Not working in .NET Core docker image

Hello!

Just added NerdBank.GitVersioning to a .NET Core solution, and I’m receiving some errors. The solution is build with GitLab CI on a Docker container running the image microsoft/dotnet:2.1-sdk. The error I’m getting when building:

/root/.nuget/packages/nerdbank.gitversioning/2.2.33/build/Nerdbank.GitVersioning.targets(63,5): error MSB4018: The "Nerdbank.GitVersioning.Tasks.GetBuildVersion" task failed unexpectedly. [/build/nerdbank.csproj]
/root/.nuget/packages/nerdbank.gitversioning/2.2.33/build/Nerdbank.GitVersioning.targets(63,5): error MSB4018: System.TypeInitializationException: The type initializer for 'LibGit2Sharp.Core.NativeMethods' threw an exception. ---> System.DllNotFoundException: Unable to load shared library '/root/.nuget/packages/nerdbank.gitversioning/2.2.33/build/lib/linux/x86_64/libgit2-6311e88.so' or one of its dependencies. In order to help diagnose loading problems, consider setting the LD_DEBUG environment variable: libssl.so.1.0.0: cannot open shared object file: No such file or directory [/build/nerdbank.csproj]
/root/.nuget/packages/nerdbank.gitversioning/2.2.33/build/Nerdbank.GitVersioning.targets(63,5): error MSB4018:    at System.Runtime.Loader.AssemblyLoadContext.InternalLoadUnmanagedDllFromPath(String unmanagedDllPath) [/build/nerdbank.csproj]
/root/.nuget/packages/nerdbank.gitversioning/2.2.33/build/Nerdbank.GitVersioning.targets(63,5): error MSB4018:    at System.Runtime.Loader.AssemblyLoadContext.LoadUnmanagedDllFromPath(String unmanagedDllPath) [/build/nerdbank.csproj]
/root/.nuget/packages/nerdbank.gitversioning/2.2.33/build/Nerdbank.GitVersioning.targets(63,5): error MSB4018:    at MSBuildExtensionTask.ContextAwareTask.CustomAssemblyLoader.LoadUnmanagedDll(String unmanagedDllName) [/build/nerdbank.csproj]
/root/.nuget/packages/nerdbank.gitversioning/2.2.33/build/Nerdbank.GitVersioning.targets(63,5): error MSB4018:    at System.Runtime.Loader.AssemblyLoadContext.ResolveUnmanagedDll(String unmanagedDllName, IntPtr gchManagedAssemblyLoadContext) [/build/nerdbank.csproj]
/root/.nuget/packages/nerdbank.gitversioning/2.2.33/build/Nerdbank.GitVersioning.targets(63,5): error MSB4018:    at LibGit2Sharp.Core.NativeMethods.git_libgit2_init() [/build/nerdbank.csproj]
/root/.nuget/packages/nerdbank.gitversioning/2.2.33/build/Nerdbank.GitVersioning.targets(63,5): error MSB4018:    at LibGit2Sharp.Core.NativeMethods.LoadNativeLibrary() [/build/nerdbank.csproj]
/root/.nuget/packages/nerdbank.gitversioning/2.2.33/build/Nerdbank.GitVersioning.targets(63,5): error MSB4018:    at LibGit2Sharp.Core.NativeMethods..cctor() [/build/nerdbank.csproj]
/root/.nuget/packages/nerdbank.gitversioning/2.2.33/build/Nerdbank.GitVersioning.targets(63,5): error MSB4018:    --- End of inner exception stack trace --- [/build/nerdbank.csproj]
/root/.nuget/packages/nerdbank.gitversioning/2.2.33/build/Nerdbank.GitVersioning.targets(63,5): error MSB4018:    at LibGit2Sharp.Core.NativeMethods.git_libgit2_opts(Int32 option, UInt32 level, String path) [/build/nerdbank.csproj]
/root/.nuget/packages/nerdbank.gitversioning/2.2.33/build/Nerdbank.GitVersioning.targets(63,5): error MSB4018:    at LibGit2Sharp.GlobalSettings.SetConfigSearchPaths(ConfigurationLevel level, String[] paths) [/build/nerdbank.csproj]
/root/.nuget/packages/nerdbank.gitversioning/2.2.33/build/Nerdbank.GitVersioning.targets(63,5): error MSB4018:    at Nerdbank.GitVersioning.GitExtensions.OpenGitRepo(String pathUnderGitRepo) [/build/nerdbank.csproj]
/root/.nuget/packages/nerdbank.gitversioning/2.2.33/build/Nerdbank.GitVersioning.targets(63,5): error MSB4018:    at Nerdbank.GitVersioning.VersionOracle.Create(String projectDirectory, String gitRepoDirectory, ICloudBuild cloudBuild, Nullable`1 overrideBuildNumberOffset, String projectPathRelativeToGitRepoRoot) [/build/nerdbank.csproj]
/root/.nuget/packages/nerdbank.gitversioning/2.2.33/build/Nerdbank.GitVersioning.targets(63,5): error MSB4018:    at Nerdbank.GitVersioning.Tasks.GetBuildVersion.ExecuteInner() [/build/nerdbank.csproj]

After digging around for a couple of hours, I tried to create a new console project inside the container and then adding NerdBank.GitVersioning:

Running in Docker docker run --rm -it microsoft/dotnet:2.1-sdk bash

apt-get update -y && apt-get upgrade -y
export PATH="$PATH:/root/.dotnet/tools"
dotnet tool install -g nbgv
git init
dotnet new console
nbgv install

And then I got the following error:

Unhandled Exception: System.TypeInitializationException: The type initializer for 'LibGit2Sharp.Core.NativeMethods' threw an exception. ---> System.DllNotFoundException: Unable to load shared library 'git2-6311e88' or one of its dependencies. In order to help diagnose loading problems, consider setting the LD_DEBUG environment variable: libgit2-6311e88: cannot open shared object file: No such file or directory
   at LibGit2Sharp.Core.NativeMethods.git_libgit2_init()
   at LibGit2Sharp.Core.NativeMethods.LoadNativeLibrary()
   at LibGit2Sharp.Core.NativeMethods..cctor()
   --- End of inner exception stack trace ---
   at LibGit2Sharp.Core.NativeMethods.git_libgit2_opts(Int32 option, UInt32 level, String path)
   at LibGit2Sharp.GlobalSettings.SetConfigSearchPaths(ConfigurationLevel level, String[] paths)
   at Nerdbank.GitVersioning.GitExtensions.OpenGitRepo(String pathUnderGitRepo)
   at Nerdbank.GitVersioning.Tool.Program.OnInstallCommand(String versionJsonRoot, String version) in D:\a\1\s\src\nbgv\Program.cs:line 151
   at Nerdbank.GitVersioning.Tool.Program.Main(String[] args) in D:\a\1\s\src\nbgv\Program.cs:line 100

I’ve googled a bit and found some issues similar to mine, but the workarounds or solutions provided didn’t work.

Am I doing anything wrong? Can someone point in the right direction?

[labsilva]

I’ve tried with almost all releases from 2.1.x and I couldn’t get it to work. I’ll wait for a new version from libgit2.

As for why I must use Debian… it’s not a case of must, more a case of not wanting to change right now; I have a reasonable number of applications running in my CI pipeline generating images and this change from Debian to Ubuntu would have to be properly validated, and right now it wouldn’t be a good time.

I’ll close this one (if it’s OK with you), and will try again when you release a new version 😄

[AArnott]

Yes, I have. I haven’t looked into it deeply, because my first take suggests it would be incredibly slow. We have to look for version.json files in the tree for each commit in history till we find certain significant changes. That would mean a lot of git.exe invocations. libgit2sharp is much faster than git.exe. Since this runs in people’s builds, and can run many times in a build because it may run once for each project, perf is a very high priority.