snappy config does not work from stdin

[Michał Sawicz]

snappy config --help says:

"The configuration is a YAML file, provided in the specified file which can be "-" for stdin."

But:

$ snappy config ubuntu-core -

Just ignores the "-" and goes on displaying the config.

[Michał Sawicz (saviq)]

Apparently piping into the command works, it just doesn't wait for typing:

$ snappy config ubuntu-core
config:
  ubuntu-core:
    autopilot: false
    timezone: UTC
    hostname: localhost.localdomain

$ snappy config ubuntu-core - <(echo -e 'config:\n ubuntu-core:\n timezone: Europe/Berlin\n')
config:
  ubuntu-core:
    autopilot: false
    timezone: Europe/Berlin
    hostname: localhost.localdomain

Whether that's a bug, issue in the documentation, or PEBKAC, I'll leave to you.

[John Lenton (chipaca)]

try “snappy config ubuntu-core -- -”.

On 8 July 2015 at 22:20, Michał Sawicz <email address hidden> wrote:
> Public bug reported:
>
> snappy config --help says:
>
> "The configuration is a YAML file, provided in the specified file which
> can be "-" for stdin."
>
> But:
>
> $ snappy config ubuntu-core -
>
> Just ignores the "-" and goes on displaying the config.
>
> ** Affects: snappy
> Importance: Undecided
> Status: New
>
> --
> You received this bug notification because you are a member of Snappy
> Developers, which is subscribed to Snappy.
> https://bugs.launchpad.net/bugs/1472788
>
> Title:
> snappy config does not work from stdin
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/snappy/+bug/1472788/+subscriptions

[Michał Sawicz (saviq)]

How'd you come up with that? ;)

Something needs fixing - either docs or implementation.

[John Lenton (chipaca)]

standard "end of flags" flag?

On 10 July 2015 at 00:47, Michał Sawicz <email address hidden> wrote:
> How'd you come up with that? ;)
>
> Something needs fixing - either docs or implementation.
>
> --
> You received this bug notification because you are a member of Snappy
> Developers, which is subscribed to Snappy.
> https://bugs.launchpad.net/bugs/1472788
>
> Title:
> snappy config does not work from stdin
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/snappy/+bug/1472788/+subscriptions

[Michał Sawicz (saviq)]

W dniu 10.07.2015 o 11:07, John Lenton pisze:
> standard "end of flags" flag?

Sure, I get that, but is this actually appropriate here? --help says
that "-" can be used in place of a file name, and it can – when piping
stdin. I just mean that even if what you wrote is working, it's not
documented, and not intuitive. Usually when you can use "-" in place of
stdin, it will work with either piping or console input. With no -- in
between.

[John Lenton (chipaca)]

I wasn't challenging the bug; the bug is real. But you asked me how I came up with the fact that -- - works... :-)

[Leo Arias (elopio)]

This seems to be working now:

ubuntu@localhost:~$ snappy config ubuntu-core -
config:
  ubuntu-core:
    timezone: Europe/Berlin

unable to create /etc/localtime: open /etc/localtime: read-only file system
ubuntu@localhost:~$ snappy config ubuntu-core
config:
  ubuntu-core:
    autoupdate: false
    timezone: Etc/UTC
[...]

Of course, there's a bug in there, but we can track that in #1472802.