Conan Full Build Error

[garunzo]

=> ERROR [conan 5/5] RUN ue4 conan generate && echo '' && echo 'RUN directive complete. Docker will now commit the filesystem layer to disk.' && echo 'Note that for large filesystem layers this can take quite 2.7s

when running ue4-docker build 5.4.4 --target=full

[BojanV03]

I have encountered the same issue. Did you manage to fix it?

Posting additional info

0.445 Using user-specified engine root: /home/ue4/UnrealEngine
2.521 Removing the "ue5.4-Linux-x86_64-unknown-linux-gnu" Conan profile if it already exists...
2.521 Removing any previous versions of profile base packages...
2.521 Creating "ue5.4-Linux-x86_64-unknown-linux-gnu" Conan profile using autodetected settings...
2.521 Installing profile base packages...
2.521 Copying the "ue5.4-Linux-x86_64-unknown-linux-gnu" Conan profile into a new profile named "ue4"...
2.521 Retrieving thirdparty library list from UBT...
2.521 Traceback (most recent call last):
2.521   File "/usr/local/bin/ue4", line 8, in <module>
2.521     sys.exit(main())
2.521   File "/usr/local/lib/python3.10/dist-packages/ue4cli/cli.py", line 222, in main
2.521     SUPPORTED_COMMANDS[command]['action'](manager, args)
2.521   File "/usr/local/lib/python3.10/dist-packages/conan_ue4cli/main.py", line 48, in main
2.521     SUBCOMMANDS[subcommand]['function'](manager, args[1:])
2.521   File "/usr/local/lib/python3.10/dist-packages/conan_ue4cli/commands/generate.py", line 153, in generate
2.521     libs = [lib for lib in manager.listThirdPartyLibs() if lib != 'libc++']
2.521   File "/usr/local/lib/python3.10/dist-packages/ue4cli/UnrealManagerBase.py", line 183, in listThirdPartyLibs
2.521     return interrogator.list(self.getPlatformIdentifier(), configuration, self._getLibraryOverrides())
2.521   File "/usr/local/lib/python3.10/dist-packages/ue4cli/UE4BuildInterrogator.py", line 20, in list
2.521     modules = self._getThirdPartyLibs(platformIdentifier, configuration)
2.521   File "/usr/local/lib/python3.10/dist-packages/ue4cli/UE4BuildInterrogator.py", line 170, in _getThirdPartyLibs
2.521     self.runUBTFunc('UnrealEditor', platformIdentifier, configuration, args)
2.521   File "/usr/local/lib/python3.10/dist-packages/ue4cli/UnrealManagerBase.py", line 695, in <lambda>
2.521     ubtLambda = lambda target, platform, config, args: self._runUnrealBuildTool(target, platform, config, args, True)
2.521   File "/usr/local/lib/python3.10/dist-packages/ue4cli/UnrealManagerBase.py", line 687, in _runUnrealBuildTool
2.522     return Utility.capture(arguments, cwd=self.getEngineRoot(), raiseOnError=True)
2.522   File "/usr/local/lib/python3.10/dist-packages/ue4cli/Utility.py", line 125, in capture
2.522     raise Exception(
2.522 Exception: child process ['/home/ue4/UnrealEngine/Engine/Build/BatchFiles/Linux/Build.sh', 'UnrealEditor', 'Linux', 'Development', '-Mode=JsonExport', '-OutputFile=/tmp/tmpm89lfgua/ubt_output.json'] failed with exit code 1
2.522 stdout: "Setting up bundled DotNet SDK
2.522 Running command : dotnet Engine/Binaries/DotNET/UnrealBuildTool/UnrealBuildTool.dll UnrealEditor Linux Development -Mode=JsonExport -OutputFile=/tmp/tmpm89lfgua/ubt_output.json
2.522
2.522 Welcome to .NET !
2.522 ---------------------
2.522 SDK Version:
2.522
2.522 Telemetry
2.522 ---------
2.522 The .NET tools collect usage data in order to help us improve your experience. It is collected by Microsoft and shared with the community. You can opt-out of telemetry by setting the DOTNET_CLI_TELEMETRY_OPTOUT environment variable to '1' or 'true' using your favorite shell.
2.522
2.522 Read more about .NET CLI Tools telemetry: https://aka.ms/dotnet-cli-telemetry
2.522
2.522 ----------------
2.522 Installed an ASP.NET Core HTTPS development certificate.
2.522 To trust the certificate run 'dotnet dev-certs https --trust' (Windows and macOS only).
2.522 Learn about HTTPS: https://aka.ms/dotnet-https
2.522 ----------------
2.522 Write your first app: https://aka.ms/dotnet-hello-world
2.522 Find out what's new: https://aka.ms/dotnet-whats-new
2.522 Explore documentation: https://aka.ms/dotnet-docs
2.522 Report issues and find source on GitHub: https://github.com/dotnet/core
2.522 Use 'dotnet --help' to see available commands or visit: https://aka.ms/dotnet-cli
2.522 --------------------------------------------------------------------------------------
2.522 "
2.522 stderr: "Could not execute because the specified command or file was not found.
2.522 Possible reasons for this include:
2.522   * You misspelled a built-in dotnet command.
2.522   * You intended to execute a .NET program, but dotnet-Engine/Binaries/DotNET/UnrealBuildTool/UnrealBuildTool.dll does not exist.
2.522   * You intended to run a global tool, but a dotnet-prefixed executable with this name could not be found on the PATH.
2.522 "
------
Dockerfile:20
--------------------
  18 |     # Extract the third-party library details from UBT
  19 |     RUN ue4 setroot /home/ue4/UnrealEngine && echo '' && echo 'RUN directive complete. Docker will now commit the filesystem layer to disk.' && echo 'Note that for large filesystem layers this can take quite some time.' && echo 'Performing filesystem layer commit...' && echo ''
  20 | >>> RUN ue4 conan generate && echo '' && echo 'RUN directive complete. Docker will now commit the filesystem layer to disk.' && echo 'Note that for large filesystem layers this can take quite some time.' && echo 'Performing filesystem layer commit...' && echo ''
  21 |
  22 |     # Copy the generated Conan packages into a new image with our Installed Build
--------------------
ERROR: failed to solve: process "/bin/sh -c ue4 conan generate && echo '' && echo 'RUN directive complete. Docker will now commit the filesystem layer to disk.' && echo 'Note that for large filesystem layers this can take quite some time.' && echo 'Performing filesystem layer commit...' && echo ''" did not complete successfully: exit code: 1
[ue4-docker build] Error: failed to build image "adamrehn/ue4-full:5.4.4-opengl-ubuntu22.04".```

[TBBle]

Hmm. We're just calling out to UE's Build.sh, so it looks like a UE-side issue, but perhaps we need to do something to ensure that .dll exists first...

Also, poking around, there used to be an issue that UnrealBuildTool.dll was in the wrong directory (or perhaps the Build.sh has a faulty default for installed builds... although this might be unrelated and was also years ago.)

And of course, it might be a new issue with UE 5.4.4, that we would have to work-around or patch. UE 5.5.0 is out now, so we may never see a UE 5.4.5 if it is an engine-side bug; it'd be good to know if this is also affecting UE 5.5.0.

I don't have a Linux box handy to investigate this right now, but if anyone's up for debugging, determining if there is a UnrealBuildTool.dll created before this step, and if so, where it's located, would help narrow down the issue.