Merge pull request #502 from MUzairS15/MUzairS15/helm/dryrun

[Helm] Update DryRun to include Kubernetes version.

generators/github/git_repo.go

@@ -3,14 +3,15 @@ package github
 import (
 	"bufio"
 	"fmt"
-	"github.com/layer5io/meshkit/generators/models"
-	"github.com/layer5io/meshkit/utils"
-	"github.com/layer5io/meshkit/utils/helm"
-	"github.com/layer5io/meshkit/utils/walker"
 	"net/url"
 	"os"
 	"path/filepath"
 	"strings"
+
+	"github.com/layer5io/meshkit/generators/models"
+	"github.com/layer5io/meshkit/utils"
+	"github.com/layer5io/meshkit/utils/helm"
+	"github.com/layer5io/meshkit/utils/walker"
 )
 
 type GitRepo struct {

utils/helm/helm.go

@@ -6,14 +6,25 @@ import (
 	"io/fs"
 	"os"
 	"path/filepath"
+	"regexp"
 	"strings"
 
 	"github.com/layer5io/meshkit/utils"
 	"helm.sh/helm/v3/pkg/action"
 	"helm.sh/helm/v3/pkg/chart"
 	"helm.sh/helm/v3/pkg/chart/loader"
+	"helm.sh/helm/v3/pkg/chartutil"
 )
 
+func extractSemVer(versionConstraint string) string {
+	reg := regexp.MustCompile(`v([0-9]+)\.([0-9]+)\.([0-9]+)(?:-([0-9A-Za-z-]+(?:\.[0-9A-Za-z-]+)*))?(?:\+[0-9A-Za-z-]+)?$`)
+	match := reg.Find([]byte(versionConstraint))
+	if match != nil {
+		return string(match)
+	}
+	return ""
+}
+
 // DryRun a given helm chart to convert into k8s manifest
 func DryRunHelmChart(chart *chart.Chart) ([]byte, error) {
 	actconfig := new(action.Configuration)
@@ -23,6 +34,14 @@ func DryRunHelmChart(chart *chart.Chart) ([]byte, error) {
 	act.DryRun = true
 	act.IncludeCRDs = true
 	act.ClientOnly = true
+	if chart.Metadata.KubeVersion != "" {
+		version := extractSemVer(chart.Metadata.KubeVersion)
+		if version != "" {
+			act.KubeVersion = &chartutil.KubeVersion{
+				Version: version,
+			}
+		}
+	}
 	rel, err := act.Run(chart, nil)
 	if err != nil {
 		return nil, ErrDryRunHelmChart(err, chart.Name())