Yong Tang 9c84f95c6e Show usage when docker swarm update has no flags ...

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>
Upstream-commit: 5aa5a1cb008963ee6a99011b8f7cd1f489e2bc6a
Component: engine

2016-12-13 05:05:04 -08:00

..

cmd.go

refactor help func in CLI

2016-11-17 10:54:10 -08:00

init.go

cli: Change autolock flag description

2016-11-10 12:05:19 -08:00

join_token.go

Fix bunch of typos

2016-10-29 15:03:26 +08:00

join.go

change join node role judge

2016-10-19 19:47:42 +08:00

leave.go

add short flag for force

2016-11-09 14:40:47 +08:00

opts_test.go

Move api/client -> cli/command

2016-09-08 15:46:29 -04:00

opts.go

fix description of 'docker swarm init'

2016-11-28 13:24:02 +09:00

unlock_key.go

Add unlock key rotation

2016-11-09 16:09:01 -08:00

unlock.go

use "golang.org/x/net/context" instead of "context"

2016-11-10 08:23:19 -08:00

update.go

Show usage when docker swarm update has no flags

2016-12-13 05:05:04 -08:00