chore: Add tiny bundle

Excludes elk and mindmap at build time

.esbuild/build.ts

@@ -6,7 +6,9 @@ import { packageOptions } from '../.build/common.js';
 const shouldVisualize = process.argv.includes('--visualize');
 
 const buildPackage = async (entryName: keyof typeof packageOptions) => {
+  // package.mjs
   await build(getBuildConfig({ entryName, minify: false }));
+  // package.min.mjs
   const { metafile } = await build(
     getBuildConfig({ entryName, minify: true, metafile: shouldVisualize })
   );
@@ -14,8 +16,27 @@ const buildPackage = async (entryName: keyof typeof packageOptions) => {
     // Upload metafile into https://esbuild.github.io/analyze/
     await writeFile(`stats/meta-${entryName}.json`, JSON.stringify(metafile));
   }
+  // package.core.mjs
   await build(getBuildConfig({ entryName, minify: false, core: true }));
-  await build(getBuildConfig({ entryName, minify: true, format: 'iife' }));
+  if (entryName === 'mermaid') {
+    // mermaid.js
+    await build(getBuildConfig({ entryName, minify: false, format: 'iife' }));
+    // mermaid.min.js
+    await build(getBuildConfig({ entryName, minify: true, format: 'iife' }));
+    // mermaid.tiny.min.js
+    const { metafile } = await build(
+      getBuildConfig({
+        entryName,
+        minify: true,
+        includeLargeDiagrams: false,
+        metafile: shouldVisualize,
+        format: 'iife',
+      })
+    );
+    if (metafile) {
+      await writeFile(`stats/meta-${entryName}-tiny.json`, JSON.stringify(metafile));
+    }
+  }
 };
 
 const handler = (e) => {

.esbuild/util.ts

@@ -14,6 +14,7 @@ interface MermaidBuildOptions {
   metafile?: boolean;
   format?: 'esm' | 'iife';
   entryName: keyof typeof packageOptions;
+  includeLargeDiagrams?: boolean;
 }
 
 const buildOptions = (override: BuildOptions): BuildOptions => {
@@ -37,7 +38,8 @@ export const getBuildConfig = ({
   core,
   entryName,
   metafile,
-  format,
+  format = 'esm',
+  includeLargeDiagrams = true,
 }: MermaidBuildOptions): BuildOptions => {
   const external: string[] = ['require', 'fs', 'path'];
   const { name, file, packageName } = packageOptions[entryName];
@@ -45,11 +47,15 @@ export const getBuildConfig = ({
     absWorkingDir: resolve(__dirname, `../packages/${packageName}`),
     entryPoints: {
       [`${name}${core ? '.core' : format === 'iife' ? '' : '.esm'}${
-        minify ? '.min' : ''
+        includeLargeDiagrams ? '' : '.tiny'
-      }`]: `src/${file}`,
+      }${minify ? '.min' : ''}`]: `src/${file}`,
     },
     metafile,
     logLevel: 'info',
+    define: {
+      // This needs to be stringified for esbuild
+      includeLargeDiagrams: `${includeLargeDiagrams}`,
+    },
   });
 
   if (core) {

packages/mermaid/src/diagrams/error/errorDiagram.ts

@@ -1,7 +1,7 @@
 import type { DiagramDefinition } from '../../diagram-api/types.js';
 import { renderer } from './errorRenderer.js';
 
-const diagram: DiagramDefinition = {
+export const diagram: DiagramDefinition = {
   db: {},
   renderer,
   parser: {

packages/mermaid/src/diagrams/flowchart/elk/detector.ts

@@ -19,7 +19,9 @@ const detector: DiagramDetector = (txt, config): boolean => {
 };
 
 const loader: DiagramLoader = async () => {
-  const { diagram } = await import('./flowchart-elk-definition.js');
+  const { diagram } = includeLargeDiagrams
+    ? await import('./flowchart-elk-definition.js')
+    : await import('../../error/errorDiagram.js');
   return { id, diagram };
 };
 

packages/mermaid/src/diagrams/mindmap/detector.ts

@@ -10,7 +10,9 @@ const detector: DiagramDetector = (txt) => {
 };
 
 const loader: DiagramLoader = async () => {
-  const { diagram } = await import('./mindmap-definition.js');
+  const { diagram } = includeLargeDiagrams
+    ? await import('./mindmap-definition.js')
+    : await import('../error/errorDiagram.js');
   return { id, diagram };
 };
 

packages/mermaid/src/types.d.ts

@@ -0,0 +1 @@
+declare let includeLargeDiagrams: boolean;