Support floating prerelease and stable packages at the same time with the same version range (enable absolute latest scenario) (*-*)

src/NuGet.Core/NuGet.Versioning/FloatRange.cs

@@ -99,7 +99,37 @@ public bool Satisfies(NuGetVersion version)
             if (_minVersion != null)
             {
                 // everything beyond this point requires a version
-                if (_floatBehavior == NuGetVersionFloatBehavior.Prerelease)
+                if (_floatBehavior == NuGetVersionFloatBehavior.PrereleaseRevision)
+                {
+                    // allow the stable version to match
+                    return _minVersion.Major == version.Major
+                       && _minVersion.Minor == version.Minor
+                       && _minVersion.Patch == version.Patch
+                       && ((version.IsPrerelease && version.Release.StartsWith(_releasePrefix, StringComparison.OrdinalIgnoreCase))
+                           || !version.IsPrerelease);
+                }
+                else if (_floatBehavior == NuGetVersionFloatBehavior.PrereleasePatch)
+                {
+                    // allow the stable version to match
+                    return _minVersion.Major == version.Major
+                       && _minVersion.Minor == version.Minor
+                       && ((version.IsPrerelease && version.Release.StartsWith(_releasePrefix, StringComparison.OrdinalIgnoreCase))
+                           || !version.IsPrerelease);
+                }
+                else if (FloatBehavior == NuGetVersionFloatBehavior.PrereleaseMinor)
+                {
+                    // allow the stable version to match
+                    return _minVersion.Major == version.Major
+                       && ((version.IsPrerelease && version.Release.StartsWith(_releasePrefix, StringComparison.OrdinalIgnoreCase))
+                           || !version.IsPrerelease);
+                }
+                else if (FloatBehavior == NuGetVersionFloatBehavior.PrereleaseMajor)
+                {
+                    // allow the stable version to match
+                    return (version.IsPrerelease && version.Release.StartsWith(_releasePrefix, StringComparison.OrdinalIgnoreCase))
+                           || !version.IsPrerelease;
+                }
+                else if (_floatBehavior == NuGetVersionFloatBehavior.Prerelease)
                 {
                     // allow the stable version to match
                     return VersionComparer.Version.Equals(_minVersion, version)
@@ -134,9 +164,7 @@ public bool Satisfies(NuGetVersion version)
         /// </summary>
         public static FloatRange Parse(string versionString)
         {
-            FloatRange range = null;
-
-            TryParse(versionString, out range);
+            TryParse(versionString, out FloatRange range);
 
             return range;
         }
@@ -148,25 +176,79 @@ public static bool TryParse(string versionString, out FloatRange range)
         {
             range = null;
 
-            if (versionString != null)
+            if (versionString != null && !string.IsNullOrWhiteSpace(versionString))
             {
-                var starPos = versionString.IndexOf('*');
-
-                var actualVersion = versionString;
+                var firstStarPosition = versionString.IndexOf('*');
+                var lastStarPosition = versionString.LastIndexOf('*');
                 string releasePrefix = null;
 
                 if (versionString.Length == 1
-                    && starPos == 0)
+                    && firstStarPosition == 0)
                 {
                     range = new FloatRange(NuGetVersionFloatBehavior.Major, new NuGetVersion(new Version(0, 0)));
                 }
-                // * must appear as the last char in the string. 
+                else if (versionString.Equals("*-*"))
+                {
+                    range = new FloatRange(NuGetVersionFloatBehavior.AbsoluteLatest, new NuGetVersion("0.0.0-0"), releasePrefix: string.Empty);
+                }
+                else if (firstStarPosition != lastStarPosition && lastStarPosition != -1 && versionString.IndexOf('+') == -1)
+                {
+                    var behavior = NuGetVersionFloatBehavior.None;
+                    // 2 *s are only allowed in prerelease versions.
+                    var dashPosition = versionString.IndexOf('-');
+                    string actualVersion = null;
+
+                    if (dashPosition != -1 &&
+                        lastStarPosition == versionString.Length - 1 && // Last star is at the end of the full string
+                        firstStarPosition == (dashPosition-1) // First star is right before the first dash.
+                        )
+                    {
+                        // Get the stable part.
+                        var stablePart = versionString.Substring(0, dashPosition - 1); // Get the part without the *
+                        stablePart += "0";
+                        var versionParts = stablePart.Split('.').Length;
+                        switch (versionParts)
+                        {
+                            case 1:
+                                behavior = NuGetVersionFloatBehavior.PrereleaseMajor;
+                                break;
+                            case 2:
+                                behavior = NuGetVersionFloatBehavior.PrereleaseMinor;
+                                break;
+                            case 3:
+                                behavior = NuGetVersionFloatBehavior.PrereleasePatch;
+                                break;
+                            case 4:
+                                behavior = NuGetVersionFloatBehavior.PrereleaseRevision;
+                                break;
+                            default:
+                                break;
+                        }
+
+                        var releaseVersion = versionString.Substring(dashPosition + 1);
+                        releasePrefix = releaseVersion.Substring(0, releaseVersion.Length - 1);
+                        var releasePart = releasePrefix;
+                        if (releasePrefix.Length == 0 || releasePrefix.EndsWith("."))
+                        {
+                            // 1.0.0-* scenario, an empty label is not a valid version.
+                            releasePart += "0";
+                        }
+
+                        actualVersion = stablePart + "-" + releasePart;
+                    }
+
+                    if (NuGetVersion.TryParse(actualVersion, out NuGetVersion version))
+                    {
+                        range = new FloatRange(behavior, version, releasePrefix);
+                    }
+                }
+                // A single * can only appear as the last char in the string. 
                 // * cannot appear in the metadata section after the +
-                else if (starPos == versionString.Length - 1 && versionString.IndexOf('+') == -1)
+                else if (lastStarPosition == versionString.Length - 1 && versionString.IndexOf('+') == -1)
                 {
                     var behavior = NuGetVersionFloatBehavior.None;
 
-                    actualVersion = versionString.Substring(0, versionString.Length - 1);
+                    var actualVersion = versionString.Substring(0, versionString.Length - 1);
 
                     if (versionString.IndexOf('-') == -1)
                     {
@@ -214,7 +296,6 @@ public static bool TryParse(string versionString, out FloatRange range)
                     NuGetVersion version = null;
                     if (NuGetVersion.TryParse(actualVersion, out version))
                     {
-                        // there is no float range for this version
                         range = new FloatRange(behavior, version, releasePrefix);
                     }
                 }
@@ -259,9 +340,20 @@ public override string ToString()
                 case NuGetVersionFloatBehavior.Major:
                     result = "*";
                     break;
+                case NuGetVersionFloatBehavior.PrereleaseRevision:
+                    result = string.Format(CultureInfo.InvariantCulture, "{0}.{1}.{2}.*-{3}*", MinVersion.Major, MinVersion.Minor, MinVersion.Patch, _releasePrefix);
+                    break;
+                case NuGetVersionFloatBehavior.PrereleasePatch:
+                    result = string.Format(CultureInfo.InvariantCulture, "{0}.{1}.*-{2}*", MinVersion.Major, MinVersion.Minor, _releasePrefix);
+                    break;
+                case NuGetVersionFloatBehavior.PrereleaseMinor:
+                    result = string.Format(CultureInfo.InvariantCulture, "{0}.*-{1}*", MinVersion.Major, _releasePrefix);
+                    break;
+                case NuGetVersionFloatBehavior.PrereleaseMajor:
+                    result = string.Format(CultureInfo.InvariantCulture, "*-{1}*", MinVersion.Major, _releasePrefix);
+                    break;
                 case NuGetVersionFloatBehavior.AbsoluteLatest:
-                    // TODO: how should this be denoted?
-                    result = string.Empty;
+                    result = "*-*";
                     break;
                 default:
                     break;

src/NuGet.Core/NuGet.Versioning/NuGetVersionFloatBehavior.cs

@@ -1,4 +1,4 @@
-// Copyright (c) .NET Foundation. All rights reserved.
+// Copyright (c) .NET Foundation. All rights reserved.
 // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 
 namespace NuGet.Versioning
@@ -39,8 +39,29 @@ public enum NuGetVersionFloatBehavior
         Major,
 
         /// <summary>
-        /// Float major and pre-release
+        /// Float major and pre-release, *-*
         /// </summary>
-        AbsoluteLatest
+        AbsoluteLatest,
+
+        /// <summary>
+        /// Float revision and pre-release x.y.z.*-*
+        /// </summary>
+        PrereleaseRevision,
+
+        /// <summary>
+        /// Float patch and pre-release x.y.*-*
+        /// </summary>
+        PrereleasePatch,
+
+        /// <summary>
+        /// Float minor and pre-release x.*-*
+        /// </summary>
+        PrereleaseMinor,
+
+        /// <summary>
+        /// Float major and prerelease, but only with partial prerelease *-rc.*.
+        /// *-* is captured by <see cref="AbsoluteLatest"/>
+        /// </summary>
+        PrereleaseMajor,
     }
 }

src/NuGet.Core/NuGet.Versioning/VersionRange.cs

@@ -209,6 +209,10 @@ public bool IsBetter(NuGetVersion current, NuGetVersion considering)
             if (!HasPrereleaseBounds
                 && considering.IsPrerelease
                 && _floatRange?.FloatBehavior != NuGetVersionFloatBehavior.Prerelease
+                && _floatRange?.FloatBehavior != NuGetVersionFloatBehavior.PrereleaseMajor
+                && _floatRange?.FloatBehavior != NuGetVersionFloatBehavior.PrereleaseMinor
+                && _floatRange?.FloatBehavior != NuGetVersionFloatBehavior.PrereleasePatch
+                && _floatRange?.FloatBehavior != NuGetVersionFloatBehavior.PrereleaseRevision
                 && _floatRange?.FloatBehavior != NuGetVersionFloatBehavior.AbsoluteLatest)
             {
                 return false;

src/NuGet.Core/NuGet.Versioning/VersionRangeFactory.cs

@@ -70,7 +70,7 @@ public static VersionRange Parse(string value, bool allowFloating)
             if (!TryParse(value, allowFloating, out versionInfo))
             {
                 throw new ArgumentException(
-                    String.Format(CultureInfo.CurrentCulture,
+                    string.Format(CultureInfo.CurrentCulture,
                         Resources.Invalidvalue, value));
             }
 
@@ -101,7 +101,7 @@ public static bool TryParse(string value, bool allowFloating, out VersionRange v
 
             var charArray = trimmedValue.ToCharArray();
 
-            // * is the only range below 3 chars
+            // * is the only 1 char range
             if (allowFloating
                 && charArray.Length == 1
                 && charArray[0] == '*')
@@ -195,7 +195,7 @@ public static bool TryParse(string value, bool allowFloating, out VersionRange v
                 minVersionString = trimmedValue;
             }
 
-            if (!String.IsNullOrWhiteSpace(minVersionString))
+            if (!string.IsNullOrWhiteSpace(minVersionString))
             {
                 // parse the min version string
                 if (allowFloating && minVersionString.Contains("*"))
@@ -224,7 +224,7 @@ public static bool TryParse(string value, bool allowFloating, out VersionRange v
             }
 
             // parse the max version string, the max cannot float
-            if (!String.IsNullOrWhiteSpace(maxVersionString))
+            if (!string.IsNullOrWhiteSpace(maxVersionString))
             {
                 if (!NuGetVersion.TryParse(maxVersionString, out maxVersion))
                 {

src/NuGet.Core/NuGet.Versioning/VersionRangeFormatter.cs

@@ -159,7 +159,6 @@ private string GetShortString(VersionRange range)
         /// </summary>
         private string GetNormalizedString(VersionRange range)
         {
-            // TODO: write out the float version
             var sb = new StringBuilder();
 
             sb.Append(range.HasLowerBound && range.IsMinInclusive ? '[' : '(');