LibGit2Sharp: The type initializer for 'LibGit2Sharp.Core.NativeMethods' threw an exception. LibGit2Sharp: Unable to load DLL 'git2-15e1193': The specified module could not be found. #1533

CalvinFengDatacom · 2018-02-11T22:27:48Z

I'm using Azure Function App to create a app for updating Excel file to our ASP.Net Web Api project, which is hosting in Azure, and we are using Git to control the version of files.

Now, I'm having an issue of using LibGit2Sharp. I'd like to use Commands.Checkout() command to switch between branches. However, I got this issue:
LibGit2Sharp: The type initializer for 'LibGit2Sharp.Core.NativeMethods' threw an exception. LibGit2Sharp: Unable to load DLL 'git2-15e1193': The specified module could not be found.

I'm using the latest version of LibGit2Sharp version 0.24.0, and I see it depends on LibGit2Sharp.NativeBinaries": "[1.0.185]"

Does anyone who has any idea how to solve this issue on Function App?

Thanks

ethomson · 2018-02-12T13:42:27Z

Good question - LibGit2Sharp relies on libgit2 itself, a native library, which it accesses through PInvoke. I'm not familiar enough to know if you can use pinvoke with Azure Functions, or if we need to adjust the way we load the native libraries so that Azure Functions is successful.

CalvinFengDatacom · 2018-02-12T19:59:27Z

@ethomson Thanks your for your reply, seems this is a quite new question of LibGit2Sharp. Can you tell me which PInvoke should I use? Can I find it through NuGet? If it's available on NuGet, then I can try to add it to my function app.

bording · 2018-02-12T20:21:25Z

@CalvinFengDatacom You don't have to add anything. The LibGit2Sharp package includes a reference to the LibGit2Sharp.NativeBinaries package, which includes the required native library.

There must be something specific to how Azure Functions works that is preventing the native library from being in the expected location when your code runs.

CalvinFengDatacom · 2018-02-12T21:13:31Z

@bording Thanks, I see when I reload the packages of my Azure function App, LibGit2Sharp.NativeBinaries/1.0.185 has been added automatically.
But, I still got this issue: LibGit2Sharp: The type initializer for 'LibGit2Sharp.Core.NativeMethods' threw an exception. LibGit2Sharp: Unable to load DLL 'git2-15e1193': The specified module could not be found.
Maybe @ethomson is right, seems the way of loading native libraries to Azure Functions need to be adjusted.

But, I'm happy to try other ways if you guys have some idea. I can just setup a small Function App to try this.

ethomson · 2018-02-12T21:23:48Z

Are you able to run this locally in Azure Functions Core Tools?

Are you set up for a 64 bit Azure Function runtime? https://blogs.msdn.microsoft.com/benjaminperkins/2017/02/09/azure-functions-on-64-bit/
Is there any effect from changing these settings?

CalvinFengDatacom · 2018-02-12T21:39:18Z

@ethomson I have changed for using 64 bit of Azure function runtime, but still got the same result.
I haven't try running it locally, should be the same I think.

CalvinFengDatacom · 2018-02-13T01:03:04Z

@ethomson I have tried to debug Azure function locally from Visual studio by Attach Debugger.
https://blogs.msdn.microsoft.com/webdev/2016/12/01/visual-studio-tools-for-azure-functions/

I got the same issue from log console: LibGit2Sharp: The type initializer for 'LibGit2Sharp.Core.NativeMethods' threw an exception. LibGit2Sharp: Unable to load DLL 'git2-15e1193': The specified module could not be found.

Um... Seems I have tried everything already.

CalvinFengDatacom · 2018-02-15T20:57:16Z

@ethomson @bording Hi guys, any updates of using LibGit2Sharp in Azure function app? I have tried to run azure function app locally following this way https://blogs.msdn.microsoft.com/webdev/2016/12/01/visual-studio-tools-for-azure-functions/

But, I still got the same issue from log console.

MikhailTymchukDX · 2018-03-02T11:35:10Z

I get the same message when trying to run a .NET Core app (v0.25.0-preview0073) inside a Linux docker container (using Windows 10 Docker for Windows).

According to this comment, I expected it works inside a Linux containers.

Running an app inside Windows container works ok, but it's not an option for me, because I already use Linux containers for another app (WIndows for Docker can not run both types of containers simultaneously).

ethomson · 2018-03-02T11:48:30Z

@MikhailTymchukDX please try using a debian based container. If you're using alpine or centos, you will need to provide your own libgit2 binaries.

MikhailTymchukDX · 2018-03-02T12:30:03Z

@ethomson Thanks for that tip!

I changed base image to microsoft/dotnet:2.0-sdk-jessie and everything works now on Linux container.

Cyberboss · 2018-03-17T21:17:32Z

Changing to jessie didn't quite do the trick: I'm still getting the same error with this simple program

using LibGit2Sharp;

namespace TestClone
{
    class Program
    {
        static void Main(string[] args) => Repository.Clone("https://github.com/tgstation/tgstation", "tgstation");
    }
}

Only dep is LibGit2Sharp 0.25.0-preview-0081
Dockerfile:

FROM microsoft/aspnetcore:2.0.6-jessie AS base
WORKDIR /app

FROM microsoft/aspnetcore-build:2.0.6-2.1.101-jessie AS build
WORKDIR /src
COPY . .

RUN dotnet restore TestClone/TestClone.csproj

WORKDIR /src/TestClone
RUN dotnet publish -c Docker -o /app
FROM base AS final
WORKDIR /app
COPY --from=build /app .
RUN ls
RUN dotnet TestClone.dll
ENTRYPOINT ["./TestClone"]

Result:

1>Step 12/14 : RUN ls
1> ---> Running in 9142e6549a2a
1>LibGit2Sharp.dll
1>TestClone.deps.json
1>TestClone.dll
1>TestClone.pdb
1>TestClone.runtimeconfig.json
1>runtimes
1>Removing intermediate container 9142e6549a2a
1> ---> 0fb110df7e42
1>Step 13/14 : RUN dotnet TestClone.dll
1> ---> Running in d71b2bd4a62e
1>�[91m
1>Unhandled Exception: �[0m�[91mSystem.TypeInitializationException: The type initializer for 'LibGit2Sharp.Core.NativeMethods' threw an exception. ---> System.DllNotFoundException: Unable to load DLL 'git2-2d2a602': The specified module or one of its dependencies could not be found.
1> (Exception from HRESULT: 0x8007007E)
1>   at LibGit2Sharp.Core.NativeMethods.git_libgit2_init()
1>   at LibGit2Sharp.Core.NativeMethods.LoadNativeLibrary()
1>   at LibGit2Sharp.Core.NativeMethods..cctor()
1>   --- End of inner exception stack trace ---
1>   at LibGit2Sharp.Core.NativeMethods.git_clone(git_repository*& repo, String origin_url, FilePath workdir_path, GitCloneOptions& opts)
1>   at LibGit2Sharp.Core.Proxy.git_clone(String url, String workdir, GitCloneOptions& opts)
1>   at LibGit2Sharp.Repository.Clone(String sourceUrl, String workdirPath, CloneOptions options)
1>   at TestClone.Program.Main(String[] args) in /src/TestClone/Program.cs:line 9
1>�[0m�[91mAborted
1>Service 'mapdiffbot' failed to build: The command '/bin/sh -c dotnet TestClone.dll' returned a non-zero code: 134

EDIT: Upon further investigation this seems to be unique to the aspnetcore image. dotnet-sdk and aspnetcore-build work fine

mattjohnsonpint · 2018-03-30T00:59:45Z

I'm getting the same problem also (in a docker container). Maybe this is naive, but is the issue not just that the libgit2sharp.nativebinaries package ships the file as git2-version.dll on Windows, and libgit2-version.so on Linux?

There's some discussion of these naming issues in dotnet/coreclr#930.

(Using -jessie or -stretch didn't work for me.)

Cyberboss · 2018-03-30T01:03:24Z

I actually got the aspnetcore image working by installing these packages: https://github.com/Cyberboss/MapDiffBot/blob/bcde6d6c150cafede52b419f61ead05896b316ab/MapDiffBot/Dockerfile#L22

…

On Thu, Mar 29, 2018, 8:59 PM Matt Johnson ***@***.***> wrote: I'm getting the same problem also (in a docker container). Maybe this is naive, but is the issue not just that the libgit2sharp.nativebinaries package ships the file as git2-version.dll on Windows, and libgit2-version.so on Linux? There's some discussion of these naming issues in dotnet/coreclr#930 <https://github.com/dotnet/coreclr/issues/930>. — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#1533 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AHyweofWO6Tv9daDDEZEl9sAymNukD0rks5tjYOEgaJpZM4SBidm> .

bording · 2018-03-30T02:02:32Z

I'm getting the same problem also (in a docker container). Maybe this is naive, but is the issue not just that the libgit2sharp.nativebinaries package ships the file as git2-version.dll on Windows, and libgit2-version.so on Linux?

@mj1856 That pattern is the one that is already accounted for via DllImport, so no that's not the issue.

There are two things that could be causing the problem:

The native binary isn't being included in the container in the correct location for it to be found
The base container image you're using doesn't have all of the native dependencies that libgit2 needs.

mattjohnsonpint · 2018-04-02T17:28:20Z

Ok, I got it working with Jessie. I'm not using asp.net core, just the dotnet base images. microsoft/dotnet:2.0-runtime-jessie and microsoft/dotnet:2.0-sdk-jessie. Of the dependencies listed in @Cyberboss's link, the only one I needed to install was libcurl3-gnutls. I'm guessing this is because I was cloning an https repo.

The -stretch images did not work, so I'm wondering what else needs to be installed there. Also, I'd prefer to use openssl instead of gnutls, but I'm not sure how to do that. Anyone know?

Thanks.

Cyberboss · 2018-04-02T17:30:52Z

The method I went through to find what was missing was installing `ld` on the image and then running it on libgit2-xxxxxxx.so to see what couldn't be found. On Apr 2, 2018 1:28 PM, "Matt Johnson" <[email protected]> wrote: Ok, I got it working with Jessie. I'm not using asp.net core, just the dotnet base images. microsoft/dotnet:2.0-runtime-jessie and microsoft/dotnet:2.0-sdk-jessie. Of the dependencies listed in @Cyberboss <https://github.com/Cyberboss>'s link, the only one I needed to install was libcurl3-gnutls. I'm guessing this is because I was cloning an https repo. The -stretch images did not work, so I'm wondering what else needs to be installed there. Also, I'd prefer to use openssl instead of gnutls, but I'm not sure how to do that. Anyone know? Thanks. — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#1533 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AHywesxYAtIzolXpIVowkpWt-cxsY6LMks5tkl_HgaJpZM4SBidm> .

jhueppauff · 2018-04-09T18:11:11Z

did anyone managed to get this working inside an azure function?

marcdurham · 2018-04-26T13:11:29Z

I was having this same issue on a microsoft/aspnetcore:2.0 Docker image.
I was getting this error: DllNotFoundException: Unable to load DLL 'git2-6311e88':
So I followed the link from Cyberboss
Then changed my image version from 2.0 to 2.0.7-jessie

FROM microsoft/aspnetcore:2.0.7-jessie AS base

Then I pasted this code right below the FROM line...

# Dependencies for libgit2
RUN apt-get update && apt-get install -y --no-install-recommends \
	libc6 \
	zlib1g-dev \
	libcomerr2 \
	libc6-dev \
	libgcrypt20 \
	libkeyutils1 \
	libcurl3-gnutls \
	libsasl2-2 \
	libgpg-error0 \
	&& rm -rf /var/lib/apt/lists/*

Then it worked.
Then I rejoiced.
Thanks Cyberboss!

ethomson · 2018-05-17T09:03:11Z

I don't yet have a full understanding of Azure Functions, but: #1574 (comment) indicates that this is indeed possible:

This morning I solved the problem. I used an Azure Function v1 (.NET Framework instead of .NET Standard) with the LibGit2Sharp 0.21.0.176. When you include the native binary in the release it is working!

jeremymeng · 2018-06-12T20:21:03Z

There might be some changes in the native dependencies in 2.1 docker images. The above method worked in 2.0 jessie images, but does not work on 2.1 because only stretch-based images are available.

bording · 2018-06-12T21:51:13Z

#1582 should hopefully be addressing this.

felixfbecker · 2018-06-18T05:07:56Z

I have the same issue when trying to run LibGit2Sharp in PowerShell Core on macOS:

> [LibGit2Sharp.Repository]::new($PWD)
Exception calling ".ctor" with "1" argument(s): "The type initializer for 'LibGit2Sharp.Core.NativeMethods' threw an exception."
At line:1 char:1
+ [LibGit2Sharp.Repository]::new($PWD)
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo          : NotSpecified: (:) [], MethodInvocationException
+ FullyQualifiedErrorId : TypeInitializationException

LibGit2Sharp v0.25.2

ethomson · 2018-06-18T08:57:47Z

@felixfbecker That doesn't sound like it has anything to do with this issue, which is regarding Azure Functions.

felixfbecker · 2018-06-18T16:53:28Z

I figured I would comment here since it's the same error message and people above also said they are having the same issue on Linux and in Linux Docker containers.
Should I open a new issue?

ethomson · 2018-06-18T16:55:42Z

Yeah, this thread has become very messy with similar problems (can't load the native libraries) but very different root causes / platforms. A new issue would be helpful.

felixfbecker · 2018-06-18T20:02:40Z

@ethomson filed #1583

phuongph · 2018-10-22T21:35:26Z

I have a similar issue building *.msi Windows Installer file. When I include following files to the output folder, it works.
\lib\win32\x64\git2-1196807.dll and \lib\win32\x86\git2-1196807.dll

yury-kozlov · 2019-02-13T15:48:08Z

I got similar error when running under target framework of 4.6.1. When I changed target framework to 4.6.2 the problem solved.

deadman2000 · 2019-11-30T09:42:35Z

Found temporary solution for docker:

export LD_LIBRARY_PATH=/root/.nuget/packages/gitversion.tool/5.1.2/tools/netcoreapp3.0/any/runtimes/debian.9-x64/native/

mattjohnsonpint · 2020-07-20T19:27:10Z

An update for those trying to get libgit2sharp to work in Azure Functions. (This is just my own experience. YMMV.)

If you publish your project with default "portable" (i.e. "any" platform), then libgit2sharp will use the the native libgit2 library from the linux-x64 runtimes folder. Unfortunately, that one is compiled against libssl 1.0 which is deprecated in favor of libssl 1.1.

On some Linux environments, libssl 1.0 is pre-installed. However, Linux-based Azure Functions currently uses Debian 9 ("stretch" ) or Debian 10 ("buster") as its runtime. Debian 9 has a libssl 1.0 library available, but not pre-installed. Debian 10 does not have a libssl 1.0 library at all.

Thankfully, libgit2sharp has a Debian 9 native libgit2 library in its runtimes folder, which was built against libssl 1.1. Therefore, all you need to do to work around this issue is publish using the Debian 9 runtime identifier, which is debian.9-x64. That will work with Linux-based Azure Functions on Linux, with or without containers.

If you publish on the command line, add -r debian.9-x64 to your dotnet publish command (in your dockerfile if you use containers).

If you publish from Visual Studio, first create a publishing profile (or edit your existing one), selecting linux-x64 from the target runtime dropdown. Then go edit the .pubxml file for that profile and change to <RuntimeIdentifier>debian.9-x64</RuntimeIdentifier>. (The two steps are needed only because the UI doesn't let you type in other RIDs.)

If you publish from VSCode, edit the .vscode/tasks.json file, find the publish task, and add "--runtime", "debian.9-x64", to the list of args.

devlead mentioned this issue Mar 10, 2018

Centos 7.3 - GitClone throws 'The type initializer for 'LibGit2Sharp.Core.NativeMethods' threw an exception.' - [SOLVED with steps] cake-contrib/Cake_Git#61

Closed

Cyberboss mentioned this issue Mar 17, 2018

Try switching to debian base to fix dll load issue tgstation/MapDiffBot#28

Merged

devlead mentioned this issue Mar 19, 2018

Dll not found while trying to get git version of a repo cake-contrib/Cake_Git#55

Open

ethomson mentioned this issue May 16, 2018

Repository.Clone() not working within a Azure Function (Unable to load DLL 'git2-6311e88') #1574

Closed

skolima mentioned this issue Jun 28, 2018

Running in Docker NuKeeperDotNet/NuKeeper#305

Closed

maikebing mentioned this issue Mar 9, 2019

repository.Head.FriendlyName' threw an exception of type 'System.AccessViolationException' maikebing/Gitea.VisualStudio#11

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lytico mentioned this issue Jan 24, 2021

Debian: type initializer for 'LibGit2Sharp.Core.NativeMethods' threw an exception dotdevelop/libgit2sharp#2

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LibGit2Sharp: The type initializer for 'LibGit2Sharp.Core.NativeMethods' threw an exception. LibGit2Sharp: Unable to load DLL 'git2-15e1193': The specified module could not be found. #1533

LibGit2Sharp: The type initializer for 'LibGit2Sharp.Core.NativeMethods' threw an exception. LibGit2Sharp: Unable to load DLL 'git2-15e1193': The specified module could not be found. #1533

CalvinFengDatacom commented Feb 11, 2018

ethomson commented Feb 12, 2018

CalvinFengDatacom commented Feb 12, 2018

bording commented Feb 12, 2018

CalvinFengDatacom commented Feb 12, 2018

ethomson commented Feb 12, 2018

CalvinFengDatacom commented Feb 12, 2018

CalvinFengDatacom commented Feb 13, 2018 •

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CalvinFengDatacom commented Feb 15, 2018

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ethomson commented Mar 2, 2018

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Cyberboss commented Mar 17, 2018 •

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Cyberboss commented Mar 30, 2018 via email

bording commented Mar 30, 2018

mattjohnsonpint commented Apr 2, 2018

Cyberboss commented Apr 2, 2018 via email

jhueppauff commented Apr 9, 2018

marcdurham commented Apr 26, 2018

ethomson commented May 17, 2018

jeremymeng commented Jun 12, 2018

bording commented Jun 12, 2018

felixfbecker commented Jun 18, 2018

ethomson commented Jun 18, 2018

felixfbecker commented Jun 18, 2018

ethomson commented Jun 18, 2018

felixfbecker commented Jun 18, 2018

phuongph commented Oct 22, 2018

yury-kozlov commented Feb 13, 2019

deadman2000 commented Nov 30, 2019

mattjohnsonpint commented Jul 20, 2020 •

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LibGit2Sharp: The type initializer for 'LibGit2Sharp.Core.NativeMethods' threw an exception. LibGit2Sharp: Unable to load DLL 'git2-15e1193': The specified module could not be found. #1533

LibGit2Sharp: The type initializer for 'LibGit2Sharp.Core.NativeMethods' threw an exception. LibGit2Sharp: Unable to load DLL 'git2-15e1193': The specified module could not be found. #1533

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CalvinFengDatacom commented Feb 11, 2018

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