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context: add shell-completion for context-names

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For now, these are not exported and included in the cli/commands/contexts
package; a copy of this also lives in cmd/docker, but we need to find a
good place for these completions, as some of them bring in additional
dependencies.

Commands that accept multiple arguments provide completion, but removing
duplicates:

    docker context inspect<TAB>
    default  desktop-linux  (current)  production  tcd

    docker context inspec default<TAB>
    desktop-linux  (current)  production  tcd

    docker context inspect default tcd<TAB>
    desktop-linux  (current)  production

For "context export", we provide completion for the first argument, after
which file-completion is provided:

    # provides context names completion for the first argument
    docker context export production<TAB>
    default  desktop-linux  (current)  production  tcd

    # then provides completion for filenames
    docker context export desktop-linux<TAB>
    build/           man/                TESTING.md
    cli/             docker.Makefile     go.mod
    ...

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This commit is contained in:
Sebastiaan van Stijn
2025-04-16 17:57:53 +02:00
parent b8857225a0
commit 6fd72c6333
8 changed files with 147 additions and 13 deletions
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9
cli/command/context/inspect.go
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@ -19,7 +19,7 @@ type inspectOptions struct {
}
// newInspectCommand creates a new cobra.Command for `docker context inspect`
func newInspectCommand(dockerCli command.Cli) *cobra.Command {
func newInspectCommand(dockerCLI command.Cli) *cobra.Command {
var opts inspectOptions
cmd := &cobra.Command{
@ -28,13 +28,14 @@ func newInspectCommand(dockerCli command.Cli) *cobra.Command {
RunE: func(cmd *cobra.Command, args []string) error {
opts.refs = args
if len(opts.refs) == 0 {
if dockerCli.CurrentContext() == "" {
if dockerCLI.CurrentContext() == "" {
return errors.New("no context specified")
}
opts.refs = []string{dockerCli.CurrentContext()}
opts.refs = []string{dockerCLI.CurrentContext()}
}
return runInspect(dockerCli, opts)
return runInspect(dockerCLI, opts)
},
ValidArgsFunction: completeContextNames(dockerCLI, -1, false),
}
flags := cmd.Flags()