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.esbuild/util.cjs

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+/** @typedef {import('esbuild').BuildOptions} Options */
+
+/**
+ * @param {Options} override
+ * @returns {Options}
+ */
+const buildOptions = (override = {}) => {
+  return {
+    bundle: true,
+    minify: true,
+    keepNames: true,
+    globalName: 'mermaid',
+    platform: 'browser',
+    resolveExtensions: ['.js', '.json', '.jison'],
+    external: ['require', 'fs', 'path'],
+    entryPoints: ['src/mermaid.js'],
+    outfile: 'dist/mermaid.min.js',
+    plugins: [jisonPlugin],
+    sourcemap: 'external',
+    ...override,
+  };
+};
+
+exports.esmBuild = ({ minify = true } = {}) => {
+  return buildOptions({
+    format: 'esm',
+    outfile: `dist/mermaid.esm${minify ? '.min' : ''}.mjs`,
+    minify,
+  });
+};
+
+exports.umdBuild = ({ minify = true } = {}) => {
+  return buildOptions({ outfile: `dist/mermaid${minify ? '.min' : ''}.js`, minify });
+};
+
+const jisonPlugin = {
+  name: 'jison',
+  setup(build) {
+    const { Generator } = require('jison');
+    let fs = require('fs');
+
+    build.onLoad({ filter: /\.jison$/ }, async (args) => {
+      // Load the file from the file system
+      let source = await fs.promises.readFile(args.path, 'utf8');
+
+      try {
+        let contents = new Generator(source, {}).generate();
+        return { contents, warnings: [] };
+      } catch (e) {
+        return { errors: [] };
+      }
+    });
+  },
+};