Fix AWS CLI installation logic in check_awscli()

[Aeagon07]

Issue

The check_awscli() function used exit 1 when AWS CLI was not installed.

Since the function is invoked as:

check_awscli || install_awscli

calling exit 1 terminates the entire script before install_awscli() can be executed.

Fix

Replaced:

exit 1

with:

return 1

This allows the function to return a failure status to the caller while preserving the intended control flow.

Why not return 0?

In shell scripting, a return value of 0 indicates success.

If check_awscli() returns 0 when AWS CLI is not installed, the shell interprets the check as successful and the right-hand side of:

check_awscli || install_awscli

will never execute.

Returning 1 correctly indicates failure and triggers install_awscli() through the || operator.

Result

• AWS CLI installed: execution continues normally.
• AWS CLI not installed: install_awscli() is executed.
• The script proceeds with the remaining workflow after installation.

[coderabbitai]

📝 Walkthrough

Walkthrough

This PR modifies day03/create_ec2.sh to improve error handling and argument passing. The check_awscli function now returns a non-zero status instead of exiting the script, enabling fallback logic to attempt installation. The script entrypoint forwards command-line arguments to main.

Changes

Script control flow improvements

Layer / File(s)	Summary
Error handling fallback and argument forwarding day03/create_ec2.sh	check_awscli changes from exit 1 to return 1, allowing the calling context to execute install_awscli as a fallback. The script's entrypoint calls main "$@" to pass command-line arguments through to main.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Poem

🐰 A script now flows with grace divine,
When AWS CLI is not aligned,
No harsh exit stops the way,
It returns to try install—hooray!
Arguments pass through, loud and clear.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title directly and concisely describes the main change: fixing the AWS CLI installation logic in the check_awscli() function by switching from exit 1 to return 1.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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