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fix docker info --format=json not outputting json format 

The --format=json option was added for all inspect commands, but was not implemented
for "docker info". This patch implements the missing option.

Before this patch:

    docker info --format=json
    json

With this patch applied:

    docker info --format=json
    {"ID":"80c2f18a-2c88-4e4a-ba69-dca0eea59835","Containers":7,"ContainersRunning":"..."}

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This commit is contained in:
Sebastiaan van Stijn 2023-04-09 13:11:19 +02:00
parent 1aaa179d9d
commit 46234b82e2
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GPG Key ID: 76698F39D527CE8C
4 changed files with 18 additions and 10 deletions
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11
cli/command/system/info.go
View File

@ -12,7 +12,9 @@ import (
pluginmanager "github.com/docker/cli/cli-plugins/manager"
"github.com/docker/cli/cli/command"
"github.com/docker/cli/cli/command/completion"
"github.com/docker/cli/cli/command/formatter"
"github.com/docker/cli/cli/debug"
flagsHelper "github.com/docker/cli/cli/flags"
"github.com/docker/cli/templates"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/swarm"
@ -62,10 +64,7 @@ func NewInfoCommand(dockerCli command.Cli) *cobra.Command {
ValidArgsFunction: completion.NoComplete,
}
flags := cmd.Flags()
flags.StringVarP(&opts.format, "format", "f", "", "Format the output using the given Go template")
cmd.Flags().StringVarP(&opts.format, "format", "f", "", flagsHelper.InspectFormatHelp)
return cmd
}
@ -507,6 +506,10 @@ func printServerWarningsLegacy(dockerCli command.Cli, info types.Info) {
}
func formatInfo(dockerCli command.Cli, info info, format string) error {
if format == formatter.JSONFormatKey {
format = formatter.JSONFormat
}
// Ensure slice/array fields render as `[]` not `null`
if info.ClientInfo != nil && info.ClientInfo.Plugins == nil {
info.ClientInfo.Plugins = make([]pluginmanager.Plugin, 0)

5
cli/command/system/info_test.go
View File

@ -396,6 +396,11 @@ func TestPrettyPrintInfo(t *testing.T) {
assert.NilError(t, formatInfo(cli, tc.dockerInfo, "{{json .}}"))
golden.Assert(t, cli.OutBuffer().String(), tc.jsonGolden+".json.golden")
assert.Check(t, is.Equal("", cli.ErrBuffer().String()))
cli = test.NewFakeCli(&fakeClient{})
assert.NilError(t, formatInfo(cli, tc.dockerInfo, "json"))
golden.Assert(t, cli.OutBuffer().String(), tc.jsonGolden+".json.golden")
assert.Check(t, is.Equal("", cli.ErrBuffer().String()))
}
})
}

4
docs/reference/commandline/info.md
View File

@ -10,8 +10,8 @@ Display system-wide information
### Options
| Name | Type | Default | Description |
|:---------------------------------------|:---------|:--------|:----------------------------------------------|
| [`-f`](#format), [`--format`](#format) | `string` | | Format the output using the given Go template |
|:---------------------------------------|:---------|:--------|:-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| [`-f`](#format), [`--format`](#format) | `string` | | Format output using a custom template:<br>'json': Print in JSON format<br>'TEMPLATE': Print output using the given Go template.<br>Refer to https://docs.docker.com/go/formatting/ for more information about formatting output with templates |
<!---MARKER_GEN_END-->

4
docs/reference/commandline/system_info.md
View File

@ -10,8 +10,8 @@ Display system-wide information
### Options
| Name | Type | Default | Description |
|:-----------------|:---------|:--------|:----------------------------------------------|
| `-f`, `--format` | `string` | | Format the output using the given Go template |
|:-----------------|:---------|:--------|:-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| `-f`, `--format` | `string` | | Format output using a custom template:<br>'json': Print in JSON format<br>'TEMPLATE': Print output using the given Go template.<br>Refer to https://docs.docker.com/go/formatting/ for more information about formatting output with templates |
<!---MARKER_GEN_END-->