feat: add globstar support to --show-only

Signed-off-by: Mario Valderrama <valderra.ma@outlook.com>

pkg/cmd/template.go

@@ -30,10 +30,11 @@ import (
 	"sort"
 	"strings"
 
-	release "helm.sh/helm/v4/pkg/release/v1"
-
+	"github.com/gobwas/glob"
 	"github.com/spf13/cobra"
 
+	release "helm.sh/helm/v4/pkg/release/v1"
+
 	"helm.sh/helm/v4/pkg/action"
 	chartutil "helm.sh/helm/v4/pkg/chart/v2/util"
 	"helm.sh/helm/v4/pkg/cli/values"
@@ -151,9 +152,16 @@ func newTemplateCmd(cfg *action.Configuration, out io.Writer) *cobra.Command {
 					manifestNameRegex := regexp.MustCompile("# Source: [^/]+/(.+)")
 					var manifestsToRender []string
 					for _, f := range showFiles {
-						missing := true
 						// Use linux-style filepath separators to unify user's input path
 						f = filepath.ToSlash(f)
+						// manifest.Path is connected using linux-style filepath separators on Windows as
+						// well as macOS/linux
+						g, err := glob.Compile(f, '/')
+						if err != nil {
+							return fmt.Errorf("invalid pattern %q", f)
+						}
+
+						missing := true
 						for _, manifestKey := range manifestsKeys {
 							manifest := splitManifests[manifestKey]
 							submatch := manifestNameRegex.FindStringSubmatch(manifest)
@@ -161,21 +169,13 @@ func newTemplateCmd(cfg *action.Configuration, out io.Writer) *cobra.Command {
 								continue
 							}
 							manifestName := submatch[1]
-							// manifest.Name is rendered using linux-style filepath separators on Windows as
-							// well as macOS/linux.
-							manifestPathSplit := strings.Split(manifestName, "/")
-							// manifest.Path is connected using linux-style filepath separators on Windows as
-							// well as macOS/linux
-							manifestPath := strings.Join(manifestPathSplit, "/")
-
 							// if the filepath provided matches a manifest path in the
 							// chart, render that manifest
-							if matched, _ := filepath.Match(f, manifestPath); !matched {
-								continue
-							}
+							if g.Match(manifestName) {
 								manifestsToRender = append(manifestsToRender, manifest)
 								missing = false
 							}
+						}
 						if missing {
 							return fmt.Errorf("could not find template %s in chart", f)
 						}

pkg/cmd/template_test.go

@@ -113,6 +113,12 @@ func TestTemplateCmd(t *testing.T) {
 			// Repeat to ensure manifest ordering regressions are caught
 			repeat: 10,
 		},
+		{
+			name:   "template with show-only globstar",
+			cmd:    fmt.Sprintf("template '%s' --show-only **/service.yaml ", chartPath),
+			golden: "output/template-show-only-globstar.txt",
+			repeat: 10,
+		},
 		{
 			name:   "sorted output of manifests (order of filenames, then order of objects within each YAML file)",
 			cmd:    fmt.Sprintf("template '%s'", "testdata/testcharts/object-order"),

pkg/cmd/testdata/output/template-show-only-globstar.txt

@@ -0,0 +1,55 @@
+---
+# Source: subchart/charts/subcharta/templates/service.yaml
+apiVersion: v1
+kind: Service
+metadata:
+  name: subcharta
+  labels:
+    helm.sh/chart: "subcharta-0.1.0"
+spec:
+  type: ClusterIP
+  ports:
+  - port: 80
+    targetPort: 80
+    protocol: TCP
+    name: apache
+  selector:
+    app.kubernetes.io/name: subcharta
+---
+# Source: subchart/charts/subchartb/templates/service.yaml
+apiVersion: v1
+kind: Service
+metadata:
+  name: subchartb
+  labels:
+    helm.sh/chart: "subchartb-0.1.0"
+spec:
+  type: ClusterIP
+  ports:
+  - port: 80
+    targetPort: 80
+    protocol: TCP
+    name: nginx
+  selector:
+    app.kubernetes.io/name: subchartb
+---
+# Source: subchart/templates/service.yaml
+apiVersion: v1
+kind: Service
+metadata:
+  name: subchart
+  labels:
+    helm.sh/chart: "subchart-0.1.0"
+    app.kubernetes.io/instance: "release-name"
+    kube-version/major: "1"
+    kube-version/minor: "20"
+    kube-version/version: "v1.20.0"
+spec:
+  type: ClusterIP
+  ports:
+  - port: 80
+    targetPort: 80
+    protocol: TCP
+    name: nginx
+  selector:
+    app.kubernetes.io/name: subchart