mirror of https://github.com/knative/client.git
93 lines
3.1 KiB
Go
93 lines
3.1 KiB
Go
// Copyright © 2021 The Knative Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package container
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import (
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"errors"
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"os"
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"github.com/spf13/cobra"
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corev1 "k8s.io/api/core/v1"
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"knative.dev/client/pkg/commands"
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knflags "knative.dev/client/pkg/flags"
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sigyaml "sigs.k8s.io/yaml"
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)
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// NewContainerAddCommand to create event channels
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func NewContainerAddCommand(p *commands.KnParams) *cobra.Command {
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var podSpecFlags knflags.PodSpecFlags
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cmd := &cobra.Command{
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Use: "add NAME",
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Short: "Add a container",
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Example: `
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The command is Beta and may change in the future releases.
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The 'container add' represents utility command that prints YAML container spec to standard output. It's useful for
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multi-container use cases to create definition with help of standard 'kn' option flags. It accepts all container related
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flag available for 'service create'. The command can be chained through Unix pipes to create multiple containers at once.
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# Add a container 'sidecar' from image 'docker.io/example/sidecar' and print it to standard output (Beta)
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kn container add sidecar --image docker.io/example/sidecar
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# Add command can be chained by standard Unix pipe symbol '|' and passed to 'service add|update|apply' commands (Beta)
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kn container add sidecar --image docker.io/example/sidecar:first | \
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kn container add second --image docker.io/example/sidecar:second | \
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kn service create myksvc --image docker.io/example/my-app:latest --containers -`,
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RunE: func(cmd *cobra.Command, args []string) (err error) {
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if len(args) != 1 {
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return errors.New("'container add' requires the container name given as single argument")
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}
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name := args[0]
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if podSpecFlags.Image == "" {
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return errors.New("'container add' requires the image name to run provided with the --image option")
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}
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// Detect pipe input from previous container command
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if IsPipeInput(os.Stdin) {
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podSpecFlags.ExtraContainers = "-"
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}
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podSpec := &corev1.PodSpec{}
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if err = podSpecFlags.ResolvePodSpec(podSpec, cmd.Flags(), os.Args); err != nil {
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return err
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}
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// Add container's name to current one
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podSpec.Containers[0].Name = name
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b, err := sigyaml.Marshal(podSpec)
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if err != nil {
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return err
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}
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_, err = cmd.OutOrStdout().Write(b)
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return err
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},
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}
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podSpecFlags.AddFlags(cmd.Flags())
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podSpecFlags.AddUpdateFlags(cmd.Flags())
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// Volume is not part of ContainerSpec
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cmd.Flag("volume").Hidden = true
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return cmd
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}
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// IsPipeInput determines the input is created using unix '|' pipe
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func IsPipeInput(f *os.File) bool {
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fi, err := f.Stat()
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if err != nil {
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return false
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}
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return fi.Mode()&os.ModeCharDevice == 0
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}
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