func main() {
if reexec.Init() {
return
}
// Set terminal emulation based on platform as required.
stdin, stdout, stderr := term.StdStreams()
logrus.SetOutput(stderr)
flag.Merge(flag.CommandLine, clientFlags.FlagSet, commonFlags.FlagSet)
flag.Usage = func() {
fmt.Fprint(os.Stdout, "Usage: docker [OPTIONS] COMMAND [arg...]\n"+daemonUsage+" docker [ -h | --help | -v | --version ]\n\n")
fmt.Fprint(os.Stdout, "A self-sufficient runtime for containers.\n\nOptions:\n")
flag.CommandLine.SetOutput(os.Stdout)
flag.PrintDefaults()
help := "\nCommands:\n"
for _, cmd := range dockerCommands {
help += fmt.Sprintf(" %-10.10s%s\n", cmd.name, cmd.description)
}
help += "\nRun 'docker COMMAND --help' for more information on a command."
fmt.Fprintf(os.Stdout, "%s\n", help)
}
flag.Parse()
if *flVersion {
showVersion()
return
}
clientCli := client.NewDockerCli(stdin, stdout, stderr, clientFlags)
// TODO: remove once `-d` is retired
handleGlobalDaemonFlag()
if *flHelp {
// if global flag --help is present, regardless of what other options and commands there are,
// just print the usage.
flag.Usage()
return
}
c := cli.New(clientCli, daemonCli)
if err := c.Run(flag.Args()...); err != nil {
if sterr, ok := err.(cli.StatusError); ok {
if sterr.Status != "" {
fmt.Fprintln(os.Stderr, sterr.Status)
os.Exit(1)
}
os.Exit(sterr.StatusCode)
}
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
}
func main() {
if help {
flag.PrintDefaults()
} else {
target := flag.Arg(0)
if keys.Len() == 0 {
fmt.Fprintln(os.Stderr, "WARNING: No signing keys specified, upload *DISABLED*")
}
if target != "" {
strkeys := keys.GetAll()
digest, manifest, err := processTarget(target, strkeys)
if err != nil {
fmt.Printf("Error processing target: %s\n", err)
os.Exit(1)
}
if verbose {
fmt.Println(manifest)
}
fmt.Printf("Done! Referencing digest: %s\n", digest)
}
}
os.Exit(0)
}
func main() {
switch {
case h:
flag.PrintDefaults()
case server:
// TODO: Better way to copy these arguments to sshd?
sshcamArgs := []string{
"--device=" + device,
"--size=" + sizeFlag,
"--color-algorithm=" + distanceAlgorithm,
"--max-fps=" + strconv.Itoa(maxFPS)}
if colorful {
sshcamArgs = append(sshcamArgs, "--color")
}
if asciiOnly {
sshcamArgs = append(sshcamArgs, "--ascii-only")
}
sshd.Run(user, pass, listen, strconv.Itoa(port), sshcamArgs)
default:
var wg sync.WaitGroup
// Initialize the webcam device
webcam.OpenWebcam(device, size.Width, size.Height)
defer webcam.CloseWebcam()
// Start the TTY size updater goroutine
ttyStatus := updateTTYSize()
// Fire the drawing goroutine
wg.Add(1)
go streaming(ttyStatus, &wg)
wg.Wait()
}
}
func init() {
var placeholderTrustKey string
// TODO use flag flag.String([]string{"i", "-identity"}, "", "Path to libtrust key file")
flTrustKey = &placeholderTrustKey
flag.StringVar(&tlsOptions.CAFile, []string{"-tlscacert"}, filepath.Join(dockerCertPath, defaultCaFile), "Trust certs signed only by this CA")
flag.StringVar(&tlsOptions.CertFile, []string{"-tlscert"}, filepath.Join(dockerCertPath, defaultCertFile), "Path to TLS certificate file")
flag.StringVar(&tlsOptions.KeyFile, []string{"-tlskey"}, filepath.Join(dockerCertPath, defaultKeyFile), "Path to TLS key file")
opts.HostListVar(&flHosts, []string{"H", "-host"}, "Daemon socket(s) to connect to")
flag.Usage = func() {
fmt.Fprint(os.Stdout, "Usage: docker [OPTIONS] COMMAND [arg...]\n\nA self-sufficient runtime for linux containers.\n\nOptions:\n")
flag.CommandLine.SetOutput(os.Stdout)
flag.PrintDefaults()
help := "\nCommands:\n"
sort.Sort(byName(dockerCommands))
for _, cmd := range dockerCommands {
help += fmt.Sprintf(" %-10.10s%s\n", cmd.name, cmd.description)
}
help += "\nRun 'docker COMMAND --help' for more information on a command."
fmt.Fprintf(os.Stdout, "%s\n", help)
}
}
func init() {
flCa = flag.String([]string{"-tlscacert"}, filepath.Join(dockerCertPath, defaultCaFile), "Trust only remotes providing a certificate signed by the CA given here")
flCert = flag.String([]string{"-tlscert"}, filepath.Join(dockerCertPath, defaultCertFile), "Path to TLS certificate file")
flKey = flag.String([]string{"-tlskey"}, filepath.Join(dockerCertPath, defaultKeyFile), "Path to TLS key file")
opts.HostListVar(&flHosts, []string{"H", "-host"}, "The socket(s) to bind to in daemon mode or connect to in client mode, specified using one or more tcp://host:port, unix:///path/to/socket, fd://* or fd://socketfd.")
flag.Usage = func() {
fmt.Fprint(os.Stderr, "Usage: docker [OPTIONS] COMMAND [arg...]\n\nA self-sufficient runtime for linux containers.\n\nOptions:\n")
flag.PrintDefaults()
help := "\nCommands:\n"
for _, command := range [][]string{
{"attach", "Attach to a running container"},
{"build", "Build an image from a Dockerfile"},
{"commit", "Create a new image from a container's changes"},
{"cp", "Copy files/folders from a container's filesystem to the host path"},
{"create", "Create a new container"},
{"diff", "Inspect changes on a container's filesystem"},
{"events", "Get real time events from the server"},
{"exec", "Run a command in an existing container"},
{"export", "Stream the contents of a container as a tar archive"},
{"history", "Show the history of an image"},
{"images", "List images"},
{"import", "Create a new filesystem image from the contents of a tarball"},
{"info", "Display system-wide information"},
{"inspect", "Return low-level information on a container"},
{"kill", "Kill a running container"},
{"load", "Load an image from a tar archive"},
{"login", "Register or log in to a Docker registry server"},
{"logout", "Log out from a Docker registry server"},
{"logs", "Fetch the logs of a container"},
{"port", "Lookup the public-facing port that is NAT-ed to PRIVATE_PORT"},
{"pause", "Pause all processes within a container"},
{"ps", "List containers"},
{"pull", "Pull an image or a repository from a Docker registry server"},
{"push", "Push an image or a repository to a Docker registry server"},
{"restart", "Restart a running container"},
{"rm", "Remove one or more containers"},
{"rmi", "Remove one or more images"},
{"run", "Run a command in a new container"},
{"save", "Save an image to a tar archive"},
{"search", "Search for an image on the Docker Hub"},
{"start", "Start a stopped container"},
{"stop", "Stop a running container"},
{"tag", "Tag an image into a repository"},
{"top", "Lookup the running processes of a container"},
{"unpause", "Unpause a paused container"},
{"version", "Show the Docker version information"},
{"wait", "Block until a container stops, then print its exit code"},
} {
help += fmt.Sprintf(" %-10.10s%s\n", command[0], command[1])
}
help += "\nRun 'docker COMMAND --help' for more information on a command."
fmt.Fprintf(os.Stderr, "%s\n", help)
}
}
func main() {
if help {
flag.PrintDefaults()
} else {
target := flag.Arg(0)
if target != "" {
//fmt.Printf("outputting manifest for: %q with key: %q\n", target, key)
outputManifestFor(target)
}
}
}
func main() {
if h {
flag.PrintDefaults()
} else {
fmt.Printf("s/#hidden/-string: %s\n", str)
fmt.Printf("b: %t\n", b)
fmt.Printf("-bool: %t\n", b2)
fmt.Printf("s/#hidden/-string(via lookup): %s\n", flag.Lookup("s").Value.String())
fmt.Printf("ARGS: %v\n", flag.Args())
}
}
func main() {
if reexec.Init() {
return
}
// Set terminal emulation based on platform as required.
_, stdout, stderr := term.StdStreams()
logrus.SetOutput(stderr)
flag.Merge(flag.CommandLine, daemonCli.commonFlags.FlagSet)
flag.Usage = func() {
fmt.Fprint(stdout, "Usage: dockerd [ --help | -v | --version ]\n\n")
fmt.Fprint(stdout, "A self-sufficient runtime for containers.\n\nOptions:\n")
flag.CommandLine.SetOutput(stdout)
flag.PrintDefaults()
}
flag.CommandLine.ShortUsage = func() {
fmt.Fprint(stderr, "\nUsage:\tdockerd [OPTIONS]\n")
}
if err := flag.CommandLine.ParseFlags(os.Args[1:], false); err != nil {
os.Exit(1)
}
if *flVersion {
showVersion()
return
}
if *flHelp {
// if global flag --help is present, regardless of what other options and commands there are,
// just print the usage.
flag.Usage()
return
}
// On Windows, this may be launching as a service or with an option to
// register the service.
stop, err := initService()
if err != nil {
logrus.Fatal(err)
}
if !stop {
err = daemonCli.start()
notifyShutdown(err)
if err != nil {
logrus.Fatal(err)
}
}
}
func main() {
fmt.Print("Hello, world\n")
// Define global flag here
// end global flag definition
flag.Usage = func() {
fmt.Fprint(os.Stdout, "Usage: docking [OPTIONS] COMMAND [arg...]\n docking [ --help | -v | --version ]\n\n")
fmt.Fprint(os.Stdout, "A self-sufficient runtime for containers.\n\nOptions:\n")
flag.CommandLine.SetOutput(os.Stdout)
flag.PrintDefaults()
help := "\nCommands:\n"
for _, cmd := range dockingCommands {
help += fmt.Sprintf(" %-10.10s%s\n", cmd.Name, cmd.Description)
}
help += "\nRun 'docking COMMAND --help' for more information on a command."
fmt.Fprintf(os.Stdout, "%s\n", help)
}
flag.Parse()
if *flVersion {
showVersion()
return
}
if *flHelp {
// if global flag --help is present, regardless of what other options and commands there are,
// just print the usage.
flag.Usage()
return
}
clientCli := client.NewDockingCli(os.Stdin, os.Stdout, os.Stderr, clientFlags)
c := cli.New(clientCli)
if err := c.Run(flag.Args()...); err != nil {
if sterr, ok := err.(cli.StatusError); ok {
if sterr.Status != "" {
fmt.Fprintln(os.Stderr, sterr.Status)
os.Exit(1)
}
os.Exit(sterr.StatusCode)
}
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
}
func init() {
flag.Usage = func() {
fmt.Fprint(os.Stdout, "Usage: dnet [OPTIONS] COMMAND [arg...]\n\nA self-sufficient runtime for container networking.\n\nOptions:\n")
flag.CommandLine.SetOutput(os.Stdout)
flag.PrintDefaults()
help := "\nCommands:\n"
for _, cmd := range dnetCommands {
help += fmt.Sprintf(" %-10.10s%s\n", cmd.name, cmd.description)
}
help += "\nRun 'dnet COMMAND --help' for more information on a command."
fmt.Fprintf(os.Stdout, "%s\n", help)
}
}
// doFlags defines the cmdline Usage string and parses flag options.
func doFlags() {
flag.Usage = func() {
fmt.Fprintf(os.Stderr, " Usage: %s [OPTIONS] REGISTRY REPO [REPO...]\n", os.Args[0])
fmt.Fprintf(os.Stderr, "\n REGISTRY:\n")
fmt.Fprintf(os.Stderr, "\tURL of your Docker registry; use index.docker.io for Docker Hub, use local.host to collect images from local Docker host\n")
fmt.Fprintf(os.Stderr, "\n REPO:\n")
fmt.Fprintf(os.Stderr, "\tOne or more repos to gather info about; if no repo is specified Collector will gather info on *all* repos in the Registry\n")
fmt.Fprintf(os.Stderr, "\n Environment variables:\n")
fmt.Fprintf(os.Stderr, "\tCOLLECTOR_DIR: (Required) Directory that contains the \"data\" folder with Collector default scripts, e.g., $GOPATH/src/github.com/banyanops/collector\n")
fmt.Fprintf(os.Stderr, "\tCOLLECTOR_ID: ID provided by Banyan web interface to register Collector with the Banyan service\n")
fmt.Fprintf(os.Stderr, "\tBANYAN_HOST_DIR: Host directory mounted into Collector/Target containers where results are stored (default: $HOME/.banyan)\n")
fmt.Fprintf(os.Stderr, "\tBANYAN_DIR: (Specify only in Dockerfile) Directory in the Collector container where host directory BANYAN_HOST_DIR is mounted\n")
fmt.Fprintf(os.Stderr, "\tDOCKER_{HOST,CERT_PATH,TLS_VERIFY}: If set, e.g., by docker-machine, then they take precedence over --dockerProto and --dockerAddr\n")
printExampleUsage()
fmt.Fprintf(os.Stderr, " Options:\n")
flag.PrintDefaults()
}
flag.Parse()
if config.COLLECTORDIR() == "" {
flag.Usage()
os.Exit(except.ErrorExitStatus)
}
if len(flag.Args()) < 1 {
flag.Usage()
os.Exit(except.ErrorExitStatus)
}
if *dockerProto != "unix" && *dockerProto != "tcp" {
flag.Usage()
os.Exit(except.ErrorExitStatus)
}
requiredDirs := []string{config.BANYANDIR(), filepath.Dir(*imageList), filepath.Dir(*repoList), *config.BanyanOutDir, collector.DefaultScriptsDir, collector.UserScriptsDir, collector.BinDir}
for _, dir := range requiredDirs {
blog.Debug("Creating directory: " + dir)
err := fsutil.CreateDirIfNotExist(dir)
if err != nil {
except.Fail(err, ": Error in creating a required directory: ", dir)
}
}
collector.RegistrySpec = flag.Arg(0)
// EqualFold: case insensitive comparison
if strings.EqualFold(flag.Arg(0), "local.host") {
collector.LocalHost = true
}
//nextMaxImages = *maxImages
}
func main() {
flag.Usage = func() {
fmt.Fprint(os.Stdout, "Usage: gofind [OPTIONS] COMMAND [arg...]\ngofind [ --help | -v | --version ]\n")
flag.CommandLine.SetOutput(os.Stdout)
flag.PrintDefaults()
}
if h {
flag.Usage()
} else {
fmt.Printf("Path: %s\n", path)
fmt.Printf("Name: %s\n", name)
fmt.Printf("ARGS: %v\n", flag.Args())
err := finder(path, name)
if err != nil {
fmt.Println(err)
return
}
}
}
func main() {
switch {
case h:
flag.PrintDefaults()
default:
m := martini.Classic()
m.Use(render.Renderer())
m.Use(cors.Allow(&cors.Options{
AllowOrigins: []string{"*"},
AllowHeaders: []string{"Origin"},
}))
m.Get("/user/:id", GetUserLogs)
m.Get("/repo/:name", GetRepoLogs)
m.Run()
}
}
func main() {
if help {
mflag.PrintDefaults()
return
}
config, err := config.ReadConfig(conffile, env)
if err != nil {
logrus.Errorln("main", err)
return
}
var distribute distributed.Distributed
if master {
distribute = &distributed.Master{}
} else {
distribute = &distributed.Slave{}
}
distribute.Init(config)
distribute.Done("str")
}
func Usage() {
fmt.Printf("Usage: %s [options]\n\n%s", os.Args[0], "Options:")
flag.PrintDefaults()
os.Exit(retOk)
}
func main() {
//启动前检查，防止出现已经启动的情况
if reexec.Init() {
return
}
// Set terminal emulation based on platform as required.
stdin, stdout, stderr := term.StdStreams()
logrus.SetOutput(stderr)
//合并参数类型，所有的参数类型都是FlagSet类，该类定义如下：
//type FlagSet struct {
// Usage is the function called when an error occurs while parsing flags.
// The field is a function (not a method) that may be changed to point to
// a custom error handler.
/*Usage func()
ShortUsage func()
name string
parsed bool
actual map[string]*Flag
formal map[string]*Flag
args []string // arguments after flags
errorHandling ErrorHandling
output io.Writer // nil means stderr; use Out() accessor
nArgRequirements []nArgRequirement
}*/
//合并参数到flag.CommandLine中。CommandLine中对应的是Options。
flag.Merge(flag.CommandLine, clientFlags.FlagSet, commonFlags.FlagSet)
//打印docker的使用方式。这里其实只是设置Usage这个函数的实现，以便需要打印的时候打印。
flag.Usage = func() {
//第一行是正常的使用方式；第二行是daemon的使用方式；第三行固定输出
fmt.Fprint(stdout, "Usage: docker [OPTIONS] COMMAND [arg...]\n"+daemonUsage+" docker [ --help | -v | --version ]\n\n")
fmt.Fprint(stdout, "A self-sufficient runtime for containers.\n\nOptions:\n")
//输出Options的内容，打印CommandLine中的内容。这一行设置输出到标准输出。
flag.CommandLine.SetOutput(stdout)
//真实的打印内容
flag.PrintDefaults()
//开始打印可选择的命令Commands。
help := "\nCommands:\n"
//循环输出dockerCommands命令中的可选择命令，分别打印他们的名字和描述信息。
//dockerCommands最终由cli.DockerCommands中提供。
for _, cmd := range dockerCommands {
help += fmt.Sprintf(" %-10.10s%s\n", cmd.Name, cmd.Description)
}
help += "\nRun 'docker COMMAND --help' for more information on a command."
//真实的打印
fmt.Fprintf(stdout, "%s\n", help)
}
//解析参数
flag.Parse()
//version单独处理，这里通过判断flVersion的返回结果是否为真进行处理。
if *flVersion {
showVersion()
return
}
//help信息单独处理
if *flHelp {
// if global flag --help is present, regardless of what other options and commands there are,
// just print the usage.
flag.Usage()
return
}
//创建client模式的docker，详细分析请见api/client/cli.go包中的NewDockerCli函数。
clientCli := client.NewDockerCli(stdin, stdout, stderr, clientFlags)
//合并client模式的docker和daemonCli模式的docker，实际中只会有一个在工作。
//daemonCli对象的创建请见docker/daemon.go中的daemonCli cli.Handler = NewDaemonCli()
//cli.New接受两个参数，分别是dockercli对象和daemoncli对象，两个对象结构不同。
//但是返回的是一个cli对象:
/*
type Cli struct {
Stderr io.Writer
handlers []Handler
Usage func()
}
*/
//clientClie和daemoncli就放在句柄handlers数组中。
c := cli.New(clientCli, daemonCli)
//c.Run函数见cli中的cli.go的func (cli *Cli) Run(args ...string) error
if err := c.Run(flag.Args()...); err != nil {
if sterr, ok := err.(cli.StatusError); ok {
if sterr.Status != "" {
fmt.Fprintln(stderr, sterr.Status)
os.Exit(1)
}
os.Exit(sterr.StatusCode)
}
fmt.Fprintln(stderr, err)
os.Exit(1)
}
}
// TODO rewrite this whole PoC
func main() {
flag.Usage = func() {
flag.PrintDefaults()
}
flag.Parse()
if debug {
os.Setenv("DEBUG", "1")
log.SetLevel(log.DebugLevel)
}
if flag.NArg() == 0 {
fmt.Println("ERROR: no image names provided")
flag.Usage()
os.Exit(1)
}
// make tempDir
tempDir, err := ioutil.TempDir("", "docker-fetch-")
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
defer os.RemoveAll(tempDir)
fetcher := NewFetcher(tempDir)
sc := registry.NewServiceConfig(rOptions)
for _, arg := range flag.Args() {
remote, tagName := parsers.ParseRepositoryTag(arg)
if tagName == "" {
tagName = "latest"
}
repInfo, err := sc.NewRepositoryInfo(remote)
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
log.Debugf("%#v %q\n", repInfo, tagName)
idx, err := repInfo.GetEndpoint()
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
fmt.Fprintf(os.Stderr, "Pulling %s:%s from %s\n", repInfo.RemoteName, tagName, idx)
var session *registry.Session
if s, ok := fetcher.sessions[idx.String()]; ok {
session = s
} else {
// TODO(vbatts) obviously the auth and http factory shouldn't be nil here
session, err = registry.NewSession(nil, nil, idx, timeout)
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
}
rd, err := session.GetRepositoryData(repInfo.RemoteName)
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
log.Debugf("rd: %#v", rd)
// produce the "repositories" file for the archive
if _, ok := fetcher.repositories[repInfo.RemoteName]; !ok {
fetcher.repositories[repInfo.RemoteName] = graph.Repository{}
}
log.Debugf("repositories: %#v", fetcher.repositories)
if len(rd.Endpoints) == 0 {
log.Fatalf("expected registry endpoints, but received none from the index")
}
tags, err := session.GetRemoteTags(rd.Endpoints, repInfo.RemoteName, rd.Tokens)
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
if hash, ok := tags[tagName]; ok {
fetcher.repositories[repInfo.RemoteName][tagName] = hash
}
log.Debugf("repositories: %#v", fetcher.repositories)
imgList, err := session.GetRemoteHistory(fetcher.repositories[repInfo.RemoteName][tagName], rd.Endpoints[0], rd.Tokens)
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
log.Debugf("imgList: %#v", imgList)
for _, imgID := range imgList {
// pull layers and jsons
buf, _, err := session.GetRemoteImageJSON(imgID, rd.Endpoints[0], rd.Tokens)
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
if err = os.MkdirAll(filepath.Join(fetcher.Root, imgID), 0755); err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
fh, err := os.Create(filepath.Join(fetcher.Root, imgID, "json"))
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
if _, err = fh.Write(buf); err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
fh.Close()
log.Debugf("%s", fh.Name())
tarRdr, err := session.GetRemoteImageLayer(imgID, rd.Endpoints[0], rd.Tokens, 0)
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
fh, err = os.Create(filepath.Join(fetcher.Root, imgID, "layer.tar"))
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
// the body is usually compressed
gzRdr, err := gzip.NewReader(tarRdr)
if err != nil {
log.Debugf("image layer for %q is not gzipped", imgID)
// the archive may not be gzipped, so just copy the stream
if _, err = io.Copy(fh, tarRdr); err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
} else {
// no error, so gzip decompress the stream
if _, err = io.Copy(fh, gzRdr); err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
if err = gzRdr.Close(); err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
}
if err = tarRdr.Close(); err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
if err = fh.Close(); err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
log.Debugf("%s", fh.Name())
}
}
// marshal the "repositories" file for writing out
log.Debugf("repositories: %q", fetcher.repositories)
buf, err := json.Marshal(fetcher.repositories)
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
fh, err := os.Create(filepath.Join(fetcher.Root, "repositories"))
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
if _, err = fh.Write(buf); err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
fh.Close()
log.Debugf("%s", fh.Name())
var output io.WriteCloser
if outputStream == "-" {
output = os.Stdout
} else {
output, err = os.Create(outputStream)
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
}
defer output.Close()
if err = os.Chdir(fetcher.Root); err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
tarStream, err := archive.Tar(".", archive.Uncompressed)
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
if _, err = io.Copy(output, tarStream); err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
}
func main() {
// Set terminal emulation based on platform as required.
stdin, stdout, stderr := term.StdStreams()
logrus.SetOutput(stderr)
flag.Merge(flag.CommandLine, clientFlags.FlagSet, commonFlags.FlagSet)
cobraAdaptor := cobraadaptor.NewCobraAdaptor(clientFlags)
flag.Usage = func() {
fmt.Fprint(stdout, "Usage: docker [OPTIONS] COMMAND [arg...]\n docker [ --help | -v | --version ]\n\n")
fmt.Fprint(stdout, "A self-sufficient runtime for containers.\n\nOptions:\n")
flag.CommandLine.SetOutput(stdout)
flag.PrintDefaults()
help := "\nCommands:\n"
dockerCommands := append(cli.DockerCommandUsage, cobraAdaptor.Usage()...)
for _, cmd := range sortCommands(dockerCommands) {
help += fmt.Sprintf(" %-10.10s%s\n", cmd.Name, cmd.Description)
}
help += "\nRun 'docker COMMAND --help' for more information on a command."
fmt.Fprintf(stdout, "%s\n", help)
}
flag.Parse()
if *flVersion {
showVersion()
return
}
if *flHelp {
// if global flag --help is present, regardless of what other options and commands there are,
// just print the usage.
flag.Usage()
return
}
clientCli := client.NewDockerCli(stdin, stdout, stderr, clientFlags)
c := cli.New(clientCli, NewDaemonProxy(), cobraAdaptor)
if err := c.Run(flag.Args()...); err != nil {
if sterr, ok := err.(cli.StatusError); ok {
if sterr.Status != "" {
fmt.Fprintln(stderr, sterr.Status)
}
// StatusError should only be used for errors, and all errors should
// have a non-zero exit status, so never exit with 0
if sterr.StatusCode == 0 {
os.Exit(1)
}
os.Exit(sterr.StatusCode)
}
fmt.Fprintln(stderr, err)
os.Exit(1)
}
}
func main() {
flag.Usage = func() {
flag.PrintDefaults()
}
flag.Parse()
if debug {
os.Setenv("DEBUG", "1")
logrus.SetLevel(logrus.DebugLevel)
}
if flag.NArg() == 0 {
flag.Usage()
logrus.Fatal("no image names provided")
}
// make temporary working directory
tempFetchRoot, err := ioutil.TempDir("", "docker-fetch-")
if err != nil {
logrus.Fatal(err)
}
refs := []*fetch.ImageRef{}
for _, arg := range flag.Args() {
ref := fetch.NewImageRef(arg)
fmt.Fprintf(os.Stderr, "Pulling %s\n", ref)
r := fetch.NewRegistry(ref.Host())
layersFetched, err := r.FetchLayers(ref, tempFetchRoot)
if err != nil {
logrus.Errorf("failed pulling %s, skipping: %s", ref, err)
continue
}
logrus.Debugf("fetched %d layers for %s", len(layersFetched), ref)
refs = append(refs, ref)
}
// marshal the "repositories" file for writing out
buf, err := fetch.FormatRepositories(refs...)
if err != nil {
logrus.Fatal(err)
}
fh, err := os.Create(filepath.Join(tempFetchRoot, "repositories"))
if err != nil {
logrus.Fatal(err)
}
if _, err = fh.Write(buf); err != nil {
logrus.Fatal(err)
}
fh.Close()
logrus.Debugf("%s", fh.Name())
var output io.WriteCloser
if outputStream == "-" {
output = os.Stdout
} else {
output, err = os.Create(outputStream)
if err != nil {
logrus.Fatal(err)
}
}
defer output.Close()
if err = os.Chdir(tempFetchRoot); err != nil {
logrus.Fatal(err)
}
tarStream, err := archive.Tar(".", archive.Uncompressed)
if err != nil {
logrus.Fatal(err)
}
if _, err = io.Copy(output, tarStream); err != nil {
logrus.Fatal(err)
}
}