Replace make does-path-have-reqs with better deps-reqs-versions

This fixes this long-broken task and enables an output that shows the
version at each path.

Author: colindean

Makefile

@@ -172,14 +172,28 @@ install-precommit: $(GIT_HOOKS) ## Sets up pre-commit hooks
 $(GIT_HOOKS): .pre-commit-config.yaml
 	$(PRECOMMIT) install
 
-.PHONY: does-path-have-reqs
-does-path-have-reqs: ## Check if shell $PATH has expected elements
-	@echo "$(COLOR_BLUE)Checking PATH elements for evidence of package managers…$(COLOR_RESET)"
-	@( (echo $${PATH} | grep -q poetry ) && echo "found poetry") || (echo "missing poetry" && false)
-	@( (echo $${PATH} | grep -q homebrew ) && echo "found homebrew") || (echo "missing homebrew" && false)
-	@( (echo $${PATH} | grep -q pyenv ) && echo "found pyenv") || (echo "missing pyenv" && false)
+.PHONY: deps-reqs-versions
+deps-reqs-versions: ## Check if shell $PATH has requirements and show their version
+	@echo "$(COLOR_BLUE)Checking PATH elements for evidence of package managers. The first in each section is what's used.$(COLOR_RESET)"
+	@$(MAKE) paths-version-for-cmd CMD=poetry
+	@$(MAKE) paths-version-for-cmd CMD=pyenv
+	@$(MAKE) paths-version-for-cmd CMD=brew
+	@$(MAKE) paths-version-for-cmd CMD=curl
+	@$(MAKE) paths-version-for-cmd CMD=git
 	@echo "$(COLOR_GREEN)All expected PATH elements found$(COLOR_RESET)"
 
+CMD_VERSION_FLAG ?= --version
+.PHONY: paths-version-for-cmd
+paths-version-for-cmd: ## Display version for all executable paths for an executable, set CMD & CMD_VERSION_FLAG
+	@( if [ -z "$$(which -a $(CMD))" ]; then \
+	     echo "==> $(COLOR_RED)missing $(CMD)$(COLOR_RESET)"; \
+	   else \
+	     echo "==> $(COLOR_ORANGE)$(CMD) $(COLOR_BLUE)commands' versions are:$(COLOR_RESET)"; \
+	     for pth in $$(which -a $(CMD)); do \
+		   echo "$(COLOR_BLUE)$${pth}$(COLOR_RESET) : $$("$${pth}" $(CMD_VERSION_FLAG))"; \
+		 done; \
+	   fi )
+
 ##@ Dependencies
 
 .PHONY: python-current