This improves on the previous verison of this script.

Previously it only accepted one attr, and required
explicit passing of the "broken" value.

This script is meant to be used to mark failing hydra builds as broken in the meta attrs
To use the script, you should pass the list of failing attrs as arguments to the script.

Example: cat failing-attrs | xargs ./pkgs/common-update/scripts/mark-broken

Generating a list of failing attrs: (this should be improved at a later date)

• Go to the most recent hydra evaluation with all builds completed
• Select the "builds still failing" tab
• Highlight and select all packages, should be prefixed with nixpkgs.
• Use regex and editor foo to leave only the attr names
• Use the above example command to then execute the script

OTHER NOTES:

• The denyFileList and denyAttrList will likely need to be updated slightly
  to align with the conventions used in nixpkgs at execution time
• Any attrs which failed for any reason will be written to failed-marks.txt.
  Those attrs will likely need manual attention as disablement will likely be conditional.

Motivation for this change

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS linux)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Determined the impact on package closure size (by running nix path-info -S before and after)
• Ensured that relevant documentation is up to date
• Fits CONTRIBUTING.md.