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environment.go
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environment.go
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package cmd
import (
"fmt"
"io"
"github.com/spf13/cobra"
"github.com/jenkins-x/jx/pkg/jx/cmd/templates"
"github.com/jenkins-x/jx/pkg/kube"
meta_v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/tools/clientcmd"
"github.com/jenkins-x/jx/pkg/util"
"gopkg.in/AlecAivazis/survey.v1"
"gopkg.in/AlecAivazis/survey.v1/terminal"
"k8s.io/client-go/kubernetes"
)
type EnvironmentOptions struct {
CommonOptions
}
const ()
var (
environment_long = templates.LongDesc(`
Displays or changes the current environment.
For more documentation on Environments see: [https://jenkins-x.io/about/features/#environments](https://jenkins-x.io/about/features/#environments)
`)
environment_example = templates.Examples(`
# view the current environment
jx env -b
# pick which environment to switch to
jx env
# Change the current environment to 'staging'
jx env staging
`)
)
func NewCmdEnvironment(f Factory, in terminal.FileReader, out terminal.FileWriter, errOut io.Writer) *cobra.Command {
options := &EnvironmentOptions{
CommonOptions: CommonOptions{
Factory: f,
In: in,
Out: out,
Err: errOut,
},
}
cmd := &cobra.Command{
Use: "environment",
Aliases: []string{"env"},
Short: "View or change the current environment in the current kubernetes cluster",
Long: environment_long,
Example: environment_example,
Run: func(cmd *cobra.Command, args []string) {
options.Cmd = cmd
options.Args = args
err := options.Run()
CheckErr(err)
},
}
options.addCommonFlags(cmd)
return cmd
}
func (o *EnvironmentOptions) Run() error {
kubeClient, currentNs, err := o.KubeClient()
if err != nil {
return err
}
jxClient, _, err := o.JXClient()
if err != nil {
return err
}
apisClient, err := o.CreateApiExtensionsClient()
if err != nil {
return err
}
kube.RegisterEnvironmentCRD(apisClient)
devNs, currentEnv, err := kube.GetDevNamespace(kubeClient, currentNs)
if err != nil {
return err
}
envNames, err := kube.GetEnvironmentNames(jxClient, devNs)
if err != nil {
return err
}
config, po, err := kube.LoadConfig()
if err != nil {
return err
}
env := ""
args := o.Args
if len(args) > 0 {
env = args[0]
}
if env == "" && !o.BatchMode {
pick, err := kube.PickEnvironment(envNames, currentEnv, o.In, o.Out, o.Err)
if err != nil {
return err
}
env = pick
}
info := util.ColorInfo
if env != "" && env != currentEnv {
envResource, err := jxClient.JenkinsV1().Environments(devNs).Get(env, meta_v1.GetOptions{})
if err != nil {
return util.InvalidArg(env, envNames)
}
ns := envResource.Spec.Namespace
if ns == "" {
return fmt.Errorf("Cannot change to environment %s as it has no namespace!", env)
}
newConfig := *config
ctx := kube.CurrentContext(config)
if ctx == nil {
return fmt.Errorf(noContextDefinedError)
}
if ctx.Namespace == ns {
return nil
}
ctx.Namespace = ns
err = clientcmd.ModifyConfig(po, newConfig, false)
if err != nil {
return fmt.Errorf("Failed to update the kube config %s", err)
}
fmt.Fprintf(o.Out, "Now using environment '%s' in team '%s' on server '%s'.\n", info(env), info(devNs), info(kube.Server(config, ctx)))
} else {
ns := kube.CurrentNamespace(config)
server := kube.CurrentServer(config)
if env == "" {
env = currentEnv
}
if env == "" {
fmt.Fprintf(o.Out, "Using namespace '%s' from context named '%s' on server '%s'.\n", info(ns), info(config.CurrentContext), info(server))
} else {
fmt.Fprintf(o.Out, "Using environment '%s' in team '%s' on server '%s'.\n", info(env), info(devNs), info(server))
}
}
return nil
}
func (o *EnvironmentOptions) PickNamespace(client kubernetes.Interface, defaultNamespace string) (string, error) {
list, err := client.CoreV1().Namespaces().List(meta_v1.ListOptions{})
if err != nil {
return "", fmt.Errorf("Failed to load current namespaces %s", err)
}
names := []string{}
for _, n := range list.Items {
names = append(names, n.Name)
}
var qs = []*survey.Question{
{
Name: "namespace",
Prompt: &survey.Select{
Message: "Change namespace: ",
Options: names,
Default: defaultNamespace,
},
},
}
answers := struct {
Namespace string
}{}
err = survey.Ask(qs, &answers)
if err != nil {
return "", err
}
return answers.Namespace, nil
}