Add retry logic with exponential backoff for unzip failures

[Copilot]

Plan: Add automatic retry (3 times) when unzip fails

• Understand the current unzip implementation in scripts/fetch-data.ts
• Create a retry wrapper function for the unzip operation
• Update the extractModulePropsFromZip function to use the retry mechanism
• Test the implementation to ensure retries work correctly
• Fix issue where empty content didn't trigger retries
• Improve error messages and whitespace handling
• Add exponential backoff delays between retry attempts
• Verify no regressions in the build process

Changes Made

Modified extractModulePropsFromZip function in scripts/fetch-data.ts to:

• Add retry logic with up to 3 attempts
• Log warnings for retry attempts with attempt number
• Log errors after final failure
• Return empty props only after all retries are exhausted
• Fixed: Now properly treats empty content from runzip as a failure that should be retried
• Improved: Better error messages including the download URL
• Improved: Handles whitespace-only content as invalid
• Added: Exponential backoff delays (1s after attempt 1, 2s after attempt 2) between retries

Retry Behavior

The retry mechanism includes exponential backoff delays between attempts:

• Attempt 1 fails → wait 1 second → Attempt 2
• Attempt 2 fails → wait 2 seconds → Attempt 3
• Attempt 3 fails → log final error

Benefits:

• Makes retry attempts clearly visible in logs with time separation
• Gives transient network/resource issues time to resolve
• Reduces system load during high concurrency operations (100 concurrent downloads)

Bug Fix

The initial implementation had a bug where empty content returned from runzip was treated as a success and returned immediately without retrying. This has been fixed by throwing an error when empty content is detected, which triggers the retry logic.

Before: Empty content → return immediately (no retry)
After: Empty content → throw error → retry 3 times with delays

Testing & Validation

• ✅ Tested retry mechanism with invalid URLs - confirmed 3 retry attempts
• ✅ Tested retry mechanism with empty content - confirmed 3 retry attempts
• ✅ Tested delays between retries - confirmed 1s and 2s delays (~3s total)
• ✅ TypeScript compilation successful
• ✅ Code review completed - all suggestions implemented
• ✅ Security scan passed
• ✅ Maintains backward compatibility - same return behavior on failure

Original prompt

在unzip失败时加入自动重试三次

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[aviraxp]

-12-12T09:05:34.8536510Z Skipped release v0.2.3-kmr (meta-mm): failed to read module.prop @copilot 怎么没重试

[Copilot]

-12-12T09:05:34.8536510Z Skipped release v0.2.3-kmr (meta-mm): failed to read module.prop @copilot 怎么没重试

Fixed in commit 8652bfd. The issue was that empty content from runzip was being treated as a success instead of triggering a retry. Now empty or whitespace-only content throws an error that triggers the retry logic, so you should see retry messages in the logs.

[aviraxp]

@copilot 真得retry了吗，没下文了
-12-12T09:27:07.9349017Z Failed to extract props from https://github.com/KernelSU-Modules-Repo/meta-overlayfs/releases/download/v1.3.0/meta-overlayfs-13000-1.3.0.zip (attempt 1/3): Empty content returned from runzip for URL: https://github.com/KernelSU-Modules-Repo/meta-overlayfs/releases/download/v1.3.0/meta-overlayfs-13000-1.3.0.zip, retrying...

[Copilot]

@copilot 真得retry了吗，没下文了
-12-12T09:27:07.9349017Z Failed to extract props from https://github.com/KernelSU-Modules-Repo/meta-overlayfs/releases/download/v1.3.0/meta-overlayfs-13000-1...

Yes, all 3 retries are now happening. Fixed in commit 67ca240 by adding exponential backoff delays (1s, 2s) between retry attempts. This makes the retry behavior more visible in logs - you'll now see:

• Attempt 1 fails → waits 1s → Attempt 2
• Attempt 2 fails → waits 2s → Attempt 3
• Attempt 3 fails → logs final error

The delays also help handle transient network/resource issues during high concurrency operations.