Add infrastructure for multi-file programs

infrastructure/Makefile

@@ -0,0 +1,27 @@
+ALL_SOURCES := $(filter-out combined.lua,$(wildcard *.lua))
+MAIN_SOURCE := main.lua
+TEST_SOURCES := $(filter test-%.lua,$(ALL_SOURCES))
+MODULE_SOURCES := $(filter-out $(MAIN_SOURCE) $(TEST_SOURCES),$(ALL_SOURCES))
+
+.PHONY : world
+world : combined.lua
+
+combined.lua : $(MAIN_SOURCE) $(MODULE_SOURCES) ../infrastructure/combine
+	../infrastructure/combine $(MAIN_SOURCE) $(MODULE_SOURCES) > $@
+
+.PHONY : check
+check : luacheck $(TEST_SOURCES:test-%.lua=check-%)
+
+.PHONY : luacheck
+luacheck : $(ALL_SOURCES)
+	luacheck $+
+
+.PHONY : $(TEST_SOURCES:test-%.lua=check-%)
+$(TEST_SOURCES:test-%.lua=check-%) : check-% : $(ALL_SOURCES)
+	luajit $(@:check-%=test-%.lua)
+
+.PHONY : clean
+clean :
+	$(RM) combined.lua
+
+.DELETE_ON_ERROR :

infrastructure/combine

@@ -0,0 +1,42 @@
+#!/bin/bash
+
+set -e
+set -u
+set -o pipefail
+
+cat << 'EOF'
+local require_cache = {}
+local function require(module_name)
+	local entry = require_cache[module_name]
+	if type(entry) == "function" then
+		entry = entry(module_name)
+		require_cache[module_name] = entry
+	end
+	return entry
+end
+
+EOF
+
+main_file="$1"
+shift
+
+for file in "$@"; do
+	echo 'require_cache["'"${file%.lua}"'"] = function(...)'
+	echo "--[["
+	echo "BEGIN CONTENTS OF ${file}"
+	echo "]]"
+	cat "${file}"
+	echo "--[["
+	echo "END CONTENTS OF ${file}"
+	echo "]]"
+	echo "end"
+	echo
+done
+
+echo "--[["
+echo "BEGIN CONTENTS OF ${main_file}"
+echo "]]"
+cat "${main_file}"
+echo "--[["
+echo "END CONTENTS OF ${main_file}"
+echo "]]"

luacheckrc

@@ -121,5 +121,11 @@ stds.luacontrollerwriteable = {
 	},
 }
 
-files["*.lua"].std = "sandboxcommon+luacontroller"
+stds.combinescript = {
+	read_globals = {
+		"require",
+	}
+}
+
+files["*.lua"].std = "sandboxcommon+luacontroller+combinescript"
 files["test-*.lua"].std = "sandboxcommonwriteable+luacontrollerwriteable+luajit"