green: RepoWithHistory, EmptyRepo

.gitignore

@@ -0,0 +1,3 @@
+.vs/
+bin/
+obj/

MinVer.sln

@@ -0,0 +1,40 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 15
+VisualStudioVersion = 15.0.28010.2003
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "MinVerTests", "MinVerTests\MinVerTests.csproj", "{57307B80-9750-4D4F-91DC-EE28EC89EDDD}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "MinVer", "MinVer\MinVer.csproj", "{EE44EA11-CEBE-49C7-9F23-EE8AE6FDFCFB}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "targets", "targets\Targets.csproj", "{0F266E8B-E818-41A8-B93C-9E80E9446AC6}"
+EndProject
+Global
+ GlobalSection(SolutionConfigurationPlatforms) = preSolution
+ Debug|Any CPU = Debug|Any CPU
+ Release|Any CPU = Release|Any CPU
+ EndGlobalSection
+ GlobalSection(ProjectConfigurationPlatforms) = postSolution
+ {57307B80-9750-4D4F-91DC-EE28EC89EDDD}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+ {57307B80-9750-4D4F-91DC-EE28EC89EDDD}.Debug|Any CPU.Build.0 = Debug|Any CPU
+ {57307B80-9750-4D4F-91DC-EE28EC89EDDD}.Release|Any CPU.ActiveCfg = Release|Any CPU
+ {57307B80-9750-4D4F-91DC-EE28EC89EDDD}.Release|Any CPU.Build.0 = Release|Any CPU
+ {EE44EA11-CEBE-49C7-9F23-EE8AE6FDFCFB}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+ {EE44EA11-CEBE-49C7-9F23-EE8AE6FDFCFB}.Debug|Any CPU.Build.0 = Debug|Any CPU
+ {EE44EA11-CEBE-49C7-9F23-EE8AE6FDFCFB}.Release|Any CPU.ActiveCfg = Release|Any CPU
+ {EE44EA11-CEBE-49C7-9F23-EE8AE6FDFCFB}.Release|Any CPU.Build.0 = Release|Any CPU
+ {0F266E8B-E818-41A8-B93C-9E80E9446AC6}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+ {0F266E8B-E818-41A8-B93C-9E80E9446AC6}.Debug|Any CPU.Build.0 = Debug|Any CPU
+ {0F266E8B-E818-41A8-B93C-9E80E9446AC6}.Release|Any CPU.ActiveCfg = Release|Any CPU
+ {0F266E8B-E818-41A8-B93C-9E80E9446AC6}.Release|Any CPU.Build.0 = Release|Any CPU
+ EndGlobalSection
+ GlobalSection(SolutionProperties) = preSolution
+ HideSolutionNode = FALSE
+ EndGlobalSection
+ GlobalSection(ExtensibilityGlobals) = postSolution
+ SolutionGuid = {9A50D1D0-1F93-4845-829D-C33C590C82F4}
+ EndGlobalSection
+ GlobalSection(Performance) = preSolution
+ HasPerformanceSessions = true
+ EndGlobalSection
+EndGlobal

MinVer/MinVer.csproj

@@ -0,0 +1,13 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+ <PropertyGroup>
+ <LangVersion>latest</LangVersion>
+ <TargetFramework>netstandard2.0</TargetFramework>
+ </PropertyGroup>
+
+ <ItemGroup>
+ <PackageReference Include="LibGit2Sharp" Version="0.25.3" />
+ <PackageReference Include="Microsoft.CodeQuality.Analyzers" Version="2.6.2" PrivateAssets="All" />
+ </ItemGroup>
+
+</Project>

MinVer/Version.cs

@@ -0,0 +1,121 @@
+namespace MinVer
+{
+ using System;
+ using System.Collections.Generic;
+ using System.Globalization;
+ using System.Linq;
+ using static System.Math;
+
+#pragma warning disable CA1036 // Override methods on comparable types
+ public class Version : IComparable<Version>
+#pragma warning restore CA1036 // Override methods on comparable types
+ {
+ private readonly int major;
+ private readonly int minor;
+ private readonly int patch;
+ private readonly List<string> preReleaseIdentifiers;
+
+ public Version() => this.preReleaseIdentifiers = new List<string> { "alpha", "0" };
+
+ public Version(int major, int minor, int patch, IEnumerable<string> preReleaseIdentifiers)
+ {
+ this.major = major;
+ this.minor = minor;
+ this.patch = patch;
+ this.preReleaseIdentifiers = preReleaseIdentifiers?.ToList() ?? new List<string>();
+ }
+
+ public override string ToString() =>
+ $"{this.major}.{this.minor}.{this.patch}{(this.preReleaseIdentifiers.Count == 0 ? "" : $"-{string.Join(".", this.preReleaseIdentifiers)}")}";
+
+ public int CompareTo(Version other)
+ {
+ var major = this.major.CompareTo(other.major);
+ if (major != 0)
+ {
+ return major;
+ }
+
+ var minor = this.minor.CompareTo(other.minor);
+ if (minor != 0)
+ {
+ return minor;
+ }
+
+ var patch = this.patch.CompareTo(other.patch);
+ if (patch != 0)
+ {
+ return patch;
+ }
+
+ if (this.preReleaseIdentifiers.Count > 0 && other.preReleaseIdentifiers.Count == 0)
+ {
+ return -1;
+ }
+
+ if (this.preReleaseIdentifiers.Count == 0 && other.preReleaseIdentifiers.Count > 0)
+ {
+ return 1;
+ }
+
+ var maxCount = Max(this.preReleaseIdentifiers.Count, other.preReleaseIdentifiers.Count);
+ for (var index = 0; index < maxCount; ++index)
+ {
+ if (this.preReleaseIdentifiers.Count == index && other.preReleaseIdentifiers.Count > index)
+ {
+ return -1;
+ }
+
+ if (this.preReleaseIdentifiers.Count > index && other.preReleaseIdentifiers.Count == index)
+ {
+ return 1;
+ }
+
+ if (int.TryParse(this.preReleaseIdentifiers[index], out var thisNumber) && int.TryParse(other.preReleaseIdentifiers[index], out var otherNumber))
+ {
+ var number = thisNumber.CompareTo(otherNumber);
+ if (number != 0)
+ {
+ return number;
+ }
+ }
+ else
+ {
+ var text = string.CompareOrdinal(this.preReleaseIdentifiers[index], other.preReleaseIdentifiers[index]);
+ if (text != 0)
+ {
+ return text;
+ }
+ }
+ }
+
+ return 0;
+ }
+
+ public Version AddHeight(int height) =>
+ height == 0
+ ? new Version(this.major, this.minor, this.patch, this.preReleaseIdentifiers)
+ : this.preReleaseIdentifiers.Count == 0
+ ? new Version(this.major, this.minor + 1, 0, new[] { "alpha", "0", height.ToString(CultureInfo.InvariantCulture) })
+ : new Version(this.major, this.minor, this.patch, this.preReleaseIdentifiers.Concat(new[] { height.ToString(CultureInfo.InvariantCulture) }));
+
+ public static Version ParseOrDefault(string text)
+ {
+ if (text == default)
+ {
+ return null;
+ }
+
+ var numbersAndPreRelease = text.Split(new[] { '-' }, 2);
+ var numbers = numbersAndPreRelease[0].Split('.');
+
+ return
+ numbers.Length == 3 &&
+ int.TryParse(numbers[0], out var major) &&
+ int.TryParse(numbers[1], out var minor) &&
+ int.TryParse(numbers[2], out var patch)
+ ? new Version(major, minor, patch, numbersAndPreRelease.Length == 2 ? numbersAndPreRelease[1].Split('.') : null)
+ : null;
+ }
+ }
+}

MinVer/Versioner.cs

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+namespace MinVer
+{
+ using System.Linq;
+ using LibGit2Sharp;
+
+ public static class Versioner
+ {
+ public static Version GetVersion(string path)
+ {
+ using (var repo = new Repository(path))
+ {
+ return GetVersion(repo.Commits.FirstOrDefault(), 0, repo.Tags);
+ }
+ }
+
+ private static Version GetVersion(Commit commit, int height, TagCollection tags)
+ {
+ if (commit == default)
+ {
+ return new Version();
+ }
+
+ var version = GetVersionOrDefault(tags, commit);
+
+ if (version != default)
+ {
+ return version.AddHeight(height);
+ }
+
+ return commit.Parents
+ .Select(parent => GetVersion(parent, height + 1, tags))
+ .Where(_ => _ != default)
+ .OrderByDescending(_ => _)
+ .FirstOrDefault() ??
+ new Version().AddHeight(height);
+ }
+
+ private static Version GetVersionOrDefault(TagCollection tags, Commit commit) => tags
+ .Where(tag => tag.Target.Sha == commit.Sha)
+ .Select(tag => Version.ParseOrDefault(tag.FriendlyName))
+ .Where(_ => _ != default)
+ .OrderByDescending(_ => _)
+ .FirstOrDefault();
+ }
+}

MinVerTests/Infra/AssertFile.cs

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+namespace MinVerTests.Infra
+{
+ using System;
+ using System.IO;
+ using System.Threading.Tasks;
+
+ public static class AssertFile
+ {
+ public static async Task Contains(string expectedPath, string actual)
+ {
+ if (actual != await File.ReadAllTextAsync(expectedPath))
+ {
+ var actualPath = Path.Combine(
+ Path.GetDirectoryName(expectedPath),
+ Path.GetFileNameWithoutExtension(expectedPath) + "-actual" + Path.GetExtension(expectedPath));
+
+ await File.WriteAllTextAsync(actualPath, actual);
+
+ throw new Exception($"{actualPath} does not contain the contents of {expectedPath}.");
+ }
+ }
+ }
+}

MinVerTests/MinVerTests.csproj

@@ -0,0 +1,20 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+ <PropertyGroup>
+ <LangVersion>latest</LangVersion>
+ <TargetFramework>netcoreapp2.1</TargetFramework>
+ </PropertyGroup>
+
+ <ItemGroup>
+ <PackageReference Include="LibGit2Sharp" Version="0.25.3" />
+ <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.9.0" />
+ <PackageReference Include="SimpleExec" Version="3.0.0" />
+ <PackageReference Include="Xbehave" Version="2.4.0" />
+ <PackageReference Include="xunit.runner.visualstudio" Version="2.4.0" />
+ </ItemGroup>
+
+ <ItemGroup>
+ <ProjectReference Include="..\MinVer\MinVer.csproj" />
+ </ItemGroup>
+
+</Project>