ67s59/go-merkledag"
-	ft "gx/ipfs/QmSaz8Qg77gGqvDvLKeSAY7ivDEnramSWF6T7TcRwFpHtP/go-unixfs"
-	path "gx/ipfs/QmYKNMEUK7nCVAefgXF1LVtZEZg3uRmBqiae4FJRXDNAyJ/go-path"
+	coreiface "github.com/ipfs/go-ipfs/core/coreapi/interface"
+	"github.com/ipfs/go-ipfs/core/coreapi/interface/options"
 
 	cmds "gx/ipfs/QmNueRyPRQiV7PUEpnP4GgGLuK1rKQLaRW7sfPvUetYig1/go-ipfs-cmds"
-	logging "gx/ipfs/QmcVVHfdyv15GVPk7NrxdWjh2hLVccXnoD8j2tyQShiXJb/go-log"
 	cmdkit "gx/ipfs/QmdE4gMduCKCGAcczM2F5ioYDfdeKuPix138wrES1YSr7f/go-ipfs-cmdkit"
 )
 
-var log = logging.Logger("core/commands/object")
-
 var ObjectPatchCmd = &cmds.Command{
 	Helptext: cmdkit.HelpText{
 		Tagline: "Create a new merkledag object based on an existing one.",
@@ -74,51 +67,31 @@ the limit will not be respected by the network.
 		cmdkit.FileArg("data", true, false, "Data to append.").EnableStdin(),
 	},
 	Run: func(req *cmds.Request, re cmds.ResponseEmitter, env cmds.Environment) {
-		nd, err := GetNode(env)
-		if err != nil {
-			re.SetError(err, cmdkit.ErrNormal)
-			return
-		}
-
-		root, err := path.ParsePath(req.Arguments[0])
+		api, err := GetApi(env)
 		if err != nil {
 			re.SetError(err, cmdkit.ErrNormal)
 			return
 		}
 
-		rootnd, err := core.Resolve(req.Context, nd.Namesys, nd.Resolver, root)
+		root, err := coreiface.ParsePath(req.Arguments[0])
 		if err != nil {
 			re.SetError(err, cmdkit.ErrNormal)
 			return
 		}
 
-		rtpb, ok := rootnd.(*dag.ProtoNode)
-		if !ok {
-			re.SetError(dag.ErrNotProtobuf, cmdkit.ErrNormal)
-			return
-		}
-
-		fi, err := req.Files.NextFile()
+		data, err := req.Files.NextFile()
 		if err != nil {
 			re.SetError(err, cmdkit.ErrNormal)
 			return
 		}
 
-		data, err := ioutil.ReadAll(fi)
+		p, err := api.Object().AppendData(req.Context, root, data)
 		if err != nil {
 			re.SetError(err, cmdkit.ErrNormal)
 			return
 		}
 
-		rtpb.SetData(append(rtpb.Data(), data...))
-
-		err = nd.DAG.Add(req.Context, rtpb)
-		if err != nil {
-			re.SetError(err, cmdkit.ErrNormal)
-			return
-		}
-
-		cmds.EmitOnce(re, &Object{Hash: rtpb.Cid().String()})
+		cmds.EmitOnce(re, &Object{Hash: p.Cid().String()})
 	},
 	Type: Object{},
 	Encoders: cmds.EncoderMap{
@@ -145,51 +118,27 @@ Example:
 		cmdkit.FileArg("data", true, false, "The data to set the object to.").EnableStdin(),
 	},
 	Run: func(req oldcmds.Request, res oldcmds.Response) {
-		nd, err := req.InvocContext().GetNode()
-		if err != nil {
-			res.SetError(err, cmdkit.ErrNormal)
-			return
-		}
-
-		rp, err := path.ParsePath(req.StringArguments()[0])
-		if err != nil {
-			res.SetError(err, cmdkit.ErrNormal)
-			return
-		}
-
-		root, err := core.Resolve(req.Context(), nd.Namesys, nd.Resolver, rp)
-		if err != nil {
-			res.SetError(err, cmdkit.ErrNormal)
-			return
-		}
+		api, err := req.InvocContext().GetApi()
 
-		rtpb, ok := root.(*dag.ProtoNode)
-		if !ok {
-			res.SetError(dag.ErrNotProtobuf, cmdkit.ErrNormal)
-			return
-		}
-
-		fi, err := req.Files().NextFile()
+		root, err := coreiface.ParsePath(req.StringArguments()[0])
 		if err != nil {
 			res.SetError(err, cmdkit.ErrNormal)
 			return
 		}
 
-		data, err := ioutil.ReadAll(fi)
+		data, err := req.Files().NextFile()
 		if err != nil {
 			res.SetError(err, cmdkit.ErrNormal)
 			return
 		}
 
-		rtpb.SetData(data)
-
-		err = nd.DAG.Add(req.Context(), rtpb)
+		p, err := api.Object().SetData(req.Context(), root, data)
 		if err != nil {
 			res.SetError(err, cmdkit.ErrNormal)
 			return
 		}
 
-		res.SetOutput(&Object{Hash: rtpb.Cid().String()})
+		res.SetOutput(&Object{Hash: p.Cid().String()})
 	},
 	Type: Object{},
 	Marshalers: oldcmds.MarshalerMap{
@@ -209,49 +158,26 @@ Removes a link by the given name from root.
 		cmdkit.StringArg("link", true, false, "Name of the link to remove."),
 	},
 	Run: func(req oldcmds.Request, res oldcmds.Response) {
-		nd, err := req.InvocContext().GetNode()
-		if err != nil {
-			res.SetError(err, cmdkit.ErrNormal)
-			return
-		}
-
-		rootp, err := path.ParsePath(req.Arguments()[0])
+		api, err := req.InvocContext().GetApi()
 		if err != nil {
 			res.SetError(err, cmdkit.ErrNormal)
 			return
 		}
 
-		root, err := core.Resolve(req.Context(), nd.Namesys, nd.Resolver, rootp)
+		root, err := coreiface.ParsePath(req.Arguments()[0])
 		if err != nil {
 			res.SetError(err, cmdkit.ErrNormal)
 			return
 		}
 
-		rtpb, ok := root.(*dag.ProtoNode)
-		if !ok {
-			res.SetError(dag.ErrNotProtobuf, cmdkit.ErrNormal)
-			return
-		}
-
-		path := req.Arguments()[1]
-
-		e := dagutils.NewDagEditor(rtpb, nd.DAG)
-
-		err = e.RmLink(req.Context(), path)
+		link := req.Arguments()[1]
+		p, err := api.Object().RmLink(req.Context(), root, link)
 		if err != nil {
 			res.SetError(err, cmdkit.ErrNormal)
 			return
 		}
 
-		nnode, err := e.Finalize(req.Context(), nd.DAG)
-		if err != nil {
-			res.SetError(err, cmdkit.ErrNormal)
-			return
-		}
-
-		nc := nnode.Cid()
-
-		res.SetOutput(&Object{Hash: nc.String()})
+		res.SetOutput(&Object{Hash: p.Cid().String()})
 	},
 	Type: Object{},
 	Marshalers: oldcmds.MarshalerMap{
@@ -284,32 +210,21 @@ to a file containing 'bar', and returns the hash of the new object.
 		cmdkit.BoolOption("create", "p", "Create intermediary nodes."),
 	},
 	Run: func(req oldcmds.Request, res oldcmds.Response) {
-		nd, err := req.InvocContext().GetNode()
+		api, err := req.InvocContext().GetApi()
 		if err != nil {
 			res.SetError(err, cmdkit.ErrNormal)
 			return
 		}
 
-		rootp, err := path.ParsePath(req.Arguments()[0])
+		root, err := coreiface.ParsePath(req.Arguments()[0])
 		if err != nil {
 			res.SetError(err, cmdkit.ErrNormal)
 			return
 		}
 
-		root, err := core.Resolve(req.Context(), nd.Namesys, nd.Resolver, rootp)
-		if err != nil {
-			res.SetError(err, cmdkit.ErrNormal)
-			return
-		}
+		name := req.Arguments()[1]
 
-		rtpb, ok := root.(*dag.ProtoNode)
-		if !ok {
-			res.SetError(dag.ErrNotProtobuf, cmdkit.ErrNormal)
-			return
-		}
-
-		npath := req.Arguments()[1]
-		childp, err := path.ParsePath(req.Arguments()[2])
+		child, err := coreiface.ParsePath(req.Arguments()[2])
 		if err != nil {
 			res.SetError(err, cmdkit.ErrNormal)
 			return
@@ -321,34 +236,14 @@ to a file containing 'bar', and returns the hash of the new object.
 			return
 		}
 
-		var createfunc func() *dag.ProtoNode
-		if create {
-			createfunc = ft.EmptyDirNode
-		}
-
-		e := dagutils.NewDagEditor(rtpb, nd.DAG)
-
-		childnd, err := core.Resolve(req.Context(), nd.Namesys, nd.Resolver, childp)
-		if err != nil {
-			res.SetError(err, cmdkit.ErrNormal)
-			return
-		}
-
-		err = e.InsertNodeAtPath(req.Context(), npath, childnd, createfunc)
+		p, err := api.Object().AddLink(req.Context(), root, name, child,
+			options.Object.Create(create))
 		if err != nil {
 			res.SetError(err, cmdkit.ErrNormal)
 			return
 		}
 
-		nnode, err := e.Finalize(req.Context(), nd.DAG)
-		if err != nil {
-			res.SetError(err, cmdkit.ErrNormal)
-			return
-		}
-
-		nc := nnode.Cid()
-
-		res.SetOutput(&Object{Hash: nc.String()})
+		res.SetOutput(&Object{Hash: p.Cid().String()})
 	},
 	Type: Object{},
 	Marshalers: oldcmds.MarshalerMap{
@@ -356,13 +251,14 @@ to a file containing 'bar', and returns the hash of the new object.
 	},
 }
 
+// TODO: fix import loop with core/commands so we don't need that
 // COPIED FROM ONE LEVEL UP
-// GetNode extracts the node from the environment.
-func GetNode(env interface{}) (*core.IpfsNode, error) {
+// GetApi extracts CoreAPI instance from the environment.
+func GetApi(env interface{}) (coreiface.CoreAPI, error) {
 	ctx, ok := env.(*oldcmds.Context)
 	if !ok {
 		return nil, fmt.Errorf("expected env to be of type %T, got %T", ctx, env)
 	}
 
-	return ctx.GetNode()
+	return ctx.GetApi()
 }

core/coreapi/interface/object.go

@@ -31,7 +31,6 @@ type ObjectStat struct {
 	CumulativeSize int
 }
 
-
 const (
 	// DiffAdd is a Type of ObjectChange where a link was added to the graph
 	DiffAdd = iota
@@ -57,11 +56,11 @@ type ObjectChange struct {
 
 	// Before holds the link path before the change. Note that when a link is
 	// added, this will be nil.
-	Before Path
+	Before ResolvedPath
 
 	// After holds the link path after the change. Note that when a link is
 	// removed, this will be nil.
-	After Path
+	After ResolvedPath
 }
 
 // ObjectAPI specifies the interface to MerkleDAG and contains useful utilities

core/coreapi/interface/options/object.go

@@ -105,9 +105,9 @@ func (objectOpts) DataType(t string) ObjectPutOption {
 	}
 }
 
-// WithPin is an option for Object.Put which specifies whether to pin the added
+// Pin is an option for Object.Put which specifies whether to pin the added
 // objects, default is false
-func (objectOpts) WithPin(pin bool) ObjectPutOption {
+func (objectOpts) Pin(pin bool) ObjectPutOption {
 	return func(settings *ObjectPutSettings) error {
 		settings.Pin = pin
 		return nil

core/coreapi/object.go

@@ -318,8 +318,14 @@ func (api *ObjectAPI) Diff(ctx context.Context, before coreiface.Path, after cor
 		out[i] = coreiface.ObjectChange{
 			Type: change.Type,
 			Path: change.Path,
-			Before: coreiface.IpfsPath(change.Before),
-			After:  coreiface.IpfsPath(change.After),
+		}
+
+		if change.Before != nil {
+			out[i].Before = coreiface.IpfsPath(change.Before)
+		}
+
+		if change.After != nil {
+			out[i].After = coreiface.IpfsPath(change.After)
 		}
 	}