Auto-apply milestone labels to the mono/skia sync PR too (#4317)

[mattleibow]

Follow-up to #4327 (which handled the mono/SkiaSharp PR). Also part of #4317.

The skia-sync workflow opens a companion PR in mono/skia (the push_skia() function in .github/scripts/skia-sync-push-prs.sh), in addition to the mono/SkiaSharp PR. This applies the same labeling there.

Workflow change

• Every skia-sync PR (both repos) gets type/milestone-sync.
• Milestone-number bumps additionally get type/milestone-bump. On the mono/skia side, "bump" means the merge advances SK_MILESTONE in include/core/SkMilestone.h (the analog of scripts/VERSIONS.txt on the parent).
• Renamed the shared flag SS_IS_MILESTONE_BUMP → IS_MILESTONE_BUMP, since it now drives labels for both PRs.
• Labels applied on both the create and update paths.

Created both labels in mono/skia (colors matching mono/SkiaSharp: bump #6f42c1, sync #a371f7).

Backfill (mono/skia)

Classified every merged sync PR by whether it changed SK_MILESTONE:

Kind	PRs	bump	sync
Bumps	#122(m116), #138(m117), #139(m118), #148(m119), #171(m132), #179(m133), #184(m147), #250(m148), #253(m150), #274(m151)	✅ (10)	✅
Re-syncs / backport	#242(m147), #255(m150 Tizen backport), #259(m150), #268(m148), #278(m151)	—	✅

Final counts: 10 type/milestone-bump, 15 type/milestone-sync.

Notes:

• No mono/skia PR set m115 (it was a direct push to skiasharp), so scope starts at m116 — mirroring the parent side.
• The ancient 2016 m53 PRs (Improved Build #15, SKRect constructor with width/height broken #17) predate modern milestone tracking and were intentionally left out.
• bash -n passes; script is run directly by the workflow (no .lock.yml regeneration needed).

Co-authored-by: Copilot App 223556219+Copilot@users.noreply.github.com

[github-actions]

📦 Try the packages from this PR

Warning

Do not run these scripts without first reviewing the code in this PR.

Step 1 — Download the packages

bash / macOS / Linux:

curl -fsSL https://raw.githubusercontent.com/mono/SkiaSharp/main/scripts/get-skiasharp-pr.sh | bash -s -- 4329

PowerShell / Windows:

iex "& { $(irm https://raw.githubusercontent.com/mono/SkiaSharp/main/scripts/get-skiasharp-pr.ps1) } 4329"

Step 2 — Add the local NuGet source

dotnet nuget add source ~/.skiasharp/hives/pr-4329/packages --name skiasharp-pr-4329

More options

Option	Description
--successful-only / -SuccessfulOnly	Only use successful builds
--force / -Force	Overwrite previously downloaded packages
--list / -List	List available artifacts without downloading
--build-id ID / -BuildId ID	Download from a specific build

Or download manually from Azure Pipelines — look for the nuget artifact on the build for this PR.

Remove the source when you're done:

dotnet nuget remove source skiasharp-pr-4329

[github-actions]

📖 Documentation Preview

The documentation for this PR has been deployed and is available at:

🔗 View Staging Site
🔗 View Staging Docs
🔗 View Staging Gallery (Blazor)
🔗 View Staging Gallery (Uno Platform)
🔗 View Staging SkiaFiddle

This preview will be updated automatically when you push new commits to this PR.

---

This comment is automatically updated by the documentation staging workflow.