Switch from x/net/context to context

Since Go 1.7, context is a standard package, superceding the
"x/net/context". Since Go 1.9, the latter only provides a few type
aliases from the former. Therefore, it makes sense to switch to the
standard package.

This commit was generated by the following script (with a couple of
minor fixups to remove extra changes done by goimports):

	#!/bin/bash

	if [ $# -ge 1 ]; then
		FILES=$*
	else
		FILES=$(git ls-files \*.go | grep -vF ".pb.go" | grep -v
	^vendor/)
	fi

	for f in $FILES; do
		printf .
		sed -i -e 's|"golang.org/x/net/context"$|"context"|' $f
		goimports -w $f
		awk '	/^$/ {e=1; next;}
			/[[:space:]]"context"$/ {e=0;}
			{if (e) {print ""; e=0}; print;}' < $f > $f.new && \
				mv $f.new $f
		goimports -w $f
	done
	echo

Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>

cmd/ctr/commands/shim/shim.go

@@ -19,12 +19,11 @@
 package shim
 
 import (
+	gocontext "context"
 	"fmt"
 	"io/ioutil"
 	"net"
 
-	gocontext "context"
-
 	"github.com/containerd/console"
 	"github.com/containerd/containerd/cmd/ctr/commands"
 	shim "github.com/containerd/containerd/linux/shim/v1"

grpc.go

@@ -17,8 +17,9 @@
 package containerd
 
 import (
+	"context"
+
 	"github.com/containerd/containerd/namespaces"
-	"golang.org/x/net/context"
 	"google.golang.org/grpc"
 )
 

leases/grpc.go

@@ -17,7 +17,8 @@
 package leases
 
 import (
-	"golang.org/x/net/context"
+	"context"
+
 	"google.golang.org/grpc/metadata"
 )
 

metrics/cgroups/cgroups.go

@@ -19,6 +19,8 @@
 package cgroups
 
 import (
+	"context"
+
 	"github.com/containerd/cgroups"
 	eventstypes "github.com/containerd/containerd/api/events"
 	"github.com/containerd/containerd/events"
@@ -30,7 +32,6 @@ import (
 	"github.com/containerd/containerd/runtime"
 	metrics "github.com/docker/go-metrics"
 	"github.com/sirupsen/logrus"
-	"golang.org/x/net/context"
 )
 
 // Config for the cgroups monitor

namespaces/grpc.go

@@ -17,7 +17,8 @@
 package namespaces
 
 import (
-	"golang.org/x/net/context"
+	"context"
+
 	"google.golang.org/grpc/metadata"
 )
 

rootfs/apply.go

@@ -17,6 +17,7 @@
 package rootfs
 
 import (
+	"context"
 	"crypto/rand"
 	"encoding/base64"
 	"fmt"
@@ -30,7 +31,6 @@ import (
 	"github.com/opencontainers/image-spec/identity"
 	ocispec "github.com/opencontainers/image-spec/specs-go/v1"
 	"github.com/pkg/errors"
-	"golang.org/x/net/context"
 )
 
 // Layer represents the descriptors for a layer diff. These descriptions

rootfs/diff.go

@@ -17,13 +17,13 @@
 package rootfs
 
 import (
+	"context"
 	"fmt"
 
 	"github.com/containerd/containerd/diff"
 	"github.com/containerd/containerd/mount"
 	"github.com/containerd/containerd/snapshots"
 	ocispec "github.com/opencontainers/image-spec/specs-go/v1"
-	"golang.org/x/net/context"
 )
 
 // CreateDiff creates a layer diff for the given snapshot identifier from the

server/server.go

@@ -17,6 +17,7 @@
 package server
 
 import (
+	"context"
 	"expvar"
 	"io"
 	"net"
@@ -37,7 +38,6 @@ import (
 	metrics "github.com/docker/go-metrics"
 	grpc_prometheus "github.com/grpc-ecosystem/go-grpc-prometheus"
 	"github.com/pkg/errors"
-	"golang.org/x/net/context"
 
 	"google.golang.org/grpc"
 )

server/server_test.go

@@ -17,11 +17,11 @@
 package server
 
 import (
+	"context"
 	"testing"
 
 	"github.com/gotestyourself/gotestyourself/assert"
 	is "github.com/gotestyourself/gotestyourself/assert/cmp"
-	"golang.org/x/net/context"
 )
 
 func TestNewErrorsWithSamePathForRootAndState(t *testing.T) {

services/containers/local.go

@@ -17,6 +17,8 @@
 package containers
 
 import (
+	"context"
+
 	"github.com/boltdb/bolt"
 	eventstypes "github.com/containerd/containerd/api/events"
 	api "github.com/containerd/containerd/api/services/containers/v1"
@@ -27,7 +29,6 @@ import (
 	"github.com/containerd/containerd/plugin"
 	"github.com/containerd/containerd/services"
 	ptypes "github.com/gogo/protobuf/types"
-	"golang.org/x/net/context"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"

services/containers/service.go

@@ -17,12 +17,13 @@
 package containers
 
 import (
+	"context"
+
 	api "github.com/containerd/containerd/api/services/containers/v1"
 	"github.com/containerd/containerd/plugin"
 	"github.com/containerd/containerd/services"
 	ptypes "github.com/gogo/protobuf/types"
 	"github.com/pkg/errors"
-	"golang.org/x/net/context"
 	"google.golang.org/grpc"
 )
 

services/content/service.go

@@ -17,6 +17,7 @@
 package content
 
 import (
+	"context"
 	"io"
 	"sync"
 
@@ -30,7 +31,6 @@ import (
 	digest "github.com/opencontainers/go-digest"
 	"github.com/pkg/errors"
 	"github.com/sirupsen/logrus"
-	"golang.org/x/net/context"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"

services/diff/local.go

@@ -17,6 +17,8 @@
 package diff
 
 import (
+	"context"
+
 	diffapi "github.com/containerd/containerd/api/services/diff/v1"
 	"github.com/containerd/containerd/api/types"
 	"github.com/containerd/containerd/diff"
@@ -26,7 +28,6 @@ import (
 	"github.com/containerd/containerd/services"
 	ocispec "github.com/opencontainers/image-spec/specs-go/v1"
 	"github.com/pkg/errors"
-	"golang.org/x/net/context"
 	"google.golang.org/grpc"
 )
 

services/diff/service.go

@@ -17,11 +17,12 @@
 package diff
 
 import (
+	"context"
+
 	diffapi "github.com/containerd/containerd/api/services/diff/v1"
 	"github.com/containerd/containerd/plugin"
 	"github.com/containerd/containerd/services"
 	"github.com/pkg/errors"
-	"golang.org/x/net/context"
 	"google.golang.org/grpc"
 )
 

services/events/service.go

@@ -17,6 +17,8 @@
 package events
 
 import (
+	"context"
+
 	api "github.com/containerd/containerd/api/services/events/v1"
 	"github.com/containerd/containerd/errdefs"
 	"github.com/containerd/containerd/events"
@@ -24,7 +26,6 @@ import (
 	"github.com/containerd/containerd/plugin"
 	ptypes "github.com/gogo/protobuf/types"
 	"github.com/pkg/errors"
-	"golang.org/x/net/context"
 	"google.golang.org/grpc"
 )
 

services/images/service.go

@@ -17,12 +17,13 @@
 package images
 
 import (
+	"context"
+
 	imagesapi "github.com/containerd/containerd/api/services/images/v1"
 	"github.com/containerd/containerd/plugin"
 	"github.com/containerd/containerd/services"
 	ptypes "github.com/gogo/protobuf/types"
 	"github.com/pkg/errors"
-	"golang.org/x/net/context"
 	"google.golang.org/grpc"
 )
 

services/introspection/service.go

@@ -17,6 +17,8 @@
 package introspection
 
 import (
+	context "context"
+
 	api "github.com/containerd/containerd/api/services/introspection/v1"
 	"github.com/containerd/containerd/api/types"
 	"github.com/containerd/containerd/errdefs"
@@ -24,7 +26,6 @@ import (
 	"github.com/containerd/containerd/plugin"
 	"github.com/gogo/googleapis/google/rpc"
 	ptypes "github.com/gogo/protobuf/types"
-	context "golang.org/x/net/context"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/status"
 )

services/leases/local.go

@@ -17,6 +17,7 @@
 package leases
 
 import (
+	"context"
 	"crypto/rand"
 	"encoding/base64"
 	"fmt"
@@ -30,7 +31,6 @@ import (
 	"github.com/containerd/containerd/plugin"
 	"github.com/containerd/containerd/services"
 	ptypes "github.com/gogo/protobuf/types"
-	"golang.org/x/net/context"
 )
 
 func init() {

services/leases/service.go

@@ -17,6 +17,8 @@
 package leases
 
 import (
+	"context"
+
 	"google.golang.org/grpc"
 
 	api "github.com/containerd/containerd/api/services/leases/v1"
@@ -24,7 +26,6 @@ import (
 	"github.com/containerd/containerd/services"
 	ptypes "github.com/gogo/protobuf/types"
 	"github.com/pkg/errors"
-	"golang.org/x/net/context"
 )
 
 func init() {

services/namespaces/local.go

@@ -17,6 +17,7 @@
 package namespaces
 
 import (
+	"context"
 	"strings"
 
 	"github.com/boltdb/bolt"
@@ -29,7 +30,6 @@ import (
 	"github.com/containerd/containerd/plugin"
 	"github.com/containerd/containerd/services"
 	ptypes "github.com/gogo/protobuf/types"
-	"golang.org/x/net/context"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"

services/namespaces/service.go

@@ -17,12 +17,13 @@
 package namespaces
 
 import (
+	"context"
+
 	api "github.com/containerd/containerd/api/services/namespaces/v1"
 	"github.com/containerd/containerd/plugin"
 	"github.com/containerd/containerd/services"
 	ptypes "github.com/gogo/protobuf/types"
 	"github.com/pkg/errors"
-	"golang.org/x/net/context"
 	"google.golang.org/grpc"
 )
 

services/tasks/local.go

@@ -18,6 +18,7 @@ package tasks
 
 import (
 	"bytes"
+	"context"
 	"fmt"
 	"io"
 	"io/ioutil"
@@ -45,7 +46,6 @@ import (
 	"github.com/containerd/typeurl"
 	ptypes "github.com/gogo/protobuf/types"
 	"github.com/pkg/errors"
-	"golang.org/x/net/context"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"

services/tasks/service.go

@@ -17,12 +17,13 @@
 package tasks
 
 import (
+	"context"
+
 	api "github.com/containerd/containerd/api/services/tasks/v1"
 	"github.com/containerd/containerd/plugin"
 	"github.com/containerd/containerd/services"
 	ptypes "github.com/gogo/protobuf/types"
 	"github.com/pkg/errors"
-	"golang.org/x/net/context"
 	"google.golang.org/grpc"
 )
 

services/version/service.go

@@ -17,11 +17,12 @@
 package version
 
 import (
+	"context"
+
 	api "github.com/containerd/containerd/api/services/version/v1"
 	"github.com/containerd/containerd/plugin"
 	ctrdversion "github.com/containerd/containerd/version"
 	ptypes "github.com/gogo/protobuf/types"
-	"golang.org/x/net/context"
 	"google.golang.org/grpc"
 )