Add a warning if spec is applied on a dirty worktree (#1966)

* Add a warning if spec is applied on a dirty worktree

* Update go dependencies after rebase

* Use the console package for showing the warning

* Fix merge conflicts

* Handle errors and use better messages

Co-authored-by: Sanket Sudake <sanketsudake@gmail.com>

pkg/fission-cli/cmd/spec/apply.go

@@ -27,6 +27,7 @@ import (
 	"time"
 
 	"github.com/fsnotify/fsnotify"
+	"github.com/go-git/go-git/v5"
 	"github.com/mholt/archiver"
 	"github.com/pkg/errors"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
@@ -123,6 +124,11 @@ func (opts *ApplySubCommand) run(input cli.Input) error {
 			}
 		}
 
+		err = warnIfDirtyWorkTree(filepath.Clean(specDir + "/.."))
+		if err != nil {
+			console.Warn(err.Error())
+		}
+
 		// make changes to the cluster based on the specs
 		pkgMetas, as, err := applyResources(opts.Client(), specDir, fr, deleteResources)
 		if err != nil {
@@ -185,6 +191,30 @@ func (opts *ApplySubCommand) run(input cli.Input) error {
 	return nil
 }
 
+func warnIfDirtyWorkTree(path string) error {
+	repo, err := git.PlainOpen(path)
+	if err != nil {
+		console.Info("Spec doesn't belong to Git Tree.")
+		return nil
+	}
+
+	workTree, err := repo.Worktree()
+	if err != nil {
+		return err
+	}
+
+	status, err := workTree.Status()
+	if err != nil {
+		return err
+	}
+
+	if !status.IsClean() {
+		console.Warn("Worktree is not clean, please ensure you have committed the changes to git.")
+	}
+
+	return nil
+}
+
 func ignoreFile(path string) bool {
 	return (strings.Contains(path, "/.#") || // editor autosave files
 		strings.HasSuffix(path, "~")) // editor backups, usually