# Generate Computer Modern Unicode font files for use with groff
# https://cm-unicode.sourceforge.io/

VERSION := 0.7.0
HASH    := f7c9209524dfe1dd40e680139645d07b2c34b187a4121ec444909d6429e2c76e
URL     := https://sourceforge.net/projects/cm-unicode/files/cm-unicode/$(VERSION)

FONT_ARCHIVE := cm-unicode-$(VERSION)-pfb.tar.xz

CURL := curl
CURL_FLAGS := --disable --location --progress-bar
AWK  := gawk
ENV  := /usr/bin/env
SHASUM := shasum
AFMTODIT := afmtodit

GROFF ?= $(shell which groff)
GROFF_FLAGS := 
DEVPS_DIR := $(dir $(GROFF))../share/groff/current/font/devps
include $(DEVPS_DIR)/generate/Makefile
srcdir := $(DEVPS_DIR)/generate
afmdir := .

cm-unicode-$(VERSION): download

download: $(FONT_ARCHIVE)

$(FONT_ARCHIVE):
	@# Download sources
	$(CURL) $(CURL_FLAGS) --output $@ $(URL)/$@/download
	@# Verify download
	echo "$(HASH)  $(FONT_ARCHIVE)" | $(SHASUM) -c
	@# Unpack sources
	tar Jxf $@

FONTS = $(basename $(notdir $(wildcard cm-unicode-$(VERSION)/*.pfb)))
fonts: $(FONTS)

FONT_STYLES  := R I B BI Roman Italic Bold BoldItalic

CMUSerif := CMUClassicalSerifItalic CMUSerifClassicalItalic $(addprefix CMUSerif, $(FONT_STYLES) RomanSlanted BoldSlanted BoldNonextended UprightItalic)
CMUSerifR CMUSerifRoman: cmunrm
CMUSerifI CMUSerifItalic: cmunti
CMUSerifB CMUSerifBold: cmunbx
CMUSerifBI CMUSerifBoldItalic: cmunbi
CMUSerifRomanSlanted: cmunsl
CMUSerifBoldSlanted: cmunbl
CMUSerifBoldNonextended: cmunrb
CMUSerifUprightItalic: cmunui
CMUSerifClassicalItalic CMUClassicalSerifItalic: cmunci

CMUSansSerif := CMUSansSerif $(addprefix CMUSansSerif, $(FONT_STYLES) RomanSlanted DemiCondensed Oblique BoldOblique)
CMUSansSerifR CMUSansSerifRoman CMUSansSerif: cmunss
CMUSansSerifI CMUSansSerifItalic CMUSansSerifOblique: cmunsi
CMUSansSerifB CMUSansSerifBold: cmunsx
CMUSansSerifBI CMUSansSerifBoldItalic CMUSansSerifBoldOblique: cmunso
CMUSansSerifRomanSlanted: cmunsl
CMUSansSerifDemiCondensed: cmunssdc

CMUBright := $(addprefix CMUBright, $(FONT_STYLES) Oblique BoldOblique SemiBold SemiBoldOblique)
CMUBrightR CMUBrightRoman: cmunbmr
CMUBrightI CMUBrightItalic CMUBrightOblique: cmunbmo
CMUBrightB CMUBrightBold: cmunbbx
CMUBrightBI CMUBrightBoldItalic CMUBrightBoldOblique: cmunbxo
CMUBrightSemiBold: cmunbsr
CMUBrightSemiBoldOblique: cmunbso

CMUTypewriter := $(addprefix CMUTypewriter, $(FONT_STYLES) Regular Oblique Light LightOblique Variable VariableItalic)
CMUTypewriterR CMUTypewriterRoman CMUTypewriterRegular: cmuntt
CMUTypewriterI CMUTypewriterItalic: cmunit
CMUTypewriterB CMUTypewriterBold: cmuntb
CMUTypewriterBI CMUTypewriterBoldItalic: cmuntx
CMUTypewriterOblique: cmunst
CMUTypewriterLight: cmunbtl
CMUTypewriterLightOblique: cmunbto
CMUTypewriterVariable: cmunvt
CMUTypewriterVariableItalic: cmunvi

CMUConcrete := $(addprefix CMUConcrete, $(FONT_STYLES))
CMUConcreteR CMUConcreteRoman: cmunorm
CMUConcreteI CMUConcreteItalic: cmunoti
CMUConcreteB CMUConcreteBold: cmunobx
CMUConcreteBI CMUConcreteBoldItalic: cmunobi

ALIASES := $(CMUSerif) $(CMUSansSerif) $(CMUBright) $(CMUTypewriter) $(CMUConcrete)
aliases: $(ALIASES)
$(ALIASES): | devps devpdf
	sed -e '/^name/s/$</$@/' cm-unicode-$(VERSION)/$< > cm-unicode-$(VERSION)/$@
	ln -sf ../cm-unicode-$(VERSION)/$@ devps/$@
	ln -sf ../cm-unicode-$(VERSION)/$@ devpdf/$@

$(FONTS): | devps devpdf
	@# Generate groff font files and symlink to them in the respective device directories
	cd cm-unicode-$(VERSION); \
		$(AFMTODIT) -s $(EFLAG) $(RFLAG) $@.afm $(TEXTMAP) $@; \
		ln -sf ../cm-unicode-$(VERSION)/$@ ../devpdf; ln -sf ../cm-unicode-$(VERSION)/$@ ../devps
	@# Generate download files for generated groff fonts
	$(AWK) \
		-vdir=../cm-unicode-$(VERSION)/ \
		'/^name/{pf="$@.pfb"} /^internalname/{i=$$2} END{print i "\t" dir pf}' devps/$@ \
		| tee -a devps/download \
		| sed -e 's/^/\t/' >> devpdf/download

devps devpdf:
	mkdir -p $@