Stop Leaking Secrets to GitHub | Build a Python Git Pre-Commit Hook (Step-by-Step)
Have you ever accidentally committed a password, API key, or secret to GitHub?
It happens more often than you think — and once it’s pushed, automated scanners can find it in seconds.
In this video, I build a Python-based Git pre-commit hook that blocks commits if it detects secrets like:
• AWS Access Keys
• Private Keys
• JWT Tokens
• MongoDB URIs
• Hardcoded passwords
This is a practical DevOps security tool you can use in real projects to prevent accidental credential leaks.
We go step-by-step through:
Writing the detection logic
Understanding regex patterns
Scanning staged files
Blocking commits using exit codes
Connecting the script to Git hooks
Live demo of it working
If you're a DevOps engineer, backend developer, or security-conscious programmer — this is something you should implement immediately.
⏱ Timestamps
00:00 – Live Demo (Secret Detected & Commit Blocked)
00:30 – Importing Requirements & Declaring Secret Patterns
01:20 – Creating the Staged Files Function
05:00 – Building the scan_file() Logic
08:05 – Writing the main() Function & Exit Logic
12:01 – Adding Script to Git Hooks (pre-commit)
14:00 – Final Working Demo (Commit Blocked in Action)
Get the patterns code to copy paste :
https://github.com/TheDevOpsRite/Bash...
Explore the channel and find my website for more content:
https://devopsrite.vercel.app/
🔒 Why This Matters
Public repositories are constantly scanned for exposed credentials. A simple mistake can lead to:
Cloud bill explosions
Production database exposure
API abuse
Security breaches
This lightweight Git hook prevents the mistake before it happens.
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