libgit2 / libgit2/libgit2sharp

Unable to load DLL 'git2'

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Description

Hi All,

I know there are a number of similar issues listed, but non quite fit my scenario.

I have a system (that I cant change) that stores code and dlls (binary blob) in a database. The data is extracted and a VS Solution is generated. As such I do not have the ability to use NuGet or to force the git2-4aecb64.dll into the specific folders required for it to work.
Additionally the git2.dll is renamed (also out of my control) with a UID on the end.
eg. git2-4aecb64_Server_c8l_S0Kakc7Do5PhhDGPhxoObuMgSRw2detcnbwdOuQ.dll

So, based on other incidents raised, I understandably get the following error when the git-xxx.dll is included in the root folder next to LibGit2Sharp.dll

System.Web.Services.Protocols.SoapException: Server was unable to process request.
---> System.TypeInitializationException: The type initializer for 'LibGit2Sharp.Core.NativeMethods' threw an exception. --->
System.DllNotFoundException: Unable to load DLL 'git2-4aecb64': The specified module could not be found. (Exception from HRESULT: 0x8007007E)at LibGit2Sharp.Core.NativeMethods.git_libgit2_init()at LibGit2Sharp.Core.NativeMethods.LibraryLifetimeObject..ctor()at LibGit2Sharp.Core.NativeMethods..cctor()
--- End of inner exception stack trace ---

Does anyone have any suggestions for resolving this?

Possibly a config item I can pass to LibGit2Sharp that would take a relative path to the git2.dll?

Or could I build a combined DLL?

Reproduction steps
  1. Create new VS 2017 c# console app
  2. Manually add Reference to LibGit2Sharp.dll and then copy git2-4aecb64.dll to the bin folder
  3. Try to Clone a Repository using below code
var cloneOptions = new CloneOptions { BranchName = "master", Checkout = true };
cloneOptions.CredentialsProvider = (_url, _user, _cred) => new UsernamePasswordCredentials { Username = username, Password = pass };
string localFolder = @"C:\Repos\test"; 
var cloneResult = LibGit2Sharp.Repository.Clone(url, localFolder, cloneOptions);
Expected behavior

Repository is cloned

Actual behavior

Exception is raised
System.Web.Services.Protocols.SoapException: Server was unable to process request. ---> System.TypeInitializationException: The type initializer for 'LibGit2Sharp.Core.NativeMethods' threw an exception. ---> System.DllNotFoundException: Unable to load DLL 'git2-4aecb64': The specified module could not be found. (Exception from HRESULT: 0x8007007E)at LibGit2Sharp.Core.NativeMethods.git_libgit2_init()at LibGit2Sharp.Core.NativeMethods.LibraryLifetimeObject..ctor()at LibGit2Sharp.Core.NativeMethods..cctor() --- End of inner exception stack trace ---

Version of LibGit2Sharp (release number or SHA1)

Versions pulled from NuGet package
LibGit2Sharp - version="0.25.4"
LibGit2Sharp.NativeBinaries - version="1.0.252"

Operating system(s) tested; .NET runtime tested

Windows 10 with .Net 4.7

Thanks,

Basil

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start at the NativeMethods initialization shown in the stack trace and reproduce the manual VS 2017 setup with the renamed git2 DLL. A useful resolution would establish whether LibGit2Sharp supports loading that externally renamed binary or clarify the supported deployment arrangement, then verify that the Clone call no longer raises DllNotFoundException.

Written by the indexing model from the issue text.

Assessment

Tech stack
csharp
Domain
devtools
Issue type
Bug
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
20/100

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