fix: make CJK font conditional and locale-aware
Address code review feedback from cubic-dev-ai: P1: Unconditionally passing CJKmainfont broke non-CJK conversions in environments without CJK fonts. Now the source file is scanned for CJK characters and the font argument is only added when CJK content is detected. P2: Hardcoded Noto Sans CJK SC only covers Simplified Chinese. Now detects the specific CJK language (Japanese Kana, Korean Hangul, or Chinese Hanzi) and selects the appropriate font variant (JP/KR/SC). Changes: - Add detectCJKFont() that reads the source file and returns the correct Noto Sans CJK variant, or null for non-CJK content - CJK font argument is only added when detectCJKFont returns non-null - Detection order: Japanese (Kana) > Korean (Hangul) > Chinese (Hanzi) since Japanese also uses Kanji shared with Chinese - Graceful fallback: if file can't be read, no CJK font is added - Update tests to use temp files with real CJK content (11 tests total)
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Ryo
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2 changed files with 157 additions and 20 deletions
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@ -1,9 +1,34 @@
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import { beforeEach, expect, test, describe } from "bun:test";
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import { beforeEach, expect, test, describe, afterEach } from "bun:test";
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import { convert } from "../../src/converters/pandoc";
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import type { ExecFileFn } from "../../src/converters/types";
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import { writeFileSync, unlinkSync } from "node:fs";
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import { join } from "node:path";
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import { tmpdir } from "node:os";
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describe("convert", () => {
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let mockExecFile: ExecFileFn;
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let tempFiles: string[] = [];
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afterEach(() => {
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for (const f of tempFiles) {
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try {
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unlinkSync(f);
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} catch {
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/* ignore */
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}
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}
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tempFiles = [];
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});
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function makeTempFile(content: string, ext = "md"): string {
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const path = join(
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tmpdir(),
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`pandoc-test-${Date.now()}-${Math.random().toString(36).slice(2)}.${ext}`,
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);
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writeFileSync(path, content, "utf-8");
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tempFiles.push(path);
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return path;
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}
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beforeEach(() => {
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mockExecFile = (cmd, args, callback) => callback(null, "output-data", "");
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@ -45,10 +70,11 @@ describe("convert", () => {
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callback(null, "output-data", "");
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};
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await convert("input.md", "markdown", "pdf", "output.pdf", undefined, mockExecFile);
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const filePath = makeTempFile("# Hello World\n");
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await convert(filePath, "markdown", "pdf", "output.pdf", undefined, mockExecFile);
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expect(calledArgs[1][0]).toBe("--pdf-engine=xelatex");
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expect(calledArgs[1]).toContain("input.md");
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expect(calledArgs[1]).toContain(filePath);
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expect(calledArgs[1]).toContain("-f");
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expect(calledArgs[1]).toContain("markdown");
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expect(calledArgs[1]).toContain("-t");
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@ -57,33 +83,85 @@ describe("convert", () => {
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expect(calledArgs[1]).toContain("output.pdf");
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});
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test("should add CJK mainfont argument for pdf output", async () => {
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test("should not add CJK mainfont for non-CJK content", async () => {
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let calledArgs: Parameters<ExecFileFn> = ["", [], () => {}];
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mockExecFile = (cmd, args, callback) => {
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calledArgs = [cmd, args, callback];
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callback(null, "output-data", "");
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};
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await convert("input.md", "markdown", "pdf", "output.pdf", undefined, mockExecFile);
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const filePath = makeTempFile("# Hello World\nThis is English text.\n");
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await convert(filePath, "markdown", "pdf", "output.pdf", undefined, mockExecFile);
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const cjkFontIndex = calledArgs[1].indexOf("-V");
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expect(cjkFontIndex).toBeGreaterThan(-1);
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expect(calledArgs[1][cjkFontIndex + 1]).toBe("CJKmainfont=Noto Sans CJK SC");
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expect(calledArgs[1].some((arg) => arg.startsWith("CJKmainfont"))).toBe(false);
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});
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test("should add CJK mainfont argument for latex output", async () => {
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test("should add CJKmainfont=SC for Chinese content", async () => {
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let calledArgs: Parameters<ExecFileFn> = ["", [], () => {}];
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mockExecFile = (cmd, args, callback) => {
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calledArgs = [cmd, args, callback];
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callback(null, "output-data", "");
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};
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await convert("input.md", "markdown", "latex", "output.tex", undefined, mockExecFile);
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const filePath = makeTempFile("# 中文标题\n这是一段中文内容。\n");
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await convert(filePath, "markdown", "pdf", "output.pdf", undefined, mockExecFile);
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expect(calledArgs[1].some((arg) => arg === "CJKmainfont=Noto Sans CJK SC")).toBe(true);
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});
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test("should add CJKmainfont=JP for Japanese content", async () => {
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let calledArgs: Parameters<ExecFileFn> = ["", [], () => {}];
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mockExecFile = (cmd, args, callback) => {
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calledArgs = [cmd, args, callback];
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callback(null, "output-data", "");
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};
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const filePath = makeTempFile("# 日本語タイトル\nこれは日本語の内容です。\n");
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await convert(filePath, "markdown", "pdf", "output.pdf", undefined, mockExecFile);
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expect(calledArgs[1].some((arg) => arg === "CJKmainfont=Noto Sans CJK JP")).toBe(true);
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});
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test("should add CJKmainfont=KR for Korean content", async () => {
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let calledArgs: Parameters<ExecFileFn> = ["", [], () => {}];
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mockExecFile = (cmd, args, callback) => {
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calledArgs = [cmd, args, callback];
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callback(null, "output-data", "");
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};
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const filePath = makeTempFile("# 한국어 제목\n이것은 한국어 내용입니다.\n");
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await convert(filePath, "markdown", "pdf", "output.pdf", undefined, mockExecFile);
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expect(calledArgs[1].some((arg) => arg === "CJKmainfont=Noto Sans CJK KR")).toBe(true);
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});
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test("should prefer Japanese font when both Kanji and Kana present", async () => {
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let calledArgs: Parameters<ExecFileFn> = ["", [], () => {}];
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mockExecFile = (cmd, args, callback) => {
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calledArgs = [cmd, args, callback];
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callback(null, "output-data", "");
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};
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// Japanese text with both Kanji and Hiragana
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const filePath = makeTempFile("# 日本語のテスト\nこれは漢字とひらがなの文章です。\n");
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await convert(filePath, "markdown", "pdf", "output.pdf", undefined, mockExecFile);
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expect(calledArgs[1].some((arg) => arg === "CJKmainfont=Noto Sans CJK JP")).toBe(true);
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expect(calledArgs[1].some((arg) => arg === "CJKmainfont=Noto Sans CJK SC")).toBe(false);
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});
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test("should not add CJK mainfont for latex when content is non-CJK", async () => {
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let calledArgs: Parameters<ExecFileFn> = ["", [], () => {}];
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mockExecFile = (cmd, args, callback) => {
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calledArgs = [cmd, args, callback];
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callback(null, "output-data", "");
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};
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const filePath = makeTempFile("# English Title\nSome text.\n");
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await convert(filePath, "markdown", "latex", "output.tex", undefined, mockExecFile);
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expect(calledArgs[1][0]).toBe("--pdf-engine=xelatex");
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const cjkFontIndex = calledArgs[1].indexOf("-V");
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expect(cjkFontIndex).toBeGreaterThan(-1);
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expect(calledArgs[1][cjkFontIndex + 1]).toBe("CJKmainfont=Noto Sans CJK SC");
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expect(calledArgs[1].some((arg) => arg.startsWith("CJKmainfont"))).toBe(false);
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});
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test("should not add CJK mainfont for non-pdf/latex output", async () => {
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@ -93,15 +171,31 @@ describe("convert", () => {
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callback(null, "output-data", "");
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};
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await convert("input.md", "markdown", "html", "output.html", undefined, mockExecFile);
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const filePath = makeTempFile("# 中文标题\n");
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await convert(filePath, "markdown", "html", "output.html", undefined, mockExecFile);
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expect(calledArgs[1].some((arg) => arg.startsWith("CJKmainfont"))).toBe(false);
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});
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test("should handle unreadable file gracefully without CJK font", async () => {
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let calledArgs: Parameters<ExecFileFn> = ["", [], () => {}];
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mockExecFile = (cmd, args, callback) => {
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calledArgs = [cmd, args, callback];
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callback(null, "output-data", "");
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};
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// Use a non-existent file path
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await convert("/nonexistent/file.md", "markdown", "pdf", "output.pdf", undefined, mockExecFile);
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expect(calledArgs[1][0]).toBe("--pdf-engine=xelatex");
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expect(calledArgs[1].some((arg) => arg.startsWith("CJKmainfont"))).toBe(false);
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});
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test("should reject if execFile returns an error", async () => {
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const filePath = makeTempFile("# Test\n");
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mockExecFile = (cmd, args, callback) => callback(new Error("fail"), "", "");
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await expect(
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convert("input.md", "markdown", "html", "output.html", undefined, mockExecFile),
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convert(filePath, "markdown", "html", "output.html", undefined, mockExecFile),
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).rejects.toMatch(/error: Error: fail/);
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});
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});
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