mirror of https://github.com/knative/client.git
127 lines
3.5 KiB
Go
127 lines
3.5 KiB
Go
// Copyright © 2018 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 core
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import (
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"flag"
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"fmt"
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"os"
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"path"
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"path/filepath"
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"github.com/knative/client/pkg/kn/commands"
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"github.com/knative/client/pkg/kn/commands/revision"
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"github.com/knative/client/pkg/kn/commands/service"
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homedir "github.com/mitchellh/go-homedir"
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"github.com/spf13/cobra"
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"github.com/spf13/viper"
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_ "k8s.io/client-go/plugin/pkg/client/auth/gcp"
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_ "k8s.io/client-go/plugin/pkg/client/auth/oidc"
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)
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// rootCmd represents the base command when called without any subcommands
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func NewKnCommand(params ...commands.KnParams) *cobra.Command {
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var p *commands.KnParams
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if len(params) == 0 {
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p = &commands.KnParams{}
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} else if len(params) == 1 {
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p = ¶ms[0]
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} else {
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panic("Too many params objects to NewKnCommand")
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}
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p.Initialize()
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rootCmd := &cobra.Command{
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Use: "kn",
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Short: "Knative client",
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Long: `Manage your Knative building blocks:
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Serving: Manage your services and release new software to them.
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Build: Create builds and keep track of their results.
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Eventing: Manage event subscriptions and channels. Connect up event sources.`,
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// Disable docs header
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DisableAutoGenTag: true,
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// Affects children as well
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SilenceUsage: true,
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// Prevents Cobra from dealing with errors as we deal with them in main.go
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SilenceErrors: true,
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}
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if p.Output != nil {
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rootCmd.SetOutput(p.Output)
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}
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rootCmd.PersistentFlags().StringVar(&commands.CfgFile, "config", "", "config file (default is $HOME/.kn/config.yaml)")
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rootCmd.PersistentFlags().StringVar(&commands.KubeCfgFile, "kubeconfig", "", "kubectl config file (default is $HOME/.kube/config)")
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rootCmd.AddCommand(service.NewServiceCommand(p))
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rootCmd.AddCommand(revision.NewRevisionCommand(p))
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rootCmd.AddCommand(commands.NewCompletionCommand(p))
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rootCmd.AddCommand(commands.NewVersionCommand(p))
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// For glog parse error.
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flag.CommandLine.Parse([]string{})
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return rootCmd
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}
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func InitializeConfig() {
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cobra.OnInitialize(initConfig)
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cobra.OnInitialize(initKubeConfig)
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}
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func initKubeConfig() {
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if commands.KubeCfgFile != "" {
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return
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}
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if kubeEnvConf, ok := os.LookupEnv("KUBECONFIG"); ok {
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commands.KubeCfgFile = kubeEnvConf
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} else {
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home, err := homedir.Dir()
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if err != nil {
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fmt.Fprintln(os.Stderr, err)
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os.Exit(1)
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}
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commands.KubeCfgFile = filepath.Join(home, ".kube", "config")
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}
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}
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// initConfig reads in config file and ENV variables if set.
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func initConfig() {
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if commands.CfgFile != "" {
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// Use config file from the flag.
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viper.SetConfigFile(commands.CfgFile)
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} else {
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// Find home directory.
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home, err := homedir.Dir()
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if err != nil {
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fmt.Fprintln(os.Stderr, err)
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os.Exit(1)
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}
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// Search config in home directory with name ".kn" (without extension).
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viper.AddConfigPath(path.Join(home, ".kn"))
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viper.SetConfigName("config")
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}
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viper.AutomaticEnv() // read in environment variables that match
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// If a config file is found, read it in.
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if err := viper.ReadInConfig(); err == nil {
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fmt.Fprintln(os.Stderr, "Using config file:", viper.ConfigFileUsed())
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}
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}
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