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db23e12611
External containers are containers created outside of Podman. For example Buildah and CRI-O Containers. $ buildah from alpine alpine-working-container $ buildah run alpine-working-container touch /test $ podman container exists --external alpine-working-container $ podman container diff alpine-working-container C /etc A /test Added --external flag to refer to external containers, rather then --storage. Added --external for podman container exists and modified podman ps to use --external rather then --storage. It was felt that --storage would confuse the user into thinking about changing the storage driver or options. --storage is still supported through the use of aliases. Finally podman contianer diff, does not require the --external flag, since it there is little change of users making the mistake, and would just be a pain for the user to remember the flag. podman container exists --external is required because it could fool scripts that rely on the existance of a Podman container, and there is a potential for a partial deletion of a container, which could mess up existing users. Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
53 lines
1.5 KiB
Go
53 lines
1.5 KiB
Go
package containers
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import (
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"context"
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"github.com/containers/podman/v2/cmd/podman/registry"
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"github.com/containers/podman/v2/pkg/domain/entities"
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"github.com/spf13/cobra"
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)
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var (
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containerExistsDescription = `If the named container exists in local storage, podman container exists exits with 0, otherwise the exit code will be 1.`
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existsCommand = &cobra.Command{
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Use: "exists [flags] CONTAINER",
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Short: "Check if a container exists in local storage",
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Long: containerExistsDescription,
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Example: `podman container exists --external containerID
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podman container exists myctr || podman run --name myctr [etc...]`,
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RunE: exists,
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Args: cobra.ExactArgs(1),
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DisableFlagsInUseLine: true,
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}
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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: existsCommand,
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Parent: containerCmd,
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})
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flags := existsCommand.Flags()
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flags.Bool("external", false, "Check external storage containers as well as Podman containers")
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}
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func exists(cmd *cobra.Command, args []string) error {
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external, err := cmd.Flags().GetBool("external")
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if err != nil {
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return err
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}
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options := entities.ContainerExistsOptions{
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External: external,
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}
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response, err := registry.ContainerEngine().ContainerExists(context.Background(), args[0], options)
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if err != nil {
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return err
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}
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if !response.Value {
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registry.SetExitCode(1)
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}
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return nil
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}
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