update the open_pdks version

export PYTHONPATH in OpenLane Docker file
Document KLayout DRC variables

dependencies/tool_metadata.yml

@@ -64,6 +64,6 @@
   in_install: false
 - name: open_pdks
   repo: https://github.com/RTimothyEdwards/open_pdks
-  commit: e0f692f46654d6c7c99fc70a0c94a080dab53571
+  commit: cd1748bb197f9b7af62a54507de6624e30363943
   in_install: false
   pdk: true

docs/source/reference/pdk_configuration.md

@@ -58,6 +58,8 @@ you're doing.
 | `KLAYOUT_PROPERTIES` | Points to the klayout properties file (.lyp). |
 | `KLAYOUT_DEF_LAYER_MAP` | Points to klayout deflef layer map file (.map). |
 | `KLAYOUT_XOR_IGNORE_LAYERS` | A space separated layers list to ignore during klayout xor check. |
+| `KLAYOUT_DRC_RUNSET` | A path to KLayout DRC runset. |
+| `KLAYOUT_DRC_OPTIONS` | Options availble to KLayout DRC runset. They vary from one PDK to another. |
 | `MAGIC_MAGICRC` | Points to the magicrc file that is sourced while running magic in the flow. |
 | `GPIO_PADS_LEF` | A list of the pads lef views. For example:`[glob "$::env(PDK_ROOT)/sky130A/libs.ref/sky130_fd_io/lef/sky130_fd_io.lef"]` |
 | `GPIO_PADS_PREFIX` | A list of pad cells name prefixes. |

scripts/tcl_commands/klayout.tcl

@@ -126,7 +126,6 @@ proc run_klayout_drc_sky130 {args} {
             -rd seal=$seal \
             -rd thread=$threads \
 			|& tee $::env(TERMINAL_OUTPUT) $drc_log
-        set ::env(PYTHONPATH) /build/lib/python3/dist-packages
         try_exec python3 \
             $::env(SCRIPTS_DIR)/klayout/xml_drc_report_to_json.py \
             --xml-file $xml_report \