Fix release-line Skia sync startup by mattleibow · Pull Request #4657 · mono/SkiaSharp

mattleibow · 2026-08-04T18:05:21Z

Description

Remove the pre-agent native base build and cache added by #4573. That build ran while the parent checkout still contained the workflow branch's files, even after externals/skia had been aligned to a release branch. In run 30932472778, release/4.150.x therefore built its m150 Skia submodule against main's m151 scripts/VERSIONS.txt and failed before the agent could check out the resolved parent branch.

The agent again owns parent/submodule feature-branch checkout and the mandatory source build. Its instructions now require branching from the exact resolved bases before merging or building and note that the first cold native build normally takes 10–20 minutes.

Related issues

N/A. Fixes the regression observed in workflow run 30932472778.

Required skia PR

None.

Areas affected

Changes

None — CI-only; no public API or product behavior changes.

Testing

Regenerated the locked workflow with gh aw compile auto-skia-sync --validate. Strict validation completed with 0 errors and 0 warnings. No separate test was added because this removes the faulty optimization and the generated workflow is the executable artifact.

Checklist

Tests added or updated (not applicable; workflow source and generated output were compiler-validated)
Changes above lists all public API and behavioral changes (or "None.")
New/changed public API? N/A — no public API changes
Native change? N/A — no native changes

Remove the pre-agent native base build and cache so release syncs do not build an aligned Skia submodule against workflow-branch metadata. Reinforce exact base branching and document the expected 10-20 minute cold build. Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com> Copilot-Session: e98e70c5-d7b0-4a58-8991-9fd2d751fc03

github-actions · 2026-08-04T18:05:39Z

📦 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 -- 4657

PowerShell / Windows:

iex "& { $(irm https://raw.githubusercontent.com/mono/SkiaSharp/main/scripts/get-skiasharp-pr.ps1) } 4657"

Step 2 — Add the local NuGet source

dotnet nuget add source ~/.skiasharp/hives/pr-4657/packages --name skiasharp-pr-4657

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-4657

github-actions · 2026-08-04T18:42:11Z

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github-actions · 2026-08-04T18:45:14Z

📊 SkiaSharp benchmarks — PR #4657

⭐ this PR (full source build) vs 🌙 nightly · Linux · Windows · macOS

Informational only — this never blocks the PR. 🟢 faster / less allocation · 🔴 slower / more allocation; moves under 5% are hidden as noise.

⏱️ Times are raw BenchmarkDotNet means, and the ⭐ PR and baseline legs run on separate CI runners, so microbenchmarks can swing run-to-run — treat small time deltas as noise. Allocations are deterministic and the reliable signal. The interactive perf-dashboard (linked below) applies smoothing for the trend view.

Highlights

⏱️ Time — 🔴 1 slower · 🟢 1 faster

🔴 ColorParseBenchmark.Parse(Iterations: 1000) · Linux · 59.16 µs → 76.79 µs (+30%)
🟢 ColorParseBenchmark.Parse(Iterations: 1000) · Windows · 76.74 µs → 55.34 µs (-28%)

Full per-OS benchmark deltas

Linux

⏱️ Time (vs 🌙 nightly 4.151.0-nightly.124)

Benchmark	baseline	this PR	Δ
`ColorParseBenchmark.Parse(Iterations: 1000)`	59.16 µs	76.79 µs	🔴 +30%

Windows

⏱️ Time (vs 🌙 nightly 4.151.0-nightly.124)

Benchmark	baseline	this PR	Δ
`ColorParseBenchmark.Parse(Iterations: 1000)`	76.74 µs	55.34 µs	🟢 -28%

📈 Full interactive perf-dashboard & run details →

github-actions · 2026-08-04T21:12:34Z

📦 Artifact size report

Packages from this PR (build 1539737) vs the latest nightly baseline 4.151.0-nightly.124 (observed 2026-08-04).

Total .nupkg size: 569.4 MB → 569.3 MB (−112.6 KB, -0.0%)

Packages

⚠️ marks growth over 500.0 KB or 2%. Changes under 50.0 KB are treated as noise.

Package	baseline	this PR	Δ	Δ%
`SkiaSharp.NativeAssets.WinUI`	109.1 MB	108.5 MB	🟢 −601.2 KB	-0.5%
`SkiaSharp.NativeAssets.WebAssembly`	69.6 MB	69.7 MB	🔴 +136.8 KB	+0.2%
`SkiaSharp.NativeAssets.Win32`	85.6 MB	85.7 MB	🔴 +118.1 KB	+0.1%
`SkiaSharp.NativeAssets.Linux`	63.1 MB	63.2 MB	🔴 +73.0 KB	+0.1%
`SkiaSharp.NativeAssets.Linux.NoDependencies`	63.0 MB	63.0 MB	🔴 +70.4 KB	+0.1%

+35 package(s) unchanged (< 50.0 KB).

Per-file changes

`SkiaSharp.NativeAssets.Linux`

File	Size
🧬 `linux-arm64` (`runtimes/linux-arm64/native/libSkiaSharp.so`)	12.2 MB → 12.2 MB (🔴 +18.2 KB)
🧬 `linux-musl-arm64` (`runtimes/linux-musl-arm64/native/libSkiaSharp.so`)	12.3 MB → 12.3 MB (🔴 +18.1 KB)
🧬 `linux-loongarch64` (`runtimes/linux-loongarch64/native/libSkiaSharp.so`)	11.8 MB → 11.8 MB (🔴 +17.2 KB)
🧬 `linux-bionic-arm64` (`runtimes/linux-bionic-arm64/native/libSkiaSharp.so`)	12.4 MB → 12.5 MB (🔴 +17.0 KB)
🧬 `linux-musl-loongarch64` (`runtimes/linux-musl-loongarch64/native/libSkiaSharp.so`)	12.0 MB → 12.0 MB (🔴 +17.0 KB)
🧬 `linux-riscv64` (`runtimes/linux-riscv64/native/libSkiaSharp.so`)	11.2 MB → 11.2 MB (🔴 +17.0 KB)
🧬 `linux-musl-riscv64` (`runtimes/linux-musl-riscv64/native/libSkiaSharp.so`)	11.3 MB → 11.3 MB (🔴 +16.8 KB)
🧬 `linux-arm` (`runtimes/linux-arm/native/libSkiaSharp.so`)	8.8 MB → 8.8 MB (🔴 +11.8 KB)
🧬 `linux-musl-arm` (`runtimes/linux-musl-arm/native/libSkiaSharp.so`)	8.8 MB → 8.8 MB (🔴 +11.6 KB)
🧬 `linux-x86` (`runtimes/linux-x86/native/libSkiaSharp.so`)	13.3 MB → 13.3 MB (🔴 +3.5 KB)
🧬 `linux-x64` (`runtimes/linux-x64/native/libSkiaSharp.so`)	12.3 MB → 12.3 MB (🔴 +3.4 KB)
🧬 `linux-musl-x64` (`runtimes/linux-musl-x64/native/libSkiaSharp.so`)	12.4 MB → 12.4 MB (🔴 +3.3 KB)
🧬 `linux-bionic-x64` (`runtimes/linux-bionic-x64/native/libSkiaSharp.so`)	12.3 MB → 12.3 MB (🔴 +2.3 KB)

`SkiaSharp.NativeAssets.Linux.NoDependencies`

File	Size
🧬 `linux-arm64` (`runtimes/linux-arm64/native/libSkiaSharp.so`)	12.2 MB → 12.2 MB (🔴 +18.2 KB)
🧬 `linux-musl-arm64` (`runtimes/linux-musl-arm64/native/libSkiaSharp.so`)	12.3 MB → 12.3 MB (🔴 +18.2 KB)
🧬 `linux-loongarch64` (`runtimes/linux-loongarch64/native/libSkiaSharp.so`)	11.8 MB → 11.8 MB (🔴 +17.1 KB)
🧬 `linux-bionic-arm64` (`runtimes/linux-bionic-arm64/native/libSkiaSharp.so`)	12.4 MB → 12.5 MB (🔴 +17.0 KB)
🧬 `linux-musl-loongarch64` (`runtimes/linux-musl-loongarch64/native/libSkiaSharp.so`)	12.0 MB → 12.0 MB (🔴 +17.0 KB)
🧬 `linux-riscv64` (`runtimes/linux-riscv64/native/libSkiaSharp.so`)	11.1 MB → 11.1 MB (🔴 +17.0 KB)
🧬 `linux-musl-riscv64` (`runtimes/linux-musl-riscv64/native/libSkiaSharp.so`)	11.3 MB → 11.3 MB (🔴 +16.8 KB)
🧬 `linux-arm` (`runtimes/linux-arm/native/libSkiaSharp.so`)	8.7 MB → 8.7 MB (🔴 +11.8 KB)
🧬 `linux-musl-arm` (`runtimes/linux-musl-arm/native/libSkiaSharp.so`)	8.8 MB → 8.8 MB (🔴 +11.6 KB)
🧬 `linux-x64` (`runtimes/linux-x64/native/libSkiaSharp.so`)	12.3 MB → 12.3 MB (🔴 +3.5 KB)
🧬 `linux-x86` (`runtimes/linux-x86/native/libSkiaSharp.so`)	13.3 MB → 13.3 MB (🔴 +3.5 KB)
🧬 `linux-musl-x64` (`runtimes/linux-musl-x64/native/libSkiaSharp.so`)	12.4 MB → 12.4 MB (🔴 +3.3 KB)
🧬 `linux-bionic-x64` (`runtimes/linux-bionic-x64/native/libSkiaSharp.so`)	12.3 MB → 12.3 MB (🔴 +2.3 KB)

`SkiaSharp.NativeAssets.WebAssembly`

File	Size
🧬 `wasm 5.0.6/st,simd · libSkiaSharp.a` (`buildTransitive/netstandard1.0/libSkiaSharp.a/5.0.6/st,simd/libSkiaSharp.a`)	18.2 MB → 18.2 MB (🔴 +25.4 KB)
🧬 `wasm 5.0.6/st · libSkiaSharp.a` (`buildTransitive/netstandard1.0/libSkiaSharp.a/5.0.6/st/libSkiaSharp.a`)	17.9 MB → 18.0 MB (🔴 +25.4 KB)
🧬 `wasm 5.0.6/mt,simd · libSkiaSharp.a` (`buildTransitive/netstandard1.0/libSkiaSharp.a/5.0.6/mt,simd/libSkiaSharp.a`)	18.2 MB → 18.2 MB (🔴 +25.2 KB)
🧬 `wasm 5.0.6/mt · libSkiaSharp.a` (`buildTransitive/netstandard1.0/libSkiaSharp.a/5.0.6/mt/libSkiaSharp.a`)	17.9 MB → 17.9 MB (🔴 +25.2 KB)
🧬 `wasm 3.1.56/st · libSkiaSharp.a` (`buildTransitive/netstandard1.0/libSkiaSharp.a/3.1.56/st/libSkiaSharp.a`)	17.8 MB → 17.8 MB (🔴 +22.4 KB)
🧬 `wasm 3.1.56/mt · libSkiaSharp.a` (`buildTransitive/netstandard1.0/libSkiaSharp.a/3.1.56/mt/libSkiaSharp.a`)	17.7 MB → 17.8 MB (🔴 +22.4 KB)
🧬 `wasm 3.1.56/st,simd · libSkiaSharp.a` (`buildTransitive/netstandard1.0/libSkiaSharp.a/3.1.56/st,simd/libSkiaSharp.a`)	18.0 MB → 18.1 MB (🔴 +21.8 KB)
🧬 `wasm 3.1.56/mt,simd · libSkiaSharp.a` (`buildTransitive/netstandard1.0/libSkiaSharp.a/3.1.56/mt,simd/libSkiaSharp.a`)	18.0 MB → 18.0 MB (🔴 +21.7 KB)
🧬 `wasm 3.1.34/st,simd · libSkiaSharp.a` (`buildTransitive/netstandard1.0/libSkiaSharp.a/3.1.34/st,simd/libSkiaSharp.a`)	15.9 MB → 15.9 MB (🔴 +20.7 KB)
🧬 `wasm 3.1.34/st · libSkiaSharp.a` (`buildTransitive/netstandard1.0/libSkiaSharp.a/3.1.34/st/libSkiaSharp.a`)	15.6 MB → 15.6 MB (🔴 +20.7 KB)
🧬 `wasm 3.1.34/mt · libSkiaSharp.a` (`buildTransitive/netstandard1.0/libSkiaSharp.a/3.1.34/mt/libSkiaSharp.a`)	15.5 MB → 15.6 MB (🔴 +20.5 KB)
🧬 `wasm 3.1.34/mt,simd · libSkiaSharp.a` (`buildTransitive/netstandard1.0/libSkiaSharp.a/3.1.34/mt,simd/libSkiaSharp.a`)	15.8 MB → 15.8 MB (🔴 +20.5 KB)

`SkiaSharp.NativeAssets.Win32`

File	Size
`runtimes/win-x64/native/libSkiaSharp.pdb`	94.1 MB → 94.3 MB (🔴 +244.0 KB)
`runtimes/win-x86/native/libSkiaSharp.pdb`	96.8 MB → 97.1 MB (🔴 +244.0 KB)
`runtimes/win-arm64/native/libSkiaSharp.pdb`	91.0 MB → 91.2 MB (🔴 +220.0 KB)
🧬 `win-arm64` (`runtimes/win-arm64/native/libSkiaSharp.dll`)	11.0 MB → 11.0 MB (🔴 +17.5 KB)
🧬 `win-x64` (`runtimes/win-x64/native/libSkiaSharp.dll`)	12.8 MB → 12.8 MB (🔴 +4.5 KB)
🧬 `win-x86` (`runtimes/win-x86/native/libSkiaSharp.dll`)	11.1 MB → 11.1 MB (🔴 +3.5 KB)

`SkiaSharp.NativeAssets.WinUI`

File	Size
`runtimes/win-arm64/native/libGLESv2.pdb`	64.5 MB → 64.4 MB (🟢 −112.0 KB)
`runtimes/win-x64/native/libGLESv2.pdb`	66.6 MB → 66.5 MB (🟢 −112.0 KB)
`runtimes/win-x86/native/libGLESv2.pdb`	67.3 MB → 67.2 MB (🟢 −96.0 KB)

_{Informational only — this never blocks the PR. Native binaries are labelled by os/arch.}

github-project-automation Bot added this to SkiaSharp Backlog Aug 4, 2026

mattleibow merged commit b623810 into main Aug 4, 2026
4 of 6 checks passed

mattleibow deleted the mattleibow-fix-workflow-failure branch August 4, 2026 18:06

github-project-automation Bot moved this to Done in SkiaSharp Backlog Aug 4, 2026

mattleibow mentioned this pull request Aug 4, 2026

[skia-sync] Restore exact-base native prebuild cache #4659

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mattleibow added this to the 4.152.0-preview.1 milestone Aug 8, 2026

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Fix release-line Skia sync startup - #4657

Fix release-line Skia sync startup#4657
mattleibow merged 1 commit into
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mattleibow-fix-workflow-failure

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Linux

Windows

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github-actions Bot commented Aug 4, 2026

`SkiaSharp.NativeAssets.Linux`

`SkiaSharp.NativeAssets.Linux.NoDependencies`

`SkiaSharp.NativeAssets.WebAssembly`

`SkiaSharp.NativeAssets.Win32`

`SkiaSharp.NativeAssets.WinUI`

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mattleibow commented Aug 4, 2026

Description

Changes

Testing

Checklist

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github-actions Bot commented Aug 4, 2026

📦 Try the packages from this PR

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github-actions Bot commented Aug 4, 2026

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github-actions Bot commented Aug 4, 2026

📊 SkiaSharp benchmarks — PR #4657

Highlights

Linux

Windows

Uh oh!

github-actions Bot commented Aug 4, 2026

📦 Artifact size report

Packages

SkiaSharp.NativeAssets.Linux

SkiaSharp.NativeAssets.Linux.NoDependencies

SkiaSharp.NativeAssets.WebAssembly

SkiaSharp.NativeAssets.Win32

SkiaSharp.NativeAssets.WinUI

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`SkiaSharp.NativeAssets.Linux`

`SkiaSharp.NativeAssets.Linux.NoDependencies`

`SkiaSharp.NativeAssets.WebAssembly`

`SkiaSharp.NativeAssets.Win32`

`SkiaSharp.NativeAssets.WinUI`