feat(build): Add rockspec and build tooling for rusile module

Makefile.am

@@ -73,7 +73,7 @@ endif !EMBEDDED_RESOURCES
 dist_doc_DATA = README.md CHANGELOG.md
 dist_pdf_DATA = $(_MANUAL)
 dist_license_DATA = LICENSE.md
-EXTRA_DIST = spec tests documentation sile-dev-1.rockspec fontconfig.conf
+EXTRA_DIST = spec tests documentation sile-dev-1.rockspec rusile-dev-1.rockspec fontconfig.conf
 EXTRA_DIST += build-aux/action-updater.js build-aux/cargo-updater.js build-aux/config.ld build-aux/decore-automake.sh build-aux/git-version-gen
 EXTRA_DIST += Dockerfile build-aux/docker-bootstrap.sh build-aux/docker-fontconfig.conf hooks/build
 EXTRA_DIST += build-aux/xml-entities-to-lua.xsl

configure.ac

@@ -300,6 +300,7 @@ AC_CONFIG_FILES([build-aux/transpile-tex-hyphen-patterns.lua], [chmod +x build-a
 AC_CONFIG_FILES([Makefile justenough/Makefile sile-lua.1 core/features.lua core/pathsetup.lua core/version.lua])
 AC_CONFIG_FILES([sile-lua:sile.in], [chmod +x sile-lua])
 AC_CONFIG_FILES([tests/regressions.pl], [chmod +x tests/regressions.pl])
+AC_CONFIG_FILES([rusile-dev-1.rockspec:rusile.rockspec.in])
 AC_CONFIG_FILES([sile-dev-1.rockspec:sile.rockspec.in])
 AC_CONFIG_FILES([src/sile-entry.sh], [chmod +x src/sile-entry.sh])
 

rusile.rockspec.in

@@ -0,0 +1,32 @@
+-- @ROCKSPECWARNING@
+rockspec_format = "3.0"
+package = "ru@PACKAGE_NAME@"
+version = "dev-@ROCKREV@"
+
+source = {
+   url = "git+https://github.com/sile-typesetter/sile.git",
+   branch = "master",
+}
+
+description = {
+   summary = "Lua bridge to Rust components of SILE",
+   detailed = [[The Rusty bits of SILE made available to Lua]],
+   license = "MIT",
+   homepage = "https://github.com/sile-typesetter/sile",
+   issues_url = "https://github.com/sile-typesetter/sile/issues",
+   maintainer = "Caleb Maclennan <caleb@alerque.com>",
+   labels = { "typesetting" },
+}
+
+dependencies = {
+   "lua >= 5.1",
+   "luarocks-build-rust-mlua >= 0.2.3-1",
+}
+
+build = {
+   type = "rust-mlua",
+   modules = {
+      "ru@PACKAGE_NAME@",
+   },
+}
+