Moved runtime abstractions and added SemVer + extensions to abstractions.

src/Umbraco.Core/VersionExtensions.cs

@@ -1,84 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using Semver;
-
-namespace Umbraco.Core
-{
-    internal static class VersionExtensions
-    {
-        public static Version GetVersion(this SemVersion semVersion, int maxParts = 4)
-        {
-            int build = 0;
-            int.TryParse(semVersion.Build, out build);
-
-            if (maxParts >= 4)
-            {
-                return new Version(semVersion.Major, semVersion.Minor, semVersion.Patch, build);
-            }
-            if (maxParts == 3)
-            {
-                return new Version(semVersion.Major, semVersion.Minor, semVersion.Patch);
-            }
-
-            return new Version(semVersion.Major, semVersion.Minor);
-        }
-
-        public static Version SubtractRevision(this Version version)
-        {
-            var parts = new List<int>(new[] {version.Major, version.Minor, version.Build, version.Revision});
-
-            //remove all prefixed zero parts
-            while (parts[0] <= 0)
-            {
-                parts.RemoveAt(0);
-                if (parts.Count == 0) break;
-            }
-
-            for (int index = 0; index < parts.Count; index++)
-            {
-                var part = parts[index];
-                if (part <= 0)
-                {
-                    parts.RemoveAt(index);
-                    index++;
-                }
-                else
-                {
-                    //break when there isn't a zero part
-                    break;
-                }
-            }
-
-            if (parts.Count == 0) throw new InvalidOperationException("Cannot subtract a revision from a zero version");
-
-            var lastNonZero = parts.FindLastIndex(i => i > 0);
-
-            //subtract 1 from the last non-zero
-            parts[lastNonZero] = parts[lastNonZero] - 1;
-
-            //the last non zero is actually the revision so we can just return
-            if (lastNonZero == (parts.Count -1))
-            {
-                return FromList(parts);
-            }
-
-            //the last non zero isn't the revision so the remaining zero's need to be replaced with int.max
-            for (var i = lastNonZero + 1; i < parts.Count; i++)
-            {
-                parts[i] = int.MaxValue;
-            }
-
-            return FromList(parts);
-        }
-
-        private static Version FromList(IList<int> parts)
-        {
-            while (parts.Count < 4)
-            {
-                parts.Insert(0, 0);
-            }
-            return new Version(parts[0], parts[1], parts[2], parts[3]);
-        }
-    }
-}