Add new property with name strategy (type VersionStrategies) to the configuration root level.

Author: HHobeck

BREAKING_CHANGES.md

@@ -32,12 +32,21 @@
 *   The `BranchPrefixToTrim` configuration property has been removed. `RegularExpression` is now used to capture named groups instead.
     *   Default `RegularExpression` for feature branches is changed from `^features?[/-]` to `^features?[/-](?<BranchName>.+)` to support using `{BranchName}` out-of-the-box
     *   Default `RegularExpression` for unknown branches is changed from `.*` to `(?<BranchName>.*)` to support using `{BranchName}` out-of-the-box
+*   The `Mainline` mode and the related implementation has been removed completely. The new `TrunkBased` version strategy should be used instead.
 *   The branch related property `is-mainline` in the configuration system has been renamed to `is-main-branch`
 *   The versioning mode has been renamed to deployment mode and consists of following values:
     *   ManualDeployment (previously ContinuousDelivery)
     *   ContinuousDelivery (previously ContinuousDeployment)
     *   ContinuousDeployment (new)
-	
+*   On the configuration root level a new property with name `version-strategy` has been introduced with following values:
+    *   ConfigNext
+    *   MergeMessage
+    *   TaggedCommit
+    *   TrackReleaseBranches
+    *   VersionInBranchName
+    *   NonTrunkBased = ConfigNext | MergeMessage | TaggedCommit | TrackReleaseBranches | VersionInBranchName,
+    *   TrunkBased
+
 ## v5.0.0
 
 *   Version numbers in branches other than `release` branches are no longer

docs/input/docs/reference/configuration.md

@@ -53,6 +53,7 @@ commit-date-format: yyyy-MM-dd
 merge-message-formats: {}
 update-build-number: true
 semantic-version-format: Strict
+version-strategy: NonTrunkBased
 branches:
   develop:
     mode: ContinuousDeployment
@@ -684,3 +685,14 @@ Example of invalid `Strict`, but valid `Loose`
 [modes]: /docs/reference/modes
 [variables]: /docs/reference/variables
 [version-sources]: /docs/reference/version-sources
+
+### version-strategy
+
+Specifies which version strategy implementation (one ore more) will be used to determine the next version. Following values are supported and can be combined:
+*   ConfigNext
+*   MergeMessage
+*   TaggedCommit
+*   TrackReleaseBranches
+*   VersionInBranchName
+*   NonTrunkBased = ConfigNext,MergeMessage,TaggedCommit,TrackReleaseBranches,VersionInBranchName
+*   TrunkBased

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

@@ -11,6 +11,7 @@ commit-date-format: yyyy-MM-dd
 merge-message-formats: {}
 update-build-number: true
 semantic-version-format: Strict
+version-strategy: NonTrunkBased
 branches:
   develop:
     label: alpha

src/GitVersion.Configuration.Tests/Configuration/ConfigurationProviderTests.cs

@@ -56,6 +56,19 @@ public void OverwritesDefaultsWithProvidedConfig()
         developConfiguration.Label.ShouldBe("dev");
     }
 
+    [Test]
+    public void CombineVersionStrategyConfigNextAndTaggedCommit()
+    {
+        // Arrange
+        SetupConfigFileContent("version-strategy: ConfigNext,TaggedCommit");
+
+        // Act
+        var configuration = this.configurationProvider.ProvideForDirectory(this.repoPath);
+
+        // Assert
+        configuration.VersionStrategy.ShouldBe(VersionStrategies.ConfigNext | VersionStrategies.TaggedCommit);
+    }
+
     [Test]
     public void CanRemoveLabel()
     {

src/GitVersion.Configuration.Tests/Configuration/Init/InitScenarios.CanSetNextVersion.approved.txt

@@ -2,6 +2,7 @@ next-version: 2.0.0
 merge-message-formats: {}
 update-build-number: true
 semantic-version-format: Strict
+version-strategy: None
 branches: {}
 ignore:
   sha: []

src/GitVersion.Configuration/ConfigurationBuilderBase.cs

@@ -24,6 +24,7 @@ internal abstract class ConfigurationBuilderBase<TConfigurationBuilder> : IConfi
     private string? commitDateFormat;
     private bool updateBuildNumber;
     private SemanticVersionFormat semanticVersionFormat;
+    private VersionStrategies versionStrategy;
     private Dictionary<string, string> mergeMessageFormats = new();
     private readonly List<IReadOnlyDictionary<object, object?>> overrides = new();
     private readonly Dictionary<string, BranchConfigurationBuilder> branchConfigurationBuilders = new();
@@ -199,6 +200,12 @@ public virtual TConfigurationBuilder WithSemanticVersionFormat(SemanticVersionFo
         return (TConfigurationBuilder)this;
     }
 
+    public virtual TConfigurationBuilder WithVersionStrategy(VersionStrategies value)
+    {
+        this.versionStrategy = value;
+        return (TConfigurationBuilder)this;
+    }
+
     public virtual TConfigurationBuilder WithMergeMessageFormats(IReadOnlyDictionary<string, string> value)
     {
         this.mergeMessageFormats = new(value);
@@ -321,6 +328,7 @@ public virtual TConfigurationBuilder WithConfiguration(IGitVersionConfiguration
         WithCommitDateFormat(value.CommitDateFormat);
         WithUpdateBuildNumber(value.UpdateBuildNumber);
         WithSemanticVersionFormat(value.SemanticVersionFormat);
+        WithVersionStrategy(value.VersionStrategy);
         WithMergeMessageFormats(value.MergeMessageFormats);
         foreach (var (name, branchConfiguration) in value.Branches)
         {
@@ -377,6 +385,7 @@ public virtual IGitVersionConfiguration Build()
             CommitDateFormat = this.commitDateFormat,
             UpdateBuildNumber = this.updateBuildNumber,
             SemanticVersionFormat = this.semanticVersionFormat,
+            VersionStrategy = this.versionStrategy,
             Branches = branches,
             MergeMessageFormats = this.mergeMessageFormats,
             DeploymentMode = this.versioningMode,

src/GitVersion.Configuration/ConfigurationFileLocator.cs

@@ -1,6 +1,5 @@
 using GitVersion.Extensions;
 using GitVersion.Helpers;
-using GitVersion.VersionCalculation;
 using Microsoft.Extensions.Options;
 
 namespace GitVersion.Configuration;
@@ -29,11 +28,7 @@ public IGitVersionConfiguration ReadConfiguration(string? configFilePath)
         if (configFilePath == null || !fileSystem.Exists(configFilePath)) return new GitVersionConfiguration();
 
         var readAllText = fileSystem.ReadAllText(configFilePath);
-        var readConfig = ConfigurationSerializer.Read(new StringReader(readAllText));
-
-        VerifyReadConfig(readConfig);
-
-        return readConfig;
+        return ConfigurationSerializer.Read(new StringReader(readAllText));
     }
 
     public IReadOnlyDictionary<object, object?>? ReadOverrideConfiguration(string? configFilePath)
@@ -64,19 +59,6 @@ bool HasConfigurationFileAt(string fileName, out string? configFile)
               || HasConfigurationFileAt(DefaultAlternativeFileName, out path);
     }
 
-    private static void VerifyReadConfig(IGitVersionConfiguration configuration)
-    {
-        // Verify no branches are set to TrunkBased mode
-        if (configuration.Branches.Any(b => b.Value.DeploymentMode == DeploymentMode.TrunkBased))
-        {
-            throw new ConfigurationException(@"TrunkBased mode only works at the repository level, a single branch cannot be put into TrunkBased mode
-
-This is because TrunkBased mode treats your entire git repository as an event source with each merge into the 'TrunkBased' incrementing the version.
-
-If the docs do not help you decide on the mode open an issue to discuss what you are trying to do.");
-        }
-    }
-
     private void WarnAboutAmbiguousConfigFileSelection(string? workingDirectory, string? projectRootDirectory)
     {
         TryGetConfigurationFile(workingDirectory, null, out var workingConfigFile);

src/GitVersion.Configuration/GitFlowConfigurationBuilder.cs

@@ -18,6 +18,7 @@ private GitFlowConfigurationBuilder()
             NoBumpMessage = IncrementStrategyFinder.DefaultNoBumpPattern,
             PatchVersionBumpMessage = IncrementStrategyFinder.DefaultPatchPattern,
             SemanticVersionFormat = ConfigurationConstants.DefaultSemanticVersionFormat,
+            VersionStrategy = ConfigurationConstants.DefaultVersionStrategy,
             TagPrefix = ConfigurationConstants.DefaultTagPrefix,
             VersionInBranchPattern = ConfigurationConstants.DefaultVersionInBranchPattern,
             TagPreReleaseWeight = ConfigurationConstants.DefaultTagPreReleaseWeight,

src/GitVersion.Configuration/GitHubFlowConfigurationBuilder.cs

@@ -18,6 +18,7 @@ private GitHubFlowConfigurationBuilder()
             NoBumpMessage = IncrementStrategyFinder.DefaultNoBumpPattern,
             PatchVersionBumpMessage = IncrementStrategyFinder.DefaultPatchPattern,
             SemanticVersionFormat = ConfigurationConstants.DefaultSemanticVersionFormat,
+            VersionStrategy = ConfigurationConstants.DefaultVersionStrategy,
             TagPrefix = ConfigurationConstants.DefaultTagPrefix,
             VersionInBranchPattern = ConfigurationConstants.DefaultVersionInBranchPattern,
             TagPreReleaseWeight = ConfigurationConstants.DefaultTagPreReleaseWeight,

src/GitVersion.Configuration/GitVersion.Configuration.csproj

@@ -1,4 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
+    <ItemGroup>
+      <None Remove="SupportedWorkflows\TrunkBased\v1.yml" />
+    </ItemGroup>
     <ItemGroup>
         <ProjectReference Include="..\GitVersion.Core\GitVersion.Core.csproj" />
     </ItemGroup>
@@ -10,6 +13,7 @@
     <ItemGroup>
         <EmbeddedResource Include="SupportedWorkflows\GitFlow\v1.yml" />
         <EmbeddedResource Include="SupportedWorkflows\GitHubFlow\v1.yml" />
+        <EmbeddedResource Include="SupportedWorkflows\TrunkBased\v1.yml" />
     </ItemGroup>
 
     <ItemGroup>