2024-06-26 23:18:47 +00:00
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import type { RootContent } from "hast";
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2023-10-11 16:48:34 +00:00
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import { fromMarkdown } from "mdast-util-from-markdown";
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2023-10-11 17:47:18 +00:00
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import { fromHtml } from "hast-util-from-html";
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import { toHtml } from "hast-util-to-html";
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2023-10-11 16:48:34 +00:00
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import { spawnSync } from "node:child_process";
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2024-06-27 05:22:46 +00:00
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import {
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mkdirSync,
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mkdtempSync,
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readFileSync,
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2024-06-29 01:48:21 +00:00
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existsSync,
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2024-06-27 05:22:46 +00:00
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readdirSync,
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copyFileSync,
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writeFileSync,
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} from "node:fs";
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2023-10-11 16:48:34 +00:00
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import { tmpdir } from "node:os";
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2024-09-18 21:22:37 +00:00
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import { join, parse, resolve, basename } from "node:path";
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2023-10-11 17:47:18 +00:00
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import { visit } from "unist-util-visit";
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2024-06-27 05:22:46 +00:00
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import type { RemarkPlugin } from "@astrojs/markdown-remark";
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interface Options {
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base: string;
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outDir: string;
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publicDir: string;
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}
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const remarkAgda: RemarkPlugin = ({ base, publicDir }: Options) => {
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const destDir = join(publicDir, "generated", "agda");
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mkdirSync(destDir, { recursive: true });
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2023-10-11 16:48:34 +00:00
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2024-04-05 15:34:32 +00:00
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return (tree, { history }) => {
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2024-06-26 23:18:47 +00:00
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const path: string = history[history.length - 1]!;
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2023-10-11 16:48:34 +00:00
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if (!(path.endsWith(".lagda.md") || path.endsWith(".agda"))) return;
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2024-11-27 22:38:34 +00:00
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// console.log("AGDA:processing path", path);
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2024-06-26 23:18:47 +00:00
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2023-10-11 16:48:34 +00:00
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const tempDir = mkdtempSync(join(tmpdir(), "agdaRender."));
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2024-06-27 05:22:46 +00:00
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const agdaOutDir = join(tempDir, "output");
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mkdirSync(agdaOutDir, { recursive: true });
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2023-10-11 16:48:34 +00:00
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const childOutput = spawnSync(
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"agda",
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2024-04-05 15:34:32 +00:00
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[
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"--html",
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2024-06-27 05:22:46 +00:00
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`--html-dir=${agdaOutDir}`,
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2024-04-05 15:34:32 +00:00
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"--highlight-occurrences",
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"--html-highlight=code",
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path,
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],
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2023-10-11 16:48:34 +00:00
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{},
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);
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2024-09-16 00:38:05 +00:00
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// Locate output file
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const directory = readdirSync(agdaOutDir);
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const outputFilename = directory.find((name) => name.endsWith(".md"));
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if (childOutput.status !== 0 || outputFilename === undefined) {
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2024-06-29 01:48:21 +00:00
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throw new Error(
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2024-09-16 00:38:05 +00:00
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`Agda output:
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2024-06-29 01:48:21 +00:00
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Stdout:
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${childOutput.stdout}
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Stderr:
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2024-09-16 00:38:05 +00:00
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${childOutput.stderr}
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`,
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{
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cause: childOutput.error,
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},
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);
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}
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2024-09-16 00:38:05 +00:00
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const outputFile = join(agdaOutDir, outputFilename);
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2024-06-29 01:48:21 +00:00
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// // TODO: Handle child output
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// console.error("--AGDA OUTPUT--");
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// console.error(childOutput);
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// console.error(childOutput.stdout?.toString());
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// console.error(childOutput.stderr?.toString());
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// console.error("--AGDA OUTPUT--");
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2024-06-27 05:22:46 +00:00
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const referencedFiles = new Set();
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for (const file of readdirSync(agdaOutDir)) {
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referencedFiles.add(file);
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const fullPath = join(agdaOutDir, file);
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const fullDestPath = join(destDir, file);
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if (file.endsWith(".html")) {
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const src = readFileSync(fullPath);
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writeFileSync(
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fullDestPath,
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`
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<!DOCTYPE html>
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<html>
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<head>
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<link rel="stylesheet" href="${base}generated/agda/Agda.css" />
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</head>
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<body>
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<pre class="Agda">
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${src}
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</pre>
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</body>
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</html>
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`,
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);
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} else {
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copyFileSync(fullPath, fullDestPath);
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}
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}
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2024-06-27 00:17:01 +00:00
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2024-11-27 22:38:34 +00:00
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const htmlname = basename(resolve(outputFile)).replace(/(\.lagda)?\.md/, ".html");
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2023-10-11 16:48:34 +00:00
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2024-09-16 00:38:05 +00:00
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const doc = readFileSync(outputFile);
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2024-06-26 23:18:47 +00:00
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// This is the post-processed markdown with HTML code blocks replacing the Agda code blocks
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const tree2 = fromMarkdown(doc);
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2023-10-11 17:47:18 +00:00
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const collectedCodeBlocks: RootContent[] = [];
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visit(tree2, "html", (node) => {
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const html = fromHtml(node.value, { fragment: true });
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2023-10-11 16:48:34 +00:00
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2023-10-11 17:47:18 +00:00
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const firstChild: RootContent = html.children[0]!;
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visit(html, "element", (node) => {
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if (node.tagName !== "a") return;
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2024-06-27 05:22:46 +00:00
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if (node.properties.href) {
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// Trim off end
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const [href, hash, ...rest] = node.properties.href.split("#");
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if (rest.length > 0) throw new Error("come look at this");
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2024-09-18 21:22:37 +00:00
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if (href === htmlname) {
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node.properties.href = `#${hash}`;
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}
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2024-06-27 05:22:46 +00:00
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if (referencedFiles.has(href)) {
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node.properties.href = `${base}generated/agda/${href}${hash ? `#${hash}` : ""}`;
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node.properties.target = "_blank";
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}
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2023-10-11 17:47:18 +00:00
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}
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});
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if (!firstChild?.properties?.className?.includes("Agda")) return;
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const stringContents = toHtml(firstChild);
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collectedCodeBlocks.push({
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contents: stringContents,
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});
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});
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let idx = 0;
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2024-09-18 09:47:52 +00:00
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try {
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visit(tree, "code", (node) => {
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if (!(node.lang === null || node.lang === "agda")) return;
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2023-10-11 17:47:18 +00:00
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2024-09-18 09:47:52 +00:00
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if (idx > collectedCodeBlocks.length) {
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throw new Error("failed");
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}
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node.type = "html";
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node.value = collectedCodeBlocks[idx].contents;
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idx += 1;
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});
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} catch (e) {
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2024-09-18 11:01:37 +00:00
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// TODO: Figure out a way to handle this correctly
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// Possibly by diffing?
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2024-11-27 22:38:34 +00:00
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console.log("Mismatch in number of args. Perhaps there was an empty block?");
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2024-09-18 09:47:52 +00:00
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}
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};
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};
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export default remarkAgda;
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