[abdulbasitsaeed]

Hi everyone!

I'm new to the calibre world, and have installed calibre 8.16.2 headless on Ubuntu Server.

I am trying to install unrardll as indicated here:

pip install unrardll

This gives me the error:

error: externally-managed-environment

× This environment is externally managed
╰─> To install Python packages system-wide, try apt install
    python3-xyz, where xyz is the package you are trying to
    install.

    If you wish to install a non-Debian-packaged Python package,
    create a virtual environment using python3 -m venv path/to/venv.
    Then use path/to/venv/bin/python and path/to/venv/bin/pip. Make
    sure you have python3-full installed.

    If you wish to install a non-Debian packaged Python application,
    it may be easiest to use pipx install xyz, which will manage a
    virtual environment for you. Make sure you have pipx installed.

    See /usr/share/doc/python3.12/README.venv for more information.

note: If you believe this is a mistake, please contact your Python installation or OS distribution provider. You can override this, at the risk of breaking your Python installation or OS, by passing --break-system-packages.
hint: See PEP 668 for the detailed specification.

After creating a virtual environment and running

pip install unrardll

I get the error:

Collecting unrardll
  Using cached unrardll-0.1.7.tar.gz (10.8 MB)
  Installing build dependencies ... done
  Getting requirements to build wheel ... done
  Preparing metadata (pyproject.toml) ... done
Building wheels for collected packages: unrardll
  Building wheel for unrardll (pyproject.toml) ... error
  error: subprocess-exited-with-error

  × Building wheel for unrardll (pyproject.toml) did not run successfully.
  │ exit code: 1
  ╰─> [27 lines of output]
      /tmp/pip-build-env-60kfojh3/overlay/lib/python3.12/site-packages/setuptools/dist.py:759: SetuptoolsDeprecationWarning: License classifiers are deprecated.
      !!

              ********************************************************************************
              Please consider removing the following classifiers in favor of a SPDX license expression:

              License :: OSI Approved :: BSD License

              See https://packaging.python.org/en/latest/guides/writing-pyproject-toml/#license for details.
              ********************************************************************************

      !!
        self._finalize_license_expression()
      running bdist_wheel
      running build
      running build_py
      creating build/lib.linux-x86_64-cpython-312/unrardll
      copying src/unrardll/__init__.py -> build/lib.linux-x86_64-cpython-312/unrardll
      running build_ext
      building 'unrardll.unrar' extension
      creating build/temp.linux-x86_64-cpython-312/src/unrardll
      x86_64-linux-gnu-g++ -fno-strict-overflow -Wsign-compare -DNDEBUG -g -O2 -Wall -fPIC -DSILENT=1 -DRARDLL=1 -DUNRAR=1 -D_UNIX=1 -I/var/WD_200GB/calibre.raita.xyz/Calibre-Web/calibre-web/calibre-web-env/include -I/usr/include/python3.12 -c src/unrardll/wrapper.cpp -o build/temp.linux-x86_64-cpython-312/src/unrardll/wrapper.o
      src/unrardll/wrapper.cpp:19:10: fatal error: unrar/dll.hpp: No such file or directory
         19 | #include <unrar/dll.hpp>
            |          ^~~~~~~~~~~~~~~
      compilation terminated.
      error: command '/usr/bin/x86_64-linux-gnu-g++' failed with exit code 1
      [end of output]

  note: This error originates from a subprocess, and is likely not a problem with pip.
  ERROR: Failed building wheel for unrardll
Failed to build unrardll
ERROR: Could not build wheels for unrardll, which is required to install pyproject.toml-based projects

I would appreciate if someone could shed some light as to what am I doing wrong and how can I correctly install unrardll.

Many thanks!