✨ add option to disable variable interpolation

packages/envied/lib/src/envied_base.dart

@@ -72,6 +72,11 @@ final class Envied {
   /// ```
   final bool useConstantCase;
 
+  /// Whether to interpolate the values for all fields.
+  /// If [interpolate] is `true`, the value will be interpolated
+  /// with the environment variables.
+  final bool interpolate;
+
   /// Whether to use the raw string format for all string values.
   ///
   /// **NOTE**: The string is always formatted `'<value>'`.
@@ -88,6 +93,7 @@ final class Envied {
     this.obfuscate = false,
     this.allowOptionalFields = false,
     this.useConstantCase = false,
+    this.interpolate = true,
     this.rawStrings = false,
   })  : path = path ?? '.env',
         requireEnvFile = requireEnvFile ?? false;
@@ -138,6 +144,11 @@ final class EnviedField {
   /// ```
   final bool? useConstantCase;
 
+  /// Whether to use the interpolated value for the field.
+  /// If [interpolate] is `true`, the value will be interpolated
+  /// with the environment variables.
+  final bool? interpolate;
+
   /// Whether to use the raw string format for the value.
   ///
   /// Can only be used with a [String] type.
@@ -155,6 +166,7 @@ final class EnviedField {
     this.defaultValue,
     this.optional,
     this.useConstantCase,
+    this.interpolate,
     this.rawString,
   });
 }

packages/envied_generator/lib/src/generate_field.dart

@@ -1,7 +1,6 @@
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/dart/element/type.dart';
 import 'package:code_builder/code_builder.dart';
-import 'package:envied_generator/src/env_val.dart';
 import 'package:envied_generator/src/extensions.dart';
 import 'package:source_gen/source_gen.dart';
 
@@ -14,7 +13,7 @@ import 'package:source_gen/source_gen.dart';
 /// the type can't be casted, or is not supported.
 Iterable<Field> generateFields(
   FieldElement field,
-  EnvVal? value, {
+  String? value, {
   bool allowOptional = false,
   bool rawString = false,
 }) {
@@ -55,7 +54,7 @@ Iterable<Field> generateFields(
     if (field.type.isDartCoreInt ||
         field.type.isDartCoreDouble ||
         field.type.isDartCoreNum) {
-      final num? parsed = num.tryParse(value.interpolated);
+      final num? parsed = num.tryParse(value);
 
       if (parsed == null) {
         throw InvalidGenerationSourceError(
@@ -67,7 +66,7 @@ Iterable<Field> generateFields(
       modifier = FieldModifier.constant;
       result = literalNum(parsed);
     } else if (field.type.isDartCoreBool) {
-      final bool? parsed = bool.tryParse(value.interpolated);
+      final bool? parsed = bool.tryParse(value);
 
       if (parsed == null) {
         throw InvalidGenerationSourceError(
@@ -79,7 +78,7 @@ Iterable<Field> generateFields(
       modifier = FieldModifier.constant;
       result = literalBool(parsed);
     } else if (field.type.isDartCoreUri) {
-      final Uri? parsed = Uri.tryParse(value.interpolated);
+      final Uri? parsed = Uri.tryParse(value);
 
       if (parsed == null) {
         throw InvalidGenerationSourceError(
@@ -92,11 +91,11 @@ Iterable<Field> generateFields(
       result = refer('Uri').type.newInstanceNamed(
         'parse',
         [
-          literalString(value.interpolated),
+          literalString(value),
         ],
       );
     } else if (field.type.isDartCoreDateTime) {
-      final DateTime? parsed = DateTime.tryParse(value.interpolated);
+      final DateTime? parsed = DateTime.tryParse(value);
 
       if (parsed == null) {
         throw InvalidGenerationSourceError(
@@ -109,13 +108,13 @@ Iterable<Field> generateFields(
       result = refer('DateTime').type.newInstanceNamed(
         'parse',
         [
-          literalString(value.interpolated),
+          literalString(value),
         ],
       );
     } else if (field.type.isDartEnum) {
       final EnumElement enumElement = field.type.element as EnumElement;
 
-      if (!enumElement.valueNames.contains(value.interpolated)) {
+      if (!enumElement.valueNames.contains(value)) {
         throw InvalidGenerationSourceError(
           'Enumerated type `$type` does not contain value `$value`. '
           'Possible values are: ${enumElement.valueNames.map((el) => '`$el`').join(', ')}.',
@@ -126,18 +125,15 @@ Iterable<Field> generateFields(
       modifier = FieldModifier.final$;
       result = refer(type).type.property('values').property('byName').call(
         [
-          literalString(value.interpolated),
+          literalString(value),
         ],
       );
     } else if (field.type.isDartCoreString) {
       modifier = FieldModifier.constant;
-      result = switch (rawString) {
-        true => literalString(value.raw, raw: true),
-        _ => literalString(value.interpolated),
-      };
+      result = literalString(value, raw: rawString);
     } else if (field.type is DynamicType) {
       modifier = FieldModifier.constant;
-      result = literalString(value.interpolated);
+      result = literalString(value);
     } else {
       throw InvalidGenerationSourceError(
         'Envied can only handle types such as `int`, `double`, `num`, '

packages/envied_generator/lib/src/generate_field_encrypted.dart

@@ -4,7 +4,6 @@ import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/dart/element/nullability_suffix.dart';
 import 'package:analyzer/dart/element/type.dart';
 import 'package:code_builder/code_builder.dart';
-import 'package:envied_generator/src/env_val.dart';
 import 'package:envied_generator/src/extensions.dart';
 import 'package:source_gen/source_gen.dart';
 
@@ -17,7 +16,7 @@ import 'package:source_gen/source_gen.dart';
 /// the type can't be casted, or is not supported.
 Iterable<Field> generateFieldsEncrypted(
   FieldElement field,
-  EnvVal? value, {
+  String? value, {
   bool allowOptional = false,
 }) {
   final Random rand = Random.secure();
@@ -67,7 +66,7 @@ Iterable<Field> generateFieldsEncrypted(
   }
 
   if (field.type.isDartCoreInt) {
-    final int? parsed = int.tryParse(value.interpolated);
+    final int? parsed = int.tryParse(value);
 
     if (parsed == null) {
       throw InvalidGenerationSourceError(
@@ -105,7 +104,7 @@ Iterable<Field> generateFieldsEncrypted(
   }
 
   if (field.type.isDartCoreBool) {
-    final bool? parsed = bool.tryParse(value.interpolated);
+    final bool? parsed = bool.tryParse(value);
 
     if (parsed == null) {
       throw InvalidGenerationSourceError(
@@ -149,12 +148,10 @@ Iterable<Field> generateFieldsEncrypted(
       field.type.isDartEnum ||
       field.type.isDartCoreString ||
       field.type is DynamicType) {
-    if ((field.type.isDartCoreUri &&
-            Uri.tryParse(value.interpolated) == null) ||
-        (field.type.isDartCoreDateTime &&
-            DateTime.tryParse(value.interpolated) == null) ||
+    if ((field.type.isDartCoreUri && Uri.tryParse(value) == null) ||
+        (field.type.isDartCoreDateTime && DateTime.tryParse(value) == null) ||
         ((field.type.isDartCoreDouble || field.type.isDartCoreNum) &&
-            num.tryParse(value.interpolated) == null)) {
+            num.tryParse(value) == null)) {
       throw InvalidGenerationSourceError(
         'Type `$type` does not align with value `$value`.',
         element: field,
@@ -164,7 +161,7 @@ Iterable<Field> generateFieldsEncrypted(
     if (field.type.isDartEnum) {
       final EnumElement enumElement = field.type.element as EnumElement;
 
-      if (!enumElement.valueNames.contains(value.interpolated)) {
+      if (!enumElement.valueNames.contains(value)) {
         throw InvalidGenerationSourceError(
           'Enumerated type `$type` does not contain value `$value`. '
           'Possible values are: ${enumElement.valueNames.map((el) => '`$el`').join(', ')}.',
@@ -175,7 +172,7 @@ Iterable<Field> generateFieldsEncrypted(
 
     late final String? symbol;
     late final Expression result;
-    final List<int> parsed = value.interpolated.codeUnits;
+    final List<int> parsed = value.codeUnits;
     final List<int> key = [
       for (int i = 0; i < parsed.length; i++) rand.nextInt(1 << 32)
     ];

packages/envied_generator/lib/src/generator.dart

@@ -52,6 +52,7 @@ final class EnviedGenerator extends GeneratorForAnnotation<Envied> {
           annotation.read('allowOptionalFields').literalValue as bool? ?? false,
       useConstantCase:
           annotation.read('useConstantCase').literalValue as bool? ?? false,
+      interpolate: annotation.read('interpolate').literalValue as bool? ?? true,
       rawStrings: annotation.read('rawStrings').literalValue as bool? ?? false,
     );
 
@@ -135,6 +136,9 @@ final class EnviedGenerator extends GeneratorForAnnotation<Envied> {
     final bool optional = reader.read('optional').literalValue as bool? ??
         config.allowOptionalFields;
 
+    final bool interpolate =
+        reader.read('interpolate').literalValue as bool? ?? config.interpolate;
+
     final bool rawString =
         reader.read('rawString').literalValue as bool? ?? config.rawStrings;
 
@@ -149,8 +153,16 @@ final class EnviedGenerator extends GeneratorForAnnotation<Envied> {
     }
 
     return reader.read('obfuscate').literalValue as bool? ?? config.obfuscate
-        ? generateFieldsEncrypted(field, varValue, allowOptional: optional)
-        : generateFields(field, varValue,
-            allowOptional: optional, rawString: rawString);
+        ? generateFieldsEncrypted(
+            field,
+            interpolate ? varValue?.interpolated : varValue?.raw,
+            allowOptional: optional,
+          )
+        : generateFields(
+            field,
+            interpolate ? varValue?.interpolated : varValue?.raw,
+            allowOptional: optional,
+            rawString: rawString,
+          );
   }
 }

packages/envied_generator/test/src/generator_tests.dart

@@ -122,13 +122,13 @@ final class _Env8 {
 abstract class Env8 {
   @EnviedField()
   static const String? testString = null;
-  @EnviedField(rawString: true)
+  @EnviedField(rawString: true, interpolate: false)
   static const String? testUnescapedString = null;
-  @EnviedField(rawString: true)
+  @EnviedField(rawString: true, interpolate: false)
   static const String? testUnescapedString2 = null;
-  @EnviedField(rawString: true)
+  @EnviedField(rawString: true, interpolate: false)
   static const String? testUnescapedString3 = null;
-  @EnviedField(rawString: true)
+  @EnviedField(rawString: true, interpolate: false)
   static const String? testUnescapedString4 = null;
   @EnviedField()
   static const int? testInt = null;