added a makefile

makefile

@@ -0,0 +1,91 @@
+#* Note: Comments that start with ## before a command will be used as help
+#*       documentation when someone types `make help`
+
+## Install Herbie into current virtual environment
+install:
+	pip install -e .
+
+## Format files using Black
+format:
+	black .
+
+## Pull updates from main branch
+pull:
+	git pull origin main
+
+## Create a new conda environment `herbie`
+conda-create:
+	conda env create -f environment.yml
+
+## Update the `herbie` conda environment
+conda-update:
+	conda env update -f environment.yml --prune
+
+## Remove the `herbie` conda environment
+conda-remove:
+	conda env remove --name herbie
+
+## Clean the current conda environment
+conda-clean:
+	conda clean -tp
+
+###############################################################################
+# Self Documenting Commands
+###############################################################################
+# From https://github.com/duarteocarmo/boilerplate/blob/master/Makefile
+# See also: https://duarteocarmo.com/blog/opinionated-python-boilerplate
+
+.DEFAULT_GOAL := help
+
+# Inspired by <http://marmelab.com/blog/2016/02/29/auto-documented-makefile.html>
+# sed script explained:
+# /^##/:
+# 	* save line in hold space
+# 	* purge line
+# 	* Loop:
+# 		* append newline + line to hold space
+# 		* go to next line
+# 		* if line starts with doc comment, strip comment character off and loop
+# 	* remove target prerequisites
+# 	* append hold space (+ newline) to line
+# 	* replace newline plus comments by `---`
+# 	* print line
+# Separate expressions are necessary because labels cannot be delimited by
+# semicolon; see <http://stackoverflow.com/a/11799865/1968>
+.PHONY: help
+help:
+	@echo "$$(tput bold)Available commands:$$(tput sgr0)"
+	@sed -n -e "/^## / { \
+		h; \
+		s/.*//; \
+		:doc" \
+		-e "H; \
+		n; \
+		s/^## //; \
+		t doc" \
+		-e "s/:.*//; \
+		G; \
+		s/\\n## /---/; \
+		s/\\n/ /g; \
+		p; \
+	}" ${MAKEFILE_LIST} \
+	| awk -F '---' \
+		-v ncol=$$(tput cols) \
+		-v indent=19 \
+		-v col_on="$$(tput setaf 6)" \
+		-v col_off="$$(tput sgr0)" \
+	'{ \
+		printf "%s%*s%s ", col_on, -indent, $$1, col_off; \
+		n = split($$2, words, " "); \
+		line_length = ncol - indent; \
+		for (i = 1; i <= n; i++) { \
+			line_length -= length(words[i]) + 1; \
+			if (line_length <= 0) { \
+				line_length = ncol - indent - length(words[i]) - 1; \
+				printf "\n%*s ", -indent, " "; \
+			} \
+			printf "%s ", words[i]; \
+		} \
+		printf "\n"; \
+	}' \
+	| more $(shell test $(shell uname) = Darwin && echo '--no-init --raw-control-chars')