Address build warnings from .NET 8 analyzers

src/LibraryManager.Contracts/CompletionSet.cs

@@ -140,8 +140,13 @@ public bool Equals(CompletionItem other)
         /// </summary>
         public override int GetHashCode()
         {
+#if NET8_0_OR_GREATER
+            return HashCode.Combine(InsertionText, Description);
+#else
             // Much of the time, InsertionText == DisplayText, so XORing those would just cancel out.
+            // So don't include DisplayText in the hash code.
             return InsertionText.GetHashCode() ^ Description.GetHashCode();
+#endif
         }
 
         /// <summary>

src/LibraryManager/Cache/CacheFileMetadata.cs

@@ -46,7 +46,11 @@ public override bool Equals(object obj)
         /// <inheritdoc />
         public override int GetHashCode()
         {
+#if NET8_0_OR_GREATER
+            return DestinationPath.GetHashCode(StringComparison.Ordinal); // this should be a unique identifier
+#else
             return DestinationPath.GetHashCode(); // this should be a unique identifier
+#endif
         }
     }
 }

src/LibraryManager/FileIdentifier.cs

@@ -2,7 +2,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 
 using System;
-using System.Collections.Generic;
 
 namespace Microsoft.Web.LibraryManager
 {
@@ -35,10 +34,14 @@ public override bool Equals(object obj)
 
         public override int GetHashCode()
         {
+#if NET8_0_OR_GREATER
+            return HashCode.Combine(Path, Version);
+#else
             int hashPath = Path == null ? 0 : Path.GetHashCode();
             int hashVersion = Version == null ? 0 : Version.GetHashCode();
 
             return hashPath ^ hashVersion;
+#endif
         }
     }
 }

src/LibraryManager/Minimatch/Minimatcher.cs

@@ -825,7 +825,13 @@ private bool Match(string input, bool partial)
             // On other platforms, \ is a valid (albeit bad) filename char.
 
             if (options.AllowWindowsPaths)
+            {
+#if NET8_0_OR_GREATER
+                input = input.Replace("\\", "/", StringComparison.Ordinal);
+#else
                 input = input.Replace("\\", "/");
+#endif
+            }
 
             // treat the test path as a set of pathparts.
             var f = slashSplit.Split(input);

src/LibraryManager/Providers/BaseProvider.cs

@@ -395,7 +395,8 @@ protected virtual string GetCachedFileLocalPath(ILibraryInstallationState state,
         /// <summary>
         /// Copies ILibraryInstallationState files to cache
         /// </summary>
-        /// <param name="state"></param>
+        /// <param name="state">Desired install state to cache</param>
+        /// <param name="library">Library resolved from provider</param>
         /// <param name="cancellationToken"></param>
         /// <returns></returns>
         private async Task<ILibraryOperationResult> RefreshCacheAsync(ILibraryInstallationState state, ILibrary library, CancellationToken cancellationToken)

src/LibraryManager/Providers/Cdnjs/CdnjsCatalog.cs

@@ -50,7 +50,11 @@ public async Task<CompletionSet> GetLibraryCompletionSetAsync(string value, int
                 Length = value.Length
             };
 
+#if NET8_0_OR_GREATER
+            int at = value.IndexOf('@', StringComparison.Ordinal);
+#else
             int at = value.IndexOf('@');
+#endif
             string name = at > -1 ? value.Substring(0, at) : value;
 
             var completions = new List<CompletionItem>();

src/LibraryManager/Providers/FileSystem/FileSystemCatalog.cs

@@ -3,6 +3,7 @@
 
 using System;
 using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
 using System.IO;
 using System.Linq;
 using System.Threading;
@@ -37,6 +38,7 @@ public FileSystemCatalog(FileSystemProvider provider, bool underTest = false)
         /// <param name="value">The current state of the library ID.</param>
         /// <param name="caretPosition">The caret position inside the <paramref name="value" />.</param>
         /// <returns></returns>
+        [SuppressMessage("Globalization", "CA1307:Specify StringComparison for clarity", Justification = "Searching for characters which are not cased")]
         public Task<CompletionSet> GetLibraryCompletionSetAsync(string value, int caretPosition)
         {
             if (value.Contains("://"))
@@ -122,6 +124,7 @@ public Task<CompletionSet> GetLibraryCompletionSetAsync(string value, int caretP
         /// <returns>
         /// An instance of <see cref="Microsoft.Web.LibraryManager.Contracts.ILibraryGroup" /> or <code>null</code>.
         /// </returns>
+        [SuppressMessage("Globalization", "CA1307:Specify StringComparison for clarity", Justification = "Searching for characters which are not cased")]
         public async Task<ILibrary> GetLibraryAsync(string libraryName, string version, CancellationToken cancellationToken)
         {
             ILibrary library;

src/LibraryManager/Providers/jsDelivr/JsDelivrCatalog.cs

@@ -3,6 +3,7 @@
 
 using System;
 using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
 using System.IO;
 using System.Linq;
 using System.Threading;
@@ -343,6 +344,7 @@ private async Task<IEnumerable<string>> GetGithubLibraryVersionsAsync(string nam
             return versions;
         }
 
+        [SuppressMessage("Globalization", "CA1307:Specify StringComparison for clarity", Justification = "Searching for characters which are not cased")]
         public static bool IsGitHub(string libraryId)
         {
             if (libraryId == null || libraryId.StartsWith("@", StringComparison.Ordinal))

src/LibraryManager/RelativePathEqualityComparer.cs

@@ -1,6 +1,7 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System;
 using System.Collections.Generic;
 using System.IO;
 
@@ -37,7 +38,11 @@ public bool Equals(string x, string y)
         /// <inheritdoc />
         public int GetHashCode(string obj)
         {
+#if NET8_0_OR_GREATER
+            return NormalizePath(obj)?.GetHashCode(StringComparison.Ordinal) ?? 0;
+#else
             return NormalizePath(obj)?.GetHashCode() ?? 0;
+#endif
         }
 
         private string NormalizePath(string path)

src/LibraryManager/SemanticVersion.cs

@@ -44,7 +44,11 @@ public class SemanticVersion : IComparable<SemanticVersion>, IEquatable<Semantic
 
         private SemanticVersion(string originalText)
         {
+#if NET8_0_OR_GREATER
+            _hashCode = originalText?.GetHashCode(StringComparison.Ordinal) ?? 0;
+#else
             _hashCode = originalText?.GetHashCode() ?? 0;
+#endif
             OriginalText = originalText;
         }
 
@@ -57,8 +61,13 @@ internal static SemanticVersion Parse(string value)
                 return ver;
             }
 
+#if NET8_0_OR_GREATER
+            int prereleaseStart = value.IndexOf('-', StringComparison.Ordinal);
+            int buildMetadataStart = value.IndexOf('+', StringComparison.Ordinal);
+#else
             int prereleaseStart = value.IndexOf('-');
             int buildMetadataStart = value.IndexOf('+');
+#endif
 
             //If the index of the build metadata marker (+) is greater than the index of the prerelease marker (-)
             //  then it is necessarily found in the string because if both were not found they'd be equal
@@ -197,7 +206,7 @@ public int CompareTo(SemanticVersion other)
         }
 
         /// <summary>
-        /// Returns whether the semantic verisons are equal.  This includes comparing the build metadata, and does not provide semantic equivalence.
+        /// Returns whether the semantic versions are equal.  This includes comparing the build metadata, and does not provide semantic equivalence.
         /// </summary>
         public bool Equals(SemanticVersion other)
         {