fix: remove project build dirs from Android Gradle cache by AnthonyRonning · Pull Request #376 · OpenSecretCloud/Maple

AnthonyRonning · 2026-01-09T05:31:54Z

Problem

The Android build CI was failing with:

zstd: error 70 : Write error : cannot write block : No space left on device

Cause

The Gradle cache was including project-level build outputs:

frontend/src-tauri/gen/android/.gradle
frontend/src-tauri/gen/android/build
frontend/src-tauri/gen/android/app/build

These directories contain APKs, AABs, and native .so files for 4 Android architectures, which are very large and caused the runner to run out of disk space during cache save.

Fix

Keep only the global Gradle caches:

~/.gradle/caches - Downloaded dependencies (the valuable part)
~/.gradle/wrapper - Gradle wrapper

The Rust compilation is already cached via sccache, so the native library build time is preserved.

Files Changed

.github/workflows/android-build.yml
.github/workflows/release.yml

Summary by CodeRabbit

Chores
- Optimized Android build caching configuration by excluding generated build directories, reducing cache footprint in CI/CD workflows.

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The cache was including build outputs (APKs, .so files for 4 architectures) which caused 'No space left on device' errors during post-job cache save. Keep only ~/.gradle/caches and ~/.gradle/wrapper which contain the downloaded dependencies. sccache already handles Rust compilation caching. Co-authored-by: factory-droid[bot] <138933559+factory-droid[bot]@users.noreply.github.com>

coderabbitai · 2026-01-09T05:32:04Z

📝 Walkthrough

Walkthrough

Removed three Gradle cache directory paths from the Android build caching configuration in both android-build.yml and release.yml workflows. The cache key logic remains unchanged, but excludes the .gradle, build, and app/build directories from being cached.

Changes

Cohort / File(s)	Summary
Gradle cache configuration `.github/workflows/android-build.yml`, `.github/workflows/release.yml`	Removed three Gradle cache paths: `frontend/src-tauri/gen/android/.gradle`, `frontend/src-tauri/gen/android/build`, and `frontend/src-tauri/gen/android/app/build`. Cache key matching logic preserved.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~5 minutes

Possibly related PRs

Maple#257: Adds an Android build job that uses Gradle cache; complements the cache path narrowing in this PR by establishing the foundation for the modified caching strategy.

Poem

🐰 Hopping through workflows with cache so neat,
Three paths trimmed away, the cleanup's complete!
Less junk to remember, more swiftly we go,
Android builds dancing, much lighter and fleet! 🚀

🚥 Pre-merge checks | ✅ 2

✅ Passed checks (2 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately and concisely summarizes the main change: removing project build directories from Android Gradle cache to fix disk space issues.

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📜 Recent review details

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 52f2b2b and bb80c50.

📒 Files selected for processing (2)

.github/workflows/android-build.yml
.github/workflows/release.yml

💤 Files with no reviewable changes (2)

.github/workflows/android-build.yml
.github/workflows/release.yml

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cloudflare-workers-and-pages · 2026-01-09T05:32:33Z

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greptile-apps

Greptile Overview

Greptile Summary

This PR fixes a disk space issue in Android CI builds by removing project-level build directories from the Gradle cache configuration in both android-build.yml and release.yml workflows.

Problem: The CI was failing with "No space left on device" during cache save operations because the Gradle cache included large build artifacts (APKs, AABs, and native .so files for 4 Android architectures).

Solution: The change removes three project-specific paths from the cache configuration:

frontend/src-tauri/gen/android/.gradle (project Gradle cache)
frontend/src-tauri/gen/android/build (project build outputs)
frontend/src-tauri/gen/android/app/build (app build outputs)

While keeping the valuable global Gradle caches:

~/.gradle/caches (downloaded dependencies)
~/.gradle/wrapper (Gradle wrapper distribution)

Impact: This change reduces cache size significantly without impacting build performance, since Rust compilation (the most time-consuming part) is already cached separately via sccache. The build artifacts don't need to be cached as they're the final outputs uploaded as artifacts.

Confidence Score: 5/5

Safe to merge - fixes critical disk space issue without introducing any bugs or breaking changes
The change is straightforward and low-risk: it removes unnecessary paths from cache configuration. The removed directories contain build outputs (APKs, AABs, compiled libraries) that should not be cached. The valuable dependency caches are retained. Build functionality remains intact since sccache handles Rust compilation separately.
No files require special attention

Important Files Changed

File Analysis

Filename	Score	Overview
.github/workflows/android-build.yml	5/5	Removed project build directories from Gradle cache to prevent disk space issues while keeping dependency caches
.github/workflows/release.yml	5/5	Removed project build directories from Gradle cache to prevent disk space issues while keeping dependency caches

Sequence Diagram

sequenceDiagram
participant GHA as GitHub Actions Runner
participant Cache as Actions Cache
participant Gradle as Gradle Build
participant Rust as Rust/sccache
Note over GHA,Cache: Before (Disk Space Issue)
GHA->>Cache: Restore Gradle cache
Cache-->>GHA: ~/.gradle/caches, ~/.gradle/wrapper<br/>+ project build outputs
GHA->>Gradle: Build Android app
Gradle->>Rust: Compile native libraries (4 architectures)
Rust-->>Gradle: .so files (~large)
Gradle-->>GHA: APKs, AABs, build artifacts
GHA->>Cache: Save cache (includes APKs, AABs, .so files)
Cache-->>GHA: ERROR: No space left on device
Note over GHA,Cache: After (Fixed)
GHA->>Cache: Restore Gradle cache
Cache-->>GHA: ~/.gradle/caches, ~/.gradle/wrapper only
GHA->>Rust: Compile native libraries
Note over Rust: sccache handles Rust cache separately
Rust-->>GHA: Cached compilation
GHA->>Gradle: Build Android app
Gradle-->>GHA: APKs, AABs (not cached)
GHA->>Cache: Save cache (dependencies only)
Cache-->>GHA: Success

greptile-appsBot reviewed Jan 9, 2026
View reviewed changes

AnthonyRonning merged commit 925c1b5 into masterJan 9, 2026
7 checks passed

AnthonyRonning deleted the fix/android-cache-disk-space branch January 9, 2026 05:46

This was referenced Jan 9, 2026
ci: Refactor android build pipeline #377
Closed
ci: parallelize Android Rust builds #381
Closed
ci: parallelize Android Rust builds across all 4 architectures #386
Merged

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fix: remove project build dirs from Android Gradle cache - #376

fix: remove project build dirs from Android Gradle cache#376
AnthonyRonning merged 1 commit into
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fix/android-cache-disk-space

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Confidence Score: 5/5

Important Files Changed

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AnthonyRonning commented Jan 9, 2026•
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