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5aa5a1cb00
This fix tries to address the issue raised in 24352. Previously, when `docker swarm update` has no flags, the output is ``` Swarm updated. ``` even though nothing was updated. This could be misleading for users. This fix tries to address the issue by adding a `PreRunE` function in the command so that in case no flag is provided (`cmd.Flags().NFlag() == 0`), the usage will be outputed instead. An integration has been added to cover the changes. This fix fixes 24352. Signed-off-by: Yong Tang <yong.tang.github@outlook.com>
72 lines
1.7 KiB
Go
72 lines
1.7 KiB
Go
package swarm
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import (
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"fmt"
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"golang.org/x/net/context"
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"github.com/docker/docker/api/types/swarm"
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"github.com/docker/docker/cli"
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"github.com/docker/docker/cli/command"
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"github.com/pkg/errors"
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"github.com/spf13/cobra"
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"github.com/spf13/pflag"
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)
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func newUpdateCommand(dockerCli *command.DockerCli) *cobra.Command {
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opts := swarmOptions{}
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cmd := &cobra.Command{
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Use: "update [OPTIONS]",
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Short: "Update the swarm",
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Args: cli.NoArgs,
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RunE: func(cmd *cobra.Command, args []string) error {
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return runUpdate(dockerCli, cmd.Flags(), opts)
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},
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PreRunE: func(cmd *cobra.Command, args []string) error {
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if cmd.Flags().NFlag() == 0 {
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return pflag.ErrHelp
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}
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return nil
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},
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}
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cmd.Flags().BoolVar(&opts.autolock, flagAutolock, false, "Change manager autolocking setting (true|false)")
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addSwarmFlags(cmd.Flags(), &opts)
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return cmd
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}
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func runUpdate(dockerCli *command.DockerCli, flags *pflag.FlagSet, opts swarmOptions) error {
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client := dockerCli.Client()
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ctx := context.Background()
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var updateFlags swarm.UpdateFlags
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swarm, err := client.SwarmInspect(ctx)
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if err != nil {
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return err
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}
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prevAutoLock := swarm.Spec.EncryptionConfig.AutoLockManagers
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opts.mergeSwarmSpec(&swarm.Spec, flags)
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curAutoLock := swarm.Spec.EncryptionConfig.AutoLockManagers
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err = client.SwarmUpdate(ctx, swarm.Version, swarm.Spec, updateFlags)
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if err != nil {
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return err
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}
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fmt.Fprintln(dockerCli.Out(), "Swarm updated.")
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if curAutoLock && !prevAutoLock {
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unlockKeyResp, err := client.SwarmGetUnlockKey(ctx)
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if err != nil {
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return errors.Wrap(err, "could not fetch unlock key")
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}
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printUnlockCommand(ctx, dockerCli, unlockKeyResp.UnlockKey)
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}
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return nil
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}
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