Add semver stuff

BepInEx.Core/Bootstrap/BaseChainloader.cs

@@ -6,6 +6,7 @@ using System.Reflection;
 using System.Text;
 using System.Text.RegularExpressions;
 using BepInEx.Configuration;
+using BepInEx.Core;
 using BepInEx.Logging;
 using Mono.Cecil;
 
@@ -15,7 +16,7 @@ namespace BepInEx.Bootstrap
 	{
 		#region Contract
 
-		protected virtual string ConsoleTitle => $"BepInEx {typeof(Paths).Assembly.GetName().Version} - {Paths.ProcessName}";
+		protected virtual string ConsoleTitle => $"BepInEx {Paths.BepInExVersion} - {Paths.ProcessName}";
 
 		private bool _initialized = false;
 
@@ -159,7 +160,7 @@ namespace BepInEx.Bootstrap
 				var sortedPlugins = ModifyLoadOrder(plugins);
 
 				var invalidPlugins = new HashSet<string>();
-				var processedPlugins = new Dictionary<string, Version>();
+				var processedPlugins = new Dictionary<string, SemVersion>();
 				var loadedAssemblies = new Dictionary<string, Assembly>();
 
 				foreach (var plugin in sortedPlugins)
@@ -173,7 +174,7 @@ namespace BepInEx.Bootstrap
 
 						// If the dependency wasn't already processed, it's missing altogether
 						bool dependencyExists = processedPlugins.TryGetValue(dependency.DependencyGUID, out var pluginVersion);
-						if (!dependencyExists || pluginVersion < dependency.MinimumVersion)
+						if (!dependencyExists || (dependency.MinimumVersion != null && dependency.MinimumVersion > pluginVersion))
 						{
 							// If the dependency is hard, collect it into a list to show
 							if (IsHardDependency(dependency))
@@ -201,10 +202,8 @@ namespace BepInEx.Bootstrap
 
 					if (missingDependencies.Count != 0)
 					{
-						bool IsEmptyVersion(Version v) => v.Major == 0 && v.Minor == 0 && v.Build <= 0 && v.Revision <= 0;
-
 						string message = $@"Could not load [{plugin}] because it has missing dependencies: {
-								string.Join(", ", missingDependencies.Select(s => IsEmptyVersion(s.MinimumVersion) ? s.DependencyGUID : $"{s.DependencyGUID} (v{s.MinimumVersion} or newer)").ToArray())
+								string.Join(", ", missingDependencies.Select(s => s.MinimumVersion == null ? s.DependencyGUID : $"{s.DependencyGUID} (v{s.MinimumVersion} or newer)").ToArray())
 							}";
 						DependencyErrors.Add(message);
 						Logger.LogError(message);

BepInEx.Core/Contract/Attributes.cs

@@ -3,6 +3,7 @@ using System.Collections.Generic;
 using System.IO;
 using System.Linq;
 using BepInEx.Bootstrap;
+using BepInEx.Core;
 using Mono.Cecil;
 
 namespace BepInEx
@@ -30,7 +31,7 @@ namespace BepInEx
 		/// <summary>
 		/// The specfic version of the plugin.
 		/// </summary>
-		public Version Version { get; protected set; }
+		public SemVersion Version { get; protected set; }
 
 		/// <param name="GUID">The unique identifier of the plugin. Should not change between plugin versions.</param>
 		/// <param name="Name">The user friendly name of the plugin. Is able to be changed between versions.</param>
@@ -42,7 +43,7 @@ namespace BepInEx
 
 			try
 			{
-				this.Version = new Version(Version);
+				this.Version = SemVersion.Parse(Version);
 			}
 			catch
 			{
@@ -97,7 +98,7 @@ namespace BepInEx
 		/// <summary>
 		/// The minimum version of the referenced plugin.
 		/// </summary>
-		public Version MinimumVersion { get; protected set; }
+		public SemVersion MinimumVersion { get; protected set; }
 
 		/// <summary>
 		/// Marks this <see cref="BaseUnityPlugin"/> as depenant on another plugin. The other plugin will be loaded before this one.
@@ -109,7 +110,7 @@ namespace BepInEx
 		{
 			this.DependencyGUID = DependencyGUID;
 			this.Flags = Flags;
-			MinimumVersion = new Version();
+			MinimumVersion = null;
 		}
 
 		/// <summary>
@@ -121,7 +122,7 @@ namespace BepInEx
 		/// <remarks>When version is supplied the dependency is always treated as HardDependency</remarks>
 		public BepInDependency(string DependencyGUID, string MinimumDependencyVersion) : this(DependencyGUID)
 		{
-			MinimumVersion = new Version(MinimumDependencyVersion);
+			MinimumVersion = SemVersion.Parse(MinimumDependencyVersion);
 		}
 
 		internal static IEnumerable<BepInDependency> FromCecilType(TypeDefinition td)
@@ -147,7 +148,7 @@ namespace BepInEx
 		{
 			DependencyGUID = br.ReadString();
 			Flags = (DependencyFlags)br.ReadInt32();
-			MinimumVersion = new Version(br.ReadString());
+			MinimumVersion = SemVersion.Parse(br.ReadString());
 		}
 	}
 

BepInEx.Core/Paths.cs

@@ -1,5 +1,6 @@
 using System.IO;
 using System.Reflection;
+using BepInEx.Core;
 using MonoMod.Utils;
 
 namespace BepInEx
@@ -33,6 +34,8 @@ namespace BepInEx
 			PluginPath = Utility.CombinePaths(BepInExRootPath, pluginPath);
 		}
 
+		public static SemVersion BepInExVersion { get; } = SemVersion.Parse(typeof(Paths).Assembly.GetCustomAttribute<AssemblyInformationalVersionAttribute>().InformationalVersion);
+
 		/// <summary>
 		///     The directory that the core BepInEx DLLs reside in.
 		/// </summary>

BepInEx.Core/SemVersion.cs

@@ -0,0 +1,616 @@
+// Backported to net35 from https://github.com/maxhauser/semver
+
+using System;
+using System.Globalization;
+using System.Runtime.Serialization;
+using System.Security.Permissions;
+using System.Text;
+using System.Text.RegularExpressions;
+
+namespace BepInEx.Core
+{
+	internal static class IntExtensions
+	{
+		/// <summary>
+		/// The number of digits in a non-negative number. Returns 1 for all
+		/// negative numbers. That is ok because we are using it to calculate
+		/// string length for a <see cref="StringBuilder"/> for numbers that
+		/// aren't supposed to be negative, but when they are it is just a little
+		/// slower.
+		/// </summary>
+		/// <remarks>
+		/// This approach is based on https://stackoverflow.com/a/51099524/268898
+		/// where the poster offers performance benchmarks showing this is the
+		/// fastest way to get a number of digits.
+		/// </remarks>
+		public static int Digits(this int n)
+		{
+			if (n < 10)
+				return 1;
+			if (n < 100)
+				return 2;
+			if (n < 1_000)
+				return 3;
+			if (n < 10_000)
+				return 4;
+			if (n < 100_000)
+				return 5;
+			if (n < 1_000_000)
+				return 6;
+			if (n < 10_000_000)
+				return 7;
+			if (n < 100_000_000)
+				return 8;
+			if (n < 1_000_000_000)
+				return 9;
+			return 10;
+		}
+	}
+
+	[Serializable]
+	public sealed class SemVersion : IComparable<SemVersion>, IComparable, ISerializable
+	{
+		private static readonly Regex ParseEx =
+			new Regex(@"^(?<major>\d+)" +
+					  @"(?>\.(?<minor>\d+))?" +
+					  @"(?>\.(?<patch>\d+))?" +
+					  @"(?>\-(?<pre>[0-9A-Za-z\-\.]+))?" +
+					  @"(?>\+(?<build>[0-9A-Za-z\-\.]+))?$",
+				RegexOptions.CultureInvariant | RegexOptions.Compiled | RegexOptions.ExplicitCapture,
+				TimeSpan.FromSeconds(0.5));
+
+#pragma warning disable CA1801 // Parameter unused
+		/// <summary>
+		/// Deserialize a <see cref="SemVersion"/>.
+		/// </summary>
+		/// <exception cref="ArgumentNullException">The <paramref name="info"/> parameter is null.</exception>
+		private SemVersion(SerializationInfo info, StreamingContext context)
+#pragma warning restore CA1801 // Parameter unused
+		{
+			if (info == null)
+				throw new ArgumentNullException(nameof(info));
+			var semVersion = Parse(info.GetString("SemVersion"));
+			Major = semVersion.Major;
+			Minor = semVersion.Minor;
+			Patch = semVersion.Patch;
+			Prerelease = semVersion.Prerelease;
+			Build = semVersion.Build;
+		}
+
+		/// <summary>
+		/// Constructs a new instance of the <see cref="SemVersion" /> class.
+		/// </summary>
+		/// <param name="major">The major version.</param>
+		/// <param name="minor">The minor version.</param>
+		/// <param name="patch">The patch version.</param>
+		/// <param name="prerelease">The prerelease version (e.g. "alpha").</param>
+		/// <param name="build">The build metadata (e.g. "nightly.232").</param>
+		public SemVersion(int major, int minor = 0, int patch = 0, string prerelease = "", string build = "")
+		{
+			Major = major;
+			Minor = minor;
+			Patch = patch;
+
+			Prerelease = prerelease ?? "";
+			Build = build ?? "";
+		}
+
+		/// <summary>
+		/// Constructs a new instance of the <see cref="SemVersion"/> class from
+		/// a <see cref="System.Version"/>.
+		/// </summary>
+		/// <param name="version">The <see cref="Version"/> that is used to initialize
+		/// the Major, Minor, Patch and Build.</param>
+		/// <returns>A <see cref="SemVersion"/> with the same Major and Minor version.
+		/// The Patch version will be the fourth part of the version number. The
+		/// build meta data will contain the third part of the version number if
+		/// it is greater than zero.</returns>
+		public SemVersion(Version version)
+		{
+			if (version == null)
+				throw new ArgumentNullException(nameof(version));
+
+			Major = version.Major;
+			Minor = version.Minor;
+
+			if (version.Revision >= 0)
+				Patch = version.Revision;
+
+			Prerelease = "";
+
+			Build = version.Build > 0 ? version.Build.ToString(CultureInfo.InvariantCulture) : "";
+		}
+
+		/// <summary>
+		/// Converts the string representation of a semantic version to its <see cref="SemVersion"/> equivalent.
+		/// </summary>
+		/// <param name="version">The version string.</param>
+		/// <param name="strict">If set to <see langword="true"/> minor and patch version are required,
+		/// otherwise they are optional.</param>
+		/// <returns>The <see cref="SemVersion"/> object.</returns>
+		/// <exception cref="ArgumentNullException">The <paramref name="version"/> is <see langword="null"/>.</exception>
+		/// <exception cref="ArgumentException">The <paramref name="version"/> has an invalid format.</exception>
+		/// <exception cref="InvalidOperationException">The <paramref name="version"/> is missing Minor or Patch versions and <paramref name="strict"/> is <see langword="true"/>.</exception>
+		/// <exception cref="OverflowException">The Major, Minor, or Patch versions are larger than <code>int.MaxValue</code>.</exception>
+		public static SemVersion Parse(string version, bool strict = false)
+		{
+			var match = ParseEx.Match(version);
+			if (!match.Success)
+				throw new ArgumentException($"Invalid version '{version}'.", nameof(version));
+
+			var major = int.Parse(match.Groups["major"].Value, CultureInfo.InvariantCulture);
+
+			var minorMatch = match.Groups["minor"];
+			int minor = 0;
+			if (minorMatch.Success)
+				minor = int.Parse(minorMatch.Value, CultureInfo.InvariantCulture);
+			else if (strict)
+				throw new InvalidOperationException("Invalid version (no minor version given in strict mode)");
+
+			var patchMatch = match.Groups["patch"];
+			int patch = 0;
+			if (patchMatch.Success)
+				patch = int.Parse(patchMatch.Value, CultureInfo.InvariantCulture);
+			else if (strict)
+				throw new InvalidOperationException("Invalid version (no patch version given in strict mode)");
+
+			var prerelease = match.Groups["pre"].Value;
+			var build = match.Groups["build"].Value;
+
+			return new SemVersion(major, minor, patch, prerelease, build);
+		}
+
+		/// <summary>
+		/// Converts the string representation of a semantic version to its <see cref="SemVersion"/>
+		/// equivalent and returns a value that indicates whether the conversion succeeded.
+		/// </summary>
+		/// <param name="version">The version string.</param>
+		/// <param name="semver">When the method returns, contains a <see cref="SemVersion"/> instance equivalent
+		/// to the version string passed in, if the version string was valid, or <see langword="null"/> if the
+		/// version string was not valid.</param>
+		/// <param name="strict">If set to <see langword="true"/> minor and patch version are required,
+		/// otherwise they are optional.</param>
+		/// <returns><see langword="false"/> when a invalid version string is passed, otherwise <see langword="true"/>.</returns>
+		public static bool TryParse(string version, out SemVersion semver, bool strict = false)
+		{
+			semver = null;
+			if (version is null)
+				return false;
+
+			var match = ParseEx.Match(version);
+			if (!match.Success)
+				return false;
+
+			if (!int.TryParse(match.Groups["major"].Value, NumberStyles.Integer, CultureInfo.InvariantCulture, out var major))
+				return false;
+
+			var minorMatch = match.Groups["minor"];
+			int minor = 0;
+			if (minorMatch.Success)
+			{
+				if (!int.TryParse(minorMatch.Value, NumberStyles.Integer, CultureInfo.InvariantCulture, out minor))
+					return false;
+			}
+			else if (strict)
+				return false;
+
+			var patchMatch = match.Groups["patch"];
+			int patch = 0;
+			if (patchMatch.Success)
+			{
+				if (!int.TryParse(patchMatch.Value, NumberStyles.Integer, CultureInfo.InvariantCulture, out patch))
+					return false;
+			}
+			else if (strict)
+				return false;
+
+			var prerelease = match.Groups["pre"].Value;
+			var build = match.Groups["build"].Value;
+
+			semver = new SemVersion(major, minor, patch, prerelease, build);
+			return true;
+		}
+
+		/// <summary>
+		/// Checks whether two semantic versions are equal.
+		/// </summary>
+		/// <param name="versionA">The first version to compare.</param>
+		/// <param name="versionB">The second version to compare.</param>
+		/// <returns><see langword="true"/> if the two values are equal, otherwise <see langword="false"/>.</returns>
+		public static bool Equals(SemVersion versionA, SemVersion versionB)
+		{
+			if (ReferenceEquals(versionA, versionB))
+				return true;
+			if (versionA is null || versionB is null)
+				return false;
+			return versionA.Equals(versionB);
+		}
+
+		/// <summary>
+		/// Compares the specified versions.
+		/// </summary>
+		/// <param name="versionA">The first version to compare.</param>
+		/// <param name="versionB">The second version to compare.</param>
+		/// <returns>A signed number indicating the relative values of <paramref name="versionA"/> and <paramref name="versionB"/>.</returns>
+		public static int Compare(SemVersion versionA, SemVersion versionB)
+		{
+			if (ReferenceEquals(versionA, versionB))
+				return 0;
+			if (versionA is null)
+				return -1;
+			if (versionB is null)
+				return 1;
+			return versionA.CompareTo(versionB);
+		}
+
+		/// <summary>
+		/// Make a copy of the current instance with changed properties.
+		/// </summary>
+		/// <param name="major">The value to replace the major version or <see langword="null"/> to leave it unchanged.</param>
+		/// <param name="minor">The value to replace the minor version or <see langword="null"/> to leave it unchanged.</param>
+		/// <param name="patch">The value to replace the patch version or <see langword="null"/> to leave it unchanged.</param>
+		/// <param name="prerelease">The value to replace the prerelease version or <see langword="null"/> to leave it unchanged.</param>
+		/// <param name="build">The value to replace the build metadata or <see langword="null"/> to leave it unchanged.</param>
+		/// <returns>The new version object.</returns>
+		/// <remarks>
+		/// The change method is intended to be called using named argument syntax, passing only
+		/// those fields to be changed.
+		/// </remarks>
+		/// <example>
+		/// To change only the patch version:
+		/// <code>version.Change(patch: 4)</code>
+		/// </example>
+		public SemVersion Change(int? major = null, int? minor = null, int? patch = null,
+			string prerelease = null, string build = null)
+		{
+			return new SemVersion(
+				major ?? Major,
+				minor ?? Minor,
+				patch ?? Patch,
+				prerelease ?? Prerelease,
+				build ?? Build);
+		}
+
+		/// <summary>
+		/// Gets the major version.
+		/// </summary>
+		/// <value>
+		/// The major version.
+		/// </value>
+		public int Major { get; }
+
+		/// <summary>
+		/// Gets the minor version.
+		/// </summary>
+		/// <value>
+		/// The minor version.
+		/// </value>
+		public int Minor { get; }
+
+		/// <summary>
+		/// Gets the patch version.
+		/// </summary>
+		/// <value>
+		/// The patch version.
+		/// </value>
+		public int Patch { get; }
+
+		/// <summary>
+		/// Gets the prerelease version.
+		/// </summary>
+		/// <value>
+		/// The prerelease version. Empty string if this is a release version.
+		/// </value>
+		public string Prerelease { get; }
+
+		/// <summary>
+		/// Gets the build metadata.
+		/// </summary>
+		/// <value>
+		/// The build metadata. Empty string if there is no build metadata.
+		/// </value>
+		public string Build { get; }
+
+		/// <summary>
+		/// Returns the <see cref="string" /> equivalent of this version.
+		/// </summary>
+		/// <returns>
+		/// The <see cref="string" /> equivalent of this version.
+		/// </returns>
+		public override string ToString()
+		{
+			// Assume all separators ("..-+"), at most 2 extra chars
+			var estimatedLength = 4 + Major.Digits() + Minor.Digits() + Patch.Digits()
+								  + Prerelease.Length + Build.Length;
+			var version = new StringBuilder(estimatedLength);
+			version.Append(Major);
+			version.Append('.');
+			version.Append(Minor);
+			version.Append('.');
+			version.Append(Patch);
+			if (Prerelease.Length > 0)
+			{
+				version.Append('-');
+				version.Append(Prerelease);
+			}
+
+			if (Build.Length > 0)
+			{
+				version.Append('+');
+				version.Append(Build);
+			}
+
+			return version.ToString();
+		}
+
+		/// <summary>
+		/// Compares the current instance with another object of the same type and returns an integer that indicates
+		/// whether the current instance precedes, follows, or occurs in the same position in the sort order as the
+		/// other object.
+		/// </summary>
+		/// <param name="obj">An object to compare with this instance.</param>
+		/// <returns>
+		/// A value that indicates the relative order of the objects being compared.
+		/// The return value has these meanings:
+		///  Less than zero: This instance precedes <paramref name="obj" /> in the sort order.
+		///  Zero: This instance occurs in the same position in the sort order as <paramref name="obj" />.
+		///  Greater than zero: This instance follows <paramref name="obj" /> in the sort order.
+		/// </returns>
+		/// <exception cref="InvalidCastException">The <paramref name="obj"/> is not a <see cref="SemVersion"/>.</exception>
+		public int CompareTo(object obj)
+		{
+			return CompareTo((SemVersion)obj);
+		}
+
+		/// <summary>
+		/// Compares the current instance with another object of the same type and returns an integer that indicates
+		/// whether the current instance precedes, follows, or occurs in the same position in the sort order as the
+		/// other object.
+		/// </summary>
+		/// <param name="other">An object to compare with this instance.</param>
+		/// <returns>
+		/// A value that indicates the relative order of the objects being compared.
+		/// The return value has these meanings:
+		///  Less than zero: This instance precedes <paramref name="other" /> in the sort order.
+		///  Zero: This instance occurs in the same position in the sort order as <paramref name="other" />.
+		///  Greater than zero: This instance follows <paramref name="other" /> in the sort order.
+		/// </returns>
+		public int CompareTo(SemVersion other)
+		{
+			var r = CompareByPrecedence(other);
+			if (r != 0)
+				return r;
+
+#pragma warning disable CA1062 // Validate arguments of public methods
+			// If other is null, CompareByPrecedence() returns 1
+			return CompareComponent(Build, other.Build);
+#pragma warning restore CA1062 // Validate arguments of public methods
+		}
+
+		/// <summary>
+		/// Returns whether two semantic versions have the same precedence. Versions
+		/// that differ only by build metadata have the same precedence.
+		/// </summary>
+		/// <param name="other">The semantic version to compare to.</param>
+		/// <returns><see langword="true"/> if the version precedences are equal.</returns>
+		public bool PrecedenceMatches(SemVersion other)
+		{
+			return CompareByPrecedence(other) == 0;
+		}
+
+		/// <summary>
+		/// Compares two semantic versions by precedence as defined in the SemVer spec. Versions
+		/// that differ only by build metadata have the same precedence.
+		/// </summary>
+		/// <param name="other">The semantic version.</param>
+		/// <returns>
+		/// A value that indicates the relative order of the objects being compared.
+		/// The return value has these meanings:
+		///  Less than zero: This instance precedes <paramref name="other" /> in the sort order.
+		///  Zero: This instance occurs in the same position in the sort order as <paramref name="other" />.
+		///  Greater than zero: This instance follows <paramref name="other" /> in the sort order.
+		/// </returns>
+		public int CompareByPrecedence(SemVersion other)
+		{
+			if (other is null)
+				return 1;
+
+			var r = Major.CompareTo(other.Major);
+			if (r != 0)
+				return r;
+
+			r = Minor.CompareTo(other.Minor);
+			if (r != 0)
+				return r;
+
+			r = Patch.CompareTo(other.Patch);
+			if (r != 0)
+				return r;
+
+			return CompareComponent(Prerelease, other.Prerelease, true);
+		}
+
+		private static int CompareComponent(string a, string b, bool nonemptyIsLower = false)
+		{
+			var aEmpty = string.IsNullOrEmpty(a);
+			var bEmpty = string.IsNullOrEmpty(b);
+			if (aEmpty && bEmpty)
+				return 0;
+
+			if (aEmpty)
+				return nonemptyIsLower ? 1 : -1;
+			if (bEmpty)
+				return nonemptyIsLower ? -1 : 1;
+
+			var aComps = a.Split('.');
+			var bComps = b.Split('.');
+
+			var minLen = Math.Min(aComps.Length, bComps.Length);
+			for (int i = 0; i < minLen; i++)
+			{
+				var ac = aComps[i];
+				var bc = bComps[i];
+				var aIsNum = int.TryParse(ac, out var aNum);
+				var bIsNum = int.TryParse(bc, out var bNum);
+				int r;
+				if (aIsNum && bIsNum)
+				{
+					r = aNum.CompareTo(bNum);
+					if (r != 0)
+						return r;
+				}
+				else
+				{
+					if (aIsNum)
+						return -1;
+					if (bIsNum)
+						return 1;
+					r = string.CompareOrdinal(ac, bc);
+					if (r != 0)
+						return r;
+				}
+			}
+
+			return aComps.Length.CompareTo(bComps.Length);
+		}
+
+		/// <summary>
+		/// Determines whether the specified <see cref="object" /> is equal to this instance.
+		/// </summary>
+		/// <param name="obj">The <see cref="object" /> to compare with this instance.</param>
+		/// <returns>
+		///   <see langword="true"/> if the specified <see cref="object" /> is equal to this instance, otherwise <see langword="false"/>.
+		/// </returns>
+		/// <exception cref="InvalidCastException">The <paramref name="obj"/> is not a <see cref="SemVersion"/>.</exception>
+		public override bool Equals(object obj)
+		{
+			if (obj is null)
+				return false;
+
+			if (ReferenceEquals(this, obj))
+				return true;
+
+			var other = (SemVersion)obj;
+
+			return Major == other.Major
+				   && Minor == other.Minor
+				   && Patch == other.Patch
+				   && string.Equals(Prerelease, other.Prerelease, StringComparison.Ordinal)
+				   && string.Equals(Build, other.Build, StringComparison.Ordinal);
+		}
+
+		/// <summary>
+		/// Returns a hash code for this instance.
+		/// </summary>
+		/// <returns>
+		/// A hash code for this instance, suitable for use in hashing algorithms and data structures like a hash table.
+		/// </returns>
+		public override int GetHashCode()
+		{
+			unchecked
+			{
+				// TODO verify this. Some versions start result = 17. Some use 37 instead of 31
+				int result = Major.GetHashCode();
+				result = result * 31 + Minor.GetHashCode();
+				result = result * 31 + Patch.GetHashCode();
+				result = result * 31 + Prerelease.GetHashCode();
+				result = result * 31 + Build.GetHashCode();
+				return result;
+			}
+		}
+
+		/// <summary>
+		/// Populates a <see cref="SerializationInfo"/> with the data needed to serialize the target object.
+		/// </summary>
+		/// <param name="info">The <see cref="SerializationInfo"/> to populate with data.</param>
+		/// <param name="context">The destination (see <see cref="SerializationInfo"/>) for this serialization.</param>
+		[SecurityPermission(SecurityAction.Demand, SerializationFormatter = true)]
+		public void GetObjectData(SerializationInfo info, StreamingContext context)
+		{
+			if (info == null)
+				throw new ArgumentNullException(nameof(info));
+			info.AddValue("SemVersion", ToString());
+		}
+
+#pragma warning disable CA2225 // Operator overloads have named alternates
+		/// <summary>
+		/// Implicit conversion from <see cref="string"/> to <see cref="SemVersion"/>.
+		/// </summary>
+		/// <param name="version">The semantic version.</param>
+		/// <returns>The <see cref="SemVersion"/> object.</returns>
+		/// <exception cref="ArgumentNullException">The <paramref name="version"/> is <see langword="null"/>.</exception>
+		/// <exception cref="ArgumentException">The version number has an invalid format.</exception>
+		/// <exception cref="OverflowException">The Major, Minor, or Patch versions are larger than <code>int.MaxValue</code>.</exception>
+		public static implicit operator SemVersion(string version)
+#pragma warning restore CA2225 // Operator overloads have named alternates
+		{
+			return Parse(version);
+		}
+
+		/// <summary>
+		/// Compares two semantic versions for equality.
+		/// </summary>
+		/// <param name="left">The left value.</param>
+		/// <param name="right">The right value.</param>
+		/// <returns>If left is equal to right <see langword="true"/>, otherwise <see langword="false"/>.</returns>
+		public static bool operator ==(SemVersion left, SemVersion right)
+		{
+			return Equals(left, right);
+		}
+
+		/// <summary>
+		/// Compares two semantic versions for inequality.
+		/// </summary>
+		/// <param name="left">The left value.</param>
+		/// <param name="right">The right value.</param>
+		/// <returns>If left is not equal to right <see langword="true"/>, otherwise <see langword="false"/>.</returns>
+		public static bool operator !=(SemVersion left, SemVersion right)
+		{
+			return !Equals(left, right);
+		}
+
+		/// <summary>
+		/// Compares two semantic versions.
+		/// </summary>
+		/// <param name="left">The left value.</param>
+		/// <param name="right">The right value.</param>
+		/// <returns>If left is greater than right <see langword="true"/>, otherwise <see langword="false"/>.</returns>
+		public static bool operator >(SemVersion left, SemVersion right)
+		{
+			return Compare(left, right) > 0;
+		}
+
+		/// <summary>
+		/// Compares two semantic versions.
+		/// </summary>
+		/// <param name="left">The left value.</param>
+		/// <param name="right">The right value.</param>
+		/// <returns>If left is greater than or equal to right <see langword="true"/>, otherwise <see langword="false"/>.</returns>
+		public static bool operator >=(SemVersion left, SemVersion right)
+		{
+			return Equals(left, right) || Compare(left, right) > 0;
+		}
+
+		/// <summary>
+		/// Compares two semantic versions.
+		/// </summary>
+		/// <param name="left">The left value.</param>
+		/// <param name="right">The right value.</param>
+		/// <returns>If left is less than right <see langword="true"/>, otherwise <see langword="false"/>.</returns>
+		public static bool operator <(SemVersion left, SemVersion right)
+		{
+			return Compare(left, right) < 0;
+		}
+
+		/// <summary>
+		/// Compares two semantic versions.
+		/// </summary>
+		/// <param name="left">The left value.</param>
+		/// <param name="right">The right value.</param>
+		/// <returns>If left is less than or equal to right <see langword="true"/>, otherwise <see langword="false"/>.</returns>
+		public static bool operator <=(SemVersion left, SemVersion right)
+		{
+			return Equals(left, right) || Compare(left, right) < 0;
+		}
+	}
+}

BepInEx.Preloader.Core/Logging/ChainloaderLogHelper.cs

@@ -9,7 +9,7 @@ namespace BepInEx.Preloader.Core.Logging
 	{
 		public static void PrintLogInfo(ManualLogSource log)
 		{
-			string consoleTitle = $"BepInEx {typeof(Paths).Assembly.GetName().Version} - {Paths.ProcessName}";
+			string consoleTitle = $"BepInEx {Paths.BepInExVersion} - {Paths.ProcessName}";
 			log.LogMessage(consoleTitle);
 
 			if (ConsoleManager.ConsoleActive)