Switch to new build system.

This new system works based on rules generation, rather than hand-
constructed make rules. This is derived from the makefile found in
the statcheck repository at chocolate-doom/statcheck@4d1182db1b.

Part of #3.

.gitignore

@@ -0,0 +1 @@
+.rules

GNUmakefile

@@ -1,120 +1,60 @@
+#
+# Copyright (C) 2024 Simon Howard
+#
+# This program is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by the
+# Free Software Foundation; either version 2 of the License, or (at your
+# option) any later version. This program is distributed in the hope that
+# it will be useful, but WITHOUT ANY WARRANTY; without even the implied
+# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+#
 
-export SOURCE_PORT=/usr/games/chocolate-doom
+export SDL_VIDEODRIVER = dummy
 
-# Quiet output, convert to lower case, don't restore timestamps,
-# overwrite without prompt, extract to extract/ directory.
-UNZIPOPTS = -q -LL -o -d extract
+SOURCE_PORT_NAME = chocolate-doom
+SOURCE_PORT := $(shell which $(SOURCE_PORT_NAME) || echo missing_source_port)
+DOOMOPTS = -mb 16 -nodraw -noblit -nosound \
+           -noautoload -nogui -nograbmouse -nofullscreen
 
-OUTPUTS =
-WADS = extract/miniwad.wad
+ALL_DEMOS = $(patsubst %,demos/%,$(shell cat demos.txt))
+OUTPUTS = $(subst .lmp,.txt,$(subst demos/,output/,$(ALL_DEMOS)))
+UNZIPOPTS = -L -o
 
-all: check
+check: expected output
+	diff -x .gitignore -u -r expected output
+	@echo all tests passed
+
+output: $(OUTPUTS)
+
+missing_source_port:
+	@echo "Failed to find" $(SOURCE_PORT_NAME) "in PATH."
+	@echo "To specify the path explicitly:"
+	@echo "  make SOURCE_PORT=/path/to/$(SOURCE_PORT_NAME)"
+	@echo "Or to search for a different source port:"
+	@echo "  make SOURCE_PORT_NAME=lemon-doom"
+	@false
+
+.rules: makerules
+	./makerules $@
 
 extract/%:
-	unzip $(UNZIPOPTS) $< $(subst extract/,,$@)
+	unzip $(UNZIPOPTS) -d extract $< $(notdir $@)
 	@touch $@
 
-extract/miniwad.wad: miniwad.zip
-testrunner: $(SOURCE_PORT) extract/miniwad.wad
-
-# Alien Vendetta, Ancalagon 4:13:37
 extract/av.wad: pwads/av_new.zip
-extract/30av-25337.lmp: demos/avall-41337.zip
-
-output/av.txt: testrunner extract/av.wad extract/30av-25337.lmp
-	./testrunner -merge av.wad -timedemo extract/30av-25337.lmp >$@
-
-WADS += extract/av.wad
-OUTPUTS += output/av.txt
-
-# Cyberdreams, SuperWeaponDude 19:04
 extract/cyber110.wad: pwads/cydreams.zip
 extract/cyber110.deh: pwads/cydreams.zip
-extract/30cyx1904.lmp: demos/cyallx1904.zip
-
-output/cydreams.txt: testrunner extract/cyber110.wad extract/cyber110.deh extract/30cyx1904.lmp
-	./testrunner -deh cyber110.deh -merge cyber110.wad -timedemo extract/30cyx1904.lmp >$@
-
-WADS += extract/cyber110.wad
-OUTPUTS += output/cydreams.txt
-
-# Doom 2 The Way Id Did, William "crate" Striegl 45:25
 extract/d2twid.wad: pwads/d2twid.zip
-extract/30id-4525.lmp: demos/30id-4525.zip
-
-output/d2twid.txt: testrunner extract/d2twid.wad extract/30id-4525.lmp
-	./testrunner -nodehlump -merge d2twid.wad -timedemo extract/30id-4525.lmp >$@
-
-WADS += extract/d2twid.wad
-OUTPUTS += output/d2twid.txt
-
-# Eternal Doom, ELMLE 2:18:54
 extract/eternall.wad: pwads/eternal.zip
-extract/30et-13854.lmp: demos/etall-21854.zip
-
-output/eternal.txt: testrunner extract/eternall.wad extract/30et-13854.lmp
-	./testrunner -merge eternall.wad -timedemo extract/30et-13854.lmp >$@
-
-WADS += extract/eternall.wad
-OUTPUTS += output/eternal.txt
-
-# Hell Revealed, Yonatan Donner/Haggay Niv 43:39
 extract/hr.wad: pwads/hr.zip
-extract/hqr-4339.lmp: demos/hrall-4339.zip
-
-output/hr.txt: testrunner extract/hr.wad extract/hqr-4339.lmp
-	./testrunner -merge hr.wad -timedemo extract/hqr-4339.lmp >$@
-
-WADS += extract/hr.wad
-OUTPUTS += output/hr.txt
-
-# Hell Revealed 2, tchkb 2:29:44
 extract/hr2final.wad: pwads/hr2final.zip
-extract/h2alls2-22944.lmp: demos/h2all-22944.zip
-
-output/hr2.txt: testrunner extract/hr2final.wad extract/h2alls2-22944.lmp
-	./testrunner -merge hr2final.wad -timedemo extract/h2alls2-22944.lmp >$@
-
-WADS += extract/hr2final.wad
-OUTPUTS += output/hr2.txt
-
-# Memento Mori, stx-Vile 83:56
 extract/mm.wad: pwads/mm_allup.zip
-extract/30mm8356.lmp: demos/30mm8356.zip
-
-output/mm.txt: testrunner extract/mm.wad extract/30mm8356.lmp
-	./testrunner -merge mm.wad -timedemo extract/30mm8356.lmp >$@
-
-WADS += extract/mm.wad
-OUTPUTS += output/mm.txt
-
-# Memento Mori 2, Cyberdemon531 49:38
 extract/mm2.wad: pwads/mm2.zip
-extract/mm2allnomo4938.lmp: demos/m2allo4938.zip
-
-output/mm2.txt: testrunner extract/mm2.wad extract/mm2allnomo4938.lmp
-	./testrunner -merge mm2.wad -timedemo extract/mm2allnomo4938.lmp >$@
-
-WADS += extract/mm2.wad
-OUTPUTS += output/mm2.txt
-
-# Plutonia 2, Red-XIII 1:05:04
 extract/pl2.wad: pwads/pl2.zip
-extract/pl2all1.lmp: demos/p2all-6504.zip
-
-output/pl2.txt: testrunner extract/pl2.wad extract/pl2all1.lmp
-	./testrunner -gameversion final -merge pl2.wad -timedemo extract/pl2all1.lmp >$@
-
-WADS += extract/pl2.wad
-OUTPUTS += output/pl2.txt
-
-
-wads: $(WADS)
-
-check: $(OUTPUTS)
-	@diff -q -x .gitignore -r expected output && echo all tests passed
 
 clean:
-	rm -rf output/* extract/*
+	rm -f extract/*.wad
+	rm -rf output/*
+	rm -f .rules
 
-.PHONY: wads check clean all
+include .rules

demos.txt

@@ -0,0 +1,9 @@
+av/30av-25337.lmp
+cydreams/30cyx1904.lmp
+d2twid/30id-4525.lmp
+eternal/30et-13854.lmp
+hr/hqr-4339.lmp
+hr2/h2alls2-22944.lmp
+mm2/mm2allnomo4938.lmp
+mm/30mm8356.lmp
+pl2/pl2all1.lmp