From 0ccff951e58fdf1a71b474eb5ecbe2d1c2030fce Mon Sep 17 00:00:00 2001
From: Egor Tensin <Egor.Tensin@gmail.com>
Date: Wed, 7 Apr 2021 03:16:04 +0300
Subject: Makefile: best practices

---
 Makefile | 31 +++++++++++++++++++++++--------
 1 file changed, 23 insertions(+), 8 deletions(-)

diff --git a/Makefile b/Makefile
index 8fa8373..d6ec2d1 100644
--- a/Makefile
+++ b/Makefile
@@ -1,32 +1,47 @@
 MAKEFLAGS += --no-builtin-rules --no-builtin-variables --warn-undefined-variables
+unexport MAKEFLAGS
 .DEFAULT_GOAL := all
 .DELETE_ON_ERROR:
 .SUFFIXES:
 SHELL := bash
 .SHELLFLAGS := -eu -o pipefail -c
 
+.PHONY: DO
+DO:
+
+escape = $(subst ','\'',$(1))
+
+define noexpand
+ifeq ($$(origin $(1)),environment)
+    $(1) := $$(value $(1))
+endif
+ifeq ($$(origin $(1)),environment override)
+    $(1) := $$(value $(1))
+endif
+ifeq ($$(origin $(1)),command line)
+    override $(1) := $$(value $(1))
+endif
+endef
+
 MKDIR := mkdir -p --
-RMDIR := $(RM) -r --
+RMDIR := rm -r --
 
 name := cv
 pdf := $(name)/$(name).pdf
 
-.PHONY: DO
-DO:
-
 .PHONY: all
 all: $(pdf)
 
 $(pdf): $(name).tex img/selfie_face.jpg | $(name)/
-	pdflatex -interaction=nonstopmode -halt-on-error -output-directory=$(name)/ $<
+	pdflatex -interaction=nonstopmode -halt-on-error '-output-directory=$(call escape,$(name))/' '$(call escape,$<)'
 
 %/:
-	$(MKDIR) $@
+	$(MKDIR) '$(call escape,$@)'
 
 .PHONY: clean
 clean:
-	find $(name) '!' -name cv.pdf -type f -delete
+	find '$(call escape,$(name))' '!' -name cv.pdf -type f -delete
 
 .PHONY: clean-all
 clean-all:
-	$(RMDIR) $(name)/
+	$(RMDIR) '$(call escape,$(name))/'
-- 
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