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--help and help are successful commands so output should not go to error.
QE teams have requested this change, also users doing docker help | less
or docker run --help | less would expect this to work.
Usage statement should only be printed when the user asks for it.
Errors should print error message and then suggest the docker COMMAND --help
command to see usage information.
The current behaviour causes the user to have to search for the error message
and sometimes scrolls right off the screen. For example a error on a
"docker run" command is very difficult to diagnose.
Finally erros should always exit with a non 0 exit code, if the user
makes a CLI error.
Docker-DCO-1.1-Signed-off-by: Dan Walsh <dwalsh@redhat.com> (github: rhatdan)
69 lines
2.3 KiB
Markdown
69 lines
2.3 KiB
Markdown
% DOCKER(1) Docker User Manuals
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% Docker Community
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% JUNE 2014
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# NAME
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docker-pull - Pull an image or a repository from the registry
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# SYNOPSIS
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**docker pull**
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[**-a**|**--all-tags**[=*false*]]
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[**--help**]
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NAME[:TAG]
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# DESCRIPTION
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This command pulls down an image or a repository from the registry. If
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there is more than one image for a repository (e.g., fedora) then all
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images for that repository name are pulled down including any tags.
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It is also possible to specify a non-default registry to pull from.
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# OPTIONS
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**-a**, **--all-tags**=*true*|*false*
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Download all tagged images in the repository. The default is *false*.
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**--help**
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Print usage statement
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# EXAMPLE
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# Pull a repository with multiple images
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# Note that if the image is previously downloaded then the status would be
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# 'Status: Image is up to date for fedora'
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$ sudo docker pull fedora
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Pulling repository fedora
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ad57ef8d78d7: Download complete
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105182bb5e8b: Download complete
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511136ea3c5a: Download complete
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73bd853d2ea5: Download complete
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Status: Downloaded newer image for fedora
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$ sudo docker images
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REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE
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fedora rawhide ad57ef8d78d7 5 days ago 359.3 MB
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fedora 20 105182bb5e8b 5 days ago 372.7 MB
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fedora heisenbug 105182bb5e8b 5 days ago 372.7 MB
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fedora latest 105182bb5e8b 5 days ago 372.7 MB
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# Pull an image, manually specifying path to the registry and tag
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# Note that if the image is previously downloaded then the status would be
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# 'Status: Image is up to date for registry.hub.docker.com/fedora:20'
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$ sudo docker pull registry.hub.docker.com/fedora:20
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Pulling repository fedora
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3f2fed40e4b0: Download complete
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511136ea3c5a: Download complete
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fd241224e9cf: Download complete
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Status: Downloaded newer image for registry.hub.docker.com/fedora:20
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$ sudo docker images
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REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE
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fedora 20 3f2fed40e4b0 4 days ago 372.7 MB
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# HISTORY
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April 2014, Originally compiled by William Henry (whenry at redhat dot com)
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based on docker.com source material and internal work.
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June 2014, updated by Sven Dowideit <SvenDowideit@home.org.au>
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August 2014, updated by Sven Dowideit <SvenDowideit@home.org.au>
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