Allow for numeric pre release tags

src/GitVersionCore.Tests/IntegrationTests/OtherScenarios.cs

@@ -78,7 +78,7 @@ public void AllowHavingMainInsteadOfMaster()
             Commands.Checkout(fixture.Repository, fixture.Repository.CreateBranch("main"));
             fixture.Repository.Branches.Remove(fixture.Repository.Branches["master"]);
 
-            fixture.AssertFullSemver("0.1.0+0", config);
+            fixture.AssertFullSemver("0.1.0-1+0", config);
         }
 
         [Test]

src/GitVersionCore.Tests/IntegrationTests/ReleaseBranchScenarios.cs

@@ -84,6 +84,19 @@ public void CanTakeVersionFromReleasesBranch()
             fixture.AssertFullSemver("2.0.0-beta.1+2");
         }
 
+        [Test]
+        public void CanTakePreReleaseVersionFromReleasesBranchWithNumericPreReleaseTag()
+        {
+            using var fixture = new EmptyRepositoryFixture();
+            fixture.Repository.MakeCommits(5);
+            fixture.Repository.CreateBranch("releases/2.0.0");
+            fixture.Checkout("releases/2.0.0");
+            fixture.Repository.ApplyTag("v2.0.0-1");
+
+            var variables = fixture.GetVersion();
+            Assert.AreEqual("2.0.0-1", variables.FullSemVer);
+        }
+
         [Test]
         public void ReleaseBranchWithNextVersionSetInConfig()
         {

src/GitVersionCore.Tests/VersionCalculation/SemanticVersionTests.cs

@@ -20,6 +20,7 @@ public class SemanticVersionTests : TestBase
         [TestCase("1.2-alpha4", 1, 2, 0, "alpha", 4, null, null, null, null, "1.2.0-alpha.4", null)]
         [TestCase("1.2.3-rc", 1, 2, 3, "rc", null, null, null, null, null, null, null)]
         [TestCase("1.2.3-rc3", 1, 2, 3, "rc", 3, null, null, null, null, "1.2.3-rc.3", null)]
+        [TestCase("1.2.3-3", 1, 2, 3, "", 3, null, null, null, null, "1.2.3-3", null)]
         [TestCase("1.2.3-RC3", 1, 2, 3, "RC", 3, null, null, null, null, "1.2.3-RC.3", null)]
         [TestCase("1.2.3-rc3.1", 1, 2, 3, "rc3", 1, null, null, null, null, "1.2.3-rc3.1", null)]
         [TestCase("01.02.03-rc03", 1, 2, 3, "rc", 3, null, null, null, null, "1.2.3-rc.3", null)]
@@ -119,6 +120,21 @@ public void ToStringSTests()
                 }
             };
             Assert.AreEqual("1.2.3-beta.4", fullSemVer.ToString("s"));
+            var fullSemVerNoPreReleaseName = new SemanticVersion
+            {
+                Major = 1,
+                Minor = 2,
+                Patch = 3,
+                PreReleaseTag = new SemanticVersionPreReleaseTag("", 4),
+                BuildMetaData = new SemanticVersionBuildMetaData
+                {
+                    Sha = "theSha",
+                    Branch = "TheBranch",
+                    CommitsSinceTag = 5,
+                    OtherMetaData = "TheOtherMetaData"
+                }
+            };
+            Assert.AreEqual("1.2.3-4", fullSemVerNoPreReleaseName.ToString("s"));
         }
         [Test]
         public void ToStringLTests()
@@ -183,6 +199,21 @@ public void ToStringTests()
                 }
             };
             Assert.AreEqual("1.2.3-beta.4", fullSemVer.ToString());
+            var fullSemVerNoPreReleaseName = new SemanticVersion
+            {
+                Major = 1,
+                Minor = 2,
+                Patch = 3,
+                PreReleaseTag = new SemanticVersionPreReleaseTag("", 4),
+                BuildMetaData = new SemanticVersionBuildMetaData
+                {
+                    Sha = "theSha",
+                    Branch = "TheBranch",
+                    CommitsSinceTag = 5,
+                    OtherMetaData = "TheOtherMetaData"
+                }
+            };
+            Assert.AreEqual("1.2.3-4", fullSemVerNoPreReleaseName.ToString());
         }
         [Test]
         public void ToStringFTests()

src/GitVersionCore/VersionCalculation/SemanticVersioning/SemanticVersionPreReleaseTag.cs

@@ -25,10 +25,12 @@ public SemanticVersionPreReleaseTag(SemanticVersionPreReleaseTag preReleaseTag)
         {
             Name = preReleaseTag.Name;
             Number = preReleaseTag.Number;
+            PromotedFromCommits = preReleaseTag.PromotedFromCommits;
         }
 
         public string Name { get; set; }
         public int? Number { get; set; }
+        public bool PromotedFromCommits { get; set; }
 
         public override bool Equals(object obj)
         {
@@ -168,15 +170,15 @@ public string ToString(string format, IFormatProvider formatProvider = null)
 
             return format switch
             {
-                "t" => (Number.HasValue ? $"{Name}.{Number}" : Name),
+                "t" => (Number.HasValue ? string.IsNullOrEmpty(Name) ? $"{Number}" : $"{Name}.{Number}" : Name),
                 "l" => (Number.HasValue ? FormatLegacy(GetLegacyName(), Number.Value.ToString()) : FormatLegacy(GetLegacyName())),
                 _ => throw new ArgumentException("Unknown format", nameof(format))
             };
         }
 
         private string FormatLegacy(string tag, string number = "")
         {
-            var tagEndsWithANumber = char.IsNumber(tag.Last());
+            var tagEndsWithANumber = char.IsNumber(tag.LastOrDefault());
             if (tagEndsWithANumber && number.Length > 0)
                 number = "-" + number;
 
@@ -188,13 +190,17 @@ private string FormatLegacy(string tag, string number = "")
 
         private string GetLegacyName()
         {
+            if (string.IsNullOrEmpty(Name))
+            {
+                return string.Empty;
+            }
             var firstPart = Name.Split('_')[0];
             return firstPart.Replace(".", string.Empty);
         }
 
         public bool HasTag()
         {
-            return !string.IsNullOrEmpty(Name);
+            return !string.IsNullOrEmpty(Name) || (Number.HasValue && !PromotedFromCommits);
         }
     }
 }

src/GitVersionCore/VersionCalculation/VariableProvider.cs

@@ -116,6 +116,7 @@ private static void PromoteNumberOfCommitsToTagNumber(SemanticVersion semanticVe
                 else
                 {
                     semanticVersion.PreReleaseTag.Number = semanticVersion.BuildMetaData.CommitsSinceTag;
+                    semanticVersion.PreReleaseTag.PromotedFromCommits = true;
                 }
                 semanticVersion.BuildMetaData.CommitsSinceVersionSource = semanticVersion.BuildMetaData.CommitsSinceTag.Value;
                 semanticVersion.BuildMetaData.CommitsSinceTag = null; // why is this set to null ?