Build Docker Image From Go Code

Question

I\'m trying to build a Docker image using the Docker API and Docker Go libraries (https://github.com/docker/engine-api/). Code example:

package main
import (         


        

Answer 1

The Docker package has a function for creating a TAR from a file path. It's whats used by the CLI. It's not in the client package so it need to be installed separately:

import (
    "github.com/mitchellh/go-homedir"
    "github.com/docker/docker/pkg/archive"
)

func GetContext(filePath string) io.Reader {
    // Use homedir.Expand to resolve paths like '~/repos/myrepo'
    filePath, _ := homedir.Expand(filePath)
    ctx, _ := archive.TarWithOptions(filePath, &archive.TarOptions{})
    return ctx
}

cli.ImageBuild(context.Background(), GetContext("~/repos/myrepo"), types.ImageBuildOptions{...})