Use config to find the main branch by regex

Use the `Config` class to find the `main` branch via its configured
regex instead of using a hard coded branch name.

Author: asbjornu

src/GitVersion.Core/Core/Abstractions/IRepositoryStore.cs

@@ -18,6 +18,7 @@ public interface IRepositoryStore
 
     IBranch GetTargetBranch(string? targetBranchName);
     IBranch? FindBranch(string? branchName);
+    IBranch? FindMainBranch(Config configuration);
     IBranch? GetChosenBranch(Config configuration);
     IEnumerable<IBranch> GetBranchesForCommit(ICommit commit);
     IEnumerable<IBranch> GetExcludedInheritBranches(Config configuration);

src/GitVersion.Core/Core/RepositoryStore.cs

@@ -126,6 +126,18 @@ public IBranch GetTargetBranch(string? targetBranchName)
 
     public IBranch? FindBranch(string? branchName) => this.repository.Branches.FirstOrDefault(x => x.Name.EquivalentTo(branchName));
 
+    public IBranch? FindMainBranch(Config configuration)
+    {
+        var mainBranchRegex = configuration.Branches[Config.MainBranchKey]?.Regex;
+        if (mainBranchRegex == null)
+        {
+            return null;
+        }
+
+        return this.repository.Branches.FirstOrDefault(b =>
+            Regex.IsMatch(b.Name.Friendly, mainBranchRegex, RegexOptions.IgnoreCase));
+    }
+
     public IBranch? GetChosenBranch(Config configuration)
     {
         var developBranchRegex = configuration.Branches[Config.DevelopBranchKey]?.Regex;

src/GitVersion.Core/VersionCalculation/BaseVersionCalculators/TrackReleaseBranchesVersionStrategy.cs

@@ -26,14 +26,16 @@ public class TrackReleaseBranchesVersionStrategy : VersionStrategyBase
     private readonly IRepositoryStore repositoryStore;
     private readonly VersionInBranchNameVersionStrategy releaseVersionStrategy;
     private readonly TaggedCommitVersionStrategy taggedCommitVersionStrategy;
+    private readonly Config configuration;
+
 
     public TrackReleaseBranchesVersionStrategy(IRepositoryStore repositoryStore, Lazy<GitVersionContext> versionContext)
         : base(versionContext)
     {
         this.repositoryStore = repositoryStore.NotNull();
-
         this.releaseVersionStrategy = new VersionInBranchNameVersionStrategy(repositoryStore, versionContext);
         this.taggedCommitVersionStrategy = new TaggedCommitVersionStrategy(repositoryStore, versionContext);
+        this.configuration = versionContext.Value.Configuration.Configuration;
     }
 
     public override IEnumerable<BaseVersion> GetVersions() =>
@@ -43,9 +45,7 @@ public override IEnumerable<BaseVersion> GetVersions() =>
 
     private IEnumerable<BaseVersion> MainTagsVersions()
     {
-        var main = this.repositoryStore.FindBranch(Config.MainBranchKey)
-            // For compatibility reason try to find `master` if `main` cannot be found
-            ?? this.repositoryStore.FindBranch(Config.MasterBranchKey);
+        var main = this.repositoryStore.FindMainBranch(this.configuration);
 
         return main != null
             ? this.taggedCommitVersionStrategy.GetTaggedVersions(main, null)