esbuild-yaml/dist/index.mjs

An esbuild plugin, that allows imports of YAML files

import { readFile } from 'node:fs/promises';
import path from 'node:path';
import { parseAllDocuments, parse } from 'yaml';

// src/index.ts
function YAMLPlugin(options = {}) {
  const type = options.type || "single";
  const parserOptions = options.parserOptions || {};
  return {
    name: "yaml",
    setup(build) {
      build.onResolve({ filter: /\.ya?ml$/ }, (args) => {
        if (args.resolveDir === "") return;
        return {
          path: path.isAbsolute(args.path) ? args.path : path.join(args.resolveDir, args.path),
          namespace: "yaml"
        };
      });
      build.onLoad({ filter: /\.ya?ml$/, namespace: "yaml" }, async (args) => {
        const yamlContent = await readFile(args.path, "utf8");
        let parsed = {};
        if (type === "multi") {
          parsed = parseAllDocuments(yamlContent, parserOptions).map((doc) => doc.toJSON());
        } else {
          parsed = parse(yamlContent, parserOptions);
        }
        let content = parsed;
        if (options.transform != null && typeof options.transform === "function") {
          const transformed = options.transform(content, args.path);
          if (transformed != null) {
            content = transformed;
          }
        }
        const code = `var data = ${JSON.stringify(content, null, 2)};

`;
        return {
          loader: "js",
          contents: `${code}
export default data;`
        };
      });
      build.onResolve({ filter: /\.ya?ml\?raw$/ }, (args) => {
        if (args.resolveDir === "") return;
        if (args.path.endsWith("?raw")) {
          args.path = args.path.slice(0, -4);
        }
        return {
          path: path.isAbsolute(args.path) ? args.path : path.join(args.resolveDir, args.path),
          namespace: "yaml-raw"
        };
      });
      build.onLoad({ filter: /\.ya?ml$/, namespace: "yaml-raw" }, async (args) => {
        const yamlContent = await readFile(args.path, "utf8");
        return {
          loader: "text",
          contents: yamlContent
        };
      });
    }
  };
}
var index_default = YAMLPlugin;

export { YAMLPlugin, index_default as default };