package builder import ( "bytes" "fmt" "io" "io/ioutil" "os" "strings" "sync" "github.com/docker/docker/api" "github.com/docker/docker/builder/parser" "github.com/docker/docker/cliconfig" "github.com/docker/docker/daemon" "github.com/docker/docker/graph" "github.com/docker/docker/pkg/archive" "github.com/docker/docker/pkg/httputils" "github.com/docker/docker/pkg/parsers" "github.com/docker/docker/pkg/streamformatter" "github.com/docker/docker/pkg/urlutil" "github.com/docker/docker/registry" "github.com/docker/docker/runconfig" "github.com/docker/docker/utils" ) // whitelist of commands allowed for a commit/import var validCommitCommands = map[string]bool{ "entrypoint": true, "cmd": true, "user": true, "workdir": true, "env": true, "volume": true, "expose": true, "onbuild": true, } type Config struct { DockerfileName string RemoteURL string RepoName string SuppressOutput bool NoCache bool Remove bool ForceRemove bool Pull bool JSONFormat bool Memory int64 MemorySwap int64 CpuShares int64 CpuQuota int64 CpuSetCpus string CpuSetMems string AuthConfig *cliconfig.AuthConfig ConfigFile *cliconfig.ConfigFile Stdout io.Writer Context io.ReadCloser // When closed, the job has been cancelled. // Note: not all jobs implement cancellation. // See Job.Cancel() and Job.WaitCancelled() cancelled chan struct{} cancelOnce sync.Once } // When called, causes the Job.WaitCancelled channel to unblock. func (b *Config) Cancel() { b.cancelOnce.Do(func() { close(b.cancelled) }) } // Returns a channel which is closed ("never blocks") when the job is cancelled. func (b *Config) WaitCancelled() <-chan struct{} { return b.cancelled } func NewBuildConfig() *Config { return &Config{ AuthConfig: &cliconfig.AuthConfig{}, ConfigFile: &cliconfig.ConfigFile{}, cancelled: make(chan struct{}), } } func Build(d *daemon.Daemon, buildConfig *Config) error { var ( repoName string tag string context io.ReadCloser ) repoName, tag = parsers.ParseRepositoryTag(buildConfig.RepoName) if repoName != "" { if err := registry.ValidateRepositoryName(repoName); err != nil { return err } if len(tag) > 0 { if err := graph.ValidateTagName(tag); err != nil { return err } } } if buildConfig.RemoteURL == "" { context = ioutil.NopCloser(buildConfig.Context) } else if urlutil.IsGitURL(buildConfig.RemoteURL) { root, err := utils.GitClone(buildConfig.RemoteURL) if err != nil { return err } defer os.RemoveAll(root) c, err := archive.Tar(root, archive.Uncompressed) if err != nil { return err } context = c } else if urlutil.IsURL(buildConfig.RemoteURL) { f, err := httputils.Download(buildConfig.RemoteURL) if err != nil { return err } defer f.Body.Close() dockerFile, err := ioutil.ReadAll(f.Body) if err != nil { return err } // When we're downloading just a Dockerfile put it in // the default name - don't allow the client to move/specify it buildConfig.DockerfileName = api.DefaultDockerfileName c, err := archive.Generate(buildConfig.DockerfileName, string(dockerFile)) if err != nil { return err } context = c } defer context.Close() sf := streamformatter.NewStreamFormatter(buildConfig.JSONFormat) builder := &Builder{ Daemon: d, OutStream: &streamformatter.StdoutFormater{ Writer: buildConfig.Stdout, StreamFormatter: sf, }, ErrStream: &streamformatter.StderrFormater{ Writer: buildConfig.Stdout, StreamFormatter: sf, }, Verbose: !buildConfig.SuppressOutput, UtilizeCache: !buildConfig.NoCache, Remove: buildConfig.Remove, ForceRemove: buildConfig.ForceRemove, Pull: buildConfig.Pull, OutOld: buildConfig.Stdout, StreamFormatter: sf, AuthConfig: buildConfig.AuthConfig, ConfigFile: buildConfig.ConfigFile, dockerfileName: buildConfig.DockerfileName, cpuShares: buildConfig.CpuShares, cpuQuota: buildConfig.CpuQuota, cpuSetCpus: buildConfig.CpuSetCpus, cpuSetMems: buildConfig.CpuSetMems, memory: buildConfig.Memory, memorySwap: buildConfig.MemorySwap, cancelled: buildConfig.WaitCancelled(), } id, err := builder.Run(context) if err != nil { return err } if repoName != "" { return d.Repositories().Tag(repoName, tag, id, true) } return nil } func BuildFromConfig(d *daemon.Daemon, c *runconfig.Config, changes []string) (*runconfig.Config, error) { ast, err := parser.Parse(bytes.NewBufferString(strings.Join(changes, "\n"))) if err != nil { return nil, err } // ensure that the commands are valid for _, n := range ast.Children { if !validCommitCommands[n.Value] { return nil, fmt.Errorf("%s is not a valid change command", n.Value) } } builder := &Builder{ Daemon: d, Config: c, OutStream: ioutil.Discard, ErrStream: ioutil.Discard, disableCommit: true, } for i, n := range ast.Children { if err := builder.dispatch(i, n); err != nil { return nil, err } } return builder.Config, nil } func Commit(d *daemon.Daemon, name string, c *daemon.ContainerCommitConfig) (string, error) { container, err := d.Get(name) if err != nil { return "", err } newConfig, err := BuildFromConfig(d, c.Config, c.Changes) if err != nil { return "", err } if err := runconfig.Merge(newConfig, container.Config); err != nil { return "", err } img, err := d.Commit(container, c.Repo, c.Tag, c.Comment, c.Author, c.Pause, newConfig) if err != nil { return "", err } return img.ID, nil }