infra: Convert Makefile to use SymbiFlow's make-env setup.

Use https://github.com/SymbiFlow/make-env to set up the conda
environment correctly.

Fixes #46.

Signed-off-by: Tim 'mithro' Ansell <me@mith.ro>

.gitmodules

@@ -1,3 +1,7 @@
+[submodule "third_party/make-env"]
+	path = third_party/make-env
+	url = https://github.com/SymbiFlow/make-env.git
+
 # sky130_fd_pr
 [submodule "libraries/sky130_fd_pr/latest"]
 	path = libraries/sky130_fd_pr/latest

Makefile

@@ -14,11 +14,25 @@
 #
 # SPDX-License-Identifier: Apache-2.0
 
-include scripts/make/git.mk
+# The top directory where environment will be created.
-include scripts/make/conda.mk
+TOP_DIR := $(realpath $(dir $(lastword $(MAKEFILE_LIST))))
+
+# A pip `requirements.txt` file.
+# https://pip.pypa.io/en/stable/reference/pip_install/#requirements-file-format
+REQUIREMENTS_FILE := requirements.txt
+
+# A conda `environment.yml` file.
+# https://docs.conda.io/projects/conda/en/latest/user-guide/tasks/manage-environments.html
+ENVIRONMENT_FILE := environment.yml
+
+$(TOP_DIR)/third_party/make-env/conda.mk: $(TOP_DIR)/.gitmodules
+	cd $(TOP_DIR); git submodule update --init third_party/make-env
+
+-include $(TOP_DIR)/third_party/make-env/conda.mk
 
 .DEFAULT_GOAL := all
 
+include $(TOP_DIR)/scripts/make/git.mk
 README.rst: README.src.rst docs/status.rst Makefile | $(CONDA_ENV_PYTHON)
 	@rm -f README.rst
 	$(IN_CONDA_ENV) rst_include include README.src.rst - \
@@ -52,7 +66,7 @@ check-licenses:
 
 .PHONY: check-licenses
 
-lint-python:
+lint-python: | $(CONDA_ENV_PYTHON)
 	$(IN_CONDA_ENV) flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
 
 .PHONY: lint-python

scripts/make/conda.mk

@@ -1,114 +0,0 @@
-# Copyright 2020 SkyWater PDK Authors
-#
-# 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
-#
-#     https://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
-
-
-SHELL := /bin/bash
-
-UNAME_S := $(shell uname -s)
-ifneq (, $(findstring Linux, $(UNAME_S)))
-        OSFLAG := Linux
-endif
-ifeq ($(UNAME_S), Darwin)
-        OSFLAG := MacOSX
-endif
-ifneq (, $(findstring Cygwin, $(UNAME_S)))
-        OSFLAG := Linux
-endif
-ifneq (, $(findstring MINGW, $(UNAME_S)))
-        OSFLAG := Linux
-endif
-
-MAKE_DIR          := $(dir $(lastword $(MAKEFILE_LIST)))
-TOP_DIR           := $(realpath $(MAKE_DIR)/../..)
-ENV_DIR           := $(TOP_DIR)/env
-REQUIREMENTS_FILE := $(TOP_DIR)/requirements.txt
-ENVIRONMENT_FILE  := $(TOP_DIR)/environment.yml
-
-CONDA_DIR         := $(ENV_DIR)/conda
-DOWNLOADS_DIR     := $(ENV_DIR)/downloads
-CONDA_PYTHON      := $(CONDA_DIR)/bin/python
-CONDA_PKGS_DIR    := $(DOWNLOADS_DIR)/conda-pkgs
-CONDA_PKGS_DEP    := $(CONDA_PKGS_DIR)/urls.txt
-CONDA_ENV_NAME    := skywater-pdk-scripts
-CONDA_ENV_PYTHON  := $(CONDA_DIR)/envs/$(CONDA_ENV_NAME)/bin/python
-IN_CONDA_ENV_BASE := source $(CONDA_DIR)/bin/activate &&
-IN_CONDA_ENV      := $(IN_CONDA_ENV_BASE) conda activate $(CONDA_ENV_NAME) &&
-
-$(ENV_DIR): | $(DOWNLOADS_DIR)
-	mkdir -p $(END_DIR)
-
-$(DOWNLOADS_DIR):
-	mkdir -p $(DOWNLOADS_DIR)
-
-$(DOWNLOADS_DIR)/Miniconda3-latest-$(OSFLAG)-x86_64.sh: | $(DOWNLOADS_DIR)
-	wget https://repo.anaconda.com/miniconda/Miniconda3-latest-$(OSFLAG)-x86_64.sh -O $(DOWNLOADS_DIR)/Miniconda3-latest-$(OSFLAG)-x86_64.sh
-	chmod a+x $(DOWNLOADS_DIR)/Miniconda3-latest-$(OSFLAG)-x86_64.sh
-
-$(CONDA_PKGS_DEP): $(CONDA_PYTHON)
-	$(IN_CONDA_ENV_BASE) conda config --system --add pkgs_dirs $(CONDA_PKGS_DIR)
-
-$(CONDA_PYTHON): $(DOWNLOADS_DIR)/Miniconda3-latest-$(OSFLAG)-x86_64.sh
-	$(DOWNLOADS_DIR)/Miniconda3-latest-$(OSFLAG)-x86_64.sh -p $(CONDA_DIR) -b -f
-	touch $(CONDA_PYTHON)
-
-$(CONDA_DIR)/envs: $(CONDA_PYTHON)
-	$(IN_CONDA_ENV_BASE) conda config --system --add envs_dirs $(CONDA_DIR)/envs
-
-$(CONDA_ENV_PYTHON): $(ENVIRONMENT_FILE) $(REQUIREMENTS_FILE) | $(CONDA_PYTHON) $(CONDA_DIR)/envs $(CONDA_PKGS_DEP)
-	$(IN_CONDA_ENV_BASE) conda env update --name $(CONDA_ENV_NAME) --file $(ENVIRONMENT_FILE)
-	touch $(CONDA_ENV_PYTHON)
-
-env: $(CONDA_ENV_PYTHON)
-	$(IN_CONDA_ENV) conda info
-
-.PHONY: env
-
-enter: $(CONDA_ENV_PYTHON)
-	$(IN_CONDA_ENV) bash
-
-.PHONY: enter
-
-clean:
-	rm -rf env/conda
-
-.PHONY: clean
-
-dist-clean:
-	rm -rf conda
-
-.PHONY: dist-clean
-
-
-FILTER_TOP = sed -e's@$(TOP_DIR)/@$$TOP_DIR/@'
-env-info:
-	@echo "             Top level directory is: '$(TOP_DIR)'"
-	@echo "              The version number is: '$$(git describe)'"
-	@echo "            Git repository is using: $$(du -h -s $(TOP_DIR)/.git | sed -e's/\s.*//')" \
-		| $(FILTER_TOP)
-	@echo
-	@echo "     Environment setup directory is: '$(ENV_DIR)'" \
-		| $(FILTER_TOP)
-	@echo "    Download and cache directory is: '$(DOWNLOADS_DIR)' (using $$(du -h -s $(DOWNLOADS_DIR) | sed -e's/\s.*//'))" \
-		| $(FILTER_TOP)
-	@echo "               Conda's directory is: '$(CONDA_DIR)' (using $$(du -h -s $(CONDA_DIR) | sed -e's/\s.*//'))" \
-		| $(FILTER_TOP)
-	@echo " Conda's packages download cache is: '$(CONDA_PKGS_DIR)' (using $$(du -h -s $(CONDA_PKGS_DIR) | sed -e's/\s.*//'))" \
-		| $(FILTER_TOP)
-	@echo "           Conda's Python binary is: '$(CONDA_ENV_PYTHON)'"\
-		| $(FILTER_TOP)
-
-
-.PHONY: info

third_party/make-env

@@ -0,0 +1 @@
+Subproject commit 9b07ad2bb62fbf8af789c9e4669715c974b4912d