feat(applicationset): add the ability to exclude files when using the git file generator #13690

[hubmat00]

This PR implements the feature/enhancement for ApplicationSets to exclude specific files or files within specific directories when using the git file generator.

Closes #13690

The implementation is based on the already existing and proposed PR of @adamjohnson01 in the old repo. Thanks to @adamjohnson01

Note

The include/exclude (filtering) logic of this implementation includes backward-compatibility to already existing ApplicationSets.

Checklist:

• Either (a) I've created an enhancement proposal and discussed it with the community, (b) this is a bug fix, or (c) this does not need to be in the release notes.
• The title of the PR states what changed and the related issues number (used for the release note).
• The title of the PR conforms to the Toolchain Guide
• I've included "Closes [ISSUE #]" or "Fixes [ISSUE #]" in the description to automatically close the associated issue.
• I've updated both the CLI and UI to expose my feature, or I plan to submit a second PR with them.
• Does this PR require documentation updates?
• I've updated documentation as required by this PR.
• Optional. My organization is added to USERS.md.
• I have signed off all my commits as required by DCO
• I have written unit and/or e2e tests for my change. PRs without these are unlikely to be merged.
• My build is green (troubleshooting builds).
• My new feature complies with the feature status guidelines.
• I have added a brief description of why this PR is necessary and/or what this PR solves.

[codecov]

Codecov Report

Attention: 4 lines in your changes are missing coverage. Please review.

Comparison is base (f8f9ae9) 49.69% compared to head (f2b66f9) 49.57%.
Report is 24 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #15980      +/-   ##
==========================================
- Coverage   49.69%   49.57%   -0.13%     
==========================================
  Files         267      269       +2     
  Lines       46362    46622     +260     
==========================================
+ Hits        23039    23111      +72     
- Misses      21063    21237     +174     
- Partials     2260     2274      +14     

Files	Coverage Δ
.../apis/application/v1alpha1/applicationset_types.go	22.06% <ø> (ø)
applicationset/generators/git.go	84.45% <89.18%> (+0.09%)	⬆️

... and 22 files with indirect coverage changes

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[ruanyl]

Any updates to this PR?

[ronit87]

Is this PR planned in future release?

[zvlb]

Any updates? Realy need this feature)

[michaelkorofiverr]

any updates on this? it can really simplify our applicationset declarations

[banschikovde]

When will this feature be released?