fetch current email and project/context

cmd/auth.go

@@ -0,0 +1,60 @@
+package cmd
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/coreos/go-oidc"
+	"github.com/spf13/cobra"
+	"golang.org/x/oauth2/google"
+	"k8s.io/client-go/tools/clientcmd"
+)
+
+func getProjectFromKubernetesConfig() string {
+	config, err := clientcmd.NewNonInteractiveDeferredLoadingClientConfig(
+		clientcmd.NewDefaultClientConfigLoadingRules(),
+		&clientcmd.ConfigOverrides{},
+	).RawConfig()
+
+	if err != nil {
+		fmt.Println("Something went wrong")
+		fmt.Println(err.Error())
+	}
+
+	return config.Contexts[config.CurrentContext].Cluster
+}
+
+// authCmd represents the auth command
+var authCmd = &cobra.Command{
+	Use:   "auth",
+	Short: "Shows the current project and email",
+	Long: `Fetches the current project and email using default credentials from Google.
+	See https://cloud.google.com/docs/authentication/application-default-credentials`,
+	Run: func(cmd *cobra.Command, args []string) {
+		ctx := context.Background()
+
+		creds, err := google.FindDefaultCredentials(ctx)
+		if err != nil {
+			fmt.Println("Default credentials were not found. Try logging in to google cloud using the following command:")
+			fmt.Println("gcloud auth application-default login")
+		}
+
+		provider, err := oidc.NewProvider(ctx, "https://accounts.google.com")
+		if err != nil {
+			fmt.Println("Something went wrong")
+			fmt.Println(err.Error())
+		}
+
+		user, err := provider.UserInfo(ctx, creds.TokenSource)
+		if err != nil {
+			fmt.Println("Could not find information regarding the user. Are you sure your application defaults are correct?")
+		}
+
+		fmt.Println("Current email: " + user.Email)
+		fmt.Println("Current project/context: " + getProjectFromKubernetesConfig())
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(authCmd)
+}

cmd/root.go

@@ -0,0 +1,73 @@
+package cmd
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+)
+
+var cfgFile string
+
+// rootCmd represents the base command when called without any subcommands
+var rootCmd = &cobra.Command{
+	Use:   "skipper",
+	Short: "A brief description of your application",
+	Long: `A longer description that spans multiple lines and likely contains
+examples and usage of using your application. For example:
+
+Cobra is a CLI library for Go that empowers applications.
+This application is a tool to generate the needed files
+to quickly create a Cobra application.`,
+	// Uncomment the following line if your bare application
+	// has an action associated with it:
+	// Run: func(cmd *cobra.Command, args []string) { },
+}
+
+// Execute adds all child commands to the root command and sets flags appropriately.
+// This is called by main.main(). It only needs to happen once to the rootCmd.
+func Execute() {
+	err := rootCmd.Execute()
+	if err != nil {
+		os.Exit(1)
+	}
+}
+
+func init() {
+	cobra.OnInitialize(initConfig)
+
+	// Here you will define your flags and configuration settings.
+	// Cobra supports persistent flags, which, if defined here,
+	// will be global for your application.
+
+	rootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file (default is $HOME/.skipper.yaml)")
+
+	// Cobra also supports local flags, which will only run
+	// when this action is called directly.
+	rootCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
+}
+
+// initConfig reads in config file and ENV variables if set.
+func initConfig() {
+	if cfgFile != "" {
+		// Use config file from the flag.
+		viper.SetConfigFile(cfgFile)
+	} else {
+		// Find home directory.
+		home, err := os.UserHomeDir()
+		cobra.CheckErr(err)
+
+		// Search config in home directory with name ".skipper" (without extension).
+		viper.AddConfigPath(home)
+		viper.SetConfigType("yaml")
+		viper.SetConfigName(".skipper")
+	}
+
+	viper.AutomaticEnv() // read in environment variables that match
+
+	// If a config file is found, read it in.
+	if err := viper.ReadInConfig(); err == nil {
+		fmt.Fprintln(os.Stderr, "Using config file:", viper.ConfigFileUsed())
+	}
+}

go.mod

@@ -0,0 +1,61 @@
+module github.com/kartverket/skipper
+
+go 1.19
+
+require (
+	github.com/coreos/go-oidc v2.2.1+incompatible
+	github.com/spf13/cobra v1.6.1
+	github.com/spf13/viper v1.14.0
+)
+
+require (
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/go-logr/logr v1.2.3 // indirect
+	github.com/gogo/protobuf v1.3.2 // indirect
+	github.com/google/gofuzz v1.1.0 // indirect
+	github.com/imdario/mergo v0.3.6 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/pquerna/cachecontrol v0.1.0 // indirect
+	golang.org/x/crypto v0.0.0-20220525230936-793ad666bf5e // indirect
+	golang.org/x/term v0.3.0 // indirect
+	golang.org/x/time v0.0.0-20220609170525-579cf78fd858 // indirect
+	gopkg.in/inf.v0 v0.9.1 // indirect
+	gopkg.in/square/go-jose.v2 v2.6.0 // indirect
+	k8s.io/apimachinery v0.26.0 // indirect
+	k8s.io/klog/v2 v2.80.1 // indirect
+	k8s.io/utils v0.0.0-20221107191617-1a15be271d1d // indirect
+	sigs.k8s.io/json v0.0.0-20220713155537-f223a00ba0e2 // indirect
+	sigs.k8s.io/structured-merge-diff/v4 v4.2.3 // indirect
+	sigs.k8s.io/yaml v1.3.0 // indirect
+)
+
+require (
+	cloud.google.com/go/compute v1.13.0 // indirect
+	cloud.google.com/go/compute/metadata v0.2.2 // indirect
+	github.com/fsnotify/fsnotify v1.6.0 // indirect
+	github.com/golang/protobuf v1.5.2 // indirect
+	github.com/hashicorp/hcl v1.0.0 // indirect
+	github.com/inconshreveable/mousetrap v1.1.0 // indirect
+	github.com/magiconair/properties v1.8.7 // indirect
+	github.com/mitchellh/mapstructure v1.5.0 // indirect
+	github.com/pelletier/go-toml v1.9.5 // indirect
+	github.com/pelletier/go-toml/v2 v2.0.6 // indirect
+	github.com/spf13/afero v1.9.3 // indirect
+	github.com/spf13/cast v1.5.0 // indirect
+	github.com/spf13/jwalterweatherman v1.1.0 // indirect
+	github.com/spf13/pflag v1.0.5 // indirect
+	github.com/subosito/gotenv v1.4.1 // indirect
+	golang.org/x/net v0.3.1-0.20221206200815-1e63c2f08a10 // indirect
+	golang.org/x/oauth2 v0.0.0-20221014153046-6fdb5e3db783
+	golang.org/x/sys v0.3.0 // indirect
+	golang.org/x/text v0.5.0 // indirect
+	google.golang.org/appengine v1.6.7 // indirect
+	google.golang.org/protobuf v1.28.1 // indirect
+	gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c // indirect
+	gopkg.in/ini.v1 v1.67.0 // indirect
+	gopkg.in/yaml.v2 v2.4.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+	k8s.io/client-go v0.26.0
+)