[Bug] Unable to suppress "Multiple branch configurations match the current branch"

[gerardog]

Describe the bug

1. The warning "Multiple branch configurations match the current branch" should not appear with /verbosity quiet
2. The warning should be written to StdErr so capturing gitversion shouldnt break.

Actual Behavior

Parsing the json output of gitversion fails if there is a branch that matches more than one branch regex

PS C:\git\aa> $version = dotnet-gitversion | Convertfrom-Json
ConvertFrom-Json: Conversion from JSON failed with error: Unexpected character encountered while parsing value: M. Path '', line 0, position 0.
PS C:\git\aa> $version = dotnet-gitversion | Convertfrom-Json
PS C:\git\aa> $version = dotnet-gitversion /nocache| Convertfrom-Json
ConvertFrom-Json: Conversion from JSON failed with error: Unexpected character encountered while parsing value: M. Path '', line 0, position 0.

Possible Fix

Steps to Reproduce

Run in powershell for multiline support

md test
cd test
git init

echo "mode: Mainline
branches:
   master:
     regex: '^master$|^main$'
   other:
     mode: ContinuousDelivery
     regex: '^(?!master$|^main$/).*$'  # All branches except main, master
     tag: '{BranchName}'               # Shall have a prerelease tag based on the branch name.
     source-branches: ['main', 'master']
     increment: patch" > .\GitVersion.yml

git add . 
git commit -m "Added gitversion"
dotnet-gitversion 

{
  "Major": 0,
  "Minor": 1,
  "Patch": 1,
  ...
}

git checkout -B feature/hello

dotnet-gitversion 

Multiple branch configurations match the current branch branchName of 'feature/a'. Using the first matching configuration, 'other'. Matching configurations include:'
 - other
 - feature'
{
 "Major": 0,
  "Minor": 1,
  "Patch": 1,
 
}

Context

Your Environment

• dotnet tool install GitVersion.Tool --global
• 5.12.0+Branch.support-5.x.Sha.3f75764963eb3d7956dcd5a40488c074dd9faf9e

• Version Used:
• Operating System and version (Windows 10, Ubuntu 18.04):
• Link to your project:
• Link to your CI build (if appropriate):

[HHobeck]

Does this happen also with the 6.0.0-beta-3 version of git version?

[gerardog]

If you run the steps in 6.0.0-beta-3 you will first find this issue:

Could not build the configuration instance because following exception occurred: 'Property 'tag' not found on type 'GitVersion.Configuration.BranchConfiguration'.' Please ensure that the /overrideconfig parameters are correct and the configuration file is in the correct format.

I'm worried I couldnt find the breaking change reason, fix or workaround by digging around the docs or doing a quick look at the releases. This change will break a lot of customers. Maybe it's time to setup a 6.x migration guide.

Regarding the warning: It no longer ocurrs in 6.x since the warning was removed:
diff

[HHobeck]

Okay great then it is not a problem anymore. :)

After the features are finalized and the bugs are fixed the documentation needs to be done of course. Currently GitVersion is in the beta stage with following open issues: https://github.com/GitTools/GitVersion/milestone/19

It seems to be that you are a sophisticated programmer. Are you interested to help with one of this issues?