Command "fuel --fuel-version" redirects content to stderr

[Yaroslav Lobankov]

VERSION:
  feature_groups:
    - mirantis
  production: "docker"
  release: "5.1.1"
  api: "1.0"
  build_number: "19"
  build_id: "2014-11-17_21-00-23"
  astute_sha: "fce051a6d013b1c30aa07320d225f9af734545de"
  fuellib_sha: "add3fdd3e2af57b20dbb73a6bc53a9ccc4701c9a"
  ostf_sha: "64cb59c681658a7a55cc2c09d079072a41beb346"
  nailgun_sha: "2fcab95dc43a248ba867065e96ab764ee73882d1"
  fuelmain_sha: "ff22ca819e6eb7c63b6d7978fdd80ef9b84457d9"

[root@fuel ~]# fuel --fuel-version | grep release
api: '1.0'
astute_sha: fce051a6d013b1c30aa07320d225f9af734545de
auth_required: true
build_id: 2014-11-17_21-00-23
build_number: '19'
feature_groups:
- mirantis
fuellib_sha: add3fdd3e2af57b20dbb73a6bc53a9ccc4701c9a
fuelmain_sha: ff22ca819e6eb7c63b6d7978fdd80ef9b84457d9
nailgun_sha: 2fcab95dc43a248ba867065e96ab764ee73882d1
ostf_sha: 64cb59c681658a7a55cc2c09d079072a41beb346
production: docker
release: 5.1.1
release_versions:
  2014.1.3-5.1.1:
    VERSION:
      api: '1.0'
      astute_sha: fce051a6d013b1c30aa07320d225f9af734545de
      build_id: 2014-11-17_21-00-23
      build_number: '19'
      feature_groups:
      - mirantis
      fuellib_sha: add3fdd3e2af57b20dbb73a6bc53a9ccc4701c9a
      fuelmain_sha: ff22ca819e6eb7c63b6d7978fdd80ef9b84457d9
      nailgun_sha: 2fcab95dc43a248ba867065e96ab764ee73882d1
      ostf_sha: 64cb59c681658a7a55cc2c09d079072a41beb346
      production: docker
      release: 5.1.1

[root@fuel ~]# fuel --fuel-version 2>&1 | grep release
release: 5.1.1
release_versions:
      release: 5.1.1

[Thomas Goirand (thomas-goirand)]

How is this supposed to be a bug?

[Dima Shulyak (dshulyak)]

Thomas, maybe i am missing something, but usually command line apps output goes to stdout (1 fd), and for example fuel env output will go to the stdout as well, but fuel --fuel-version for some reason redirected to stderr

[Bartłomiej Piotrowski (bpiotrowski)]

Things like --help or --version are usually (coreutils and a lot of more utilities) printed on stderr, not stdout. I hardly consider this a bug.

[Dima Shulyak (dshulyak)]

Can you provide examples of such application?

virsh --version and virsh --help prints output to stdout,
atleast for me virsh --help would be unusable without an ability to grep by content

And in general what would be the motivation to print out those things to stderr, over stdout?

[Bartłomiej Piotrowski (bpiotrowski)]

Hm, I wrote before about coreutils, but I was apparently testing BSD grep on OS X. You are right that, stdout seems to be de facto standard now and using stderr should be seen as a bug.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/170154

[Vladimir Sharshov (vsharshov)]

Looks like upstream bug:

* http://bugs.python.org/msg211217
* http://bugs.python.org/issue18920

Move it to 7.0

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/201539

[OpenStack Infra (hudson-openstack)]

Change abandoned by Vladimir Sharshov (<email address hidden>) on branch: master
Review: https://review.openstack.org/170154
Reason: New version: https://review.openstack.org/#/c/201539/

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/201539
Committed: https://git.openstack.org/cgit/stackforge/python-fuelclient/commit/?id=67bc0e915a1786fd0b0995e890e088e7c0a7feb0
Submitter: Jenkins
Branch: master

commit 67bc0e915a1786fd0b0995e890e088e7c0a7feb0
Author: Vladimir Sharshov (warpc) <email address hidden>
Date: Tue Jul 14 15:33:15 2015 +0300

    Return --fuel-version output to stdout insted of stderr

    Change-Id: I20895c219be4bb492f47f2e36763bc45c9628df5
    Closes-Bug: #1393849

[Yaroslav Lobankov (ylobankov)]

Verified on

VERSION:
  feature_groups:
    - mirantis
  production: "docker"
  release: "7.0"
  openstack_version: "2015.1.0-7.0"
  api: "1.0"
  build_number: "82"
  build_id: "2015-07-23_10-59-34"
  nailgun_sha: "d1087923e45b0e6d946ce48cb05a71733e1ac113"
  python-fuelclient_sha: "471948c26a8c45c091c5593e54e6727405136eca"
  fuel-agent_sha: "bc25d3b728e823e6154bac0442f6b88747ac48e1"
  astute_sha: "b1f37a988e097175cbbd14338286017b46b584c3"
  fuel-library_sha: "58d94955479aee4b09c2b658d90f57083e668ce4"
  fuel-ostf_sha: "94a483c8aba639be3b96616c1396ef290dcc00cd"
  fuelmain_sha: "68871248453b432ecca0cca5a43ef0aad6079c39"