- name: Inspect restored cache run: | echo "Cache directory contents:" ls -la ~/.npm du -sh ~/.npm echo "File timestamps:" stat ~/.npm/cache/_cacache/index-v5/11/1a/* || echo "No cache found"
In the race for sub-minute build times, a transparent and debuggable cache is your most powerful asset.
Referencing Go-based implementations , we demonstrate how a lightweight CLI can: List all active cache keys for a specific repository.
GitHub provides a management interface to see what is currently stored: Navigate to your repository on GitHub. Click the tab. In the left sidebar, under Management , click Caches .
Look for changing environment variables (like PATH or timestamps) that are leaking into the action environment and invalidating the cache. Best Practices for Healthy Action Caching
Sometimes, built-in tools are insufficient. Create a dedicated debug script in your repo: .github/scripts/debug_cache.sh
user wants a long article about "debug-action-cache". This appears to be a GitHub Actions concept related to debugging cache actions. I need to gather comprehensive information. I'll follow the search plan as outlined. search results have provided some initial information. I need to gather more in-depth details. I'll follow the search plan for deeper dives. have gathered a substantial amount of information. Now I need to structure the article. The article will cover: introduction, understanding the caching mechanism, enabling debug mode, interpreting logs, common issues and solutions, performance debugging, best practices, and conclusion. I'll cite relevant sources.ging CI/CD pipelines is often a frustrating task, but few things are as perplexing as a broken, slow, or misbehaving cache. You’ve meticulously set up your actions/cache step to speed up your workflows, yet it stubbornly restores nothing, saves nothing, or even breaks the build. When the standard logs show only silence and a simple "Post job cleanup," how do you uncover what's really happening? This is where debug-action-cache —the collective art and science of enabling verbose logging for GitHub’s actions/cache —becomes your most powerful diagnostic tool. It lifts the hood on GitHub’s opaque caching service, transforming it from a "black box of mystery" into a transparent, decipherable system.
If you suspect "Ghost Caches" (caches that exist but aren't being picked up), use the GitHub CLI ( gh ) to list caches currently stored for the repo.
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