handling map[interface {}]interface {} with toJson and mustJson

README.md

@@ -252,8 +252,7 @@ server server2.com
 Setup:
 
 ```bash
-go get github.com/noqcks/gucci
-go get github.com/onsi/ginkgo/ginkgo
+go get github.com/onsi/ginkgo/v2/ginkgo
 go get github.com/onsi/gomega
 ```
 

funcs.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"bytes"
+	"encoding/json"
 	"fmt"
 	"os/exec"
 	"strings"
@@ -19,9 +20,60 @@ func getFuncMap(t *template.Template) template.FuncMap {
 	f["shell"] = shell
 	f["toYaml"] = toYaml
 
+	f["toJson"] = toJson
+	f["mustToJson"] = mustToJson
+
 	return f
 }
 
+// toJson converts a value to JSON with special handling for map[interface{}]interface{}
+// This function overrides Sprig's toJson function to properly handle YAML-parsed data.
+// When working with templates, we often load data from YAML files which creates maps with
+// interface{} keys, but JSON only supports string keys. This implementation ensures that
+// data loaded from YAML (or other sources) with non-string keys is properly converted
+// before JSON serialization, preventing common "json: unsupported type" errors when
+// templates try to convert complex nested structures to JSON.
+func toJson(v interface{}) (string, error) {
+	// Convert any map[interface{}]interface{} to map[string]interface{}
+	jsonCompatible := convertToJSONCompatible(v)
+	data, err := json.Marshal(jsonCompatible)
+	if err != nil {
+		return "", errors.Wrap(err, "error calling toJson")
+	}
+	return string(data), nil
+}
+
+// mustToJson is like toJson but panics on error
+// we need to override this because sprig's mustToJson doesn't handle
+// map[interface{}]interface{} which is what we get from yaml
+func mustToJson(v interface{}) string {
+	s, err := toJson(v)
+	if err != nil {
+		panic(err)
+	}
+	return s
+}
+
+// convertToJSONCompatible converts YAML parsed data (with interface{} keys)
+// to data with only string keys for JSON compatibility
+func convertToJSONCompatible(v interface{}) interface{} {
+	switch v := v.(type) {
+	case map[interface{}]interface{}:
+		// Convert map with interface{} keys to map with string keys
+		result := make(map[string]interface{})
+		for k, v := range v {
+			result[fmt.Sprintf("%v", k)] = convertToJSONCompatible(v)
+		}
+		return result
+	case []interface{}:
+		// Convert each item in the slice
+		for i, item := range v {
+			v[i] = convertToJSONCompatible(item)
+		}
+	}
+	return v
+}
+
 func include(t *template.Template) func(templateName string, vars ...interface{}) (string, error) {
 	return func(templateName string, vars ...interface{}) (string, error) {
 		if len(vars) > 1 {

go.mod

@@ -1,36 +1,39 @@
 module github.com/noqcks/gucci
 
-go 1.22
+go 1.23.0
+
+toolchain go1.24.1
 
 require (
-	github.com/Masterminds/sprig/v3 v3.2.3
-	github.com/imdario/mergo v0.3.13
-	github.com/onsi/ginkgo/v2 v2.17.2
-	github.com/onsi/gomega v1.33.1
+	github.com/Masterminds/sprig/v3 v3.3.0
+	github.com/imdario/mergo v0.3.16
+	github.com/onsi/ginkgo/v2 v2.23.0
+	github.com/onsi/gomega v1.36.2
 	github.com/pkg/errors v0.9.1
-	github.com/urfave/cli v1.22.12
+	github.com/urfave/cli v1.22.16
 	gopkg.in/yaml.v2 v2.4.0
 )
 
 require (
+	dario.cat/mergo v1.0.1 // indirect
 	github.com/Masterminds/goutils v1.1.1 // indirect
-	github.com/Masterminds/semver/v3 v3.2.0 // indirect
-	github.com/cpuguy83/go-md2man/v2 v2.0.2 // indirect
-	github.com/go-logr/logr v1.4.1 // indirect
+	github.com/Masterminds/semver/v3 v3.3.1 // indirect
+	github.com/cpuguy83/go-md2man/v2 v2.0.6 // indirect
+	github.com/go-logr/logr v1.4.2 // indirect
 	github.com/go-task/slim-sprig/v3 v3.0.0 // indirect
 	github.com/google/go-cmp v0.6.0 // indirect
-	github.com/google/pprof v0.0.0-20240424215950-a892ee059fd6 // indirect
-	github.com/google/uuid v1.1.1 // indirect
-	github.com/huandu/xstrings v1.3.3 // indirect
-	github.com/mitchellh/copystructure v1.0.0 // indirect
-	github.com/mitchellh/reflectwalk v1.0.0 // indirect
+	github.com/google/pprof v0.0.0-20241210010833-40e02aabc2ad // indirect
+	github.com/google/uuid v1.6.0 // indirect
+	github.com/huandu/xstrings v1.5.0 // indirect
+	github.com/mitchellh/copystructure v1.2.0 // indirect
+	github.com/mitchellh/reflectwalk v1.0.2 // indirect
 	github.com/russross/blackfriday/v2 v2.1.0 // indirect
-	github.com/shopspring/decimal v1.2.0 // indirect
-	github.com/spf13/cast v1.3.1 // indirect
-	golang.org/x/crypto v0.31.0 // indirect
-	golang.org/x/net v0.33.0 // indirect
-	golang.org/x/sys v0.28.0 // indirect
-	golang.org/x/text v0.21.0 // indirect
-	golang.org/x/tools v0.21.1-0.20240508182429-e35e4ccd0d2d // indirect
+	github.com/shopspring/decimal v1.4.0 // indirect
+	github.com/spf13/cast v1.7.1 // indirect
+	golang.org/x/crypto v0.36.0 // indirect
+	golang.org/x/net v0.35.0 // indirect
+	golang.org/x/sys v0.31.0 // indirect
+	golang.org/x/text v0.23.0 // indirect
+	golang.org/x/tools v0.30.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -1,107 +1,85 @@
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 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
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 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

gucci.go

@@ -2,12 +2,13 @@ package main
 
 import (
 	"fmt"
-	"github.com/imdario/mergo"
 	"io"
 	"log"
 	"os"
 	"text/template"
 
+	"github.com/imdario/mergo"
+
 	"github.com/urfave/cli"
 )
 

test/integration/fixtures/issue63.tpl

@@ -0,0 +1,19 @@
+{{- $l := list $.testTwo $.testTwo -}}
+{{- range $i := $l }}
+  {{- range $j := $i }}
+    V ({{ kindOf $j }}): {{ $j | mustToJson | nindent 2 }}
+  {{- end }}
+{{- end }}
+
+{{- /* Test case for numeric and boolean keys */ -}}
+Numeric Keys (toJson): {{ $.testThree.numericKeys | toJson }}
+Boolean Keys (mustToJson): {{ $.testThree.booleanKeys | mustToJson }}
+
+{{- /* Test case for deeply nested structures */ -}}
+Deeply Nested (toJson): {{ $.testThree.deeplyNested | toJson }}
+
+{{- /* Test case for mixed array types */ -}}
+Mixed Array (mustToJson): {{ $.testThree.mixedArray | mustToJson }}
+
+{{- /* Test the entire structure */ -}}
+Complete testThree (toJson): {{ $.testThree | toJson }}