libgourou: init at 0.8.1

[sevenautumns]

Description of changes

libgourou is a library for removing DRM from Adobe ebooks.
This superseeds the stale #179678 pr, and requires less patches

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandbox = true set in nix.conf? (See Nix manual)
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 23.05 Release Notes (or backporting 22.11 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md.

[dadada]

Sadly I don't own any ADEPT DRM protected files, so I can't confirm all binaries are working as intended. The PR looks fine otherwise.

[sevenautumns]

Sadly I don't own any ADEPT DRM protected files, so I can't confirm all binaries are working as intended. The PR looks fine otherwise.

This can easily be tested with adobe's free sample books
Here simply download any ebook provided as an acsm file.
(For example "The Adventures of Sherlock Holmes")

# Use an anonymous user and generate .adept folder
adept_activate --anonymous
# Download epub file through acsm
acsmdownloader ~/Downloads/URLLink.acsm
# Remove DRM
adept_remove The\ Adventures\ of\ Sherlock\ Holmes.epub
# Next remove will fail
adept_remove The\ Adventures\ of\ Sherlock\ Holmes.epub

[dadada]

This can easily be tested with adobe's free sample books Here simply download any ebook provided as an acsm file. (For example "The Adventures of Sherlock Holmes")

That works using anonymous activation.

[sevenautumns]

@thiagokokada
Since you reviewed the preceding #179678 pr, could I ask for a review of this one as well?

[thiagokokada]

Please introduce each package in separate commits:

updfparser: init at unstable-2023-01-10
libgourou: init at 0.8.1

[sevenautumns]

Thanks for the review @thiagokokada. I've applied all of your suggestions while some look a little different due to my formatter.