new validate status changes logic

- added exceptions for faulty old versions

These versions only have released .orig files on the final product.
That does not break anything but the .orig files are development files
used during chart bumps.

pkg/validate/validate.go

@@ -1,12 +1,15 @@
 package validate
 
 import (
+	"errors"
 	"fmt"
 	"path/filepath"
 	"strings"
 
 	"github.com/go-git/go-billy/v5"
+	"github.com/go-git/go-git/v5"
 	"github.com/rancher/charts-build-scripts/pkg/filesystem"
+	bashGit "github.com/rancher/charts-build-scripts/pkg/git"
 	"github.com/rancher/charts-build-scripts/pkg/lifecycle"
 	"github.com/rancher/charts-build-scripts/pkg/options"
 	"github.com/rancher/charts-build-scripts/pkg/path"
@@ -212,3 +215,56 @@ func copyAndUnzip(repoFs billy.Filesystem, upstreamPath, localPath string) error
 	}
 	return nil
 }
+
+// StatusExceptions checks if the git repository is clean and if it is not, it checks if the changes are allowed
+func StatusExceptions(status git.Status) error {
+	if !status.IsClean() {
+		if err := validateExceptions(status); err != nil {
+			logrus.Errorf("git is not clean: %s\n", err.Error())
+			logrus.Errorf("status:\n%s\n", status)
+			return errors.New("Repository must be clean to run validation")
+		}
+
+		g, err := bashGit.OpenGitRepo(".")
+		if err != nil {
+			return err
+		}
+		if err := g.FullReset(); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+// validateExceptions checks if the changes are allowed
+func validateExceptions(status git.Status) error {
+	/**
+	* The following exceptions are allowed to be modified, they were wrongly released with .orig files on the final production version.
+	* This does not break anything and it is not allowed to modify already released charts.
+	 */
+	exceptions := map[string][]string{
+		"rancher-istio":        {"105.4.0+up1.23.2"},
+		"prometheus-federator": {"103.0.0+up0.4.0", "103.0.1+up0.4.1", "104.0.0+up0.4.0"},
+	}
+
+	for changedFile, _ := range status {
+		if changedFile == "index.yaml" {
+			continue
+		}
+
+		for exceptionChart, exceptionVersions := range exceptions {
+			if !strings.Contains(changedFile, exceptionChart) {
+				continue
+			}
+
+			for _, exceptionVersion := range exceptionVersions {
+				if !strings.Contains(changedFile, exceptionVersion) {
+					return fmt.Errorf("chart: %s - version: %s is not allowed to be modified", exceptionChart, exceptionVersion)
+				}
+			}
+		}
+	}
+
+	return nil
+}