update openlane makefile
- remove symlink to caravel's openlane makefile
- add `openlane/Makefile`
- mantain history of openlane runs

Makefile

diff --git a/Makefile b/Makefile
index 54ec2a8..a9d1752 100644
--- a/Makefile
+++ b/Makefile
@@ -15,7 +15,7 @@
 # SPDX-License-Identifier: Apache-2.0
 MAKEFLAGS+=--warn-undefined-variables
 
-CARAVEL_ROOT?=$(PWD)/caravel
+export CARAVEL_ROOT?=$(PWD)/caravel
 PRECHECK_ROOT?=${HOME}/mpw_precheck
 MCW_ROOT?=$(PWD)/mgmt_core_wrapper
 SIM?=RTL
@@ -65,20 +65,14 @@
 simenv:
 	docker pull efabless/dv_setup:latest
 
-# this is a tmp workaround
-# [WARN] please remove in the future
-.PHONY: tmp-workaround
-tmp-workaround:
-	@sed 's%final_summary_report%*%' $(CARAVEL_ROOT)/openlane/Makefile  -i
-
 .PHONY: setup
-setup: install check-env install_mcw openlane pdk-with-volare tmp-workaround
+setup: install check-env install_mcw openlane pdk-with-volare
 
 # Openlane
 blocks=$(shell cd openlane && find * -maxdepth 0 -type d)
 .PHONY: $(blocks)
 $(blocks): % :
-	export CARAVEL_ROOT=$(CARAVEL_ROOT) && cd openlane && $(MAKE) $*
+	$(MAKE) -C openlane $*
 
 dv_patterns=$(shell cd verilog/dv && find * -maxdepth 0 -type d)
 dv-targets-rtl=$(dv_patterns:%=verify-%-rtl)

openlane/Makefile

diff --git a/openlane/Makefile b/openlane/Makefile
deleted file mode 120000
index 48e5b4a..0000000
--- a/openlane/Makefile
+++ /dev/null
@@ -1 +0,0 @@
-../caravel/openlane/Makefile
\ No newline at end of file

openlane/Makefile

diff --git a/openlane/Makefile b/openlane/Makefile
new file mode 100644
index 0000000..f6d3c93
--- /dev/null
+++ b/openlane/Makefile
@@ -0,0 +1,79 @@
+# SPDX-FileCopyrightText: 2020 Efabless Corporation
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+MAKEFLAGS+=--warn-undefined-variables
+
+export OPENLANE_RUN_TAG = $(shell date '+%y_%m_%d_%H_%M')
+OPENLANE_TAG ?= 2021.11.23_01.42.34
+OPENLANE_IMAGE_NAME ?= efabless/openlane:$(OPENLANE_TAG)
+designs = $(shell find * -maxdepth 0 -type d)
+current_design = null
+
+openlane_cmd = \
+	"flow.tcl \
+	-design $$(realpath ./$*) \
+	-save_path $$(realpath ..) \
+	-save \
+	-tag $(OPENLANE_RUN_TAG) \
+	-overwrite"
+openlane_cmd_interactive = "flow.tcl -it -file $$(realpath ./$*/interactive.tcl)"
+
+docker_mounts = \
+	-v $$(realpath $(PWD)/..):$$(realpath $(PWD)/..) \
+	-v $(PDK_ROOT):$(PDK_ROOT) \
+	-v $(CARAVEL_ROOT):$(CARAVEL_ROOT) \
+	-v $(OPENLANE_ROOT):/openlane
+
+docker_env = \
+	-e PDK_ROOT=$(PDK_ROOT) \
+	-e PDK=$(PDK) \
+	-e MISMATCHES_OK=1 \
+	-e CARAVEL_ROOT=$(CARAVEL_ROOT) \
+	-e OPENLANE_RUN_TAG=$(OPENLANE_RUN_TAG)
+
+ifneq ($(MCW_ROOT),)
+docker_env += -e MCW_ROOT=$(MCW_ROOT)
+docker_mounts += -v $(MCW_ROOT):$(MCW_ROOT)
+endif
+
+docker_startup_mode = $(shell test -t 0 && echo "-it" || echo "--rm" )
+docker_run = \
+	docker run $(docker_startup_mode) \
+	$(docker_mounts) \
+	$(docker_env) \
+	-u $(shell id -u $(USER)):$(shell id -g $(USER))
+
+list:
+	@echo $(designs)
+
+.PHONY: $(designs)
+$(designs) : export current_design=$@
+$(designs) : % : ./%/config.tcl
+ifneq (,$(wildcard ./$(current_design)/interactive.tcl))
+	$(docker_run) \
+		$(OPENLANE_IMAGE_NAME) sh -c $(openlane_cmd_interactive)
+else
+	# $(current_design)
+	mkdir -p ./$*/runs/$(OPENLANE_RUN_TAG) 
+	rm -rf ./$*/runs/$*
+	ln -s $$(realpath ./$*/runs/$(OPENLANE_RUN_TAG)) ./$*/runs/$*
+	$(docker_run) \
+		$(OPENLANE_IMAGE_NAME) sh -c $(openlane_cmd)
+endif
+	@mkdir -p ../signoff/$*/
+	@cp ./$*/runs/$*/OPENLANE_VERSION ../signoff/$*/
+	@cp ./$*/runs/$*/PDK_SOURCES ../signoff/$*/
+	@cp ./$*/runs/$*/reports/*.csv ../signoff/$*/
+