[FEATURE] Detect SemVer changes in `appveyor.yml` and recommend build number reset

[guibranco]

Description

We need to implement a feature that parses pull request content to detect if the version specified in the appveyor.yml file has changed. If a change is detected, the system should recommend running a command to reset the build number, ensuring accurate versioning and build consistency.

Problem Statement

• Current Issue: There is no automated mechanism to check for changes in the version number within appveyor.yml in pull requests. This can result in inconsistent build numbers and versioning issues.
• Impact: Detecting version changes and suggesting a build number reset will help maintain proper versioning and avoid conflicts or confusion regarding build numbers.

Proposed Solution

• Parse Pull Request Content:

  • Develop a script or tool that uses the GitHub REST API to analyze the changes in the pull request, specifically focusing on the appveyor.yml file.
  • Check if the version number in appveyor.yml has been modified.

• Recommend Build Number Reset:

  • If a version change is detected, automatically suggest the command to reset the build number. This can be provided as a comment on the pull request.

Implementation Steps

1. Fetch Pull Request Details:

   • Use the GitHub REST API to fetch the content of the pull request and the changes made to appveyor.yml.

   $repoOwner = 'your-repo-owner';
   $repoName = 'your-repo-name';
   $pullRequestNumber = 'your-pr-number';
   $token = 'your-github-token';
   
   $url = "https://api.github.com/repos/$repoOwner/$repoName/pulls/$pullRequestNumber/files";
   $options = [
      "http" => [
          "header" => "Authorization: token $token\r\nUser-Agent: YourApp\r\n",
          "method" => "GET",
      ],
   ];
   $context = stream_context_create($options);
   $response = file_get_contents($url, false, $context);
   $files = json_decode($response, true);

2. Check for Version Changes:

   • Parse the response to identify changes to appveyor.yml and compare the old and new version numbers.

   foreach ($files as $file) {
      if ($file['filename'] === 'appveyor.yml') {
          $patch = $file['patch'];
          // Parse the patch to check for version changes
          if (strpos($patch, 'version:') !== false) {
              // Extract the old and new version numbers
              // Implement your logic to determine if the version has changed
              $versionChanged = true; // Example condition
              if ($versionChanged) {
                  // Recommend resetting the build number
                  $comment = "The version number in `appveyor.yml` has been updated. It is recommended to run the following command to reset the build number:\n\n```bash\nappveyor build restart --build-number <new-build-number>\n```";
                  // Post a comment on the pull request
                  postComment($repoOwner, $repoName, $pullRequestNumber, $comment, $token);
              }
          }
      }
   }
   
   function postComment($owner, $repo, $prNumber, $comment, $token) {
      $url = "https://api.github.com/repos/$owner/$repo/issues/$prNumber/comments";
      $data = json_encode(['body' => $comment]);
      $options = [
          "http" => [
              "header" => "Authorization: token $token\r\nContent-Type: application/json\r\nUser-Agent: YourApp\r\n",
              "method" => "POST",
              "content" => $data,
          ],
      ];
      $context = stream_context_create($options);
      file_get_contents($url, false, $context);
   }

3. Testing:

   • Test the script to ensure it accurately detects version changes and posts appropriate recommendations.

4. Documentation:

   • Document the new feature, including instructions on how to use it and any configuration required.

Additional Notes

• Security: Handle the GitHub token securely and ensure it is not exposed in the code repository.
• Integration: Consider integrating this feature with existing CI/CD pipelines or GitHub Actions for automated checks.

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