Golang stringutils.Truncate函数代码示例

// CmdSearch searches the Docker Hub for images.
//
// Usage: docker search [OPTIONS] TERM
func (cli *DockerCli) CmdSearch(args ...string) error {
	cmd := cli.Subcmd("search", []string{"TERM"}, "Search the Docker Hub for images", true)
	noTrunc := cmd.Bool([]string{"#notrunc", "-no-trunc"}, false, "Don't truncate output")
	trusted := cmd.Bool([]string{"#t", "#trusted", "#-trusted"}, false, "Only show trusted builds")
	automated := cmd.Bool([]string{"-automated"}, false, "Only show automated builds")
	stars := cmd.Uint([]string{"s", "#stars", "-stars"}, 0, "Only displays with at least x stars")
	cmd.Require(flag.Exact, 1)

	cmd.ParseFlags(args, true)

	name := cmd.Arg(0)
	v := url.Values{}
	v.Set("term", name)

	// Resolve the Repository name from fqn to hostname + name
	taglessRemote, _ := parsers.ParseRepositoryTag(name)
	repoInfo, err := registry.ParseRepositoryInfo(taglessRemote)
	if err != nil {
		return err
	}

	rdr, _, err := cli.clientRequestAttemptLogin("GET", "/images/search?"+v.Encode(), nil, nil, repoInfo.Index, "search")
	if err != nil {
		return err
	}

	defer rdr.Close()

	results := ByStars{}
	if err := json.NewDecoder(rdr).Decode(&results); err != nil {
		return err
	}

	sort.Sort(sort.Reverse(results))

	w := tabwriter.NewWriter(cli.out, 10, 1, 3, ' ', 0)
	fmt.Fprintf(w, "NAME\tDESCRIPTION\tSTARS\tOFFICIAL\tAUTOMATED\n")
	for _, res := range results {
		if ((*automated || *trusted) && (!res.IsTrusted && !res.IsAutomated)) || (int(*stars) > res.StarCount) {
			continue
		}
		desc := strings.Replace(res.Description, "\n", " ", -1)
		desc = strings.Replace(desc, "\r", " ", -1)
		if !*noTrunc && len(desc) > 45 {
			desc = stringutils.Truncate(desc, 42) + "..."
		}
		fmt.Fprintf(w, "%s\t%s\t%d\t", res.Name, desc, res.StarCount)
		if res.IsOfficial {
			fmt.Fprint(w, "[OK]")

		}
		fmt.Fprint(w, "\t")
		if res.IsAutomated || res.IsTrusted {
			fmt.Fprint(w, "[OK]")
		}
		fmt.Fprint(w, "\n")
	}
	w.Flush()
	return nil
}

func (c *containerContext) Command() string {
	c.addHeader(commandHeader)
	command := c.c.Command
	if c.trunc {
		command = stringutils.Truncate(command, 20)
	}
	return strconv.Quote(command)
}

// CmdHistory shows the history of an image.
//
// Usage: docker history [OPTIONS] IMAGE
func (cli *DockerCli) CmdHistory(args ...string) error {
	cmd := Cli.Subcmd("history", []string{"IMAGE"}, Cli.DockerCommands["history"].Description, true)
	human := cmd.Bool([]string{"H", "-human"}, true, "Print sizes and dates in human readable format")
	quiet := cmd.Bool([]string{"q", "-quiet"}, false, "Only show numeric IDs")
	noTrunc := cmd.Bool([]string{"#notrunc", "-no-trunc"}, false, "Don't truncate output")
	cmd.Require(flag.Exact, 1)

	cmd.ParseFlags(args, true)

	serverResp, err := cli.call("GET", "/images/"+cmd.Arg(0)+"/history", nil, nil)
	if err != nil {
		return err
	}

	defer serverResp.body.Close()

	history := []types.ImageHistory{}
	if err := json.NewDecoder(serverResp.body).Decode(&history); err != nil {
		return err
	}

	w := tabwriter.NewWriter(cli.out, 20, 1, 3, ' ', 0)
	if !*quiet {
		fmt.Fprintln(w, "IMAGE\tCREATED\tCREATED BY\tSIZE\tCOMMENT")
	}

	for _, entry := range history {
		if *noTrunc {
			fmt.Fprintf(w, entry.ID)
		} else {
			fmt.Fprintf(w, stringid.TruncateID(entry.ID))
		}
		if !*quiet {
			if *human {
				fmt.Fprintf(w, "\t%s ago\t", units.HumanDuration(time.Now().UTC().Sub(time.Unix(entry.Created, 0))))
			} else {
				fmt.Fprintf(w, "\t%s\t", time.Unix(entry.Created, 0).Format(time.RFC3339))
			}

			if *noTrunc {
				fmt.Fprintf(w, "%s\t", strings.Replace(entry.CreatedBy, "\t", " ", -1))
			} else {
				fmt.Fprintf(w, "%s\t", stringutils.Truncate(strings.Replace(entry.CreatedBy, "\t", " ", -1), 45))
			}

			if *human {
				fmt.Fprintf(w, "%s\t", units.HumanSize(float64(entry.Size)))
			} else {
				fmt.Fprintf(w, "%d\t", entry.Size)
			}

			fmt.Fprintf(w, "%s", entry.Comment)
		}
		fmt.Fprintf(w, "\n")
	}
	w.Flush()
	return nil
}

func (c *containerContext) Image() string {
	c.addHeader(imageHeader)
	if c.c.Image == "" {
		return "<no image>"
	}
	if c.trunc {
		return stringutils.Truncate(c.c.Image, 12)
	}
	return c.c.Image
}

// CmdHistory shows the history of an image.
//
// Usage: docker history [OPTIONS] IMAGE
func (cli *DockerCli) CmdHistory(args ...string) error {
	cmd := Cli.Subcmd("history", []string{"IMAGE"}, Cli.DockerCommands["history"].Description, true)
	human := cmd.Bool([]string{"H", "-human"}, true, "Print sizes and dates in human readable format")
	quiet := cmd.Bool([]string{"q", "-quiet"}, false, "Only show numeric IDs")
	noTrunc := cmd.Bool([]string{"-no-trunc"}, false, "Don't truncate output")
	cmd.Require(flag.Exact, 1)

	cmd.ParseFlags(args, true)

	history, err := cli.client.ImageHistory(cmd.Arg(0))
	if err != nil {
		return err
	}

	w := tabwriter.NewWriter(cli.out, 20, 1, 3, ' ', 0)

	if *quiet {
		for _, entry := range history {
			if *noTrunc {
				fmt.Fprintf(w, "%s\n", entry.ID)
			} else {
				fmt.Fprintf(w, "%s\n", stringid.TruncateID(entry.ID))
			}
		}
		w.Flush()
		return nil
	}

	var imageID string
	var createdBy string
	var created string
	var size string

	fmt.Fprintln(w, "IMAGE\tCREATED\tCREATED BY\tSIZE\tCOMMENT")
	for _, entry := range history {
		imageID = entry.ID
		createdBy = strings.Replace(entry.CreatedBy, "\t", " ", -1)
		if *noTrunc == false {
			createdBy = stringutils.Truncate(createdBy, 45)
			imageID = stringid.TruncateID(entry.ID)
		}

		if *human {
			created = units.HumanDuration(time.Now().UTC().Sub(time.Unix(entry.Created, 0))) + " ago"
			size = units.HumanSize(float64(entry.Size))
		} else {
			created = time.Unix(entry.Created, 0).Format(time.RFC3339)
			size = strconv.FormatInt(entry.Size, 10)
		}

		fmt.Fprintf(w, "%s\t%s\t%s\t%s\t%s\n", imageID, created, createdBy, size, entry.Comment)
	}
	w.Flush()
	return nil
}

func (c *containerContext) Mounts() string {
	c.addHeader(mountsHeader)

	var mounts []string
	for _, m := range c.c.Mounts {
		name := m.Name
		if c.trunc {
			name = stringutils.Truncate(name, 15)
		}
		mounts = append(mounts, name)
	}
	return strings.Join(mounts, ",")
}

func runHistory(dockerCli *client.DockerCli, opts historyOptions) error {
	ctx := context.Background()

	history, err := dockerCli.Client().ImageHistory(ctx, opts.image)
	if err != nil {
		return err
	}

	w := tabwriter.NewWriter(dockerCli.Out(), 20, 1, 3, ' ', 0)

	if opts.quiet {
		for _, entry := range history {
			if opts.noTrunc {
				fmt.Fprintf(w, "%s\n", entry.ID)
			} else {
				fmt.Fprintf(w, "%s\n", stringid.TruncateID(entry.ID))
			}
		}
		w.Flush()
		return nil
	}

	var imageID string
	var createdBy string
	var created string
	var size string

	fmt.Fprintln(w, "IMAGE\tCREATED\tCREATED BY\tSIZE\tCOMMENT")
	for _, entry := range history {
		imageID = entry.ID
		createdBy = strings.Replace(entry.CreatedBy, "\t", " ", -1)
		if opts.noTrunc == false {
			createdBy = stringutils.Truncate(createdBy, 45)
			imageID = stringid.TruncateID(entry.ID)
		}

		if opts.human {
			created = units.HumanDuration(time.Now().UTC().Sub(time.Unix(entry.Created, 0))) + " ago"
			size = units.HumanSize(float64(entry.Size))
		} else {
			created = time.Unix(entry.Created, 0).Format(time.RFC3339)
			size = strconv.FormatInt(entry.Size, 10)
		}

		fmt.Fprintf(w, "%s\t%s\t%s\t%s\t%s\n", imageID, created, createdBy, size, entry.Comment)
	}
	w.Flush()
	return nil
}

// CmdHistory shows the history of an image.
//
// Usage: docker history [OPTIONS] IMAGE
func (cli *DockerCli) CmdHistory(args ...string) error {
	cmd := cli.Subcmd("history", "IMAGE", "Show the history of an image", true)
	quiet := cmd.Bool([]string{"q", "-quiet"}, false, "Only show numeric IDs")
	noTrunc := cmd.Bool([]string{"#notrunc", "-no-trunc"}, false, "Don't truncate output")
	cmd.Require(flag.Exact, 1)
	cmd.ParseFlags(args, true)

	rdr, _, err := cli.call("GET", "/images/"+cmd.Arg(0)+"/history", nil, nil)
	if err != nil {
		return err
	}

	history := []types.ImageHistory{}
	err = json.NewDecoder(rdr).Decode(&history)
	if err != nil {
		return err
	}

	w := tabwriter.NewWriter(cli.out, 20, 1, 3, ' ', 0)
	if !*quiet {
		fmt.Fprintln(w, "IMAGE\tCREATED\tCREATED BY\tSIZE\tCOMMENT")
	}

	for _, entry := range history {
		if *noTrunc {
			fmt.Fprintf(w, entry.ID)
		} else {
			fmt.Fprintf(w, stringid.TruncateID(entry.ID))
		}
		if !*quiet {
			fmt.Fprintf(w, "\t%s ago\t", units.HumanDuration(time.Now().UTC().Sub(time.Unix(entry.Created, 0))))

			if *noTrunc {
				fmt.Fprintf(w, "%s\t", entry.CreatedBy)
			} else {
				fmt.Fprintf(w, "%s\t", stringutils.Truncate(entry.CreatedBy, 45))
			}
			fmt.Fprintf(w, "%s\t", units.HumanSize(float64(entry.Size)))
			fmt.Fprintf(w, "%s", entry.Comment)
		}
		fmt.Fprintf(w, "\n")
	}
	w.Flush()
	return nil
}

// CmdSearch searches the Docker Hub for images.
//
// Usage: docker search [OPTIONS] TERM
func (cli *DockerCli) CmdSearch(args ...string) error {
	cmd := Cli.Subcmd("search", []string{"TERM"}, Cli.DockerCommands["search"].Description, true)
	noTrunc := cmd.Bool([]string{"-no-trunc"}, false, "Don't truncate output")
	automated := cmd.Bool([]string{"-automated"}, false, "Only show automated builds")
	stars := cmd.Uint([]string{"s", "-stars"}, 0, "Only displays with at least x stars")
	cmd.Require(flag.Exact, 1)

	cmd.ParseFlags(args, true)

	name := cmd.Arg(0)
	v := url.Values{}
	v.Set("term", name)

	indexInfo, err := registry.ParseSearchIndexInfo(name)
	if err != nil {
		return err
	}

	authConfig := registry.ResolveAuthConfig(cli.configFile.AuthConfigs, indexInfo)
	requestPrivilege := cli.registryAuthenticationPrivilegedFunc(indexInfo, "search")

	encodedAuth, err := encodeAuthToBase64(authConfig)
	if err != nil {
		return err
	}

	options := types.ImageSearchOptions{
		Term:         name,
		RegistryAuth: encodedAuth,
	}

	unorderedResults, err := cli.client.ImageSearch(options, requestPrivilege)
	if err != nil {
		return err
	}

	results := searchResultsByStars(unorderedResults)
	sort.Sort(results)

	w := tabwriter.NewWriter(cli.out, 10, 1, 3, ' ', 0)
	fmt.Fprintf(w, "NAME\tDESCRIPTION\tSTARS\tOFFICIAL\tAUTOMATED\n")
	for _, res := range results {
		if (*automated && !res.IsAutomated) || (int(*stars) > res.StarCount) {
			continue
		}
		desc := strings.Replace(res.Description, "\n", " ", -1)
		desc = strings.Replace(desc, "\r", " ", -1)
		if !*noTrunc && len(desc) > 45 {
			desc = stringutils.Truncate(desc, 42) + "..."
		}
		fmt.Fprintf(w, "%s\t%s\t%d\t", res.Name, desc, res.StarCount)
		if res.IsOfficial {
			fmt.Fprint(w, "[OK]")

		}
		fmt.Fprint(w, "\t")
		if res.IsAutomated || res.IsTrusted {
			fmt.Fprint(w, "[OK]")
		}
		fmt.Fprint(w, "\n")
	}
	w.Flush()
	return nil
}

//.........这里部分代码省略.........

		v.Set("filters", filterJSON)
	}

	serverResp, err := cli.call("GET", "/containers/json?"+v.Encode(), nil, nil)
	if err != nil {
		return err
	}

	defer serverResp.body.Close()

	containers := []types.Container{}
	if err := json.NewDecoder(serverResp.body).Decode(&containers); err != nil {
		return err
	}

	w := tabwriter.NewWriter(cli.out, 20, 1, 3, ' ', 0)
	if !*quiet {
		fmt.Fprint(w, "CONTAINER ID\tIMAGE\tCOMMAND\tCREATED\tSTATUS\tPORTS\tNAMES")

		if *size {
			fmt.Fprintln(w, "\tSIZE")
		} else {
			fmt.Fprint(w, "\n")
		}
	}

	stripNamePrefix := func(ss []string) []string {
		for i, s := range ss {
			ss[i] = s[1:]
		}

		return ss
	}

	for _, container := range containers {
		ID := container.ID

		if !*noTrunc {
			ID = stringid.TruncateID(ID)
		}

		if *quiet {
			fmt.Fprintln(w, ID)

			continue
		}

		var (
			names       = stripNamePrefix(container.Names)
			command     = strconv.Quote(container.Command)
			displayPort string
		)

		if !*noTrunc {
			command = stringutils.Truncate(command, 20)

			// only display the default name for the container with notrunc is passed
			for _, name := range names {
				if len(strings.Split(name, "/")) == 1 {
					names = []string{name}
					break
				}
			}
		}

		image := container.Image
		if image == "" {
			image = "<no image>"
		}

		if container.HostConfig.NetworkMode == "host" {
			displayPort = "*/tcp, */udp"
		} else {
			displayPort = api.DisplayablePorts(container.Ports)
		}

		fmt.Fprintf(w, "%s\t%s\t%s\t%s ago\t%s\t%s\t%s\t", ID, image, command,
			units.HumanDuration(time.Now().UTC().Sub(time.Unix(int64(container.Created), 0))),
			container.Status, displayPort, strings.Join(names, ","))

		if *size {
			if container.SizeRootFs > 0 {
				fmt.Fprintf(w, "%s (virtual %s)\n", units.HumanSize(float64(container.SizeRw)), units.HumanSize(float64(container.SizeRootFs)))
			} else {
				fmt.Fprintf(w, "%s\n", units.HumanSize(float64(container.SizeRw)))
			}

			continue
		}

		fmt.Fprint(w, "\n")
	}

	if !*quiet {
		w.Flush()
	}

	return nil
}

func runSearch(dockerCli *client.DockerCli, opts searchOptions) error {
	indexInfo, err := registry.ParseSearchIndexInfo(opts.term)
	if err != nil {
		return err
	}

	ctx := context.Background()

	authConfig := dockerCli.ResolveAuthConfig(ctx, indexInfo)
	requestPrivilege := dockerCli.RegistryAuthenticationPrivilegedFunc(indexInfo, "search")

	encodedAuth, err := client.EncodeAuthToBase64(authConfig)
	if err != nil {
		return err
	}

	searchFilters := filters.NewArgs()
	for _, f := range opts.filter {
		var err error
		searchFilters, err = filters.ParseFlag(f, searchFilters)
		if err != nil {
			return err
		}
	}

	options := types.ImageSearchOptions{
		RegistryAuth:  encodedAuth,
		PrivilegeFunc: requestPrivilege,
		Filters:       searchFilters,
		Limit:         opts.limit,
	}

	clnt := dockerCli.Client()

	unorderedResults, err := clnt.ImageSearch(ctx, opts.term, options)
	if err != nil {
		return err
	}

	results := searchResultsByStars(unorderedResults)
	sort.Sort(results)

	w := tabwriter.NewWriter(dockerCli.Out(), 10, 1, 3, ' ', 0)
	fmt.Fprintf(w, "NAME\tDESCRIPTION\tSTARS\tOFFICIAL\tAUTOMATED\n")
	for _, res := range results {
		// --automated and -s, --stars are deprecated since Docker 1.12
		if (opts.automated && !res.IsAutomated) || (int(opts.stars) > res.StarCount) {
			continue
		}
		desc := strings.Replace(res.Description, "\n", " ", -1)
		desc = strings.Replace(desc, "\r", " ", -1)
		if !opts.noTrunc && len(desc) > 45 {
			desc = stringutils.Truncate(desc, 42) + "..."
		}
		fmt.Fprintf(w, "%s\t%s\t%d\t", res.Name, desc, res.StarCount)
		if res.IsOfficial {
			fmt.Fprint(w, "[OK]")

		}
		fmt.Fprint(w, "\t")
		if res.IsAutomated {
			fmt.Fprint(w, "[OK]")
		}
		fmt.Fprint(w, "\n")
	}
	w.Flush()
	return nil
}

// CmdSearch searches the Docker Hub for images.
//
// Usage: docker search [OPTIONS] TERM
func (cli *DockerCli) CmdSearch(args ...string) error {
	var (
		err error

		filterArgs = filters.NewArgs()

		flFilter = opts.NewListOpts(nil)
	)

	cmd := Cli.Subcmd("search", []string{"TERM"}, Cli.DockerCommands["search"].Description, true)
	noTrunc := cmd.Bool([]string{"-no-trunc"}, false, "Don't truncate output")
	cmd.Var(&flFilter, []string{"f", "-filter"}, "Filter output based on conditions provided")

	// Deprecated since Docker 1.12 in favor of "--filter"
	automated := cmd.Bool([]string{"#-automated"}, false, "Only show automated builds - DEPRECATED")
	stars := cmd.Uint([]string{"s", "#-stars"}, 0, "Only displays with at least x stars - DEPRECATED")

	cmd.Require(flag.Exact, 1)

	cmd.ParseFlags(args, true)

	for _, f := range flFilter.GetAll() {
		if filterArgs, err = filters.ParseFlag(f, filterArgs); err != nil {
			return err
		}
	}

	name := cmd.Arg(0)
	v := url.Values{}
	v.Set("term", name)

	indexInfo, err := registry.ParseSearchIndexInfo(name)
	if err != nil {
		return err
	}

	ctx := context.Background()

	authConfig := cli.resolveAuthConfig(ctx, indexInfo)
	requestPrivilege := cli.registryAuthenticationPrivilegedFunc(indexInfo, "search")

	encodedAuth, err := encodeAuthToBase64(authConfig)
	if err != nil {
		return err
	}

	options := types.ImageSearchOptions{
		RegistryAuth:  encodedAuth,
		PrivilegeFunc: requestPrivilege,
		Filters:       filterArgs,
	}

	unorderedResults, err := cli.client.ImageSearch(ctx, name, options)
	if err != nil {
		return err
	}

	results := searchResultsByStars(unorderedResults)
	sort.Sort(results)

	w := tabwriter.NewWriter(cli.out, 10, 1, 3, ' ', 0)
	fmt.Fprintf(w, "NAME\tDESCRIPTION\tSTARS\tOFFICIAL\tAUTOMATED\n")
	for _, res := range results {
		// --automated and -s, --stars are deprecated since Docker 1.12
		if (*automated && !res.IsAutomated) || (int(*stars) > res.StarCount) {
			continue
		}
		desc := strings.Replace(res.Description, "\n", " ", -1)
		desc = strings.Replace(desc, "\r", " ", -1)
		if !*noTrunc && len(desc) > 45 {
			desc = stringutils.Truncate(desc, 42) + "..."
		}
		fmt.Fprintf(w, "%s\t%s\t%d\t", res.Name, desc, res.StarCount)
		if res.IsOfficial {
			fmt.Fprint(w, "[OK]")

		}
		fmt.Fprint(w, "\t")
		if res.IsAutomated {
			fmt.Fprint(w, "[OK]")
		}
		fmt.Fprint(w, "\n")
	}
	w.Flush()
	return nil
}