Flow and step for opening designs in Magic

[donn]

Steps

• New step, Magic.OpenGUI, which opens either DEF files or GDS files in magic
• Magic.*
  • Fixed magicrc being abspath'd before command invocation (breaks reproducibles)
  • _MAGIC_SCRIPT is now set in prepare_env instead of run_subprocess (so it can be intercepted for reproducibles)
• KLayout.OpenGUI
  • Renamed KLAYOUT_PRIORITIZE_GDS to KLAYOUT_GUI_USE_GDS to be consistent with the Magic steps

Flows

• New mono-step flow, OpenInMagic, which runs Magic.OpenGUI

Tool Updates

• OpenLane 2 now uses nix-eda for some of its derivations
• Magic now uses tk with X11 on macOS, to prevent crashes when attempting to use the GUI
• Updated Magic to 8.3.483/291ba96

Misc Bugfixes/Enhancements

• openlane.steps.Step.create_reproducible
  • PDK_ROOT now included if the PDK is included but not flattened so Magic steps can work
• openlane.steps.TclStep
  • Internal: Internal environment variables prefixed with _ are no longer rerouted to _env.tcl, instead being passed raw (to help with creating reproducibles)

[openlane-bot]

Metric comparisons are in beta. Please report bugs under the issues tab.

To create this report yourself, grab the metrics artifact from the CI run, extract them, and invoke python3 -m openlane.common.metrics compare-main <path to directory>.

• Changes to critical metrics were detected in the following designs:
  • sky130A/sky130_fd_sc_hd/aes_upw_new
  • sky130A/sky130_fd_sc_hd/aes_upw_old

Full tables ► https://gist.github.com/openlane-bot/4d54e593d0fd68b52199a45d09d7187e