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package images
import (
"context"
"fmt"
"os"
"strings"
"text/tabwriter"
"text/template"
"time"
"github.com/containers/libpod/cmd/podmanV2/registry"
"github.com/containers/libpod/cmd/podmanV2/report"
"github.com/containers/libpod/pkg/domain/entities"
jsoniter "github.com/json-iterator/go"
"github.com/pkg/errors"
"github.com/spf13/cobra"
)
var (
long = `Displays the history of an image.
The information can be printed out in an easy to read, or user specified format, and can be truncated.`
// podman _history_
historyCmd = &cobra.Command{
Use: "history [flags] IMAGE",
Short: "Show history of a specified image",
Long: long,
Example: "podman history quay.io/fedora/fedora",
Args: cobra.ExactArgs(1),
PersistentPreRunE: preRunE,
RunE: history,
}
opts = struct {
human bool
noTrunc bool
quiet bool
format string
}{}
)
func init() {
registry.Commands = append(registry.Commands, registry.CliCommand{
Mode: []entities.EngineMode{entities.ABIMode, entities.TunnelMode},
Command: historyCmd,
})
historyCmd.SetHelpTemplate(registry.HelpTemplate())
historyCmd.SetUsageTemplate(registry.UsageTemplate())
flags := historyCmd.Flags()
flags.StringVar(&opts.format, "format", "", "Change the output to JSON or a Go template")
flags.BoolVarP(&opts.human, "human", "H", false, "Display sizes and dates in human readable format")
flags.BoolVar(&opts.noTrunc, "no-trunc", false, "Do not truncate the output")
flags.BoolVar(&opts.noTrunc, "notruncate", false, "Do not truncate the output")
flags.BoolVarP(&opts.quiet, "quiet", "q", false, "Display the numeric IDs only")
}
func history(cmd *cobra.Command, args []string) error {
results, err := registry.ImageEngine().History(context.Background(), args[0], entities.ImageHistoryOptions{})
if err != nil {
return err
}
if opts.format == "json" {
var err error
if len(results.Layers) == 0 {
_, err = fmt.Fprintf(os.Stdout, "[]\n")
} else {
// ah-hoc change to "Created": type and format
type layer struct {
entities.ImageHistoryLayer
Created string `json:"Created"`
}
layers := make([]layer, len(results.Layers))
for i, l := range results.Layers {
layers[i].ImageHistoryLayer = l
layers[i].Created = time.Unix(l.Created, 0).Format(time.RFC3339)
}
json := jsoniter.ConfigCompatibleWithStandardLibrary
enc := json.NewEncoder(os.Stdout)
err = enc.Encode(layers)
}
return err
}
// Defaults
hdr := "ID\tCREATED\tCREATED BY\tSIZE\tCOMMENT\n"
row := "{{slice .ID 0 12}}\t{{humanDuration .Created}}\t{{ellipsis .CreatedBy 45}}\t{{.Size}}\t{{.Comment}}\n"
if len(opts.format) > 0 {
hdr = ""
row = opts.format
if !strings.HasSuffix(opts.format, "\n") {
row += "\n"
}
} else {
switch {
case opts.human:
row = "{{slice .ID 0 12}}\t{{humanDuration .Created}}\t{{ellipsis .CreatedBy 45}}\t{{humanSize .Size}}\t{{.Comment}}\n"
case opts.noTrunc:
row = "{{.ID}}\t{{humanDuration .Created}}\t{{.CreatedBy}}\t{{humanSize .Size}}\t{{.Comment}}\n"
case opts.quiet:
hdr = ""
row = "{{.ID}}\n"
}
}
format := hdr + "{{range . }}" + row + "{{end}}"
tmpl := template.Must(template.New("report").Funcs(report.PodmanTemplateFuncs()).Parse(format))
w := tabwriter.NewWriter(os.Stdout, 8, 2, 2, ' ', 0)
_, _ = w.Write(report.ReportHeader("id", "created", "created by", "size", "comment"))
err = tmpl.Execute(w, results.Layers)
if err != nil {
fmt.Fprintln(os.Stderr, errors.Wrapf(err, "Failed to print report"))
}
w.Flush()
return nil
}
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