Merge pull request #3296 from AlexPykavy/main

Don't consider "tag-prefix" as optional if it's explicitly specified to `main`

Author: arturcic

src/GitVersion.Core.Tests/Configuration/ConfigurationProviderTests.CanWriteOutEffectiveConfiguration.approved.txt

@@ -1,7 +1,7 @@
 assembly-versioning-scheme: MajorMinorPatch
 assembly-file-versioning-scheme: MajorMinorPatch
 mode: ContinuousDelivery
-tag-prefix: '[vV]'
+tag-prefix: '[vV]?'
 continuous-delivery-fallback-tag: ci
 major-version-bump-message: '\+semver:\s?(breaking|major)'
 minor-version-bump-message: '\+semver:\s?(feature|minor)'

src/GitVersion.Core/Configuration/GitVersionConfiguration.cs

@@ -97,7 +97,7 @@ public override string ToString()
         return stringBuilder.ToString();
     }
 
-    public const string DefaultTagPrefix = "[vV]";
+    public const string DefaultTagPrefix = "[vV]?";
     public const string ReleaseBranchRegex = "^releases?[/-]";
     public const string FeatureBranchRegex = "^features?[/-]";
     public const string PullRequestRegex = @"^(pull|pull\-requests|pr)[/-]";

src/GitVersion.Core/PublicAPI.Shipped.txt

@@ -28,7 +28,7 @@ const GitVersion.BuildAgents.SpaceAutomation.EnvironmentVariableName = "JB_SPACE
 const GitVersion.BuildAgents.TeamCity.EnvironmentVariableName = "TEAMCITY_VERSION" -> string!
 const GitVersion.BuildAgents.TravisCi.EnvironmentVariableName = "TRAVIS" -> string!
 const GitVersion.Configuration.ConfigurationFileLocator.DefaultFileName = "GitVersion.yml" -> string!
-const GitVersion.Configuration.GitVersionConfiguration.DefaultTagPrefix = "[vV]" -> string!
+const GitVersion.Configuration.GitVersionConfiguration.DefaultTagPrefix = "[vV]?" -> string!
 const GitVersion.Configuration.GitVersionConfiguration.DevelopBranchKey = "develop" -> string!
 const GitVersion.Configuration.GitVersionConfiguration.DevelopBranchRegex = "^dev(elop)?(ment)?$" -> string!
 const GitVersion.Configuration.GitVersionConfiguration.FeatureBranchKey = "feature" -> string!

src/GitVersion.Core/VersionCalculation/SemanticVersioning/SemanticVersion.cs

@@ -143,7 +143,7 @@ public static SemanticVersion Parse(string version, string? tagPrefixRegex, Sema
 
     public static bool TryParse(string version, string? tagPrefixRegex, [NotNullWhen(true)] out SemanticVersion? semanticVersion, SemanticVersionFormat format = SemanticVersionFormat.Strict)
     {
-        var match = Regex.Match(version, $"^({tagPrefixRegex})?(?<version>.*)$");
+        var match = Regex.Match(version, $"^({tagPrefixRegex})(?<version>.*)$");
 
         if (!match.Success)
         {