feat: add inline-schema/csv-loader/rollup for tsup/vite

src/csv-loader/rollup.ts

@@ -0,0 +1,89 @@
+import type { Plugin } from 'rollup';
+import type { CsvLoaderOptions } from './loader.js';
+import { csvToModule } from './loader.js';
+import * as path from 'path';
+import * as fs from 'fs';
+
+export interface CsvRollupOptions extends CsvLoaderOptions {
+  /** Include pattern for CSV files (default: /\.csv$/) */
+  include?: RegExp | string | Array<RegExp | string>;
+  /** Exclude pattern for CSV files */
+  exclude?: RegExp | string | Array<RegExp | string>;
+}
+
+function matchesPattern(
+  id: string,
+  pattern: RegExp | string | Array<RegExp | string> | undefined
+): boolean {
+  if (!pattern) return true;
+  const patterns = Array.isArray(pattern) ? pattern : [pattern];
+  return patterns.some((p) => {
+    if (p instanceof RegExp) {
+      return p.test(id);
+    }
+    return id.includes(p);
+  });
+}
+
+/**
+ * Rollup plugin for loading CSV files with inline-schema validation.
+ * Works with both Vite and Tsup (esbuild).
+ */
+export function csvLoader(options: CsvRollupOptions = {}): Plugin {
+  const {
+    include = /\.csv$/,
+    exclude,
+    emitTypes = true,
+    typesOutputDir = '',
+    writeToDisk = false,
+    ...parseOptions
+  } = options;
+
+  return {
+    name: 'inline-schema-csv',
+
+    transform(code: string, id: string) {
+      // Check if file matches the include/exclude patterns
+      if (!matchesPattern(id, include)) return null;
+      if (exclude && matchesPattern(id, exclude)) return null;
+
+      // Only process .csv files
+      if (!id.endsWith('.csv')) return null;
+
+      const result = csvToModule(code, {
+        ...parseOptions,
+        emitTypes,
+      });
+
+      // Emit type definition file if enabled
+      if (emitTypes && result.dts) {
+        const dtsPath = typesOutputDir
+          ? path.join(typesOutputDir, path.basename(id) + '.d.ts')
+          : id + '.d.ts';
+
+        if (writeToDisk) {
+          // Write directly to disk
+          const absolutePath = path.isAbsolute(dtsPath)
+            ? dtsPath
+            : path.join(process.cwd(), dtsPath);
+          fs.mkdirSync(path.dirname(absolutePath), { recursive: true });
+          fs.writeFileSync(absolutePath, result.dts);
+        } else {
+          // Emit to Rollup's virtual module system
+          this.emitFile({
+            type: 'asset',
+            fileName: dtsPath,
+            source: result.dts,
+          });
+        }
+      }
+
+      return {
+        code: result.js,
+        map: null,
+      };
+    },
+  };
+}
+
+export default csvLoader;