Find Docker containers with autogenerated names

main.go

package main

import (
	"bufio"
	"fmt"
	"os"
	"regexp"
	"strings"
)

func main() {
	ls := strings.Join(left[:], "|")
	rs := strings.Join(right[:], "|")
	re := regexp.MustCompile(fmt.Sprintf("\\b(%s)_(%s)\\b", ls, rs))
	s := bufio.NewScanner(os.Stdin)
	for s.Scan() {
		t := re.FindString(s.Text())
		if t != "" {
			fmt.Println(t)
		}
	}
}

Makefile

main: main.go names-generator.go
	go build -o $@ $^

names-generator.go:
	wget -O $@ https://github.com/moby/moby/raw/master/pkg/namesgenerator/names-generator.go
	sed -i '/^package /c\package main' $@