fix(build): Include modules for all supported Lua versions in dist

Makefile.am

@@ -7,24 +7,26 @@ else
 SUBDIRS = libtexpdf src
 endif
 
+SUPPORTED_LUAS = 5.3 5.2 5.1
+
 dist_man_MANS = sile.1
 bin_SCRIPTS = sile
-subdir_files = $(shell find core classes languages packages lua-libraries -type f -print)
-nobase_dist_pkgdata_DATA = $(subdir_files)
+nobase_dist_pkgdata_DATA = $(shell find core classes languages packages lua-libraries -type f -print)
 EXTRA_DIST = CHANGELOG.md README.md LICENSE spec tests examples documentation sile-dev-1.rockspec build-aux/git-version-gen .version fontconfig.conf
+EXTRA_DIST += $(extra_dist)
 
 SHELL = bash
 .ONESHELL:
 .SECONDEXPANSION:
 .DELETE_ON_ERROR:
 
 if !SYSTEM_LUAROCKS
-subdir_files += $(shell find lua_modules -type f -print)
-LUAROCKS := luarocks --tree lua_modules
-LUAROCKSARGS ?=
+nobase_nodist_pkgdata_DATA = $(shell find lua_modules -type f -print)
+extra_dist = $(shell find lua_modules_dist -type f -print)
+LUAROCKS := luarocks --tree lua_modules --lua-version $(LUA_VERSION)
 LUAMODLOCK := sile-dev-1.rockslock
 LUAMODSPEC := sile-dev-1.rockspec
-genrockslock := $(LUAROCKS) list --porcelain | awk '{print $$1 " " $$2}'
+genrockslock := $(LUAROCKS) $(LUAROCKSARGS) list --porcelain | awk '{print $$1 " " $$2}'
 rocksmatch := cmp -s $(LUAMODLOCK) <($(genrockslock))
 endif
 
@@ -36,7 +38,7 @@ BUILT_SOURCES = .version
 	cmp -s $@{,-prev} || autoreconf configure.ac --force -W none
 	sed -i -e '/rm -f/s/ core / /' configure aclocal.m4 ||:
 
-dist-hook:
+dist-hook: lua_modules_dist
 	echo $(VERSION) > $(distdir)/.tarball-version
 	sed -i -e '/rm -f/s/ core / /' configure aclocal.m4 ||:
 
@@ -83,14 +85,26 @@ if !SYSTEM_LUAROCKS
 installrocks: $(LUAMODLOCK) $(shell $(rocksmatch) || echo lua_modules)
 
 lua_modules: $(LUAMODSPEC) $(shell $(rocksmatch) || echo force)
-	$(LUAROCKS) $(LUAROCKSARGS) install --only-deps $<
+	if test -e .git; then
+		$(LUAROCKS) $(LUAROCKSARGS) install --only-deps $<
+	else
+		rm -rf lua_modules
+		cp -a lua_modules_dist lua_modules
+		$(foreach LUA,$(filter-out $(LUA_VERSION),$(SUPPORTED_LUAS)),
+		find lua_modules -maxdepth 3 -type d -name "*$(LUA)" -execdir rm -rf {} \;)
+	fi
 
 $(LUAMODLOCK): lua_modules $(LUAMODSPEC)
 	$(genrockslock) > $@
 
 sile: installrocks
 endif
 
+.PHONY: lua_modules_dist
+lua_modules_dist: $(LUAMODSPEC) force
+	$(foreach LUA,$(SUPPORTED_LUAS),
+	$(LUAROCKS) --tree lua_modules_dist --lua-version $(LUA) install --only-deps $<)
+
 DEPDIR := .deps
 REGRESSIONSCRIPT := ./tests/regressions.pl
 LOCALTESTFONTS := FONTCONFIG_FILE=$(PWD)/fontconfig.conf