Error on installation from .tgz: Access to the path "/usr/share/GitForUnity"

[doctorpangloss]

2019.3.11f1 macOS 10.14.6

System.UnauthorizedAccessException: Access to the path "/usr/share/GitForUnity" is denied.
  at System.IO.Directory.CreateDirectoriesInternal (System.String path) [0x0005e] in <437ba245d8404784b9fbab9b439ac908>:0 
  at System.IO.Directory.CreateDirectory (System.String path) [0x0008f] in <437ba245d8404784b9fbab9b439ac908>:0 
  at Unity.VersionControl.Git.IO.FileSystem.DirectoryCreate (System.String path) [0x0001e] in /Users/bberman/Documents/Spellsource/unityclient/Library/PackageCache/com.unity.git@fca0c039e9e8-1587858265220/Api/IO/SimpleIO.cs:1538 
  at Unity.VersionControl.Git.IO.SPath.CreateDirectory () [0x0003a] in /Users/bberman/Documents/Spellsource/unityclient/Library/PackageCache/com.unity.git@fca0c039e9e8-1587858265220/Api/IO/SimpleIO.cs:637 
  at Unity.VersionControl.Git.IO.SPath.EnsureDirectoryExists (System.String append) [0x00032] in /Users/bberman/Documents/Spellsource/unityclient/Library/PackageCache/com.unity.git@fca0c039e9e8-1587858265220/Api/IO/SimpleIO.cs:1023 
  at Unity.VersionControl.Git.ApplicationEnvironment..ctor (System.String applicationName) [0x0005f] in /Users/bberman/Documents/Spellsource/unityclient/Library/PackageCache/com.unity.git@fca0c039e9e8-1587858265220/Api/Platform/ApplicationEnvironment.cs:20 
  at Unity.VersionControl.Git.EntryPoint..cctor () [0x0000b] in /Users/bberman/Documents/Spellsource/unityclient/Library/PackageCache/com.unity.git@fca0c039e9e8-1587858265220/Editor/EntryPoint.cs:17 
 #0 GetStacktrace(int)
 #1 DebugStringToFile(DebugStringToFileData const&)
 #2 DebugLogHandler::Internal_Log(LogType, LogOption, core::basic_string<char, core::StringStorageDefault<char> >, Object*)
 #3 DebugLogHandler_CUSTOM_Internal_Log(LogType, LogOption, ScriptingBackendNativeStringPtrOpaque*, ScriptingBackendNativeObjectPtrOpaque*)
 #4  (Mono JIT Code) (wrapper managed-to-native) UnityEngine.DebugLogHandler:Internal_Log (UnityEngine.LogType,UnityEngine.LogOption,string,UnityEngine.Object)
 #5  (Mono JIT Code) (wrapper runtime-invoke) <Module>:runtime_invoke_void_object (object,intptr,intptr,intptr)
 #6 mono_jit_runtime_invoke
 #7 do_runtime_invoke
 #8 mono_runtime_invoke
 #9 scripting_method_invoke(ScriptingMethodPtr, ScriptingObjectPtr, ScriptingArguments&, ScriptingExceptionPtr*, bool)
 #10 ScriptingInvocation::Invoke(ScriptingExceptionPtr*, bool)
 #11 Scripting::UnityEditor::EditorAssembliesProxy::ProcessInitializeOnLoadAttributes(ScriptingArrayPtr, ScriptingExceptionPtr*)
 #12 MonoManager::SetupLoadedEditorAssemblies(dynamic_array<int, 0ul> const&)
 #13 MonoManager::EndReloadAssembly(DomainReloadingData&, dynamic_bitset)
 #14 MonoManager::ReloadAssembly()
 #15 ReloadAllUsedAssemblies()
 #16 RefreshInternalV2(AssetDatabase::UpdateAssetOptions, ScanFilter const&, InternalRefreshFlagsV2)
 #17 StopAssetImportingV2(AssetDatabase::UpdateAssetOptions, InternalRefreshFlagsV2, ScanFilter const*)
 #18 RefreshV2(AssetDatabase::UpdateAssetOptions)
 #19 AssetDatabase::Refresh(AssetDatabase::UpdateAssetOptions)
 #20 PackageManager::Api::ProcessPendingAssetRefreshCallback(PackageManager::Api*)
 #21 CallbackArray::Invoke()
 #22 ProfilerCallbackInvoke<CallbackArray, &(GlobalCallbacks::tickEditor)>::Invoke(char const*)
 #23 Application::TickTimer()
 #24 -[EditorApplication TickTimer]
 #25 __NSFireTimer
 #26 __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__
 #27 __CFRunLoopDoTimer
 #28 __CFRunLoopDoTimers
 #29 __CFRunLoopRun
 #30 CFRunLoopRunSpecific
 #31 RunCurrentEventLoopInMode
 #32 ReceiveNextEventCommon
 #33 _BlockUntilNextEventMatchingListInModeWithFilter
 #34 _DPSNextEvent
 #35 -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:]
 #36 -[NSApplication run]
 #37 NSApplicationMain
 #38 EditorMain(int, char const**)
 #39 main
 #40 start

Steps to Reproduce

1. Open Package Manager
2. Install from the https://github.com/Unity-Technologies/Git-for-Unity/releases/download/v2.1.14-preview/com.unity.git-2.1.14-preview.tgz link
3. Observe an UnauthorizedAccessException

Expected behavior: The plugin should start.

Actual behavior: It does not

Reproduces how often: 100%

A modern macOS with SIP enabled cannot write to this directory. Observe:

$ sudo mkdir /usr/share/GitForUnity
mkdir: /usr/share/GitForUnity: Operation not permitted

[ongjinwen]

I don't think that .tgz works as a Git URL. However, I was able to make it work with the package unzipped in a repository (with package.json at the root) and using that repository as the Git URL.

[doctorpangloss]

I think this is one of those situations where if you use macOS to make iOS games you're out of luck with this package.

[shana]

@doctorpangloss Sorry about that, macOS keeps changing out from under me. I've got a potential fix for this at https://ci.appveyor.com/api/buildjobs/pndp3o4n8ahy7f5w/artifacts/build%2Fnpm%2Fcom.unity.git-2.1.21-preview-gfbee648bc8.tgz, if you're up for trying it.