mirror of
https://github.com/podman-container-tools/podman.git
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d81021ed26
The --format flags accepts go template strings. I use this often but I
consistently forget the field names. This commit adds a way to provide
shell completion for the --format flag. It works by automatically
receiving the field names with the reflect package from the given
struct. This requires almost no maintenance since this ensures that we
always use the correct field names. This also works for nested structs.
```
$ podman ps --format "{{.P"
{{.Pid}} {{.PIDNS}} {{.Pod}} {{.PodName}} {{.Ports}}
```
NOTE: This only works when you use quotes otherwise the shell does not
provide completions. Also this does not work for fish at the moment.
Signed-off-by: Paul Holzinger <paul.holzinger@web.de>
74 lines
2.2 KiB
Go
74 lines
2.2 KiB
Go
package containers
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import (
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"github.com/containers/common/pkg/report"
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"github.com/containers/podman/v3/cmd/podman/common"
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"github.com/containers/podman/v3/cmd/podman/registry"
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"github.com/containers/podman/v3/cmd/podman/validate"
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"github.com/containers/podman/v3/pkg/domain/entities"
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"github.com/pkg/errors"
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"github.com/spf13/cobra"
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)
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var (
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// podman container _diff_
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diffCmd = &cobra.Command{
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Use: "diff [options] CONTAINER",
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Args: validate.IDOrLatestArgs,
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Short: "Inspect changes to the container's file systems",
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Long: `Displays changes to the container filesystem's'. The container will be compared to its parent layer.`,
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RunE: diff,
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ValidArgsFunction: common.AutocompleteContainers,
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Example: `podman container diff myCtr
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podman container diff -l --format json myCtr`,
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}
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diffOpts *entities.DiffOptions
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)
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func init() {
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registry.Commands = append(registry.Commands, registry.CliCommand{
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Mode: []entities.EngineMode{entities.ABIMode, entities.TunnelMode},
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Command: diffCmd,
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Parent: containerCmd,
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})
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diffOpts = &entities.DiffOptions{}
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flags := diffCmd.Flags()
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flags.BoolVar(&diffOpts.Archive, "archive", true, "Save the diff as a tar archive")
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_ = flags.MarkHidden("archive")
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formatFlagName := "format"
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flags.StringVar(&diffOpts.Format, formatFlagName, "", "Change the output format")
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_ = diffCmd.RegisterFlagCompletionFunc(formatFlagName, common.AutocompleteFormat(nil))
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validate.AddLatestFlag(diffCmd, &diffOpts.Latest)
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}
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func diff(cmd *cobra.Command, args []string) error {
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if len(args) == 0 && !diffOpts.Latest {
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return errors.New("container must be specified: podman container diff [options [...]] ID-NAME")
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}
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var id string
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if len(args) > 0 {
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id = args[0]
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}
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results, err := registry.ContainerEngine().ContainerDiff(registry.GetContext(), id, *diffOpts)
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if err != nil {
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return err
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}
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switch {
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case report.IsJSON(diffOpts.Format):
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return common.ChangesToJSON(results)
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case diffOpts.Format == "":
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return common.ChangesToTable(results)
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default:
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return errors.New("only supported value for '--format' is 'json'")
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}
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}
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func Diff(cmd *cobra.Command, args []string, options entities.DiffOptions) error {
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diffOpts = &options
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return diff(cmd, args)
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}
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