feat: use librelane

Switch from OpenLane 2 to its successor, LibreLane.

Author: urish

.devcontainer/Dockerfile

@@ -23,5 +23,5 @@ RUN umask 022 && \
     tar zxf - -C /usr/local --strip-components=1 && \
     chmod 755 /usr/local/bin
 
-# Install openlane
-RUN pip3 install openlane==2.2.9
+# Install LibreLane
+RUN pip3 install librelane==2.4.2

.github/workflows/gds.yaml

@@ -17,7 +17,7 @@ jobs:
         uses: TinyTapeout/tt-gds-action@ttsky25a
         with:
           pdk: sky130
-          tools-ref: ttsky25a
+          tools-ref: main
 
   precheck:
     needs: gds
@@ -27,7 +27,7 @@ jobs:
         uses: TinyTapeout/tt-gds-action/precheck@ttsky25a
         with:
           pdk: sky130
-          tools-ref: ttsky25a
+          tools-ref: main
 
   gl_test:
     needs: gds

README.md

@@ -17,7 +17,7 @@ To learn more and get started, visit https://tinytapeout.com.
 3. Edit [docs/info.md](docs/info.md) and add a description of your project.
 4. Adapt the testbench to your design. See [test/README.md](test/README.md) for more information.
 
-The GitHub action will automatically build the ASIC files using [OpenLane](https://www.zerotoasiccourse.com/terminology/openlane/).
+The GitHub action will automatically build the ASIC files using [LibreLane](https://www.zerotoasiccourse.com/terminology/librelane/).
 
 ## Enable GitHub actions to build the results page
 

src/config.json

@@ -31,7 +31,7 @@
   "//": "https://tinytapeout.com/faq/#how-can-i-map-an-additional-external-clock-to-one-of-the-gpios",
   "CLOCK_PORT": "clk",
 
-  "//": "Configuration docs: https://openlane.readthedocs.io/en/latest/reference/configuration.html",
+  "//": "Configuration docs: https://librelane.readthedocs.io/en/latest/reference/configuration.html",
 
   "//": "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!",
   "//": "!!! DO NOT CHANGE ANYTHING BELOW THIS POINT !!!",