Fix AC code export for 5-digit question IDs and UpdateVersion workflow infinite recursion

[Copilot]

AC code export fails for questions with IDs ≥10000 due to hardcoded 4-digit extraction at positions 7-11. Additionally, fixes the UpdateVersion GitHub Action workflow that was creating an infinite loop of commits.

Changes

1. AC Code Export Fix (XMOJ.user.js)

Replaced fixed-position substring extraction with dynamic parsing:

Before:

let CurrentQuestionID = CurrentCode.substring(7, 11);  // Always extracts 4 chars
CurrentCode = CurrentCode.substring(14);

After:

let lineBreakPos = CurrentCode.search(/[\r\n]/);
if (lineBreakPos === -1) continue;
let headerLine = CurrentCode.slice(0, lineBreakPos);
let digitMatch = headerLine.match(/\d+/);
if (!digitMatch) continue;
let CurrentQuestionID = digitMatch[0];  // Extracts variable-length ID
let newlinePos = CurrentCode.indexOf('\n');
CurrentCode = CurrentCode.slice(newlinePos + 1);

Handles question IDs of any length. Adds validation to skip malformed entries.

2. UpdateVersion Workflow Fix (.github/workflows/UpdateVersion.yml)

Fixed infinite recursion caused by the workflow triggering itself:

Added condition:

if: github.event.pull_request.head.repo.full_name == github.repository && github.actor != 'github-actions[bot]'

This prevents the workflow from running when commits are made by github-actions[bot], breaking the infinite loop that was creating hundreds of duplicate commits.

Original prompt

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This section details on the original issue you should resolve

<issue_title>[Bug] 导出AC代码功能只有1000-9999的代码，无法导出10000以上的代码</issue_title>
<issue_description>### 检查项

• 我已确认了XMOJ增强脚本已为最新版，且最新版未修复这个 Bug 。
• 我已在 Issues 页面 中搜索，确认了这一 Bug 未被提交过。

描述

今天导出AC代码的时候发现1打头部分和9937(四位数题号中我AC的题号最大一道题)后面都没有五位数题号，但是在个人中心页面显示我AC过五道五位数题号的题目。点进去检查后确认这五道题已经在xmoj上AC过并且代码是正确的。

重现步骤

0.确保AC过一道以上题号10000+的题目
1.导出AC代码
2.查找压缩包中大于9999.cpp的题号，发现没有

控制台错误信息

No response</issue_description>

<agent_instructions>第300行左右的地方有bug，导出的AC代码是硬编码四位数，但是题号已经到了五位数 let CurrentQuestionID = CurrentCode.substring(7, 11); CurrentCode = CurrentCode.substring(14);</agent_instructions>

Comments on the Issue (you are @copilot in this section)

@boomzero 好的，~~竟然还有人用这个~~ @boomzero btw, 我们决定给提issue的人write权限

• Fixes [Bug] 导出AC代码功能只有1000-9999的代码，无法导出10000以上的代码 #887

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Summary by cubic

Fixes the export bug that skipped AC code for problems with IDs above 9999. The exporter now handles variable-length IDs so five-digit problems are included in the ZIP.

• Bug Fixes
  • Removed 4-digit hardcoding when parsing question IDs; use flexible ID extraction instead of fixed substrings.
  • Added validation to skip malformed entries and support for both \r\n and \n line endings.
  • Updated filename generation and filtering to correctly handle IDs >= 10000.
  • Prevented UpdateVersion workflow loops by skipping runs on bot commits for same-repo PRs.

^{Written for commit 83609ec. Summary will update on new commits.}

[cubic-dev-ai]

No issues found across 1 file

[PythonSmall-Q]

@boomzero REVIEW

[boomzero]

Though pls fix CI inf recursion

[PythonSmall-Q]

@copilot please fix the problem of the updateversion github action flow recuring nonstop

[Copilot]

@copilot please fix the problem of the updateversion github action flow recuring nonstop

Fixed in commit 83609ec. Added a condition to the UpdateVersion workflow to skip execution when the actor is github-actions[bot], which prevents the bot's commits from triggering the workflow recursively.