feat: run UCC in an isolated environment

[kkedziak-splunk]

Document with more info

This PR allows to separate UCC from TA dependencies, in order to avoid dependency conflicts.

UCC version may be specified in requirements_ucc.txt file. Then, the action will install UCC in an isolated environment.

[Copilot]

Pull Request Overview

This PR adds support for a UCC_VERSION file that allows users to specify a particular version of the splunk-add-on-ucc-framework to install and use, rather than relying on the default ucc-gen executable. When the UCC_VERSION file is present, the action installs pip-run and uses it to run the specified version of the UCC framework.

• Adds conditional logic to check for UCC_VERSION file existence
• Dynamically sets the UCC executable based on whether a version file is present
• Replaces hardcoded ucc-gen command with a variable UCC_EXECUTABLE

Comments suppressed due to low confidence (1)

action.yml:63

• The if statement is missing a closing bracket. It should be if [ -f "UCC_VERSION" ] followed by then on the same line or add a semicolon: if [ -f "UCC_VERSION" ]; then

        if [ -f "UCC_VERSION" ]

[mbruzda-splunk]

Test run: https://github.com/splunk/splunk-add-on-for-amazon-web-services/actions/runs/16563258546/job/46838388294?pr=1500

[mbruzda-splunk]

You are missing closing brackets for the if statement

Suggested change

	if [ -f "requirements_ucc.txt" ]
	if [ -f "requirements_ucc.txt" ] ;

[mbruzda-splunk]

Suggested change

	if [ ! -f "./.ucc_venv/bin/ucc-gen" ]
	if [ ! -f "./.ucc_venv/bin/ucc-gen" ] ;

[mbruzda-splunk]

Suggested change

	if [ -f "./.ucc_venv/bin/ucc-gen" ]
	if [ -f "./.ucc_venv/bin/ucc-gen" ] ;

[mkolasinski-splunk]

WDYT about adding here an else condition with warning message to migrate ucc dependency to a separate file?

[mkolasinski-splunk]

@kkedziak-splunk I like the idea. I'd suggest we define a policy that says all TA repositories should use the ucc dependency consistently. During a transition period, the action could support both requirements_ucc.txt and pyproject.toml. But long-term, I think we should avoid supporting both formats - just pick one as the final approach.

[kdoroszko-splunk]

@mbruzda-splunk, I think this solution would require some adjustments in template repository (i.e. ucc version would need to be parsed from requirements_ucc.txt. Also there might be some changes needed in local tests execution manuals).