Merge pull request ipfs/go-namesys#1 from ipfs/feat/docs-linting

Improve go-namesys documentation

This commit was moved from ipfs/go-namesys@1340654

namesys/dns.go

@@ -15,6 +15,7 @@ import (
 const ethTLD = "eth"
 const linkTLD = "link"
 
+// LookupTXTFunc is a generic type for a function that lookups TXT record values.
 type LookupTXTFunc func(name string) (txt []string, err error)
 
 // DNSResolver implements a Resolver on DNS domains
@@ -146,10 +147,10 @@ func parseEntry(txt string) (path.Path, error) {
 		return p, nil
 	}
 
-	return tryParseDnsLink(txt)
+	return tryParseDNSLink(txt)
 }
 
-func tryParseDnsLink(txt string) (path.Path, error) {
+func tryParseDNSLink(txt string) (path.Path, error) {
 	parts := strings.SplitN(txt, "=", 2)
 	if len(parts) == 2 && parts[0] == "dnslink" {
 		return path.ParsePath(parts[1])

namesys/interface.go

@@ -50,7 +50,7 @@ var ErrResolveRecursion = errors.New(
 // ErrPublishFailed signals an error when attempting to publish.
 var ErrPublishFailed = errors.New("could not publish name")
 
-// Namesys represents a cohesive name publishing and resolving system.
+// NameSystem represents a cohesive name publishing and resolving system.
 //
 // Publishing a name is the process of establishing a mapping, a key-value
 // pair, according to naming rules and databases.

namesys/namesys.go

@@ -1,3 +1,16 @@
+// Package namesys defines Resolver and Publisher interfaces for IPNS paths,
+// that is, IPFS paths in the form of /ipns/<name_to_be_resolved>. A "resolved"
+// IPNS path becomes an /ipfs/<cid> path.
+//
+// Traditionally, these paths would be in the form of /ipns/peer_id, which
+// references an IPNS record in a distributed ValueStore (usually the IPFS
+// DHT).
+//
+// Additionally, the /ipns/ namespace can also be used with domain names that
+// use DNSLink (/ipns/my.domain.example, see https://dnslink.io) and proquint
+// strings.
+//
+// The package provides implementations for all three resolvers.
 package namesys
 
 import (

namesys/proquint.go

@@ -9,6 +9,8 @@ import (
 	opts "github.com/ipfs/interface-go-ipfs-core/options/namesys"
 )
 
+// ProquintResolver implements the Resolver interface for proquint identifiers
+// (see http://arxiv.org/html/0901.4016).
 type ProquintResolver struct{}
 
 // Resolve implements Resolver.

namesys/publisher.go

@@ -22,6 +22,9 @@ import (
 
 const ipnsPrefix = "/ipns/"
 
+// DefaultRecordEOL specifies the time that the network will cache IPNS
+// records after being publihsed. Records should be re-published before this
+// interval expires.
 const DefaultRecordEOL = 24 * time.Hour
 
 // IpnsPublisher is capable of publishing and resolving names to the IPFS
@@ -49,11 +52,13 @@ func (p *IpnsPublisher) Publish(ctx context.Context, k ci.PrivKey, value path.Pa
 	return p.PublishWithEOL(ctx, k, value, time.Now().Add(DefaultRecordEOL))
 }
 
+// IpnsDsKey returns a datastore key given an IPNS identifier (peer
+// ID). Defines the storage key for IPNS records in the local datastore.
 func IpnsDsKey(id peer.ID) ds.Key {
 	return ds.NewKey("/ipns/" + base32.RawStdEncoding.EncodeToString([]byte(id)))
 }
 
-// PublishedNames returns the latest IPNS records published by this node and
+// ListPublished returns the latest IPNS records published by this node and
 // their expiration times.
 //
 // This method will not search the routing system for records published by other
@@ -212,6 +217,9 @@ func checkCtxTTL(ctx context.Context) (time.Duration, bool) {
 	return d, ok
 }
 
+// PutRecordToRouting publishes the given entry using the provided ValueStore,
+// keyed on the ID associated with the provided public key. The public key is
+// also made available to the routing system so that entries can be verified.
 func PutRecordToRouting(ctx context.Context, r routing.ValueStore, k ci.PubKey, entry *pb.IpnsEntry) error {
 	ctx, cancel := context.WithCancel(ctx)
 	defer cancel()
@@ -260,6 +268,8 @@ func waitOnErrChan(ctx context.Context, errs chan error) error {
 	}
 }
 
+// PublishPublicKey stores the given public key in the ValueStore with the
+// given key.
 func PublishPublicKey(ctx context.Context, r routing.ValueStore, k string, pubk ci.PubKey) error {
 	log.Debugf("Storing pubkey at: %s", k)
 	pkbytes, err := pubk.Bytes()
@@ -271,6 +281,8 @@ func PublishPublicKey(ctx context.Context, r routing.ValueStore, k string, pubk
 	return r.PutValue(ctx, k, pkbytes)
 }
 
+// PublishEntry stores the given IpnsEntry in the ValueStore with the given
+// ipnskey.
 func PublishEntry(ctx context.Context, r routing.ValueStore, ipnskey string, rec *pb.IpnsEntry) error {
 	data, err := proto.Marshal(rec)
 	if err != nil {

namesys/republisher/repub.go

@@ -1,3 +1,5 @@
+// Package republisher provides a utility to automatically re-publish IPNS
+// records related to the keys in a Keystore.
 package republisher
 
 import (
@@ -36,6 +38,8 @@ var FailureRetryInterval = time.Minute * 5
 // DefaultRecordLifetime is the default lifetime for IPNS records
 const DefaultRecordLifetime = time.Hour * 24
 
+// Republisher facilitates the regular publishing of all the IPNS records
+// associated to keys in a Keystore.
 type Republisher struct {
 	ns   namesys.Publisher
 	ds   ds.Datastore
@@ -60,6 +64,8 @@ func NewRepublisher(ns namesys.Publisher, ds ds.Datastore, self ic.PrivKey, ks k
 	}
 }
 
+// Run starts the republisher facility. It can be stopped by stopping the
+// provided proc.
 func (rp *Republisher) Run(proc goprocess.Process) {
 	timer := time.NewTimer(InitialRebroadcastDelay)
 	defer timer.Stop()

namesys/resolve_test.go

@@ -11,14 +11,13 @@ import (
 	mockrouting "github.com/ipfs/go-ipfs-routing/mock"
 	ipns "github.com/ipfs/go-ipns"
 	path "github.com/ipfs/go-path"
-	testutil "github.com/libp2p/go-libp2p-testing/net"
 	tnet "github.com/libp2p/go-libp2p-testing/net"
 )
 
 func TestRoutingResolve(t *testing.T) {
 	dstore := dssync.MutexWrap(ds.NewMapDatastore())
 	serv := mockrouting.NewServer()
-	id := testutil.RandIdentityOrFatal(t)
+	id := tnet.RandIdentityOrFatal(t)
 	d := serv.ClientWithDatastore(context.Background(), id, dstore)
 
 	resolver := NewIpnsResolver(d)
@@ -44,7 +43,7 @@ func TestRoutingResolve(t *testing.T) {
 
 func TestPrexistingExpiredRecord(t *testing.T) {
 	dstore := dssync.MutexWrap(ds.NewMapDatastore())
-	d := mockrouting.NewServer().ClientWithDatastore(context.Background(), testutil.RandIdentityOrFatal(t), dstore)
+	d := mockrouting.NewServer().ClientWithDatastore(context.Background(), tnet.RandIdentityOrFatal(t), dstore)
 
 	resolver := NewIpnsResolver(d)
 	publisher := NewIpnsPublisher(d, dstore)
@@ -78,7 +77,7 @@ func TestPrexistingExpiredRecord(t *testing.T) {
 
 func TestPrexistingRecord(t *testing.T) {
 	dstore := dssync.MutexWrap(ds.NewMapDatastore())
-	d := mockrouting.NewServer().ClientWithDatastore(context.Background(), testutil.RandIdentityOrFatal(t), dstore)
+	d := mockrouting.NewServer().ClientWithDatastore(context.Background(), tnet.RandIdentityOrFatal(t), dstore)
 
 	resolver := NewIpnsResolver(d)
 	publisher := NewIpnsPublisher(d, dstore)