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Note: depends on ipld/go-ipld-prime#376
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,79 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "io" | ||
| "os" | ||
|
|
||
| "github.com/ipld/go-car/v2" | ||
| "github.com/ipld/go-car/v2/blockstore" | ||
| "github.com/urfave/cli/v2" | ||
| ) | ||
|
|
||
| // CatCar will concatinate the blocks from a set of source car files together into a | ||
| // combined destination car file. | ||
| // The root of the destination car will be the roots of the last specified source car. | ||
| func CatCar(c *cli.Context) error { | ||
| var err error | ||
| if c.Args().Len() == 0 { | ||
| return fmt.Errorf("a least one source from must be specified") | ||
| } | ||
|
|
||
| if !c.IsSet("file") { | ||
| return fmt.Errorf("a file destination must be specified") | ||
| } | ||
|
|
||
| options := []car.Option{} | ||
| switch c.Int("version") { | ||
| case 1: | ||
| options = []car.Option{blockstore.WriteAsCarV1(true)} | ||
| case 2: | ||
| // already the default | ||
| default: | ||
| return fmt.Errorf("invalid CAR version %d", c.Int("version")) | ||
| } | ||
|
|
||
| // peak at final root | ||
| lst := c.Args().Get(c.Args().Len() - 1) | ||
| lstStore, err := blockstore.OpenReadOnly(lst) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| roots, err := lstStore.Roots() | ||
| if err != nil { | ||
| return err | ||
| } | ||
| _ = lstStore.Close() | ||
|
|
||
| cdest, err := blockstore.OpenReadWrite(c.String("file"), roots, options...) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| for _, src := range c.Args().Slice() { | ||
| f, err := os.Open(src) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| blkRdr, err := car.NewBlockReader(f) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| blk, err := blkRdr.Next() | ||
| for err != io.EOF { | ||
| if err := cdest.Put(c.Context, blk); err != nil { | ||
| return err | ||
| } | ||
| blk, err = blkRdr.Next() | ||
| if err != nil && err != io.EOF { | ||
| return err | ||
| } | ||
| } | ||
|
|
||
| if err := f.Close(); err != nil { | ||
| return err | ||
| } | ||
| } | ||
|
|
||
| return cdest.Finalize() | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,67 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "io" | ||
| "os" | ||
|
|
||
| "github.com/ipfs/go-cid" | ||
| "github.com/ipld/go-car/v2" | ||
| cidlink "github.com/ipld/go-ipld-prime/linking/cid" | ||
| "github.com/ipld/go-ipld-prime/storage/memstore" | ||
| selectorparse "github.com/ipld/go-ipld-prime/traversal/selector/parse" | ||
| "github.com/multiformats/go-multicodec" | ||
| "github.com/multiformats/go-multihash" | ||
| "github.com/urfave/cli/v2" | ||
| ) | ||
|
|
||
| // ImportCar will take a file or stream representing a block of data | ||
| // and create a car in the specified codec such that the data is packaged | ||
| // into a single-block car file. | ||
| func ImportCar(c *cli.Context) error { | ||
| var err error | ||
| inStream := os.Stdin | ||
| if c.Args().Len() >= 1 && c.Args().First() != "-" { | ||
| inStream, err = os.Open(c.Args().First()) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| } | ||
| data, err := io.ReadAll(inStream) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| convertTo := multicodec.Raw | ||
| for _, candidate := range multicodec.KnownCodes() { | ||
| if candidate.String() == c.String("codec") { | ||
| convertTo = candidate | ||
| } | ||
| } | ||
|
|
||
| proto := cid.Prefix{ | ||
| Version: 1, | ||
| Codec: uint64(convertTo), | ||
| MhType: multihash.SHA2_256, | ||
| MhLength: -1, | ||
| } | ||
| root, err := proto.Sum(data) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| ls := cidlink.DefaultLinkSystem() | ||
| store := memstore.Store{} | ||
| store.Put(c.Context, string(root.KeyString()), data) | ||
| ls.SetReadStorage(&store) | ||
|
|
||
| outStream := os.Stdout | ||
| if c.Args().Len() >= 2 { | ||
| outStream, err = os.Create(c.Args().Get(1)) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| defer outStream.Close() | ||
| } | ||
| _, err = car.TraverseV1(c.Context, &ls, root, selectorparse.CommonSelector_MatchPoint, outStream) | ||
| return err | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,23 @@ | ||
| stdin filteredroot.txt | ||
| car filter ${INPUTS}/sample-wrapped-v2.car out.car | ||
| ! stderr . | ||
| car list out.car | ||
| ! stderr . | ||
| cmp stdout filteredroot.txt | ||
|
|
||
| stdin filteredcids.txt | ||
| car filter ${INPUTS}/sample-wrapped-v2.car out-2.car | ||
| car list out-2.car | ||
| ! stderr . | ||
| cmp stdout filteredcids.txt | ||
|
|
||
| car concatinate -f combined.car out.car out-2.car | ||
| ! stderr . | ||
| car list combined.car | ||
| stdout -count=3 '^bafy' | ||
|
|
||
| -- filteredroot.txt -- | ||
| bafy2bzaced4ueelaegfs5fqu4tzsh6ywbbpfk3cxppupmxfdhbpbhzawfw5oy | ||
| -- filteredcids.txt -- | ||
| bafy2bzacebohz654namrgmwjjx4qmtwgxixsd7pn4tlanyrc3g3hwj75hlxrw | ||
| bafy2bzaceaqtiesyfqd2jibmofz22oolguzf5wscwh73rmeypglfu2xhkptri |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,4 @@ | ||
| car convert ${INPUTS}/sample-wrapped-v2.car out.car dagjson | ||
| ! stderr . | ||
| car list out.car | ||
| stdout -count=1049 '^baguq' |
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