Generate rules instead of dependencies.

This allows the testrunner script to be eliminated, and on one of my
lower-spec machines this makes a significant difference because Python
startup can be slow, and it's now not necessary to invoke it for every
run.

.gitignore

@@ -1 +1 @@
-.depends
+.rules

GNUmakefile

@@ -28,8 +28,8 @@ output/%.txt: demos/%.lmp $(SOURCE_PORT)
 	@mkdir -p $(dir $@)
 	@./testrunner $< $@
 
-.depends: makedepends
-	./makedepends $@
+.rules: makerules
+	./makerules $@
 
 extract/%:
 	unzip $(UNZIPOPTS) -d extract $< $(notdir $@)
@@ -45,6 +45,6 @@ extract/class_ep.wad: pwads/class_ep.zip
 clean:
 	rm -f extract/*.wad
 	rm -rf output/*
-	rm -f .depends
+	rm -f .rules
 
-include .depends
+include .rules

common.py

@@ -1,27 +0,0 @@
-#
-# 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.
-#
-
-from os.path import dirname, join, exists
-import yaml
-
-def read_config(path):
-    if path == '':
-        return {}
-
-    # Config deeper in the hierarchy can override config files from
-    # higher up in the hierarchy:
-    result = read_config(dirname(path))
-    config_file = join(path, ".democonfig")
-    if exists(config_file):
-        with open(config_file) as f:
-            result.update(yaml.safe_load(f))
-
-    return result

makedepends

@@ -1,41 +0,0 @@
-#!/usr/bin/env python3
-#
-# 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.
-#
-
-from glob import glob
-import os
-from os.path import exists, join
-import sys
-
-from common import *
-
-depends_file = sys.argv[1]
-dependencies = {}
-
-for filename in glob("expected/**/*.txt", recursive=True):
-    lmp_file = filename.replace("expected/", "demos/").replace(".txt", ".lmp")
-    cfg = read_config(lmp_file)
-
-    depends = [join("iwads", cfg["iwad"])]
-
-    pwad = cfg.get("pwad")
-    if pwad is not None:
-        depends.append(os.path.join("extract", pwad))
-
-    out_file = filename.replace("expected/", "output/")
-    dependencies[out_file] = depends
-
-with open(depends_file, "w") as f:
-    for out_file, depends in sorted(dependencies.items()):
-        out_file = out_file.replace("#", "\\#")
-        f.write("%s: %s\n" % (
-            out_file, " ".join(depends),
-        ))

makerules

@@ -0,0 +1,89 @@
+#!/usr/bin/env python3
+#
+# 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.
+#
+
+from glob import glob
+import os
+from os.path import dirname, basename, exists, join
+import shlex
+import sys
+import yaml
+
+def escape_filename(filename):
+    return filename.replace("#", "\\#")
+
+def read_config(path):
+    if path == '':
+        return {}
+
+    # Config deeper in the hierarchy can override config files from
+    # higher up in the hierarchy:
+    result = read_config(dirname(path))
+    config_file = join(path, ".democonfig")
+    if exists(config_file):
+        with open(config_file) as f:
+            result.update(yaml.safe_load(f))
+
+    return result
+
+class Rule:
+    def __init__(self, expect_file):
+        self.out_file = expect_file.replace("expected/", "output/")
+        self.lmp_file = (
+            expect_file.replace("expected/", "demos/")
+                       .replace(".txt", ".lmp"))
+        self.cfg = read_config(self.lmp_file)
+
+    def dependencies(self):
+        yield self.lmp_file
+        yield "$(SOURCE_PORT)"
+        yield join("iwads", self.cfg["iwad"])
+
+        pwad = self.cfg.get("pwad")
+        if pwad is not None:
+            yield join("extract", pwad)
+
+    def game_arguments(self):
+        result = [
+            "$(DOOMOPTS)",
+            "-statdump", "$@",
+            "-iwad", join("iwads", self.cfg["iwad"]),
+            "-timedemo", "$<"
+        ]
+
+        if "gameversion" in self.cfg:
+            result.extend(("-gameversion", self.cfg["gameversion"]))
+
+        if "pwad" in self.cfg:
+            result.extend(("-file", join("extract", self.cfg["pwad"])))
+
+        return result
+
+    def command(self):
+        args = self.game_arguments()
+        return "$(SOURCE_PORT) " + " ".join(args) + " >/dev/null 2>&1"
+
+    def rule_output(self):
+        result = "%s: %s\n" % (
+            escape_filename(self.out_file), " ".join(
+                escape_filename(f) for f in self.dependencies()),
+        )
+        result += "\t@mkdir -p %s\n" % (shlex.quote(dirname(self.out_file)))
+        result += "\t%s || true\n\n" % self.command()
+        return result
+
+depends_file = sys.argv[1]
+rules = []
+
+with open(depends_file, "w") as f:
+    for filename in sorted(glob("expected/**/*.txt", recursive=True)):
+        r = Rule(filename)
+        f.write(r.rule_output())

testrunner

@@ -1,40 +0,0 @@
-#!/usr/bin/env python3
-#
-# 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.
-#
-
-import os
-from os.path import join
-import shlex
-import sys
-
-from common import *
-
-source_port = os.getenv("SOURCE_PORT")
-assert source_port != "", "SOURCE_PORT environment variable not set."
-lmp_file, out_file = sys.argv[1:]
-cfg = read_config(lmp_file)
-
-args = [
-    source_port,
-    "-iwad", join("iwads", cfg["iwad"]),
-    "-statdump", out_file,
-    "-timedemo", lmp_file,
-] + shlex.split(os.getenv("DOOMOPTS", ""))
-
-if "gameversion" in cfg:
-    args.extend(("-gameversion", cfg["gameversion"]))
-
-if "pwad" in cfg:
-    args.extend(("-file", join("extract", cfg["pwad"])))
-
-command = shlex.join(args) + " >/dev/null 2>&1"
-print(command)
-os.system(command)