diff --git a/components/cli/circle.yml b/components/cli/circle.yml
index 073d4cf69e..3b4d9259e9 100644
--- a/components/cli/circle.yml
+++ b/components/cli/circle.yml
@@ -16,9 +16,7 @@ jobs:
       - run:
           name: "Lint"
           command: |
-            dockerfile=dockerfiles/Dockerfile.lint
-            echo "COPY . ." >> $dockerfile
-            docker build -f $dockerfile --tag cli-linter:$CIRCLE_BUILD_NUM .
+            docker build -f dockerfiles/Dockerfile.lint --tag cli-linter:$CIRCLE_BUILD_NUM .
             docker run --rm cli-linter:$CIRCLE_BUILD_NUM
 
   cross:
@@ -34,9 +32,7 @@ jobs:
       - run:
           name: "Cross"
           command: |
-            dockerfile=dockerfiles/Dockerfile.cross
-            echo "COPY . ." >> $dockerfile
-            docker build -f $dockerfile --tag cli-builder:$CIRCLE_BUILD_NUM .
+            docker build -f dockerfiles/Dockerfile.cross --tag cli-builder:$CIRCLE_BUILD_NUM .
             name=cross-$CIRCLE_BUILD_NUM-$CIRCLE_NODE_INDEX
             docker run \
                 -e CROSS_GROUP=$CIRCLE_NODE_INDEX \
@@ -60,9 +56,7 @@ jobs:
       - run:
           name: "Unit Test with Coverage"
           command: |
-            dockerfile=dockerfiles/Dockerfile.dev
-            echo "COPY . ." >> $dockerfile
-            docker build -f $dockerfile --tag cli-builder:$CIRCLE_BUILD_NUM .
+            docker build -f dockerfiles/Dockerfile.dev --tag cli-builder:$CIRCLE_BUILD_NUM .
             docker run --name \
                 test-$CIRCLE_BUILD_NUM cli-builder:$CIRCLE_BUILD_NUM \
                 make test-coverage
@@ -89,10 +83,8 @@ jobs:
       - run:
           name: "Validate Vendor, Docs, and Code Generation"
           command: |
-            dockerfile=dockerfiles/Dockerfile.dev
-            echo "COPY . ." >> $dockerfile
             rm -f .dockerignore # include .git
-            docker build -f $dockerfile --tag cli-builder-with-git:$CIRCLE_BUILD_NUM .
+            docker build -f dockerfiles/Dockerfile.dev --tag cli-builder-with-git:$CIRCLE_BUILD_NUM .
             docker run --rm cli-builder-with-git:$CIRCLE_BUILD_NUM \
                 make ci-validate
   shellcheck:
@@ -107,9 +99,7 @@ jobs:
       - run:
           name: "Run shellcheck"
           command: |
-            dockerfile=dockerfiles/Dockerfile.shellcheck
-            echo "COPY . ." >> $dockerfile
-            docker build -f $dockerfile --tag cli-validator:$CIRCLE_BUILD_NUM .
+            docker build -f dockerfiles/Dockerfile.shellcheck --tag cli-validator:$CIRCLE_BUILD_NUM .
             docker run --rm cli-validator:$CIRCLE_BUILD_NUM \
                 make shellcheck
 workflows:
diff --git a/components/cli/cli/command/container/client_test.go b/components/cli/cli/command/container/client_test.go
index a2c39bc6ff..b883ad1db1 100644
--- a/components/cli/cli/command/container/client_test.go
+++ b/components/cli/cli/command/container/client_test.go
@@ -12,19 +12,24 @@ import (
 
 type fakeClient struct {
 	client.Client
-	inspectFunc           func(string) (types.ContainerJSON, error)
-	execInspectFunc       func(execID string) (types.ContainerExecInspect, error)
-	execCreateFunc        func(container string, config types.ExecConfig) (types.IDResponse, error)
-	createContainerFunc   func(config *container.Config, hostConfig *container.HostConfig, networkingConfig *network.NetworkingConfig, containerName string) (container.ContainerCreateCreatedBody, error)
-	containerStartFunc    func(container string, options types.ContainerStartOptions) error
-	imageCreateFunc       func(parentReference string, options types.ImageCreateOptions) (io.ReadCloser, error)
-	infoFunc              func() (types.Info, error)
-	containerStatPathFunc func(container, path string) (types.ContainerPathStat, error)
-	containerCopyFromFunc func(container, srcPath string) (io.ReadCloser, types.ContainerPathStat, error)
-	logFunc               func(string, types.ContainerLogsOptions) (io.ReadCloser, error)
-	waitFunc              func(string) (<-chan container.ContainerWaitOKBody, <-chan error)
-	containerListFunc     func(types.ContainerListOptions) ([]types.Container, error)
-	Version               string
+	inspectFunc         func(string) (types.ContainerJSON, error)
+	execInspectFunc     func(execID string) (types.ContainerExecInspect, error)
+	execCreateFunc      func(container string, config types.ExecConfig) (types.IDResponse, error)
+	createContainerFunc func(config *container.Config,
+		hostConfig *container.HostConfig,
+		networkingConfig *network.NetworkingConfig,
+		containerName string) (container.ContainerCreateCreatedBody, error)
+	containerStartFunc      func(container string, options types.ContainerStartOptions) error
+	imageCreateFunc         func(parentReference string, options types.ImageCreateOptions) (io.ReadCloser, error)
+	infoFunc                func() (types.Info, error)
+	containerStatPathFunc   func(container, path string) (types.ContainerPathStat, error)
+	containerCopyFromFunc   func(container, srcPath string) (io.ReadCloser, types.ContainerPathStat, error)
+	logFunc                 func(string, types.ContainerLogsOptions) (io.ReadCloser, error)
+	waitFunc                func(string) (<-chan container.ContainerWaitOKBody, <-chan error)
+	containerListFunc       func(types.ContainerListOptions) ([]types.Container, error)
+	containerExportFunc     func(string) (io.ReadCloser, error)
+	containerExecResizeFunc func(id string, options types.ResizeOptions) error
+	Version                 string
 }
 
 func (f *fakeClient) ContainerList(_ context.Context, options types.ContainerListOptions) ([]types.Container, error) {
@@ -124,3 +129,17 @@ func (f *fakeClient) ContainerStart(_ context.Context, container string, options
 	}
 	return nil
 }
+
+func (f *fakeClient) ContainerExport(_ context.Context, container string) (io.ReadCloser, error) {
+	if f.containerExportFunc != nil {
+		return f.containerExportFunc(container)
+	}
+	return nil, nil
+}
+
+func (f *fakeClient) ContainerExecResize(_ context.Context, id string, options types.ResizeOptions) error {
+	if f.containerExecResizeFunc != nil {
+		return f.containerExecResizeFunc(id, options)
+	}
+	return nil
+}
diff --git a/components/cli/cli/command/container/export_test.go b/components/cli/cli/command/container/export_test.go
new file mode 100644
index 0000000000..b961ec7630
--- /dev/null
+++ b/components/cli/cli/command/container/export_test.go
@@ -0,0 +1,33 @@
+package container
+
+import (
+	"io"
+	"io/ioutil"
+	"strings"
+	"testing"
+
+	"github.com/docker/cli/internal/test"
+	"gotest.tools/assert"
+	"gotest.tools/fs"
+)
+
+func TestContainerExportOutputToFile(t *testing.T) {
+	dir := fs.NewDir(t, "export-test")
+	defer dir.Remove()
+
+	cli := test.NewFakeCli(&fakeClient{
+		containerExportFunc: func(container string) (io.ReadCloser, error) {
+			return ioutil.NopCloser(strings.NewReader("bar")), nil
+		},
+	})
+	cmd := NewExportCommand(cli)
+	cmd.SetOutput(ioutil.Discard)
+	cmd.SetArgs([]string{"-o", dir.Join("foo"), "container"})
+	assert.NilError(t, cmd.Execute())
+
+	expected := fs.Expected(t,
+		fs.WithFile("foo", "bar", fs.MatchAnyFileMode),
+	)
+
+	assert.Assert(t, fs.Equal(dir.Path(), expected))
+}
diff --git a/components/cli/cli/command/container/tty.go b/components/cli/cli/command/container/tty.go
index cb49ded8ef..b7003f1a04 100644
--- a/components/cli/cli/command/container/tty.go
+++ b/components/cli/cli/command/container/tty.go
@@ -16,9 +16,9 @@ import (
 )
 
 // resizeTtyTo resizes tty to specific height and width
-func resizeTtyTo(ctx context.Context, client client.ContainerAPIClient, id string, height, width uint, isExec bool) {
+func resizeTtyTo(ctx context.Context, client client.ContainerAPIClient, id string, height, width uint, isExec bool) error {
 	if height == 0 && width == 0 {
-		return
+		return nil
 	}
 
 	options := types.ResizeOptions{
@@ -34,19 +34,42 @@ func resizeTtyTo(ctx context.Context, client client.ContainerAPIClient, id strin
 	}
 
 	if err != nil {
-		logrus.Debugf("Error resize: %s", err)
+		logrus.Debugf("Error resize: %s\r", err)
+	}
+	return err
+}
+
+// resizeTty is to resize the tty with cli out's tty size
+func resizeTty(ctx context.Context, cli command.Cli, id string, isExec bool) error {
+	height, width := cli.Out().GetTtySize()
+	return resizeTtyTo(ctx, cli.Client(), id, height, width, isExec)
+}
+
+// initTtySize is to init the tty's size to the same as the window, if there is an error, it will retry 5 times.
+func initTtySize(ctx context.Context, cli command.Cli, id string, isExec bool, resizeTtyFunc func(ctx context.Context, cli command.Cli, id string, isExec bool) error) {
+	rttyFunc := resizeTtyFunc
+	if rttyFunc == nil {
+		rttyFunc = resizeTty
+	}
+	if err := rttyFunc(ctx, cli, id, isExec); err != nil {
+		go func() {
+			var err error
+			for retry := 0; retry < 5; retry++ {
+				time.Sleep(10 * time.Millisecond)
+				if err = rttyFunc(ctx, cli, id, isExec); err == nil {
+					break
+				}
+			}
+			if err != nil {
+				fmt.Fprintln(cli.Err(), "failed to resize tty, using default size")
+			}
+		}()
 	}
 }
 
 // MonitorTtySize updates the container tty size when the terminal tty changes size
 func MonitorTtySize(ctx context.Context, cli command.Cli, id string, isExec bool) error {
-	resizeTty := func() {
-		height, width := cli.Out().GetTtySize()
-		resizeTtyTo(ctx, cli.Client(), id, height, width, isExec)
-	}
-
-	resizeTty()
-
+	initTtySize(ctx, cli, id, isExec, resizeTty)
 	if runtime.GOOS == "windows" {
 		go func() {
 			prevH, prevW := cli.Out().GetTtySize()
@@ -55,7 +78,7 @@ func MonitorTtySize(ctx context.Context, cli command.Cli, id string, isExec bool
 				h, w := cli.Out().GetTtySize()
 
 				if prevW != w || prevH != h {
-					resizeTty()
+					resizeTty(ctx, cli, id, isExec)
 				}
 				prevH = h
 				prevW = w
@@ -66,7 +89,7 @@ func MonitorTtySize(ctx context.Context, cli command.Cli, id string, isExec bool
 		gosignal.Notify(sigchan, signal.SIGWINCH)
 		go func() {
 			for range sigchan {
-				resizeTty()
+				resizeTty(ctx, cli, id, isExec)
 			}
 		}()
 	}
diff --git a/components/cli/cli/command/container/tty_test.go b/components/cli/cli/command/container/tty_test.go
new file mode 100644
index 0000000000..eb2e0bfaab
--- /dev/null
+++ b/components/cli/cli/command/container/tty_test.go
@@ -0,0 +1,30 @@
+package container
+
+import (
+	"context"
+	"testing"
+	"time"
+
+	"github.com/docker/cli/cli/command"
+	"github.com/docker/cli/internal/test"
+	"github.com/docker/docker/api/types"
+	"github.com/pkg/errors"
+	"gotest.tools/assert"
+	is "gotest.tools/assert/cmp"
+)
+
+func TestInitTtySizeErrors(t *testing.T) {
+	expectedError := "failed to resize tty, using default size\n"
+	fakeContainerExecResizeFunc := func(id string, options types.ResizeOptions) error {
+		return errors.Errorf("Error response from daemon: no such exec")
+	}
+	fakeResizeTtyFunc := func(ctx context.Context, cli command.Cli, id string, isExec bool) error {
+		height, width := uint(1024), uint(768)
+		return resizeTtyTo(ctx, cli.Client(), id, height, width, isExec)
+	}
+	ctx := context.Background()
+	cli := test.NewFakeCli(&fakeClient{containerExecResizeFunc: fakeContainerExecResizeFunc})
+	initTtySize(ctx, cli, "8mm8nn8tt8bb", true, fakeResizeTtyFunc)
+	time.Sleep(100 * time.Millisecond)
+	assert.Check(t, is.Equal(expectedError, cli.ErrBuffer().String()))
+}
diff --git a/components/cli/contrib/completion/bash/docker b/components/cli/contrib/completion/bash/docker
index 192cdbf526..92d5740861 100644
--- a/components/cli/contrib/completion/bash/docker
+++ b/components/cli/contrib/completion/bash/docker
@@ -1,12 +1,14 @@
 #!/usr/bin/env bash
-# shellcheck disable=SC2016,SC2119,SC2155
+# shellcheck disable=SC2016,SC2119,SC2155,SC2206,SC2207
 #
 # Shellcheck ignore list:
 #  - SC2016: Expressions don't expand in single quotes, use double quotes for that.
 #  - SC2119: Use foo "$@" if function's $1 should mean script's $1.
 #  - SC2155: Declare and assign separately to avoid masking return values.
-# 
-# You can find more details for each warning at the following page: 
+#  - SC2206: Quote to prevent word splitting, or split robustly with mapfile or read -a.
+#  - SC2207: Prefer mapfile or read -a to split command output (or quote to avoid splitting).
+#
+# You can find more details for each warning at the following page:
 #    https://github.com/koalaman/shellcheck/wiki/<SCXXXX>
 #
 # bash completion file for core docker commands
diff --git a/components/cli/docker.Makefile b/components/cli/docker.Makefile
index 2ff2594a7f..628e989fb0 100644
--- a/components/cli/docker.Makefile
+++ b/components/cli/docker.Makefile
@@ -17,24 +17,29 @@ ENVVARS = -e VERSION=$(VERSION) -e GITCOMMIT -e PLATFORM
 # build docker image (dockerfiles/Dockerfile.build)
 .PHONY: build_docker_image
 build_docker_image:
-	docker build ${DOCKER_BUILD_ARGS} -t $(DEV_DOCKER_IMAGE_NAME) -f ./dockerfiles/Dockerfile.dev .
+	# build dockerfile from stdin so that we don't send the build-context; source is bind-mounted in the development environment
+	cat ./dockerfiles/Dockerfile.dev | docker build ${DOCKER_BUILD_ARGS} -t $(DEV_DOCKER_IMAGE_NAME) -
 
 # build docker image having the linting tools (dockerfiles/Dockerfile.lint)
 .PHONY: build_linter_image
 build_linter_image:
-	docker build ${DOCKER_BUILD_ARGS} -t $(LINTER_IMAGE_NAME) -f ./dockerfiles/Dockerfile.lint .
+	# build dockerfile from stdin so that we don't send the build-context; source is bind-mounted in the development environment
+	cat ./dockerfiles/Dockerfile.lint | docker build ${DOCKER_BUILD_ARGS} -t $(LINTER_IMAGE_NAME) -
 
 .PHONY: build_cross_image
 build_cross_image:
-	docker build ${DOCKER_BUILD_ARGS} -t $(CROSS_IMAGE_NAME) -f ./dockerfiles/Dockerfile.cross .
+	# build dockerfile from stdin so that we don't send the build-context; source is bind-mounted in the development environment
+	cat ./dockerfiles/Dockerfile.cross | docker build ${DOCKER_BUILD_ARGS} -t $(CROSS_IMAGE_NAME) -
 
 .PHONY: build_shell_validate_image
 build_shell_validate_image:
-	docker build -t $(VALIDATE_IMAGE_NAME) -f ./dockerfiles/Dockerfile.shellcheck .
+	# build dockerfile from stdin so that we don't send the build-context; source is bind-mounted in the development environment
+	cat ./dockerfiles/Dockerfile.shellcheck | docker build -t $(VALIDATE_IMAGE_NAME) -
 
 .PHONY: build_binary_native_image
 build_binary_native_image:
-	docker build -t $(BINARY_NATIVE_IMAGE_NAME) -f ./dockerfiles/Dockerfile.binary-native .
+	# build dockerfile from stdin so that we don't send the build-context; source is bind-mounted in the development environment
+	cat ./dockerfiles/Dockerfile.binary-native | docker build -t $(BINARY_NATIVE_IMAGE_NAME) -
 
 .PHONY: build_e2e_image
 build_e2e_image:
diff --git a/components/cli/dockerfiles/Dockerfile.cross b/components/cli/dockerfiles/Dockerfile.cross
index 9ee67e4eef..240ff2bfb5 100644
--- a/components/cli/dockerfiles/Dockerfile.cross
+++ b/components/cli/dockerfiles/Dockerfile.cross
@@ -1,3 +1,4 @@
 FROM    dockercore/golang-cross:1.10.8@sha256:a93210f55a8137b4aa4b9f033ac7a80b66ab6337e98e7afb62abe93b4ad73cad
 ENV     DISABLE_WARN_OUTSIDE_CONTAINER=1
 WORKDIR /go/src/github.com/docker/cli
+COPY    . .
diff --git a/components/cli/dockerfiles/Dockerfile.dev b/components/cli/dockerfiles/Dockerfile.dev
index c155587a7b..c8ce67ab06 100644
--- a/components/cli/dockerfiles/Dockerfile.dev
+++ b/components/cli/dockerfiles/Dockerfile.dev
@@ -22,3 +22,4 @@ ENV     CGO_ENABLED=0 \
         DISABLE_WARN_OUTSIDE_CONTAINER=1
 WORKDIR /go/src/github.com/docker/cli
 CMD     sh
+COPY    . .
diff --git a/components/cli/dockerfiles/Dockerfile.lint b/components/cli/dockerfiles/Dockerfile.lint
index 8be2d6114c..2a5354f432 100644
--- a/components/cli/dockerfiles/Dockerfile.lint
+++ b/components/cli/dockerfiles/Dockerfile.lint
@@ -15,3 +15,4 @@ ENV     CGO_ENABLED=0
 ENV     DISABLE_WARN_OUTSIDE_CONTAINER=1
 ENTRYPOINT ["/usr/local/bin/gometalinter"]
 CMD     ["--config=gometalinter.json", "./..."]
+COPY    . .
diff --git a/components/cli/dockerfiles/Dockerfile.shellcheck b/components/cli/dockerfiles/Dockerfile.shellcheck
index 43112b314d..dd3cab79b2 100644
--- a/components/cli/dockerfiles/Dockerfile.shellcheck
+++ b/components/cli/dockerfiles/Dockerfile.shellcheck
@@ -1,9 +1,5 @@
-FROM    debian:stretch-slim
-
-RUN     apt-get update && \
-        apt-get -y install make shellcheck && \
-        apt-get clean
-
+FROM    koalaman/shellcheck-alpine:v0.6.0
+RUN     apk add --no-cache bash make
 WORKDIR /go/src/github.com/docker/cli
 ENV     DISABLE_WARN_OUTSIDE_CONTAINER=1
-CMD     bash
+COPY    . .
diff --git a/components/cli/scripts/gen/windows-resources b/components/cli/scripts/gen/windows-resources
index 14b45e08e0..5fdc1b4ade 100755
--- a/components/cli/scripts/gen/windows-resources
+++ b/components/cli/scripts/gen/windows-resources
@@ -7,7 +7,7 @@ set -eu -o pipefail
 
 SCRIPTDIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 # shellcheck source=/go/src/github.com/docker/cli/scripts/build/.variables
-source $SCRIPTDIR/../build/.variables
+source "$SCRIPTDIR"/../build/.variables
 
 RESOURCES=$SCRIPTDIR/../winresources
 
@@ -26,9 +26,9 @@ VERSION_QUAD=$(echo -n "$VERSION" | sed -re 's/^([0-9.]*).*$/\1/' | tr . ,)
 
 # Pass version and commit information into the resource compiler
 defs=
-[ ! -z "$VERSION" ]      && defs+=( "-D DOCKER_VERSION=\"$VERSION\"")
-[ ! -z "$VERSION_QUAD" ] && defs+=( "-D DOCKER_VERSION_QUAD=$VERSION_QUAD")
-[ ! -z "$GITCOMMIT" ]    && defs+=( "-D DOCKER_COMMIT=\"$GITCOMMIT\"")
+[ -n "$VERSION" ]      && defs+=( "-D DOCKER_VERSION=\"$VERSION\"")
+[ -n "$VERSION_QUAD" ] && defs+=( "-D DOCKER_VERSION_QUAD=$VERSION_QUAD")
+[ -n "$GITCOMMIT" ]    && defs+=( "-D DOCKER_COMMIT=\"$GITCOMMIT\"")
 
 function makeres {
 	"$WINDRES" \
diff --git a/components/cli/scripts/test/e2e/run b/components/cli/scripts/test/e2e/run
index 173397a703..b960709701 100755
--- a/components/cli/scripts/test/e2e/run
+++ b/components/cli/scripts/test/e2e/run
@@ -70,7 +70,7 @@ function runtests {
         GOPATH="$GOPATH" \
         PATH="$PWD/build/:/usr/bin" \
         HOME="$HOME" \
-        "$(which go)" test -v ./e2e/... ${TESTFLAGS-}
+        "$(command -v go)" test -v ./e2e/... ${TESTFLAGS-}
 }
 
 export unique_id="${E2E_UNIQUE_ID:-cliendtoendsuite}"
diff --git a/components/cli/scripts/warn-outside-container b/components/cli/scripts/warn-outside-container
index e937caafeb..ecbecc0ea2 100755
--- a/components/cli/scripts/warn-outside-container
+++ b/components/cli/scripts/warn-outside-container
@@ -1,9 +1,9 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 set -eu
 
 target="${1:-}"
 
-if [[ "$target" != "help" && -z "${DISABLE_WARN_OUTSIDE_CONTAINER:-}" ]]; then
+if [ "$target" != "help" ] && [ -z "${DISABLE_WARN_OUTSIDE_CONTAINER:-}" ]; then
     (
         echo
         echo