Use new action

The GitHub FuseSoC action is revamped and able to run openlane
examples created by us (still needs more generalization).

.github/workflows/ci.yml

@@ -6,10 +6,11 @@ jobs:
     steps:
       - name: Checkout subservient
         uses: actions/checkout@v2
+      - name: Build with Openlane
+        uses: librecores/ci-fusesoc-action@migrate-dockerized
         with:
-          path: subservient
-      - run: echo "EDALIZE_LAUNCHER='eda-container-wrapper --split-cwd-tail=1 --non-interactive openlane --'" >> $GITHUB_ENV
-      - run: pip3 install fusesoc eda-container-wrapper
-      - run: fusesoc library add serv https://github.com/olofk/serv
-      - run: fusesoc library add subservient $GITHUB_WORKSPACE/subservient
-      - run: fusesoc run --target=sky130 subservient
+          libraries: https://github.com/olofk/serv
+          core: subservient
+          target: sky130
+          tool: openlane
+

openlane_runner.py

@@ -0,0 +1,38 @@
+#!/usr/bin/python3
+
+#This script is a launcher script for Edalize
+#Normally Edalize will launch the EDA tools directly, but if the
+#EDALIZE_LAUNCHER environmnet variable is set and points to an executable file,
+#this file will be called with the command-line that Edalize would otherwise
+#have launched.
+#
+#This allows us to define a custom launcher, as in this case where we intercept
+#the call to flow.tcl (the entry point to the openlane flow) and start up a
+#container. If Edalize wants to execute other applications, we just start them
+#the normal way
+
+import os
+import subprocess
+import sys
+
+def enverr(e):
+    print(f"Error: Openlane backend needs environment variable '{e}' to be set")
+    exit(1)
+
+if 'flow.tcl' in sys.argv[1]:
+    pdk_root      = os.environ.get('PDK_ROOT') or enverr('PDK_ROOT')
+    (build_root, work) = os.path.split(os.getcwd())
+
+    image = "efabless/openlane:v0.12"
+
+    prefix = ["docker", "run",
+              "-v", f"{pdk_root}:{pdk_root}",
+              "-v", f"{build_root}:/project",
+              "-e", f"PDK_ROOT={pdk_root}",
+              "-u", f"{os.getuid()}:{os.getgid()}",
+              "-w", f"/project/{work}",
+              image]
+    sys.exit(subprocess.call(prefix+sys.argv[1:]))
+else:
+    sys.exit(subprocess.call(sys.argv[1:]))
+