Changelog automation fixes

[amyblais]

Fix an issue where the changelog automation didn't work properly. The milestones API only returns 100 results per page, and mattermost/mattermost has been active since 2015 — it has hundreds of milestones. The script is only fetching the first page (the oldest ones), so v11.7.0 is never seen. The fix is to paginate through all milestone pages, and sort descending so recent milestones come first.

The fix:

• Paginates through all milestone pages until it finds a match.
• Sorts descending so the most recent milestones come first — for a repo like this, v11.7.0 will almost certainly be found on page 1 now, making it fast.
• The "available milestones" debug line now shows the most recent ones instead of the oldest, which is much more useful if there's ever a name mismatch.

[Copilot]

Pull request overview

This PR fixes changelog generation automation by updating the GitHub milestones lookup to handle repositories with more than 100 milestones, ensuring the target milestone (e.g., v11.7.0) can be found reliably.

Changes:

• Paginate through all milestone pages until the requested milestone title is found (or no more pages remain).
• Request milestones in descending order to bias results toward newer milestones for faster matches.
• Improve the “available milestones” debug output to show the most recent milestone titles from page 1.

[github-actions]

Newest code from mattermost has been published to preview environment for Git SHA c5d3b92

[coderabbitai]

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 0acd6b4a-71f5-4f98-ad2a-692856a4b270

📥 Commits

Reviewing files that changed from the base of the PR and between c5d3b92 and e7d7c25.

📒 Files selected for processing (1)

• .github/scripts/generate_changelog.py

📝 Walkthrough

Walkthrough

The get_milestone_number() function in the changelog generation script now paginates through all GitHub milestones in batches of 100 instead of requesting only the first page. When a requested milestone title is not found after checking all pages, the function prints the most recent milestone titles captured from the first page, rather than an "available milestones" list.

Changes

GitHub Changelog Script Enhancement

Layer / File(s)	Summary
Milestone Pagination Logic .github/scripts/generate_changelog.py	Function introduces a pagination loop to iterate through all GitHub milestones (100 per page) until exhausted. Error reporting changes from "Available milestones" (single response) to "Most recent milestones" (first page). Returns milestone number when found, or None otherwise.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title 'Changelog automation fixes' directly addresses the main change—fixing the changelog automation script's pagination issue with GitHub milestones.
Description check	✅ Passed	The description comprehensively explains the changelog automation issue, the specific problem with pagination, and the implemented fixes related to the changeset.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch amyblais-changelogfix2

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[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In @.github/scripts/generate_changelog.py:
- Around line 91-92: The requests.get calls that assign to resp (the call "resp
= requests.get(url, headers=HEADERS, params=params)" and the similar call later)
must include an explicit timeout to avoid hanging; update both calls to pass
timeout=30 (i.e., requests.get(..., timeout=30, ...)) so network requests fail
fast on unresponsive API endpoints, leaving the rest of the parameters
(headers/params) unchanged.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: e9dabe30-daa1-4eac-b34a-2b64c72df18f

📥 Commits

Reviewing files that changed from the base of the PR and between 03d7946 and c5d3b92.

📒 Files selected for processing (1)

• .github/scripts/generate_changelog.py

[github-actions]

Newest code from mattermost has been published to preview environment for Git SHA e7d7c25