The `docker images` top-level subcommand predates the `docker <object> <verb>`
convention (e.g. `docker image ls`), but accepts a positional argument to
search/filter images by name (globbing). It's common for users to accidentally
mistake these commands, and to use (e.g.) `docker images ls`, expecting
to see all images, but ending up with an empty list because no image named
"ls" was found.
Disallowing these search-terms would be a breaking change, but we can print
and informational message to help the users correct their mistake.
Before this patch:
docker images ls
REPOSITORY TAG IMAGE ID CREATED SIZE
With this patch applied:
docker images ls
REPOSITORY TAG IMAGE ID CREATED SIZE
No images found matching "ls": did you mean "docker image ls"?
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Cobra allows for aliases to be defined for a command, but only allows these
to be defined at the same level (for example, `docker image ls` as alias for
`docker image list`). Our CLI has some commands that are available both as a
top-level shorthand as well as `docker <object> <verb>` subcommands. For example,
`docker ps` is a shorthand for `docker container ps` / `docker container ls`.
This patch introduces a custom "aliases" annotation that can be used to print
all available aliases for a command. While this requires these aliases to be
defined manually, in practice the list of aliases rarely changes, so maintenance
should be minimal.
As a convention, we could consider the first command in this list to be the
canonical command, so that we can use this information to add redirects in
our documentation in future.
Before this patch:
docker images --help
Usage: docker images [OPTIONS] [REPOSITORY[:TAG]]
List images
Options:
-a, --all Show all images (default hides intermediate images)
...
With this patch:
docker images --help
Usage: docker images [OPTIONS] [REPOSITORY[:TAG]]
List images
Aliases:
docker image ls, docker image list, docker images
Options:
-a, --all Show all images (default hides intermediate images)
...
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This adds a new annotation to commands that are known to be frequently
used, and allows setting a custom weight/order for these commands to
influence in what order they appear in the --help output.
I'm not entirely happy with the implementation (we could at least use
some helpers for this, and/or make it more generic to group commands
in output), but it could be a start.
For now, limiting this to only be used for the top-level --help, but
we can expand this to subcommands as well if we think it makes sense
to highlight "common" / "commonly used" commands.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
including all the directives and a link to the documentation.
Signed-off-by: Silvin Lubecki <silvin.lubecki@docker.com>
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Since go 1.7, "context" is a standard package. Since go 1.9,
x/net/context merely provides some types aliased to those in
the standard context package.
The changes were performed by the following script:
for f in $(git ls-files \*.go | grep -v ^vendor/); do
sed -i 's|golang.org/x/net/context|context|' $f
goimports -w $f
for i in 1 2; do
awk '/^$/ {e=1; next;}
/\t"context"$/ {e=0;}
{if (e) {print ""; e=0}; print;}' < $f > $f.new && \
mv $f.new $f
goimports -w $f
done
done
[v2: do awk/goimports fixup twice]
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
Sebastiaan van Stijn
Paweł Gronowski
Brian Goff
Silvin Lubecki
Dominik Braun
Kir Kolyshkin
Vincent Demeester
Ignacio Capurro
Daniel Nephin
Daniel Nephin