add cli client for repo

cli/main.go

@@ -0,0 +1,94 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+
+	"github.com/go-git/go-git/v5"
+	"github.com/golang/glog"
+	"github.com/pkg/errors"
+)
+
+const (
+	useCaseFlagName  = "use-case"
+	repoRootFlagName = "repo-root"
+)
+
+var (
+	validUseCases = []string{"setup-vpn"}
+)
+
+func main() {
+	err := run()
+	if err != nil {
+		glog.Fatalf("run failed: %s", err.Error())
+	}
+}
+
+func run() error {
+	useCase := flag.String(useCaseFlagName, "", fmt.Sprintf("Use case to run. Available use cases are: %+v", validUseCases))
+	// repoRootParam := flag.String(repoRootFlagName, "", fmt.Sprintf("Path to the root of the infra repository."))
+
+	// VPN flags
+	vpnClientName := flag.String(vpnClientNameFlagName, "", fmt.Sprintf("Friendly VPN user name."))
+	vpnClientPubKey := flag.String(vpnClientPubKeyFlagName, "", fmt.Sprintf("VPN client public key."))
+
+	flag.Set("logtostderr", "true")
+	flag.Set("stderrthreshold", "WARNING")
+	flag.Set("v", "2")
+	flag.Parse()
+
+	// if *repoRootParam == "" {
+	// 	return fmt.Errorf("'-%s' flag must not be empty", repoRootFlagName)
+	// }
+	if *useCase == "" {
+		return fmt.Errorf("'-%s' flag must not be empty", useCaseFlagName)
+	}
+	// repoRoot, err := filepath.Abs(*repoRootParam)
+	// if err != nil {
+	// 	return errors.Wrapf(err, "failed to create absolute path from %s", repoRoot)
+	// }
+
+	glog.Infof("Use case is: %s", *useCase)
+	// glog.Infof("Repo root is: %s", repoRoot)
+
+	gitFs, err := NewGitFS(repository)
+	if err != nil {
+		return errors.Wrapf(err, "failed to initialize git fs")
+	}
+	worktree, err := gitFs.repo.Worktree()
+	if err != nil {
+		return errors.Wrapf(err, "failed to get worktree")
+	}
+
+	switch *useCase {
+	case vpnUseCaseFlagName:
+		// get last used ip and increment
+		lastIP, err := getAndUpdateIP(gitFs, vpnLastIPConfFileRelative)
+		if err != nil {
+			return errors.Wrapf(err, "failed to get valid last ip from file %s", vpnLastIPConfFileRelative)
+		}
+		// insert new vpn client config
+		err = addVPNClient(gitFs, *vpnClientName, *vpnClientPubKey, vpnClientsConfFileRelative, lastIP)
+		if err != nil {
+			return errors.Wrapf(err, "failed to add vpn client")
+		}
+		// commit changes
+		if _, err = worktree.Commit("Added new VPN client config (still testing) [CI SKIP]", &git.CommitOptions{All: true}); err != nil {
+			return errors.Wrapf(err, "failed to commit")
+		}
+	default:
+		err = errors.New(fmt.Sprintf("unsupported use case: %s", *useCase))
+	}
+	if err != nil {
+		return err
+	}
+	if err = gitFs.Push(); err != nil {
+		return errors.Wrapf(err, "failed to push changes")
+	}
+
+	// err = gitRepo()
+	// glog.Infof(err.Error())
+
+	return nil
+}