Add UserConfig jsonschema generation script

2 files changed, 120 insertions, 0 deletions

diff --git a/pkg/jsonschema/generate.go b/pkg/jsonschema/generate.go
new file mode 100644
index 000000000..38b582844
--- /dev/null
+++ b/pkg/jsonschema/generate.go
@@ -0,0 +1,106 @@
+//go:generate go run generator.go
+
+package jsonschema
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+	"reflect"
+
+	"github.com/jesseduffield/lazycore/pkg/utils"
+	"github.com/jesseduffield/lazygit/pkg/config"
+	"github.com/karimkhaleel/jsonschema"
+)
+
+func GetSchemaDir() string {
+	return utils.GetLazyRootDirectory() + "/schema"
+}
+
+func GenerateSchema() {
+	schema := customReflect(&config.UserConfig{})
+	obj, _ := json.MarshalIndent(schema, "", "  ")
+
+	if err := os.WriteFile(GetSchemaDir()+"/config.json", obj, 0o644); err != nil {
+		fmt.Println("Error writing to file:", err)
+		return
+	}
+}
+
+func customReflect(v *config.UserConfig) *jsonschema.Schema {
+	defaultConfig := config.GetDefaultConfig()
+	r := &jsonschema.Reflector{FieldNameTag: "yaml", RequiredFromJSONSchemaTags: true, DoNotReference: true}
+	if err := r.AddGoComments("github.com/jesseduffield/lazygit/pkg/config", "../config"); err != nil {
+		panic(err)
+	}
+	schema := r.Reflect(v)
+
+	setDefaultVals(defaultConfig, schema)
+
+	return schema
+}
+
+func setDefaultVals(defaults any, schema *jsonschema.Schema) {
+	t := reflect.TypeOf(defaults)
+	v := reflect.ValueOf(defaults)
+
+	if t.Kind() == reflect.Ptr || t.Kind() == reflect.Interface {
+		t = t.Elem()
+		v = v.Elem()
+	}
+
+	for i := 0; i < t.NumField(); i++ {
+		value := v.Field(i).Interface()
+		parentKey := t.Field(i).Name
+
+		key, ok := schema.OriginalPropertiesMapping[parentKey]
+		if !ok {
+			continue
+		}
+
+		subSchema, ok := schema.Properties.Get(key)
+		if !ok {
+			continue
+		}
+
+		if isStruct(value) {
+			setDefaultVals(value, subSchema)
+		} else if !isZeroValue(value) {
+			subSchema.Default = value
+		}
+	}
+}
+
+func isZeroValue(v any) bool {
+	switch v := v.(type) {
+	case int, int32, int64, float32, float64:
+		return v == 0
+	case string:
+		return v == ""
+	case bool:
+		return !v
+	case nil:
+		return true
+	}
+
+	rv := reflect.ValueOf(v)
+	switch rv.Kind() {
+	case reflect.Slice, reflect.Map:
+		return rv.Len() == 0
+	case reflect.Ptr, reflect.Interface:
+		return rv.IsNil()
+	case reflect.Struct:
+		for i := 0; i < rv.NumField(); i++ {
+			if !isZeroValue(rv.Field(i).Interface()) {
+				return false
+			}
+		}
+		return true
+	default:
+		return false
+	}
+}
+
+func isStruct(v any) bool {
+	return reflect.TypeOf(v).Kind() == reflect.Struct
+}
diff --git a/pkg/jsonschema/generator.go b/pkg/jsonschema/generator.go
new file mode 100644
index 000000000..263f4784b
--- /dev/null
+++ b/pkg/jsonschema/generator.go
@@ -0,0 +1,14 @@
+//go:build ignore
+
+package main
+
+import (
+	"fmt"
+
+	"github.com/jesseduffield/lazygit/pkg/jsonschema"
+)
+
+func main() {
+	fmt.Printf("Generating jsonschema in %s...\n", jsonschema.GetSchemaDir())
+	jsonschema.GenerateSchema()
+}