GOARCH="amd64"
GOBIN=""
GOCACHE="/Users/jeremy/Library/Caches/go-build"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOOS="darwin"
GOPATH="/Users/jeremy/go"
GOPROXY=""
GORACE=""
GOROOT="/usr/local/go"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/darwin_amd64"
GCCGO="gccgo"
CC="clang"
CXX="clang++"
CGO_ENABLED="1"
GOMOD="/Users/jeremy/example/go.mod"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/97/k5tw9v055r57p9vv2qdl34wh0000gn/T/go-build069916519=/tmp/go-build -gno-record-gcc-switches -fno-common"

package main

import (
	"fmt"

	"golang.org/x/image/colornames"
)

func main() {
	fmt.Println(colornames.Blue)
}

package main

import "fmt"

func main() {
	fmt.Println(colornames.Blue)
}

FROM golang:1.11

RUN go get golang.org/x/tools/cmd/goimports

WORKDIR /home/example
RUN go mod init example

# Cache golang.org/x/images/colornames and populate go.mod and go.sum.
COPY withImport.go p.go
RUN go run p.go 

# Delete the golang.org/x/images/colornames import statement.
COPY withoutImport.go p.go

$ docker build -t example .
$ docker run example goimports p.go

package main

import (
	"fmt"

	"golang.org/x/image/colornames"
)

func main() {
	fmt.Println(colornames.Blue)
}

package main

import "fmt"

func main() {
	fmt.Println(colornames.Blue)
}