feat: null safety

nullSafetyCheck/nullSafetyCheck.go

@@ -0,0 +1,44 @@
+package nullSafetyCheck
+
+import (
+	"go/ast"
+	"golang.org/x/tools/go/analysis"
+	"gormlint/common"
+	"strings"
+)
+
+var NullSafetyAnalyzer = &analysis.Analyzer{
+	Name: "nullSafety",
+	Doc:  "reports inconsistency of nullable values",
+	Run:  run,
+}
+
+func run(pass *analysis.Pass) (any, error) {
+	for _, file := range pass.Files {
+		ast.Inspect(file, func(node ast.Node) bool {
+			typeSpec, ok := node.(*ast.TypeSpec)
+			if !ok {
+				return true
+			}
+			structure, ok := typeSpec.Type.(*ast.StructType)
+			if !ok {
+				return true
+			}
+
+			common.CheckUnnamedModel(*pass, *typeSpec)
+
+			for _, field := range structure.Fields.List {
+				common.CheckUnnamedField(*pass, typeSpec.Name.Name, *field)
+				if field.Tag != nil {
+					tagWithoutQuotes := field.Tag.Value[1 : len(field.Tag.Value)-1]
+					tagWithoutSemicolons := strings.ReplaceAll(tagWithoutQuotes, ";", ",")
+					common.CheckFieldNullConsistency(*pass, *field, typeSpec.Name.Name, tagWithoutSemicolons)
+				} else {
+					// TODO: check necessary tags for some fields
+				}
+			}
+			return false
+		})
+	}
+	return nil, nil
+}