cali-example

build.sh

#!/bin/bash

docker run -e CGO_ENABLED=0 --rm -v "$PWD":/go/src/cali-example -w /go/src/cali-example golang:1.10.2 go build
docker build -t cali-example .
docker run -it --rm -v /var/run/docker.sock:/var/run/docker.sock cali-example fortune

Dockerfile

FROM scratch

COPY cali-example /tool

ENTRYPOINT ["/tool"]

example-run

nwillems@work $ # First run is with the new version
nwillems@work $ docker run -e CGO_ENABLED=0 --rm -v "$PWD":/go/src/cali-example -w /go/src/cali-example golang:1.10.2 go build && docker build -t cali-example . && docker run -it --rm -v /var/run/docker.sock:/var/run/docker.sock cali-example fortune
Sending build context to Docker daemon  21.79MB
Step 1/3 : FROM scratch
 --->
Step 2/3 : COPY cali-example /tool
 ---> efa9c55b36ae
Step 3/3 : ENTRYPOINT ["/tool"]
 ---> Running in a7092ad3cea4
Removing intermediate container a7092ad3cea4
 ---> 708969ba5c2f
Successfully built 708969ba5c2f
Successfully tagged cali-example:latest
You have a tendency to feel you are superior to most computers.
nwillems@work $ ls
Dockerfile   Gopkg.lock   Gopkg.toml   cali-example cali.go      vendor
nwillems@work $ vim Gopkg.toml # Change version
nwillems@work $ dep ensure
nwillems@work $ docker run -e CGO_ENABLED=0 --rm -v "$PWD":/go/src/cali-example -w /go/src/cali-example golang:1.10.2 go build && docker build -t cali-example . && docker run -it --rm -v /var/run/docker.sock:/var/run/docker.sock cali-example fortune
Sending build context to Docker daemon  21.79MB
Step 1/3 : FROM scratch
 --->
Step 2/3 : COPY cali-example /tool
 ---> c966765c11b7
Step 3/3 : ENTRYPOINT ["/tool"]
 ---> Running in b3d03b914ea0
Removing intermediate container b3d03b914ea0
 ---> 43a56fb5e289
Successfully built 43a56fb5e289
Successfully tagged cali-example:latest
FATA[0000] Error setting container defaults: Error expanding bind path: user: Current not implemented on linux/amd64

Gopkg.toml

[[constraint]]
  name = "github.com/skybet/cali"
  version = "0.3.0"
  # Change the above line, to provoke the error

[prune]
  go-tests = true
  unused-packages = true

main.go

package main

import "github.com/skybet/cali"

func main() {
	cli := cali.NewCli("cali-example")
	cli.SetShort("Example CLI tool")

	cmdFortune(cli)

	cli.Start()
}

func cmdFortune(cli *cali.Cli) {
	fortune := cli.NewCommand("fortune")
	fortune.SetShort("Get a fortune to bring you further in life")

	fortuneTask := fortune.Task("tsnwi/fortune:release")
	fortuneTask.SetInitFunc(func(t *cali.Task, args []string) {
		t.AddEnv("PROFILE", cli.FlagValues().GetString("profile"))
	})
}

to "fix" this, if you wan't to stick with cali v0.2.0, you need to change your build environment and base-image to alpine. Eg.

docker run -e CGO_ENABLED=0 --rm -v "$PWD":/go/src/cali-example -w /go/src/cali-example golang:1.10.2-alpine go build && docker build -t cali-example . && docker run -it --rm -v /var/run/docker.sock:/var/run/docker.sock cali-example fortune

And change https://gist.github.com/nwillems/500d819155422e68c7aa115e9521eb26#file-dockerfile-L1 to FROM alpine

There is also some fiddling with CGO_ENABLED, that I honestly don't exactly understand :-( Resources or pointers would be greatly appreciated :-)