Copilot commented on code in PR #497:
URL: https://github.com/apache/echarts-doc/pull/497#discussion_r3035187026
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build/build-llms.js:
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@@ -0,0 +1,366 @@
+/**
+ * Converts built part JSONs (HTML desc) to Markdown using turndown,
+ * and generates llms.txt + individual .md files.
+ *
+ * Mechanically converts documents/*-parts/*.json to llms-documents/ (.md
files).
+ * Root files (e.g. option.md) are placed at llms-documents/, while part files
+ * (e.g. option.title.md) are placed at llms-documents/*-parts/.
+ * Type information is extracted from documents/*.json (full schema) via
traverse.
+ *
+ * Prerequisites: JSON must be built first (node build.js --env dev)
+ * Usage: node build/build-llms.js --env dev
+ */
+const fs = require('fs');
+const fse = require('fs-extra');
+const path = require('path');
+const globby = require('globby');
+const TurndownService = require('turndown');
+const {gfm} = require('turndown-plugin-gfm');
+const {traverse} = require('../tool/schemaHelper');
+const {readConfigEnvFile} = require('./helper');
+
+// --- Constants ---
+
+const LANGUAGES = ['en', 'zh'];
+const OUTPUT_DIR_NAME = 'llms-documents';
+const MAX_HEADING_DEPTH = 6;
+
+const SECTION_LABELS = {
+ en: {'option-parts': 'Option', 'option-gl-parts': 'Option GL',
'api-parts': 'API', 'tutorial-parts': 'Tutorial'},
+ zh: {'option-parts': '配置项 (Option)', 'option-gl-parts': 'Option GL',
'api-parts': 'API', 'tutorial-parts': '教程 (Tutorial)'}
+};
+
+const LLMS_TXT_HEADER = [
+ '# Apache ECharts Documentation',
+ '',
+ '> Apache ECharts is a free, powerful charting and visualization library
offering easy ways to add intuitive, interactive, and highly customizable
charts to your commercial products.',
+ ''
+].join('\n');
+
+// --- Config ---
+
+const argv = require('yargs').argv;
+const envType = (argv.dev != null || argv.debug != null || argv.env === 'dev')
? 'dev' : argv.env;
+if (!envType) throw new Error('--env MUST be specified');
+const config = readConfigEnvFile(envType);
+
+// --- Turndown ---
+
+const td = new TurndownService({headingStyle: 'atx', codeBlockStyle:
'fenced'});
+td.use(gfm);
+td.addRule('iframe', {filter: 'iframe', replacement: () => ''});
+
+function htmlToMd(html) {
+ return html ? td.turndown(html).replace(/\n{3,}/g, '\n\n').trim() : '';
+}
+
+// --- Extract type info from full schema JSON ---
+
+/**
+ * Extract type and default value info from a full schema JSON by traversing
+ * the nested schema tree.
+ *
+ * @param {string} schemaJsonPath - path to schema JSON (e.g.
"documents/option.json")
+ * @param {string} docName - e.g. "option", "api"
+ * @returns {Object<string, {type: string|null, default: string|null}>}
+ * e.g. { "option.title.show": {type: "boolean", default: "true"} }
+ */
+function buildTypeMap(schemaJsonPath, docName) {
+ if (!fs.existsSync(schemaJsonPath)) return {};
+ const schema = JSON.parse(fs.readFileSync(schemaJsonPath, 'utf-8'));
+ const typeMap = {};
+ traverse(schema, docName, (schemaPath, node) => {
+ if (node.type || node.default != null) {
+ typeMap[schemaPath] = {
+ type: node.type ? (Array.isArray(node.type) ?
node.type.join('|') : node.type) : null,
+ default: node.default != null
+ ? (typeof node.default === 'object' ?
JSON.stringify(node.default) : String(node.default))
+ : null
+ };
+ }
+ });
+ return typeMap;
+}
+
+// --- Resolve links in HTML ---
+// Best-effort rewriting of <a href="#path"> and <a href="api.html#path"> in
HTML
+// so that turndown produces markdown links pointing to the correct .md files.
+// Some source links have non-standard formats (e.g. missing "#", no dot
separator)
+// that cannot be resolved; these are left as-is or linked to the root file.
+
+/**
+ * Split linkPath into a part key (first segment) and fragment (rest), matching
+ * the key against partKeys with case-insensitive and singular/plural fallback.
+ *
+ * @param {string} linkPath - e.g. "title.show", "echarts.init"
+ * @param {Set<string>} partKeys - e.g. Set{'title','series-bar','geo',...}
+ * @returns {{key: string, frag: string|null}|null}
+ * e.g. "title.show" -> {key: "title", frag: "show"}
+ * "angleAxis.axisLabel.interval" -> {key: "angleAxis", frag:
"axisLabel.interval"}
+ * "geo" -> {key: "geo", frag: null}
+ * "unknown" -> null
+ */
+function tryResolvePartKey(linkPath, partKeys) {
+ const [seg, ...rest] = linkPath.split('.');
+ const frag = rest.length > 0 ? rest.join('.') : null;
+
+ if (partKeys.has(seg)) return {key: seg, frag};
+
+ // Fallback: case-insensitive and singular/plural matching
+ const segL = seg.toLowerCase();
+ for (const k of partKeys) {
+ if (k.toLowerCase() === segL) return {key: k, frag};
+ }
+ for (const k of partKeys) {
+ const kl = k.toLowerCase();
+ if (kl === segL + 's' || kl + 's' === segL) return {key: k, frag};
+ }
+ return null;
+}
+
+/**
+ * Resolve a link path to an href pointing to the correct .md file.
+ * If partKeys contains a match, link to the individual part file;
+ * otherwise fall back to the root file.
+ *
+ * @param {string} linkPath - e.g. "title.show", "visualMap"
+ * @param {Set<string>} partKeys - keys of individual part files
+ * @param {string} pathPrefix - path prefix for part files
+ * from part: "option" -> "option.title.md"
+ * from root: "option-parts/option" -> "option-parts/option.title.md"
+ * cross-doc: "../api-parts/api" -> "../api-parts/api.echarts.md"
+ * @param {string} rootPath - path prefix for root file fallback
+ * from part: "../option" -> "../option.md#visualMap"
+ * from root: "option" -> "option.md#visualMap"
+ * cross-doc: "../api" -> "../api.md#events"
+ * @returns {string} resolved href attribute string
+ */
+function resolveLink(linkPath, partKeys, pathPrefix, rootPath) {
+ const resolved = tryResolvePartKey(linkPath, partKeys);
+ if (!resolved) {
+ return `href="${rootPath}.md#${linkPath}"`;
+ }
+ return `href="${pathPrefix}.${resolved.key}.md${resolved.frag ? '#' +
resolved.frag : ''}"`;
+}
+
+/**
+ * Rewrite internal links and image paths in HTML before turndown conversion.
+ * Handles three patterns:
+ * 1. Same-doc: href="#title.show" -> href="option.title.md#show"
+ * 2. Cross-doc: href="api.html#echarts.init" ->
href="../api-parts/api.echarts.md#init"
+ * 3. Images: src="documents/asset/img/..." ->
src="../../documents/asset/img/..."
+ * Unresolvable links fall back to the root file.
+ *
+ * @param {string} html - HTML string containing <a href="..."> links
+ * @param {Object<string, Set<string>>} partKeysByDoc - part keys for all docs
+ * @param {string} docName - current doc name (e.g. "option")
+ * @param {boolean} isRoot - whether the current file is a root file
+ * @returns {string} HTML with rewritten href attributes and image paths
+ */
+function tryResolveHtmlLinks(html, partKeysByDoc, docName, isRoot) {
+ const partKeys = partKeysByDoc[docName];
+ // Path prefixes differ depending on whether current file is root or part:
+ // root (llms-documents/option.md) -> part:
"option-parts/option", root: "option"
+ // part (llms-documents/option-parts/option.*.md) -> part: "option",
root: "../option"
+ const sameDocPartPrefix = isRoot ? `${docName}-parts/${docName}` : docName;
+ const sameDocRootPath = isRoot ? docName : `../${docName}`;
+ const crossDocPrefix = isRoot ? '' : '../';
+
+ // Same-doc links: href="#title.show" -> href="option.title.md#show"
+ const resolved = html.replace(/href="#([^"]+)"/g, (match, linkPath) =>
+ partKeys ? resolveLink(linkPath, partKeys, sameDocPartPrefix,
sameDocRootPath) : match
+ );
+
+ // Cross-doc links: href="api.html#echarts.init" ->
href="../api-parts/api.echarts.md#init"
+ const crossResolved = resolved.replace(
+ /href="(option-gl|option|api|tutorial)\.html#([^"]+)"/g,
+ (match, targetDoc, fragment) => {
+ const keys = partKeysByDoc[targetDoc];
+ if (!keys) return match;
+ return resolveLink(fragment, keys,
`${crossDocPrefix}${targetDoc}-parts/${targetDoc}`,
`${crossDocPrefix}${targetDoc}`);
+ }
+ );
+
+ // Image paths: src="documents/asset/..." -> relative path to
public/{lang}/documents/asset/
+ const imgPrefix = isRoot ? '../' : '../../';
+ return crossResolved.replace(
+ /src="(documents\/asset\/[^"]*)"/g,
+ (_, src) => `src="${imgPrefix}${src}"`
+ );
+}
+
+// --- Convert part JSON to Markdown ---
+
+function formatPropertyEntry(key, entry, typeInfo, linkResolver) {
+ const heading = '#'.repeat(Math.min(key.split('.').length + 1,
MAX_HEADING_DEPTH)) + ' ' + key;
+ const meta = [
+ typeInfo && typeInfo.type && `- **Type**: \`${typeInfo.type}\``,
+ typeInfo && typeInfo.default != null && `- **Default**:
\`${typeInfo.default}\``
Review Comment:
When rendering metadata, `typeInfo.default != null` will suppress a captured
default value of `null`. If you change default-capture to include null, also
update this check to test for presence (e.g. `'default' in typeInfo`) so the
output includes `- **Default**: `null`` when appropriate.
```suggestion
typeInfo && Object.prototype.hasOwnProperty.call(typeInfo,
'default') && `- **Default**: \`${typeInfo.default}\``
```
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