Coding⏱️ 4 min read📅 2026-06-11

How to Fix: How to create a series of commands in shell, which will stop execution on error

How to create a shell function that stops execution on error during Git deployment.

Quick Answer: Use a shell function with the return statement and trap for errors.

📋 Table of Contents

  1. 💡 Why You Are Getting This Error
  2. 🛠️ Step-by-Step Verified Fixes
  3. 💡 Conclusion

If you're experiencing issues with your Git workflow, it's likely due to a merge conflict that's stopping the deployment process. This can be frustrating for developers who are working on tight deadlines.

However, there is a way to automate this process and stop execution on error. By creating a series of commands in shell, you can create a function that will execute all these commands, but if one of them returns an error, it stops right there.

💡 Why You Are Getting This Error

  • The primary reason why merge conflicts occur is due to differences in the code changes made by different developers. When two or more developers make changes to the same file, their changes may not be compatible with each other.
  • Another possible cause of merge conflicts could be the use of conflicting Git branches or tags.

🛠️ Step-by-Step Verified Fixes

Using a Shell Script to Automate Deployment

  1. Step 1: Step 1: Create a new file called 'deploy.sh' in your project directory. This file will contain all the commands that are executed during deployment.
  2. Step 2: Step 2: Inside the 'deploy.sh' file, use the 'git pull' command to fetch the latest changes from the remote repository. Then, use the 'git push' command to push the local changes to the remote repository.
  3. Step 3: Step 3: Next, use the 'git checkout production' command to switch to the production branch. Then, use the 'git pull' command again to update the production branch with the latest changes from the master branch.
  4. Step 4: Step 4: After that, use the 'git merge master' command to merge the master branch into the production branch. If there are any conflicts, this will stop the execution of the script and display an error message.
  5. Step 5: Step 5: Finally, use the 'git push' command again to push the merged changes to the remote repository.

Using a Git Hook to Automate Deployment

  1. Step 1: Step 1: Create a new file called '.git/hooks/pre-merge-commit' in your project directory. This file will contain a script that will be executed before the merge is committed.
  2. Step 2: Step 2: Inside the '.git/hooks/pre-merge-commit' file, use the 'git status' command to check if there are any conflicts. If there are any conflicts, this will stop the execution of the script and display an error message.
  3. Step 3: Step 3: Next, you can add additional commands to the script to handle the merge conflict. For example, you could use the 'git checkout --theirs' command to switch to the 'theirs' version of the file.

💡 Conclusion

By using either of these methods, you can automate your Git deployment process and stop execution on error. This will save you time and effort in the long run, and ensure that your project is deployed consistently and accurately.

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