ci: free disk space on Linux E2E runners before building Electron apps

[goosewobbler]

The flake

E2E - Electron [Linux] - script has intermittently failed because the GitHub-hosted Linux runner runs out of disk space mid-test. The runner's own worker crashes with System.IO.IOException: No space left on device, so the test step never finishes and the job log blob is never uploaded — the failure surfaces as an opaque dead job rather than a test error.

Observed on #298 and #301.

The fix

Add an early Linux-only "Free Disk Space" step to the E2E reusable workflow, placed after the build filter is generated and before "Build Test Applications", so the build/test phase has headroom.

• Dependency-free: plain shell, no third-party action (e.g. no jlumbroso/free-disk-space) — zero new supply-chain surface, nothing for dependabot to track.
• Gated to Linux via if: runner.os == 'Linux'.
• Prints df -h / before and after, then sudo rm -rf large preinstalled toolchains unused by these Electron/web tests (.NET, Android SDK, GHC/ghcup, CodeQL, Swift) and prunes Docker images.
• Non-fatal: every removal is guarded with || true, so a missing path or prune failure can never fail the job.

Scope

Only .github/workflows/_ci-e2e.reusable.yml is touched — the observed crashes were E2E-only. The same step could be lifted into the package/build workflows later if disk pressure shows up there.

Validation

Locally validated as parseable YAML and passes actionlint. CI will exercise the step on the next Linux E2E run.

🤖 Generated with Claude Code

[github-actions]

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Updated automatically by ReleaseKit

[greptile-apps]

Greptile Summary

Adds a Linux-only disk cleanup step to the E2E reusable workflow to prevent the intermittent "No space left on device" runner crashes seen on #298 and #301. The step is placed immediately after checkout — before pnpm install and artifact download — so every subsequent step benefits from the freed space.

• Removes large, unused pre-installed toolchains (.NET, Android SDK, GHC/ghcup, CodeQL, Swift) and prunes Docker images using plain shell; no third-party action required.
• Every removal is guarded with || true and the step is gated to runner.os == 'Linux', so it cannot fail the job or affect macOS/Windows runs.

Confidence Score: 5/5

This is a safe, additive-only change to a CI workflow that cannot regress existing build or test logic.

The change adds a single, well-guarded shell step that removes well-known unused toolchain directories on GitHub-hosted Linux runners. The || true on every removal and the if: runner.os == 'Linux' gate mean it is impossible for this step to fail the job or affect macOS/Windows runs. The paths targeted are the standard set documented and used across the GitHub Actions community for disk reclamation. Placement immediately after checkout ensures maximum benefit.

No files require special attention.

Important Files Changed

Filename	Overview
.github/workflows/_ci-e2e.reusable.yml	Adds a Linux-only "Free Disk Space" step immediately after checkout that removes unused toolchains (.NET, Android, GHC, CodeQL, Swift) and prunes Docker images; all removals guarded with `

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[👷 Checkout Repository] --> B{runner.os == 'Linux'?}
    B -- Yes --> C[🧹 Free Disk Space\nsudo rm -rf dotnet/android/ghc/CodeQL/swift\ndocker image prune]
    B -- No --> D[🛠️ Setup Development Environment]
    C --> D
    D --> E[📦 Download Build Artifacts]
    E --> F[📊 Show Build Information]
    F --> G[🔒 Validate Build Command]
    G --> H[🪄 Generate Build Filter]
    H --> I[🏗️ Build Test Applications]
    I --> J[🔗 Setup Protocol Handlers]
    J --> K[🪄 Generate Test Execution Plan]
    K --> L[🧪 Execute E2E Tests]
    L --> M{Success?}
    M -- Failure --> N[🐛 Show Logs on Failure]
    M -- Always --> O[📦 Upload Test Logs]
    N --> O
    O --> P[🐛 Debug Build on Failure]

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_{Reviews (3): Last reviewed commit: "ci: run the Linux free-disk step right a..." | Re-trigger Greptile}