feat: csv-loader?

README.md

@@ -146,6 +146,24 @@ Creates a validation function for the given schema.
 - Special characters can be escaped with backslash: `\;`, `\[`, `\]`, `\\`
 - Empty arrays/tuples are not allowed
 
+## CSV Loader
+
+For loading CSV files with schema validation in rspack, see [csv-loader.md](./csv-loader.md).
+
+```javascript
+// rspack.config.js
+module.exports = {
+  module: {
+    rules: [
+      {
+        test: /\.schema\.csv$/,
+        use: 'inline-schema/csv-loader',
+      },
+    ],
+  },
+};
+```
+
 ## License
 
 ISC

csv-loader.md

@@ -0,0 +1,82 @@
+# inline-schema/csv-loader
+
+A rspack loader for CSV files that uses inline-schema for type validation.
+
+## Installation
+
+```bash
+npm install inline-schema
+```
+
+## Usage
+
+The loader expects:
+- **First row**: Property names (headers)
+- **Second row**: Inline-schema definitions for each property
+- **Remaining rows**: Data values
+
+### Example CSV
+
+```csv
+name,age,active,scores
+string,number,boolean,number[]
+Alice,30,true,[90; 85; 95]
+Bob,25,false,[75; 80; 70]
+```
+
+### rspack.config.js
+
+```javascript
+module.exports = {
+  module: {
+    rules: [
+      {
+        test: /\.schema\.csv$/,
+        use: {
+          loader: 'inline-schema/csv-loader',
+          options: {
+            delimiter: ',',
+            quote: '"',
+            escape: '\\',
+          },
+        },
+      },
+    ],
+  },
+};
+```
+
+### Importing in TypeScript
+
+```typescript
+import data from './data.schema.csv';
+
+// data = [
+//   { name: "Alice", age: 30, active: true, scores: [90, 85, 95] },
+//   { name: "Bob", age: 25, active: false, scores: [75, 80, 70] }
+// ]
+```
+
+## Options
+
+| Option | Type | Default | Description |
+|--------|------|---------|-------------|
+| `delimiter` | string | `,` | Column delimiter |
+| `quote` | string | `"` | Quote character |
+| `escape` | string | `\` | Escape character |
+
+## Schema Syntax
+
+Uses [inline-schema](https://github.com/your-repo/inline-schema) syntax:
+
+| Type | Schema | Example |
+|------|--------|---------|
+| String | `string` | `hello` |
+| Number | `number` | `42` |
+| Boolean | `boolean` | `true` |
+| Array | `string[]` or `[string][]` | `[a; b; c]` |
+| Tuple | `[string; number]` | `[hello; 42]` |
+
+## License
+
+ISC

package.json

@@ -9,26 +9,41 @@
       "types": "./dist/index.d.ts",
       "import": "./dist/index.mjs",
       "require": "./dist/index.js"
+    },
+    "./csv-loader": {
+      "types": "./dist/csv-loader/loader.d.ts",
+      "import": "./dist/csv-loader/loader.mjs",
+      "require": "./dist/csv-loader/loader.js"
     }
   },
   "scripts": {
-    "build": "tsup src/index.ts --format cjs,esm --dts",
+    "build": "tsup",
-    "dev": "tsup src/index.ts --format cjs,esm --dts --watch",
+    "dev": "tsup --watch",
     "test": "tsx src/test.ts"
   },
   "keywords": [
     "schema",
     "parser",
     "validator",
-    "typescript"
+    "typescript",
+    "rspack",
+    "loader",
+    "csv"
   ],
   "author": "",
   "license": "ISC",
   "description": "A TypeScript library for parsing and validating inline schemas",
+  "dependencies": {
+    "csv-parse": "^5.5.6"
+  },
   "devDependencies": {
+    "@rspack/core": "^1.1.6",
     "@types/node": "^25.5.0",
     "tsup": "^8.5.1",
     "tsx": "^4.21.0",
     "typescript": "^6.0.2"
+  },
+  "peerDependencies": {
+    "@rspack/core": "^1.x"
   }
 }

src/csv-loader/loader.ts

@@ -0,0 +1,85 @@
+import type { LoaderContext } from '@rspack/core';
+import { parse } from 'csv-parse/sync';
+import { parseSchema, createValidator, parseValue } from '../index.js';
+
+export interface CsvLoaderOptions {
+  delimiter?: string;
+  quote?: string;
+  escape?: string;
+}
+
+interface PropertyConfig {
+  name: string;
+  schema: any;
+  validator: (value: unknown) => boolean;
+  parser: (valueString: string) => unknown;
+}
+
+export default function csvLoader(
+  this: LoaderContext<CsvLoaderOptions>,
+  content: string
+): string {
+  const options = this.getOptions() || {};
+  const delimiter = options.delimiter ?? ',';
+  const quote = options.quote ?? '"';
+  const escape = options.escape ?? '\\';
+
+  const records = parse(content, {
+    delimiter,
+    quote,
+    escape,
+    relax_column_count: true,
+  });
+
+  if (records.length < 2) {
+    throw new Error('CSV must have at least 2 rows: headers and schemas');
+  }
+
+  const headers = records[0];
+  const schemas = records[1];
+
+  if (headers.length !== schemas.length) {
+    throw new Error(
+      `Header count (${headers.length}) does not match schema count (${schemas.length})`
+    );
+  }
+
+  const propertyConfigs: PropertyConfig[] = headers.map((header: string, index: number) => {
+    const schemaString = schemas[index];
+    const schema = parseSchema(schemaString);
+    return {
+      name: header,
+      schema,
+      validator: createValidator(schema),
+      parser: (valueString: string) => parseValue(schema, valueString),
+    };
+  });
+
+  const dataRows = records.slice(2);
+  const objects = dataRows.map((row: string[], rowIndex: number) => {
+    const obj: Record<string, unknown> = {};
+    propertyConfigs.forEach((config, colIndex) => {
+      const rawValue = row[colIndex] ?? '';
+      try {
+        const parsed = config.parser(rawValue);
+        if (!config.validator(parsed)) {
+          throw new Error(
+            `Validation failed for property "${config.name}" at row ${rowIndex + 3}: ${rawValue}`
+          );
+        }
+        obj[config.name] = parsed;
+      } catch (error) {
+        if (error instanceof Error) {
+          throw new Error(
+            `Failed to parse property "${config.name}" at row ${rowIndex + 3}, column ${colIndex + 1}: ${error.message}`
+          );
+        }
+        throw error;
+      }
+    });
+    return obj;
+  });
+
+  const json = JSON.stringify(objects, null, 2);
+  return `export default ${json};`;
+}

tsconfig.json

@@ -3,18 +3,17 @@
     "target": "ES2020",
     "module": "ESNext",
     "lib": ["ES2020"],
-    "types": ["node"],
+    "moduleResolution": "node",
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "forceConsistentCasingInFileNames": true,
+    "strict": true,
     "declaration": true,
     "declarationMap": true,
     "sourceMap": true,
     "outDir": "./dist",
-    "strict": true,
+    "rootDir": "./src"
-    "esModuleInterop": true,
-    "skipLibCheck": true,
-    "forceConsistentCasingInFileNames": true,
-    "moduleResolution": "bundler",
-    "ignoreDeprecations": "6.0"
   },
   "include": ["src/**/*"],
-  "exclude": ["node_modules", "dist"]
+  "exclude": ["node_modules", "dist", "src/csv-loader"]
 }

tsup.config.ts

@@ -0,0 +1,19 @@
+import { defineConfig } from 'tsup';
+
+export default defineConfig([
+  {
+    entry: ['src/index.ts'],
+    format: ['cjs', 'esm'],
+    dts: true,
+    outDir: 'dist',
+    clean: true,
+  },
+  {
+    entry: ['src/csv-loader/loader.ts'],
+    format: ['cjs', 'esm'],
+    dts: true,
+    outDir: 'dist/csv-loader',
+    external: ['@rspack/core', 'csv-parse'],
+    clean: false,
+  },
+]);