Add gomod and travis

fix inline CIDs generated by Prefix.Sum

.gx/lastpubver

@@ -1 +1 @@
-0.9.0: QmPSQnBKM9g7BaUcZCvswUJVscQ1ipjmwxN5PXCjkp9EQ7
+0.9.3: QmTbxNB1NwDesLmKTscr4udL2tVP7MaxvXnD1D9yX7g3PN

.travis.yml

@@ -1,24 +1,32 @@
-sudo: false
+os:
-
+  - linux
 
 language: go
+
 go:
-  - 'tip'
+  - 1.11.x
-  
+
+env:
+  global:
+    - GOTFLAGS="-race"
+  matrix:
+    - BUILD_DEPTYPE=gx
+    - BUILD_DEPTYPE=gomod
+
+
+# disable travis install
 install:
-  - go get github.com/whyrusleeping/gx
+  - true
-  - go get github.com/whyrusleeping/gx-go
+
-  - gx install --global
 script:
-  - gx test -v -race -coverprofile=coverage.txt -covermode=atomic .
+  - bash <(curl -s https://raw.githubusercontent.com/ipfs/ci-helpers/master/travis-ci/run-standard-tests.sh)
-  
+
-after_success:
-  - bash <(curl -s https://codecov.io/bash)
 
 cache:
   directories:
     - $GOPATH/src/gx
+    - $GOPATH/pkg/mod
+    - $HOME/.cache/go-build
 
 notifications:
-email: false
+  email: false
-  

cid.go

@@ -21,6 +21,7 @@ package cid
 
 import (
 	"bytes"
+	"encoding"
 	"encoding/binary"
 	"encoding/json"
 	"errors"
@@ -79,6 +80,8 @@ const (
 	ZcashTx            = 0xc1
 	DecredBlock        = 0xe0
 	DecredTx           = 0xe1
+	DashBlock          = 0xf0
+	DashTx             = 0xf1
 )
 
 // Codecs maps the name of a codec to its type
@@ -103,6 +106,8 @@ var Codecs = map[string]uint64{
 	"zcash-tx":             ZcashTx,
 	"decred-block":         DecredBlock,
 	"decred-tx":            DecredTx,
+	"dash-block":           DashBlock,
+	"dash-tx":              DashTx,
 }
 
 // CodecToStr maps the numeric codec to its name
@@ -126,6 +131,8 @@ var CodecToStr = map[uint64]string{
 	ZcashTx:            "zcash-tx",
 	DecredBlock:        "decred-block",
 	DecredTx:           "decred-tx",
+	DashBlock:          "dash-block",
+	DashTx:             "dash-tx",
 }
 
 // NewCidV0 returns a Cid-wrapped multihash.
@@ -161,7 +168,12 @@ func NewCidV1(codecType uint64, mhash mh.Multihash) Cid {
 	return Cid{string(buf[:n+hashlen])}
 }
 
-// Cid represents a self-describing content adressed
+var _ encoding.BinaryMarshaler = Cid{}
+var _ encoding.BinaryUnmarshaler = (*Cid)(nil)
+var _ encoding.TextMarshaler = Cid{}
+var _ encoding.TextUnmarshaler = (*Cid)(nil)
+
+// Cid represents a self-describing content addressed
 // identifier. It is formed by a Version, a Codec (which indicates
 // a multicodec-packed content type) and a Multihash.
 type Cid struct{ str string }
@@ -308,6 +320,28 @@ func Cast(data []byte) (Cid, error) {
 	return Cid{string(data[0 : n+cn+len(h)])}, nil
 }
 
+// UnmarshalBinary is equivalent to Cast(). It implements the
+// encoding.BinaryUnmarshaler interface.
+func (c *Cid) UnmarshalBinary(data []byte) error {
+	casted, err := Cast(data)
+	if err != nil {
+		return err
+	}
+	c.str = casted.str
+	return nil
+}
+
+// UnmarshalText is equivalent to Decode(). It implements the
+// encoding.TextUnmarshaler interface.
+func (c *Cid) UnmarshalText(text []byte) error {
+	decodedCid, err := Decode(string(text))
+	if err != nil {
+		return err
+	}
+	c.str = decodedCid.str
+	return nil
+}
+
 // Version returns the Cid version.
 func (c Cid) Version() uint64 {
 	if len(c.str) == 34 && c.str[0] == 18 && c.str[1] == 32 {
@@ -398,6 +432,18 @@ func (c Cid) Bytes() []byte {
 	return []byte(c.str)
 }
 
+// MarshalBinary is equivalent to Bytes(). It implements the
+// encoding.BinaryMarshaler interface.
+func (c Cid) MarshalBinary() ([]byte, error) {
+	return c.Bytes(), nil
+}
+
+// MarshalText is equivalent to String(). It implements the
+// encoding.TextMarshaler interface.
+func (c Cid) MarshalText() ([]byte, error) {
+	return []byte(c.String()), nil
+}
+
 // Equals checks that two Cids are the same.
 // In order for two Cids to be considered equal, the
 // Version, the Codec and the Multihash must match.
@@ -490,7 +536,12 @@ type Prefix struct {
 // Sum uses the information in a prefix to perform a multihash.Sum()
 // and return a newly constructed Cid with the resulting multihash.
 func (p Prefix) Sum(data []byte) (Cid, error) {
-	hash, err := mh.Sum(data, p.MhType, p.MhLength)
+	length := p.MhLength
+	if p.MhType == mh.ID {
+		length = -1
+	}
+
+	hash, err := mh.Sum(data, p.MhType, length)
 	if err != nil {
 		return Undef, err
 	}

cid_test.go

@@ -35,6 +35,8 @@ var tCodecs = map[uint64]string{
 	ZcashTx:            "zcash-tx",
 	DecredBlock:        "decred-block",
 	DecredTx:           "decred-tx",
+	DashBlock:          "dash-block",
+	DashTx:             "dash-tx",
 }
 
 func assertEqual(t *testing.T, a, b Cid) {
@@ -71,6 +73,34 @@ func TestTableForV0(t *testing.T) {
 	}
 }
 
+func TestPrefixSum(t *testing.T) {
+	// Test creating CIDs both manually and with Prefix.
+	// Tests: https://github.com/ipfs/go-cid/issues/83
+	for _, hashfun := range []uint64{
+		mh.ID, mh.SHA3, mh.SHA2_256,
+	} {
+		h1, err := mh.Sum([]byte("TEST"), hashfun, -1)
+		if err != nil {
+			t.Fatal(err)
+		}
+		c1 := NewCidV1(Raw, h1)
+
+		h2, err := mh.Sum([]byte("foobar"), hashfun, -1)
+		if err != nil {
+			t.Fatal(err)
+		}
+		c2 := NewCidV1(Raw, h2)
+
+		c3, err := c1.Prefix().Sum([]byte("foobar"))
+		if err != nil {
+			t.Fatal(err)
+		}
+		if !c2.Equals(c3) {
+			t.Fatal("expected CIDs to be equal")
+		}
+	}
+}
+
 func TestBasicMarshaling(t *testing.T) {
 	h, err := mh.Sum([]byte("TEST"), mh.SHA3, 4)
 	if err != nil {
@@ -156,6 +186,44 @@ func TestBasesMarshaling(t *testing.T) {
 	}
 }
 
+func TestBinaryMarshaling(t *testing.T) {
+	data := []byte("this is some test content")
+	hash, _ := mh.Sum(data, mh.SHA2_256, -1)
+	c := NewCidV1(DagCBOR, hash)
+	var c2 Cid
+
+	data, err := c.MarshalBinary()
+	if err != nil {
+		t.Fatal(err)
+	}
+	err = c2.UnmarshalBinary(data)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !c.Equals(c2) {
+		t.Errorf("cids should be the same: %s %s", c, c2)
+	}
+}
+
+func TestTextMarshaling(t *testing.T) {
+	data := []byte("this is some test content")
+	hash, _ := mh.Sum(data, mh.SHA2_256, -1)
+	c := NewCidV1(DagCBOR, hash)
+	var c2 Cid
+
+	data, err := c.MarshalText()
+	if err != nil {
+		t.Fatal(err)
+	}
+	err = c2.UnmarshalText(data)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !c.Equals(c2) {
+		t.Errorf("cids should be the same: %s %s", c, c2)
+	}
+}
+
 func TestEmptyString(t *testing.T) {
 	_, err := Decode("")
 	if err == nil {

go.mod

@@ -0,0 +1,6 @@
+module github.com/ipfs/go-cid
+
+require (
+	github.com/multiformats/go-multibase v0.0.1
+	github.com/multiformats/go-multihash v0.0.1
+)

go.sum

@@ -0,0 +1,20 @@
+github.com/gxed/hashland/keccakpg v0.0.1 h1:wrk3uMNaMxbXiHibbPO4S0ymqJMm41WiudyFSs7UnsU=
+github.com/gxed/hashland/keccakpg v0.0.1/go.mod h1:kRzw3HkwxFU1mpmPP8v1WyQzwdGfmKFJ6tItnhQ67kU=
+github.com/gxed/hashland/murmur3 v0.0.1 h1:SheiaIt0sda5K+8FLz952/1iWS9zrnKsEJaOJu4ZbSc=
+github.com/gxed/hashland/murmur3 v0.0.1/go.mod h1:KjXop02n4/ckmZSnY2+HKcLud/tcmvhST0bie/0lS48=
+github.com/minio/blake2b-simd v0.0.0-20160723061019-3f5f724cb5b1 h1:lYpkrQH5ajf0OXOcUbGjvZxxijuBwbbmlSxLiuofa+g=
+github.com/minio/blake2b-simd v0.0.0-20160723061019-3f5f724cb5b1/go.mod h1:pD8RvIylQ358TN4wwqatJ8rNavkEINozVn9DtGI3dfQ=
+github.com/minio/sha256-simd v0.0.0-20190131020904-2d45a736cd16 h1:5W7KhL8HVF3XCFOweFD3BNESdnO8ewyYTFT2R+/b8FQ=
+github.com/minio/sha256-simd v0.0.0-20190131020904-2d45a736cd16/go.mod h1:2FMWW+8GMoPweT6+pI63m9YE3Lmw4J71hV56Chs1E/U=
+github.com/mr-tron/base58 v1.1.0 h1:Y51FGVJ91WBqCEabAi5OPUz38eAx8DakuAm5svLcsfQ=
+github.com/mr-tron/base58 v1.1.0/go.mod h1:xcD2VGqlgYjBdcBLw+TuYLr8afG+Hj8g2eTVqeSzSU8=
+github.com/multiformats/go-base32 v0.0.3 h1:tw5+NhuwaOjJCC5Pp82QuXbrmLzWg7uxlMFp8Nq/kkI=
+github.com/multiformats/go-base32 v0.0.3/go.mod h1:pLiuGC8y0QR3Ue4Zug5UzK9LjgbkL8NSQj0zQ5Nz/AA=
+github.com/multiformats/go-multibase v0.0.1 h1:PN9/v21eLywrFWdFNsFKaU04kLJzuYzmrJR+ubhT9qA=
+github.com/multiformats/go-multibase v0.0.1/go.mod h1:bja2MqRZ3ggyXtZSEDKpl0uO/gviWFaSteVbWT51qgs=
+github.com/multiformats/go-multihash v0.0.1 h1:HHwN1K12I+XllBCrqKnhX949Orn4oawPkegHMu2vDqQ=
+github.com/multiformats/go-multihash v0.0.1/go.mod h1:w/5tugSrLEbWqlcgJabL3oHFKTwfvkofsjW2Qa1ct4U=
+golang.org/x/crypto v0.0.0-20190211182817-74369b46fc67 h1:ng3VDlRp5/DHpSWl02R4rM9I+8M2rhmsuLwAMmkLQWE=
+golang.org/x/crypto v0.0.0-20190211182817-74369b46fc67/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
+golang.org/x/sys v0.0.0-20190219092855-153ac476189d h1:Z0Ahzd7HltpJtjAHHxX8QFP3j1yYgiuvjbjRzDj/KH0=
+golang.org/x/sys v0.0.0-20190219092855-153ac476189d/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=

package.json

@@ -9,9 +9,9 @@
   "gxDependencies": [
     {
       "author": "whyrusleeping",
-      "hash": "QmPnFwZ2JXKnXgMw8CdBPxn7FWh6LLdjUjxV1fKHuJnkr8",
+      "hash": "QmerPMzPk1mJVowm8KgmoknWa4yCYvvugMPsgWmDNUvDLW",
       "name": "go-multihash",
-      "version": "1.0.8"
+      "version": "1.0.9"
     },
     {
       "author": "whyrusleeping",
@@ -25,6 +25,6 @@
   "license": "MIT",
   "name": "go-cid",
   "releaseCmd": "git commit -a -m \"gx publish $VERSION\"",
-  "version": "0.9.0"
+  "version": "0.9.3"
 }