Repository: helm/helm (go)

Issue:
typeIs/typeOf behavior has changed since helm 3.18.0
With helm 3.18.0, there is a change in `typeIs`/`typeOf` gotemplate behavior.

For example in:
https://github.com/oauth2-proxy/manifests/blob/4001c2385dc72990add71437b02e18d7ec7f8ffd/helm/oauth2-proxy/templates/_ingress.tpl#L40-L44

While debugging, we saw that `typeOf .servicePort` has changed from `float64` to `json.Number`.

This could be a bad practice from the chart (that should probably use `KindIs`), but this is widely used and could break many charts.

Step to reproduce:

Helm 3.17.3:
```sh
$ helm repo add oauth2-proxy https://oauth2-proxy.github.io/manifests
"oauth2-proxy" has been added to your repositories

$ helm version
version.BuildInfo{Version:"v3.17.3", GitCommit:"e4da49785aa6e6ee2b86efd5dd9e43400318262b", GitTreeState:"clean", GoVersion:"go1.23.7"}

$ cat <<EOF | helm template demo oauth2-proxy/oauth2-proxy -f -
{
  "ingress": {
    "enabled": true,
    "hosts": ["demo.fr"]
  }
}
EOF
[...]
# Source: oauth2-proxy/templates/ingress.yaml
[...]
spec:
  rules:
    - host: "demo.fr"
      http:
        paths:
          - path: /
            pathType: ImplementationSpecific
            backend:
              service:
                name: demo-oauth2-proxy
                port:
                  number: 80                                         <==== OK
```

Helm 3.18.0:
```sh
$ helm version
version.BuildInfo{Version:"v3.18.0", GitCommit:"cc58e3f5a3aa615c6a86275e6f4444b5fdd3cc4e", GitTreeState:"clean", GoVersion:"go1.24.3"}

$ cat <<EOF | helm template demo oauth2-proxy/oauth2-proxy -f -
{
  "ingress": {
    "enabled": true,
    "hosts": ["demo.fr"]
  }
}
EOF
[...]
# Source: oauth2-proxy/templates/ingress.yaml
[...]
spec:
  rules:
    - host: "demo.fr"
      http:
        paths:
          - path: /
            pathType: ImplementationSpecific
            backend:
              service:
                name: demo-oauth2-proxy
                port:                                            <======= missing
```

Pull request description:
Reverting fix "renders int as float"
This reverts #13533

This change has caused issues with numerous charts around things unrelated to toml. This is because of functions like typeIs/typeOf being used and acted upon.

The change caused a significant regression.

Note: This kind of change can be put into v3 charts, that are in active development, without causing a regression.

Closes #30880

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**What this PR does / why we need it**: There is regression caused by #13533 and its backport.

**Special notes for your reviewer**: This change can later be folded into the next generation of charts safely.

**If applicable**:
- [ ] this PR contains user facing changes (the `docs needed` label should be applied if so)
- [ ] this PR contains unit tests
- [ ] this PR has been tested for backwards compatibility


Patch:
diff --git a/pkg/chart/v2/loader/load.go b/pkg/chart/v2/loader/load.go
index f0905e508..75c73e959 100644
--- a/pkg/chart/v2/loader/load.go
+++ b/pkg/chart/v2/loader/load.go
@@ -19,7 +19,6 @@ package loader
 import (
 	"bufio"
 	"bytes"
-	"encoding/json"
 	"errors"
 	"fmt"
 	"io"
@@ -224,10 +223,7 @@ func LoadValues(data io.Reader) (map[string]interface{}, error) {
 			}
 			return nil, fmt.Errorf("error reading yaml document: %w", err)
 		}
-		if err := yaml.Unmarshal(raw, &currentMap, func(d *json.Decoder) *json.Decoder {
-			d.UseNumber()
-			return d
-		}); err != nil {
+		if err := yaml.Unmarshal(raw, &currentMap); err != nil {
 			return nil, fmt.Errorf("cannot unmarshal yaml document: %w", err)
 		}
 		values = MergeMaps(values, currentMap)
diff --git a/pkg/chart/v2/util/values.go b/pkg/chart/v2/util/values.go
index 42b1a28e8..6850e8b9b 100644
--- a/pkg/chart/v2/util/values.go
+++ b/pkg/chart/v2/util/values.go
@@ -17,7 +17,6 @@ limitations under the License.
 package util
 
 import (
-	"encoding/json"
 	"errors"
 	"fmt"
 	"io"
@@ -106,10 +105,7 @@ func tableLookup(v Values, simple string) (Values, error) {
 
 // ReadValues will parse YAML byte data into a Values.
 func ReadValues(data []byte) (vals Values, err error) {
-	err = yaml.Unmarshal(data, &vals, func(d *json.Decoder) *json.Decoder {
-		d.UseNumber()
-		return d
-	})
+	err = yaml.Unmarshal(data, &vals)
 	if len(vals) == 0 {
 		vals = Values{}
 	}


Test patch:
diff --git a/pkg/chart/v2/util/dependencies_test.go b/pkg/chart/v2/util/dependencies_test.go
index 07b2441e2..5947eac69 100644
--- a/pkg/chart/v2/util/dependencies_test.go
+++ b/pkg/chart/v2/util/dependencies_test.go
@@ -15,7 +15,6 @@ limitations under the License.
 package util
 
 import (
-	"encoding/json"
 	"os"
 	"path/filepath"
 	"sort"
@@ -238,20 +237,6 @@ func TestProcessDependencyImportValues(t *testing.T) {
 			if b := strconv.FormatBool(pv); b != vv {
 				t.Errorf("failed to match imported bool value %v with expected %v for key %q", b, vv, kk)
 			}
-		case json.Number:
-			if fv, err := pv.Float64(); err == nil {
-				if sfv := strconv.FormatFloat(fv, 'f', -1, 64); sfv != vv {
-					t.Errorf("failed to match imported float value %v with expected %v for key %q", sfv, vv, kk)
-				}
-			}
-			if iv, err := pv.Int64(); err == nil {
-				if siv := strconv.FormatInt(iv, 10); siv != vv {
-					t.Errorf("failed to match imported int value %v with expected %v for key %q", siv, vv, kk)
-				}
-			}
-			if pv.String() != vv {
-				t.Errorf("failed to match imported string value %q with expected %q for key %q", pv, vv, kk)
-			}
 		default:
 			if pv != vv {
 				t.Errorf("failed to match imported string value %q with expected %q for key %q", pv, vv, kk)
@@ -356,10 +341,6 @@ func TestProcessDependencyImportValuesMultiLevelPrecedence(t *testing.T) {
 			if s := strconv.FormatFloat(pv, 'f', -1, 64); s != vv {
 				t.Errorf("failed to match imported float value %v with expected %v", s, vv)
 			}
-		case json.Number:
-			if pv.String() != vv {
-				t.Errorf("failed to match imported string value %q with expected %q", pv, vv)
-			}
 		default:
 			if pv != vv {
 				t.Errorf("failed to match imported string value %q with expected %q", pv, vv)
diff --git a/pkg/cmd/template_test.go b/pkg/cmd/template_test.go
index c478fced4..a6c848e08 100644
--- a/pkg/cmd/template_test.go
+++ b/pkg/cmd/template_test.go
@@ -22,18 +22,6 @@ import (
 	"testing"
 )
 
-func TestTemplateCmdWithToml(t *testing.T) {
-
-	tests := []cmdTestCase{
-		{
-			name:   "check toToml function rendering",
-			cmd:    fmt.Sprintf("template '%s'", "testdata/testcharts/issue-totoml"),
-			golden: "output/issue-totoml.txt",
-		},
-	}
-	runTestCmd(t, tests)
-}
-
 var chartPath = "testdata/testcharts/subchart"
 
 func TestTemplateCmd(t *testing.T) {
diff --git a/pkg/cmd/testdata/output/issue-totoml.txt b/pkg/cmd/testdata/output/issue-totoml.txt
deleted file mode 100644
index 06cf4bb8d..000000000
--- a/pkg/cmd/testdata/output/issue-totoml.txt
+++ /dev/null
@@ -1,8 +0,0 @@
----
-# Source: issue-totoml/templates/configmap.yaml
-apiVersion: v1
-kind: ConfigMap
-metadata:
-  name: issue-totoml
-data: |
-  key = 13
diff --git a/pkg/cmd/testdata/testcharts/issue-totoml/Chart.yaml b/pkg/cmd/testdata/testcharts/issue-totoml/Chart.yaml
deleted file mode 100644
index f4be7a213..000000000
--- a/pkg/cmd/testdata/testcharts/issue-totoml/Chart.yaml
+++ /dev/null
@@ -1,3 +0,0 @@
-apiVersion: v2
-name: issue-totoml
-version: 0.1.0
diff --git a/pkg/cmd/testdata/testcharts/issue-totoml/templates/configmap.yaml b/pkg/cmd/testdata/testcharts/issue-totoml/templates/configmap.yaml
deleted file mode 100644
index 621e70d48..000000000
--- a/pkg/cmd/testdata/testcharts/issue-totoml/templates/configmap.yaml
+++ /dev/null
@@ -1,6 +0,0 @@
-apiVersion: v1
-kind: ConfigMap
-metadata:
-  name: issue-totoml
-data: |
-  {{ .Values.global | toToml }}
diff --git a/pkg/cmd/testdata/testcharts/issue-totoml/values.yaml b/pkg/cmd/testdata/testcharts/issue-totoml/values.yaml
deleted file mode 100644
index dd0140449..000000000
--- a/pkg/cmd/testdata/testcharts/issue-totoml/values.yaml
+++ /dev/null
@@ -1,2 +0,0 @@
-global:
-  key: 13
\ No newline at end of file