/
docker.go
90 lines (84 loc) · 2.03 KB
/
docker.go
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package run
import (
"fmt"
"os"
"os/exec"
"syscall"
"github.com/whalebrew/whalebrew/packages"
)
// Docker implements the Runner interface
type Docker struct {
Path string
Exec func(argv0 string, argv []string, envv []string) (err error)
}
// NewDocker creates a new default Docker runner
func NewDocker() (*Docker, error) {
dockerPath, err := exec.LookPath("docker")
if err != nil {
return nil, err
}
return &Docker{
Path: dockerPath,
Exec: syscall.Exec,
}, nil
}
// Run runs a given package until completion
func (d *Docker) Run(p *packages.Package, e *Execution) error {
if p == nil {
return fmt.Errorf("No package provided")
}
if p.Image == "" {
return fmt.Errorf("Provided package does not contain any image")
}
if e == nil {
return fmt.Errorf("No execution provided")
}
dockerArgs := []string{
d.Path,
"run",
"--interactive",
"--rm",
"--workdir", e.WorkingDir,
"--init",
}
args := e.Args
if p.Entrypoint != nil {
if len(p.Entrypoint) > 0 {
dockerArgs = append(dockerArgs, "--entrypoint", p.Entrypoint[0])
if len(p.Entrypoint) > 1 {
args = append(p.Entrypoint[1:], args...)
}
}
}
for _, portmap := range p.Ports {
dockerArgs = append(dockerArgs, "-p")
dockerArgs = append(dockerArgs, portmap)
}
for _, network := range p.Networks {
dockerArgs = append(dockerArgs, "--net")
dockerArgs = append(dockerArgs, network)
}
if e.IsTTYOpened {
dockerArgs = append(dockerArgs, "--tty")
}
for _, envvar := range e.Environment {
dockerArgs = append(dockerArgs, "-e")
dockerArgs = append(dockerArgs, envvar)
}
for _, volume := range e.Volumes {
dockerArgs = append(dockerArgs, "-v")
dockerArgs = append(dockerArgs, volume)
}
if !p.KeepContainerUser {
if e.User != nil {
dockerArgs = append(dockerArgs, "-u")
dockerArgs = append(dockerArgs, e.User.Uid+":"+e.User.Gid)
}
}
dockerArgs = append(dockerArgs, p.Image)
dockerArgs = append(dockerArgs, args...)
if d.Exec == nil {
return fmt.Errorf("No docker executable provided")
}
return d.Exec(d.Path, dockerArgs, os.Environ())
}