Merge pull request #219 from jfortin-sap/add-terraform-subcommand

Add terraform subcommand

pkg/cmd/root.go

@@ -146,6 +146,7 @@ func init() {
 	RootCmd.AddCommand(NewSSHCmd(targetReader, ioStreams))
 	RootCmd.AddCommand(NewKubectlCmd(), NewKaCmd(), NewKsCmd(), NewKgCmd(), NewKnCmd())
 	RootCmd.AddCommand(NewKubectxCmd())
+	RootCmd.AddCommand(NewTerraformCmd(targetReader))
 	RootCmd.AddCommand(NewAliyunCmd(targetReader), NewAwsCmd(targetReader), NewAzCmd(targetReader), NewGcloudCmd(targetReader), NewOpenstackCmd(targetReader))
 	RootCmd.AddCommand(NewInfoCmd(targetReader, ioStreams))
 	RootCmd.AddCommand(NewVersionCmd(), NewUpdateCheckCmd())

pkg/cmd/terraform.go

@@ -0,0 +1,84 @@
+// Copyright (c) 2018 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package cmd
+
+import (
+	"errors"
+	"fmt"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
+
+	"github.com/spf13/cobra"
+)
+
+// NewTerraformCmd returns a new terraform command.
+func NewTerraformCmd(targetReader TargetReader) *cobra.Command {
+	return &cobra.Command{
+		Use:          "terraform <args>",
+		SilenceUsage: true,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			target := targetReader.ReadTarget(pathTarget)
+			if !CheckShootIsTargeted(target) {
+				return errors.New("no shoot targeted")
+			}
+
+			arguments := "terraform " + strings.Join(args[:], " ")
+			terraform(arguments)
+
+			return nil
+		},
+	}
+}
+
+// terraform executes a terraform command on targeted cluster
+func terraform(args string) {
+	_, err := exec.LookPath("terraform")
+	if err != nil {
+		fmt.Println("Terraform is not installed on your system")
+		os.Exit(2)
+	}
+	var target Target
+	ReadTarget(pathTarget, &target)
+	gardenName := target.Stack()[0].Name
+	pathTerraform := ""
+
+	if target.Target[1].Kind == "project" {
+		pathTerraform = filepath.Join(pathGardenHome, "cache", gardenName, "projects", target.Target[1].Name, target.Target[2].Name, "terraform")
+	} else if target.Target[1].Kind == "seed" {
+		pathTerraform = filepath.Join(pathGardenHome, "cache", gardenName, "seeds", target.Target[1].Name, target.Target[2].Name, "terraform")
+	}
+
+	if (strings.HasSuffix(args, "init")) {
+		pathTerraform = downloadTerraformFiles("infra")
+		fmt.Println("Downloaded terraform config to " + pathTerraform)
+	}
+
+	_, err = os.Stat(pathTerraform)
+	if os.IsNotExist(err) {
+		fmt.Println("Please run terraform init first to fetch terraform config")
+		os.Exit(2)
+	}
+
+	err = os.Chdir(pathTerraform)
+	if err != nil {
+		fmt.Println("Could not move into the directory " + pathTerraform)
+		os.Exit(2)
+	}
+
+	err = ExecCmd(nil, args, false)
+	checkError(err)
+}