How to shrink image size on upload for github user-attachments/assets in repo issues?

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Summary

To address the issue of large image uploads in GitHub issues, we need to implement a solution that automatically shrinks images to a suitable size for web page views. Image compression and resizing are key concepts in achieving this goal. The ideal solution would involve a GitHub Action that triggers when a large image is attached to a markdown file.

Root Cause

The root cause of this issue is the lack of automatic image processing when uploading attachments to GitHub issues. This leads to:

  • Large image files being uploaded, causing poor usability
  • Increased storage usage in the repository
  • Slow loading times for issues with large images

Why This Happens in Real Systems

This issue occurs in real systems because:

  • Users often upload images without considering file size or optimization
  • GitHub’s default behavior is to upload files as-is, without compression or resizing
  • Large images can be problematic for web page views, especially on mobile devices or slow internet connections

Real-World Impact

The real-world impact of this issue includes:

  • Poor user experience due to slow loading times and large image files
  • Increased storage costs for repositories with large image uploads
  • Difficulty in viewing and navigating issues with large images

Example or Code (if necessary and relevant)

import os
from PIL import Image

# Define the maximum allowed image size
MAX_IMAGE_SIZE = (800, 600)

# Define the compression quality
COMPRESSION_QUALITY = 80

# Function to resize and compress an image
def process_image(image_path):
    image = Image.open(image_path)
    image.thumbnail(MAX_IMAGE_SIZE)
    image.save(image_path, optimize=True, quality=COMPRESSION_QUALITY)

How Senior Engineers Fix It

Senior engineers fix this issue by:

  • Implementing a GitHub Action that triggers on image uploads
  • Using image processing libraries to resize and compress images
  • Configuring the action to run automatically on image uploads
  • Testing and refining the solution to ensure optimal image quality and file size

Why Juniors Miss It

Juniors may miss this issue because:

  • They may not consider the impact of large image uploads on usability and storage
  • They may not be familiar with image processing techniques or GitHub Actions
  • They may not test their solutions thoroughly, leading to suboptimal image quality or file size
  • They may not prioritize user experience and performance when designing their solutions

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