[Mount Removal] Remove GitObjectsRoot and LocalCacheRoot from RepoMetadata.dat and switch to 'gvfs.sharedCache'

Scalar.Common/Http/CacheServerResolver.cs

@@ -33,7 +33,6 @@ public static string GetUrlFromConfig(Enlistment enlistment)
             // TODO 1057500: Remove support for encoded-repo-url cache config setting
             return
                 GetValueFromConfig(git, ScalarConstants.GitConfig.CacheServer, localOnly: true)
-                ?? GetValueFromConfig(git, GetDeprecatedCacheConfigSettingName(enlistment), localOnly: false)
                 ?? enlistment.RepoUrl;
         }
 
@@ -144,17 +143,6 @@ private static string GetValueFromConfig(GitProcess git, string configName, bool
             return value;
         }
 
-        private static string GetDeprecatedCacheConfigSettingName(Enlistment enlistment)
-        {
-            string sectionUrl =
-                enlistment.RepoUrl.ToLowerInvariant()
-                .Replace("https://", string.Empty)
-                .Replace("http://", string.Empty)
-                .Replace('/', '.');
-
-            return ScalarConstants.GitConfig.ScalarPrefix + sectionUrl + ScalarConstants.GitConfig.DeprecatedCacheEndpointSuffix;
-        }
-
         private CacheServerInfo CreateNone()
         {
             return new CacheServerInfo(this.enlistment.RepoUrl, CacheServerInfo.ReservedNames.None);

Scalar.Common/RepoMetadata.cs

@@ -130,61 +130,10 @@ public void SaveCloneMetadata(ITracer tracer, ScalarEnlistment enlistment)
                 {
                     new KeyValuePair<string, string>(Keys.DiskLayoutMajorVersion, ScalarPlatform.Instance.DiskLayoutUpgrade.Version.CurrentMajorVersion.ToString()),
                     new KeyValuePair<string, string>(Keys.DiskLayoutMinorVersion, ScalarPlatform.Instance.DiskLayoutUpgrade.Version.CurrentMinorVersion.ToString()),
-                    new KeyValuePair<string, string>(Keys.GitObjectsRoot, enlistment.GitObjectsRoot),
-                    new KeyValuePair<string, string>(Keys.LocalCacheRoot, enlistment.LocalCacheRoot),
                     new KeyValuePair<string, string>(Keys.EnlistmentId, CreateNewEnlistmentId(tracer)),
                 });
         }
 
-        public bool TryGetGitObjectsRoot(out string gitObjectsRoot, out string error)
-        {
-            gitObjectsRoot = null;
-
-            try
-            {
-                if (!this.repoMetadata.TryGetValue(Keys.GitObjectsRoot, out gitObjectsRoot))
-                {
-                    error = "Git objects root not found";
-                    return false;
-                }
-            }
-            catch (FileBasedCollectionException ex)
-            {
-                error = ex.Message;
-                return false;
-            }
-
-            error = null;
-            return true;
-        }
-
-        public void SetGitObjectsRoot(string gitObjectsRoot)
-        {
-            this.repoMetadata.SetValueAndFlush(Keys.GitObjectsRoot, gitObjectsRoot);
-        }
-
-        public bool TryGetLocalCacheRoot(out string localCacheRoot, out string error)
-        {
-            localCacheRoot = null;
-
-            try
-            {
-                if (!this.repoMetadata.TryGetValue(Keys.LocalCacheRoot, out localCacheRoot))
-                {
-                    error = "Local cache root not found";
-                    return false;
-                }
-            }
-            catch (FileBasedCollectionException ex)
-            {
-                error = ex.Message;
-                return false;
-            }
-
-            error = null;
-            return true;
-        }
-
         public void SetEntry(string keyName, string valueName)
         {
             this.repoMetadata.SetValueAndFlush(keyName, valueName);
@@ -203,8 +152,6 @@ public static class Keys
         {
             public const string DiskLayoutMajorVersion = "DiskLayoutVersion";
             public const string DiskLayoutMinorVersion = "DiskLayoutMinorVersion";
-            public const string GitObjectsRoot = "GitObjectsRoot";
-            public const string LocalCacheRoot = "LocalCacheRoot";
             public const string EnlistmentId = "EnlistmentId";
         }
     }

Scalar.Common/ScalarConstants.cs

@@ -30,8 +30,8 @@ public static class GitConfig
             public const string GitStatusCacheBackoffConfig = ScalarPrefix + "status-cache-backoff-seconds";
             public const string MountId = ScalarPrefix + "mount-id";
             public const string EnlistmentId = ScalarPrefix + "enlistment-id";
-            public const string CacheServer = ScalarPrefix + "cache-server";
-            public const string DeprecatedCacheEndpointSuffix = ".cache-server-url";
+            public const string CacheServer = "gvfs.cache-server";
+            public const string ObjectCache = "gvfs.sharedCache";
             public const string ScalarTelemetryId = GitConfig.ScalarPrefix + "telemetry-id";
             public const string ScalarTelemetryPipe = GitConfig.ScalarPrefix + "telemetry-pipe";
             public const string IKey = GitConfig.ScalarPrefix + "ikey";

Scalar.FunctionalTests/Tests/EnlistmentPerFixture/CacheServerTests.cs

@@ -13,7 +13,7 @@ public class CacheServerTests : TestsWithEnlistmentPerFixture
         [TestCase]
         public void SettingGitConfigChangesCacheServer()
         {
-            ProcessResult result = GitProcess.InvokeProcess(this.Enlistment.RepoRoot, "config scalar.cache-server " + CustomUrl);
+            ProcessResult result = GitProcess.InvokeProcess(this.Enlistment.RepoRoot, "config gvfs.cache-server " + CustomUrl);
             result.ExitCode.ShouldEqual(0, result.Errors);
 
             this.Enlistment.GetCacheServer().ShouldContain("Using cache server: User Defined (" + CustomUrl + ")");

Scalar.FunctionalTests/Tests/EnlistmentPerFixture/CloneTests.cs

@@ -91,11 +91,9 @@ public void CloneWithDefaultLocalCacheLocation()
 
             string dotScalarRoot = Path.Combine(newEnlistmentRoot, ScalarTestConfig.DotScalarRoot);
             dotScalarRoot.ShouldBeADirectory(fileSystem);
-            string localCacheRoot = ScalarHelpers.GetPersistedLocalCacheRoot(dotScalarRoot);
-            string gitObjectsRoot = ScalarHelpers.GetPersistedGitObjectsRoot(dotScalarRoot);
+            string gitObjectsRoot = ScalarHelpers.GetGitObjectsRoot(Path.Combine(newEnlistmentRoot, "src"));
 
             string defaultScalarCacheRoot = Path.Combine(homeDirectory, ".scalarCache");
-            localCacheRoot.StartsWith(defaultScalarCacheRoot, StringComparison.Ordinal).ShouldBeTrue($"Local cache root did not default to using {homeDirectory}");
             gitObjectsRoot.StartsWith(defaultScalarCacheRoot, StringComparison.Ordinal).ShouldBeTrue($"Git objects root did not default to using {homeDirectory}");
 
             RepositoryHelpers.DeleteTestDirectory(newEnlistmentRoot);

Scalar.FunctionalTests/Tests/EnlistmentPerFixture/MountTests.cs

@@ -119,60 +119,14 @@ public void MountFailsWhenNoOnDiskVersion()
         }
 
         [TestCase]
-        public void MountFailsWhenNoLocalCacheRootInRepoMetadata()
+        public void MountFailsWhenNoGitObjectsRootInGitConfig()
         {
             this.Enlistment.UnmountScalar();
+            string gitObjectsRoot = ScalarHelpers.GetGitObjectsRoot(this.Enlistment.RepoRoot);
 
-            string majorVersion;
-            string minorVersion;
-            ScalarHelpers.GetPersistedDiskLayoutVersion(this.Enlistment.DotScalarRoot, out majorVersion, out minorVersion);
-            majorVersion.ShouldNotBeNull();
-            minorVersion.ShouldNotBeNull();
-
-            string objectsRoot = ScalarHelpers.GetPersistedGitObjectsRoot(this.Enlistment.DotScalarRoot).ShouldNotBeNull();
-
-            string metadataPath = Path.Combine(this.Enlistment.DotScalarRoot, ScalarHelpers.RepoMetadataName);
-            string metadataBackupPath = metadataPath + ".backup";
-            this.fileSystem.MoveFile(metadataPath, metadataBackupPath);
-
-            this.fileSystem.CreateEmptyFile(metadataPath);
-            ScalarHelpers.SaveDiskLayoutVersion(this.Enlistment.DotScalarRoot, majorVersion, minorVersion);
-            ScalarHelpers.SaveGitObjectsRoot(this.Enlistment.DotScalarRoot, objectsRoot);
-
-            this.MountShouldFail("Failed to determine local cache path from repo metadata");
-
-            this.fileSystem.DeleteFile(metadataPath);
-            this.fileSystem.MoveFile(metadataBackupPath, metadataPath);
-
-            this.Enlistment.MountScalar();
-        }
-
-        [TestCase]
-        public void MountFailsWhenNoGitObjectsRootInRepoMetadata()
-        {
-            this.Enlistment.UnmountScalar();
-
-            string majorVersion;
-            string minorVersion;
-            ScalarHelpers.GetPersistedDiskLayoutVersion(this.Enlistment.DotScalarRoot, out majorVersion, out minorVersion);
-            majorVersion.ShouldNotBeNull();
-            minorVersion.ShouldNotBeNull();
-
-            string localCacheRoot = ScalarHelpers.GetPersistedLocalCacheRoot(this.Enlistment.DotScalarRoot).ShouldNotBeNull();
-
-            string metadataPath = Path.Combine(this.Enlistment.DotScalarRoot, ScalarHelpers.RepoMetadataName);
-            string metadataBackupPath = metadataPath + ".backup";
-            this.fileSystem.MoveFile(metadataPath, metadataBackupPath);
-
-            this.fileSystem.CreateEmptyFile(metadataPath);
-            ScalarHelpers.SaveDiskLayoutVersion(this.Enlistment.DotScalarRoot, majorVersion, minorVersion);
-            ScalarHelpers.SaveLocalCacheRoot(this.Enlistment.DotScalarRoot, localCacheRoot);
-
-            this.MountShouldFail("Failed to determine git objects root from repo metadata");
-
-            this.fileSystem.DeleteFile(metadataPath);
-            this.fileSystem.MoveFile(metadataBackupPath, metadataPath);
-
+            GitProcess.Invoke(this.Enlistment.RepoRoot, $"config --local --unset-all {ScalarHelpers.GitConfigObjectCache}");
+            this.MountShouldFail("Failed to determine git objects root from git config");
+            GitProcess.Invoke(this.Enlistment.RepoRoot, $"config--local {ScalarHelpers.GitConfigObjectCache} {gitObjectsRoot}");
             this.Enlistment.MountScalar();
         }
 
@@ -181,7 +135,7 @@ public void MountRegeneratesAlternatesFileWhenMissingGitObjectsRoot()
         {
             this.Enlistment.UnmountScalar();
 
-            string objectsRoot = ScalarHelpers.GetPersistedGitObjectsRoot(this.Enlistment.DotScalarRoot).ShouldNotBeNull();
+            string objectsRoot = ScalarHelpers.GetGitObjectsRoot(this.Enlistment.RepoRoot);
 
             string alternatesFilePath = Path.Combine(this.Enlistment.RepoRoot, ".git", "objects", "info", "alternates");
             alternatesFilePath.ShouldBeAFile(this.fileSystem).WithContents(objectsRoot);
@@ -197,7 +151,7 @@ public void MountRegeneratesAlternatesFileWhenMissingFromDisk()
         {
             this.Enlistment.UnmountScalar();
 
-            string objectsRoot = ScalarHelpers.GetPersistedGitObjectsRoot(this.Enlistment.DotScalarRoot).ShouldNotBeNull();
+            string objectsRoot = ScalarHelpers.GetGitObjectsRoot(this.Enlistment.RepoRoot);
 
             string alternatesFilePath = Path.Combine(this.Enlistment.RepoRoot, ".git", "objects", "info", "alternates");
             alternatesFilePath.ShouldBeAFile(this.fileSystem).WithContents(objectsRoot);

Scalar.FunctionalTests/Tests/MultiEnlistmentTests/SharedCacheTests.cs

@@ -111,7 +111,7 @@ public void DeleteObjectsCacheAndCacheMappingBeforeMount()
 
             enlistment1.UnmountScalar();
 
-            string objectsRoot = ScalarHelpers.GetPersistedGitObjectsRoot(enlistment1.DotScalarRoot).ShouldNotBeNull();
+            string objectsRoot = ScalarHelpers.GetGitObjectsRoot(enlistment1.RepoRoot);
             objectsRoot.ShouldBeADirectory(this.fileSystem);
             RepositoryHelpers.DeleteTestDirectory(objectsRoot);
 
@@ -153,7 +153,7 @@ public void MountReusesLocalCacheKeyWhenGitObjectsRootDeleted()
             enlistment.UnmountScalar();
 
             // Find the current git objects root and ensure it's on disk
-            string objectsRoot = ScalarHelpers.GetPersistedGitObjectsRoot(enlistment.DotScalarRoot).ShouldNotBeNull();
+            string objectsRoot = ScalarHelpers.GetGitObjectsRoot(enlistment.RepoRoot);
             objectsRoot.ShouldBeADirectory(this.fileSystem);
 
             string mappingFilePath = Path.Combine(enlistment.LocalCacheRoot, "mapping.dat");
@@ -165,7 +165,7 @@ public void MountReusesLocalCacheKeyWhenGitObjectsRootDeleted()
 
             enlistment.MountScalar();
 
-            ScalarHelpers.GetPersistedGitObjectsRoot(enlistment.DotScalarRoot).ShouldEqual(objectsRoot);
+            ScalarHelpers.GetGitObjectsRoot(enlistment.RepoRoot).ShouldEqual(objectsRoot);
             objectsRoot.ShouldBeADirectory(this.fileSystem);
             mappingFilePath.ShouldBeAFile(this.fileSystem).WithContents(mappingFileContents);
 
@@ -180,7 +180,7 @@ public void MountUsesNewLocalCacheKeyWhenLocalCacheDeleted()
             enlistment.UnmountScalar();
 
             // Find the current git objects root and ensure it's on disk
-            string objectsRoot = ScalarHelpers.GetPersistedGitObjectsRoot(enlistment.DotScalarRoot).ShouldNotBeNull();
+            string objectsRoot = ScalarHelpers.GetGitObjectsRoot(enlistment.RepoRoot);
             objectsRoot.ShouldBeADirectory(this.fileSystem);
 
             string mappingFilePath = Path.Combine(enlistment.LocalCacheRoot, "mapping.dat");
@@ -204,7 +204,7 @@ public void MountUsesNewLocalCacheKeyWhenLocalCacheDeleted()
 
             // Validate the new objects root is on disk and uses the new key
             objectsRoot.ShouldNotExistOnDisk(this.fileSystem);
-            string newObjectsRoot = ScalarHelpers.GetPersistedGitObjectsRoot(enlistment.DotScalarRoot);
+            string newObjectsRoot = ScalarHelpers.GetGitObjectsRoot(enlistment.RepoRoot);
             newObjectsRoot.ShouldNotEqual(objectsRoot);
             newObjectsRoot.ShouldContain(newCacheKey);
             newObjectsRoot.ShouldBeADirectory(this.fileSystem);
@@ -247,7 +247,7 @@ private ScalarFunctionalTestEnlistment CloneAndMountEnlistment(string branch = n
 
         private void AlternatesFileShouldHaveGitObjectsRoot(ScalarFunctionalTestEnlistment enlistment)
         {
-            string objectsRoot = ScalarHelpers.GetPersistedGitObjectsRoot(enlistment.DotScalarRoot);
+            string objectsRoot = ScalarHelpers.GetGitObjectsRoot(enlistment.RepoRoot);
             string alternatesFileContents = Path.Combine(enlistment.RepoRoot, ".git", "objects", "info", "alternates").ShouldBeAFile(this.fileSystem).WithContents();
             alternatesFileContents.ShouldEqual(objectsRoot);
         }

Scalar.FunctionalTests/Tools/ScalarHelpers.cs

@@ -14,17 +14,14 @@ public static class ScalarHelpers
         public const string ModifiedPathsNewLine = "\r\n";
         public const string PlaceholderFieldDelimiter = "\0";
 
+        public const string GitConfigObjectCache = "gvfs.sharedCache";
+
         public static readonly string BackgroundOpsFile = Path.Combine("databases", "BackgroundGitOperations.dat");
         public static readonly string PlaceholderListFile = Path.Combine("databases", "PlaceholderList.dat");
         public static readonly string RepoMetadataName = Path.Combine("databases", "RepoMetadata.dat");
 
-        private const string ModifedPathsLineAddPrefix = "A ";
-        private const string ModifedPathsLineDeletePrefix = "D ";
-
         private const string DiskLayoutMajorVersionKey = "DiskLayoutVersion";
         private const string DiskLayoutMinorVersionKey = "DiskLayoutMinorVersion";
-        private const string LocalCacheRootKey = "LocalCacheRoot";
-        private const string GitObjectsRootKey = "GitObjectsRoot";
         private const string BlobSizesRootKey = "BlobSizesRoot";
 
         public static string ConvertPathToGitFormat(string path)
@@ -44,24 +41,12 @@ public static void GetPersistedDiskLayoutVersion(string dotScalarRoot, out strin
             minorVersion = GetPersistedValue(dotScalarRoot, DiskLayoutMinorVersionKey);
         }
 
-        public static void SaveLocalCacheRoot(string dotScalarRoot, string value)
-        {
-            SavePersistedValue(dotScalarRoot, LocalCacheRootKey, value);
-        }
-
-        public static string GetPersistedLocalCacheRoot(string dotScalarRoot)
-        {
-            return GetPersistedValue(dotScalarRoot, LocalCacheRootKey);
-        }
-
-        public static void SaveGitObjectsRoot(string dotScalarRoot, string value)
-        {
-            SavePersistedValue(dotScalarRoot, GitObjectsRootKey, value);
-        }
-
-        public static string GetPersistedGitObjectsRoot(string dotScalarRoot)
+        public static string GetGitObjectsRoot(string repoRoot)
         {
-            return GetPersistedValue(dotScalarRoot, GitObjectsRootKey);
+            ProcessResult result = GitProcess.InvokeProcess(repoRoot, $"config --local {ScalarHelpers.GitConfigObjectCache}");
+            result.ExitCode.ShouldEqual(0, $"Failed to read git object root from config, error: {result.ExitCode}");
+            string.IsNullOrWhiteSpace(result.Output).ShouldBeFalse($"{ScalarHelpers.GitConfigObjectCache} should be set");
+            return result.Output.TrimEnd('\n');
         }
 
         public static string GetPersistedBlobSizesRoot(string dotScalarRoot)

Scalar.Mount/InProcessMount.cs

@@ -64,17 +64,14 @@ public void Mount(EventLevel verbosity, Keywords keywords)
             }
 
             string gitObjectsRoot;
-            if (!RepoMetadata.Instance.TryGetGitObjectsRoot(out gitObjectsRoot, out error))
+            GitProcess process = new GitProcess(this.enlistment);
+            GitProcess.ConfigResult result = process.GetFromLocalConfig(ScalarConstants.GitConfig.ObjectCache);
+            if (!result.TryParseAsString(out gitObjectsRoot, out error))
             {
-                this.FailMountAndExit("Failed to determine git objects root from repo metadata: " + error);
-            }
-
-            string localCacheRoot;
-            if (!RepoMetadata.Instance.TryGetLocalCacheRoot(out localCacheRoot, out error))
-            {
-                this.FailMountAndExit("Failed to determine local cache path from repo metadata: " + error);
+                this.FailMountAndExit("Failed to determine git objects root from git config: " + error);
             }
 
+            string localCacheRoot = Path.GetDirectoryName(gitObjectsRoot);
             this.tracer.RelatedEvent(
                 EventLevel.Informational,
                 "CachePathsLoaded",

Scalar.UnitTests/Common/CacheServerResolverTests.cs

@@ -25,16 +25,6 @@ public void CanGetCacheServerFromNewConfig()
             CacheServerResolver.GetUrlFromConfig(enlistment).ShouldEqual(CacheServerUrl);
         }
 
-        [TestCase]
-        public void CanGetCacheServerFromOldConfig()
-        {
-            MockScalarEnlistment enlistment = this.CreateEnlistment(null, CacheServerUrl);
-            CacheServerInfo cacheServer = CacheServerResolver.GetCacheServerFromConfig(enlistment);
-
-            cacheServer.Url.ShouldEqual(CacheServerUrl);
-            CacheServerResolver.GetUrlFromConfig(enlistment).ShouldEqual(CacheServerUrl);
-        }
-
         [TestCase]
         public void CanGetCacheServerWithNoConfig()
         {
@@ -195,7 +185,7 @@ private MockScalarEnlistment CreateEnlistment(string newConfigValue = null, stri
         {
             MockGitProcess gitProcess = new MockGitProcess();
             gitProcess.SetExpectedCommandResult(
-                "config --local scalar.cache-server",
+                "config --local gvfs.cache-server",
                 () => new GitProcess.Result(newConfigValue ?? string.Empty, string.Empty, newConfigValue != null ? GitProcess.Result.SuccessCode : GitProcess.Result.GenericFailureCode));
             gitProcess.SetExpectedCommandResult(
                 "config scalar.mock:..repourl.cache-server-url",

Scalar/CommandLine/CloneVerb.cs

@@ -521,7 +521,7 @@ private Result CreateClone()
             }
 
             string errorMessage;
-            if (!this.TryCreateAlternatesFile(this.fileSystem, this.enlistment, out errorMessage))
+            if (!this.TrySetObjectCacheLocation(this.fileSystem, this.enlistment, out errorMessage))
             {
                 return new Result("Error configuring alternate: " + errorMessage);
             }