[#6] Add config init subcommand

This change introduces logic for the config init subcommand, which
generates an airshipctl configuration file with default values. The
default values are extracted from constants and change when the source
code is updated.

Closes #6

Change-Id: I452e26bc5a924f0cdcd3153a9b124d23e2e5b1f0
Signed-off-by: Drew Walters <andrew.walters@att.com>

.gitignore

@@ -8,6 +8,7 @@ bin/
 
 # Test binary, build wiith `go test -c`
 *.test
+*.example
 
 # Output of the go coverage tool
 *.out

cmd/config/init.go

@@ -1,4 +1,4 @@
-/*l
+/*
 Copyright 2014 The Kubernetes Authors.
 
 Licensed under the Apache License, Version 2.0 (the "License");
@@ -20,7 +20,6 @@ import (
 	"github.com/spf13/cobra"
 
 	"opendev.org/airship/airshipctl/pkg/environment"
-	"opendev.org/airship/airshipctl/pkg/errors"
 )
 
 var (
@@ -33,7 +32,14 @@ func NewCmdConfigInit(rootSettings *environment.AirshipCTLSettings) *cobra.Comma
 		Use:   "init",
 		Short: configInitLong,
 		RunE: func(cmd *cobra.Command, args []string) error {
-			return errors.ErrNotImplemented{}
+			c := rootSettings.Config()
+
+			err := c.PersistConfig()
+			if err != nil {
+				return err
+			}
+
+			return nil
 		},
 	}
 

cmd/config/init_test.go

@@ -19,17 +19,15 @@ package config
 import (
 	"testing"
 
-	"opendev.org/airship/airshipctl/pkg/errors"
 	"opendev.org/airship/airshipctl/testutil"
 )
 
 func TestConfigInit(t *testing.T) {
 	cmdTests := []*testutil.CmdTest{
 		{
-			Name:    "config-init",
+			Name:    "config-init-help",
-			CmdLine: "",
+			CmdLine: "-h",
 			Cmd:     NewCmdConfigInit(nil),
-			Error:   errors.ErrNotImplemented{},
 		},
 	}
 

cmd/config/testdata/TestConfigInitGoldenOutput/config-init-help.golden

@@ -1,7 +1,7 @@
-Error: Not implemented
+Generate initial configuration files for airshipctl
+
 Usage:
   init [flags]
 
 Flags:
   -h, --help   help for init
-

pkg/config/config.go

@@ -82,7 +82,25 @@ func (c *Config) loadKubeConfig(kubeConfigPath string) error {
 	// If I can read from the file, load from it
 	var err error
 	if _, err = os.Stat(kubeConfigPath); os.IsNotExist(err) {
-		c.kubeConfig = clientcmdapi.NewConfig()
+		// Default kubeconfig matching Airship target cluster
+		c.kubeConfig = &clientcmdapi.Config{
+			Clusters: map[string]*clientcmdapi.Cluster{
+				AirshipDefaultContext: {
+					Server: "https://172.17.0.1:6443",
+				},
+			},
+			AuthInfos: map[string]*clientcmdapi.AuthInfo{
+				"admin": {
+					Username: "airship-admin",
+				},
+			},
+			Contexts: map[string]*clientcmdapi.Context{
+				AirshipDefaultContext: {
+					Cluster:  AirshipDefaultContext,
+					AuthInfo: "admin",
+				},
+			},
+		}
 		return nil
 	} else if err != nil {
 		return err

pkg/config/constants.go

@@ -27,6 +27,16 @@ const (
 
 	AirshipConfigEnv     = "AIRSHIPCONFIG"
 	AirshipKubeConfigEnv = "AIRSHIP_KUBECONFIG"
+
+	AirshipDefaultContext              = "default"
+	AirshipDefaultManifest             = "default"
+	AirshipDefaultManifestRepo         = "treasuremap"
+	AirshipDefaultManifestRepoLocation = "https://opendev.org/airship/" + AirshipDefaultManifestRepo
+
+	// Modules
+	AirshipDefaultBootstrapImage = "quay.io/airshipit/isogen:latest"
+	AirshipDefaultIsoURL         = "http://localhost:8099/debian-custom.iso"
+	AirshipDefaultRemoteType     = "redfish"
 )
 
 // Constants defining CLI flags

pkg/config/utils.go

@@ -22,10 +22,45 @@ func NewConfig() *Config {
 		Kind:       AirshipConfigKind,
 		APIVersion: AirshipConfigApiVersion,
 		Clusters:   make(map[string]*ClusterPurpose),
-		Contexts:      make(map[string]*Context),
 		AuthInfos:  make(map[string]*AuthInfo),
-		Manifests:     make(map[string]*Manifest),
+		Contexts: map[string]*Context{
-		ModulesConfig: NewModules(),
+			AirshipDefaultContext: {
+				Manifest: AirshipDefaultManifest,
+			},
+		},
+		Manifests: map[string]*Manifest{
+			AirshipDefaultManifest: {
+				Repository: &Repository{
+					URLString: AirshipDefaultManifestRepoLocation,
+					CheckoutOptions: &RepoCheckout{
+						CommitHash: "master",
+						Branch:     "master",
+						RemoteRef:  "master",
+					},
+				},
+				TargetPath: "/tmp/" + AirshipDefaultManifest,
+			},
+		},
+		ModulesConfig: &Modules{
+			BootstrapInfo: map[string]*Bootstrap{
+				AirshipDefaultContext: {
+					Container: &Container{
+						Volume:           "/srv/iso:/config",
+						Image:            AirshipDefaultBootstrapImage,
+						ContainerRuntime: "docker",
+					},
+					Builder: &Builder{
+						UserDataFileName:       "user-data",
+						NetworkConfigFileName:  "network-config",
+						OutputMetadataFileName: "output-metadata.yaml",
+					},
+					RemoteDirect: &RemoteDirect{
+						RemoteType: AirshipDefaultRemoteType,
+						IsoURL:     AirshipDefaultIsoURL,
+					},
+				},
+			},
+		},
 	}
 }