Add comments; Check ctx.Err(); Move import

License: MIT
Signed-off-by: Michael Avila <davidmichaelavila@gmail.com>

core/core.go

@@ -14,7 +14,6 @@ import (
 	"context"
 	"errors"
 	"fmt"
-	"github.com/ipfs/go-ipfs/provider"
 	"io"
 	"io/ioutil"
 	"os"
@@ -29,6 +28,7 @@ import (
 	ipnsrp "github.com/ipfs/go-ipfs/namesys/republisher"
 	p2p "github.com/ipfs/go-ipfs/p2p"
 	pin "github.com/ipfs/go-ipfs/pin"
+	provider "github.com/ipfs/go-ipfs/provider"
 	repo "github.com/ipfs/go-ipfs/repo"
 
 	bitswap "github.com/ipfs/go-bitswap"

provider/provider.go

@@ -17,7 +17,9 @@ const provideOutgoingWorkerLimit = 8
 
 // Provider announces blocks to the network
 type Provider interface {
+	// Run is used to begin processing the provider work
 	Run()
+	// Provide takes a cid and makes an attempt to announce it to the network
 	Provide(cid.Cid) error
 }
 
@@ -54,6 +56,10 @@ func (p *provider) handleAnnouncements() {
 	for workers := 0; workers < provideOutgoingWorkerLimit; workers++ {
 		go func() {
 			for {
+				if err := p.ctx.Err(); err != nil {
+					log.Warningf("Provider context error: %s", err)
+					return
+				}
 				select {
 				case <-p.ctx.Done():
 					return