Allow project defined GitVersionOutputFile.

[hubuk]

I would like to make GitVersion create gitversion.json file in different location that the default one $([MSBuild]::EnsureTrailingSlash($(BaseIntermediateOutputPath)))gitversion.json.
One of the simplest ways of doing this is by defining value for this property in Directory.Build.props file.
The problem is that GitVersion.MsBuild.props does not allow default value.

Detailed Description

A value for GitVersionOutputFile property in GitVersion.MsBuild.props should be set only if the property does not have a value assigned already.

Context

I would like to use gitversion.json file in FrontEnd project which due to some external requirements expects source file to be located in particular location. I would like to change the default location.

Possible Implementation

<GitVersionOutputFile Condition="'$(GitVersionOutputFile)' == ''">$([MSBuild]::EnsureTrailingSlash($(BaseIntermediateOutputPath)))gitversion.json</GitVersionOutputFile>

Condition attribute defined as above should be sufficient. I can prepare a PR if the requested improvement is acceptable by maintainers 😊

[arturcic]

Honestly I'm not against, it might provide more flexibility. Go for it

[github-actions]

🎉 This issue has been resolved in version 5.8.0 🎉
The release is available on:

• GitHub Release
• Chocolatey Package
• .Net Global Tool

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