fix(args): allow -o and -p together if they point to different files

[antonengelhardt]

setting prepend and output together will ignore the prepend flag

Description

• preprend and output flags are conflicting and should only be used together if they point to different paths

Motivation and Context

orhun/git-cliff-action#21 (comment)

How Has This Been Tested?

I build it locally and tested it with one of my rust projects

Screenshots / Logs (if applicable)

Types of Changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation (no code change)
• Refactor (refactoring production code)
• Other

not sure

Checklist:

• My code follows the code style of this project.
• I have updated the documentation accordingly.
• I have formatted the code with rustfmt.
• I checked the lints with clippy.
• I have added tests to cover my changes.
• All new and existing tests passed.

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[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 4 lines in your changes are missing coverage. Please review.

Project coverage is 41.65%. Comparing base (dd538c8) to head (3b81a56).
Report is 2 commits behind head on main.

Files	Patch %	Lines
git-cliff/src/lib.rs	0.00%	4 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #653      +/-   ##
==========================================
- Coverage   41.90%   41.65%   -0.24%     
==========================================
  Files          15       15              
  Lines        1079     1083       +4     
==========================================
- Hits          452      451       -1     
- Misses        627      632       +5     

Flag	Coverage Δ
unit-tests	41.65% <0.00%> (-0.24%)	⬇️

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[antonengelhardt]

@orhun i ticked that this is a breaking change. Not sure though. WDYT?

[orhun]

Ah, I found an issue: #120

It turns out someone actually requested this feature in the past, so I'm a bit unsure about merging this :/

I think we can bring back the note in the git-cliff-action repo instead. What do you think?

[antonengelhardt]

Yeah, I get your point.

In my opinion, output and prepend should work together, but only if the file paths are not equal.

If the file paths are the same, it does not make sense to use both flags and an error should be shown.

Do you agree?

[orhun]

Actually yes, that sounds more reasonable!

[antonengelhardt]

Any idea for the error message?

[orhun]

Something along the lines of "Output files cannot be the same" maybe

[orhun]

Awesome, thanks!

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Congrats on merging your first pull request! ⛰️