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executor_docker_command.go
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executor_docker_command.go
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package docker
import (
"bytes"
"errors"
"sync"
"github.com/docker/docker/api/types"
"gitlab.com/gitlab-org/gitlab-runner/common"
"gitlab.com/gitlab-org/gitlab-runner/executors"
)
type commandExecutor struct {
executor
buildContainer *types.ContainerJSON
sync.Mutex
}
func (s *commandExecutor) getBuildContainer() *types.ContainerJSON {
s.Lock()
defer s.Unlock()
return s.buildContainer
}
func (s *commandExecutor) Prepare(options common.ExecutorPrepareOptions) error {
err := s.executor.Prepare(options)
if err != nil {
return err
}
s.Debugln("Starting Docker command...")
if len(s.BuildShell.DockerCommand) == 0 {
return errors.New("Script is not compatible with Docker")
}
_, err = s.getPrebuiltImage()
if err != nil {
return err
}
_, err = s.getBuildImage()
if err != nil {
return err
}
return nil
}
func (s *commandExecutor) requestNewPredefinedContainer() (*types.ContainerJSON, error) {
prebuildImage, err := s.getPrebuiltImage()
if err != nil {
return nil, err
}
buildImage := common.Image{
Name: prebuildImage.ID,
}
containerJSON, err := s.createContainer("predefined", buildImage, common.ContainerCommandBuild, []string{prebuildImage.ID})
if err != nil {
return nil, err
}
return containerJSON, err
}
func (s *commandExecutor) requestBuildContainer() (*types.ContainerJSON, error) {
s.Lock()
defer s.Unlock()
if s.buildContainer == nil {
var err error
// Start build container which will run actual build
s.buildContainer, err = s.createContainer("build", s.Build.Image, s.BuildShell.DockerCommand, []string{})
if err != nil {
return nil, err
}
}
return s.buildContainer, nil
}
func (s *commandExecutor) Run(cmd common.ExecutorCommand) error {
var runOn *types.ContainerJSON
var err error
if cmd.Predefined {
runOn, err = s.requestNewPredefinedContainer()
} else {
runOn, err = s.requestBuildContainer()
}
if err != nil {
return err
}
s.Debugln("Executing on", runOn.Name, "the", cmd.Script)
s.SetCurrentStage(DockerExecutorStageRun)
return s.watchContainer(cmd.Context, runOn.ID, bytes.NewBufferString(cmd.Script))
}
func init() {
options := executors.ExecutorOptions{
DefaultBuildsDir: "/builds",
DefaultCacheDir: "/cache",
SharedBuildsDir: false,
Shell: common.ShellScriptInfo{
Shell: "bash",
Type: common.NormalShell,
RunnerCommand: "/usr/bin/gitlab-runner-helper",
},
ShowHostname: true,
}
creator := func() common.Executor {
e := &commandExecutor{
executor: executor{
AbstractExecutor: executors.AbstractExecutor{
ExecutorOptions: options,
},
},
}
e.SetCurrentStage(common.ExecutorStageCreated)
return e
}
featuresUpdater := func(features *common.FeaturesInfo) {
features.Variables = true
features.Image = true
features.Services = true
features.Session = true
features.Terminal = true
}
common.RegisterExecutor("docker", executors.DefaultExecutorProvider{
Creator: creator,
FeaturesUpdater: featuresUpdater,
DefaultShellName: options.Shell.Shell,
})
}