1 files changed, 50 insertions, 0 deletions
diff --git a/source/luametatex/source/luaoptional/lmtoptional.c b/source/luametatex/source/luaoptional/lmtoptional.c
new file mode 100644
index 000000000..0cfbd166c
--- /dev/null
+++ b/source/luametatex/source/luaoptional/lmtoptional.c
@@ -0,0 +1,50 @@
+/*
+    See license.txt in the root of this project.
+*/
+
+# include "luametatex.h"
+# include "lmtoptional.h"
+
+/*tex
+
+    We don't want the binary top explode and have depdencies that will kill this project in the
+    end. So, we provide optionals: these are loaded lazy and libraries need to be present in
+    the tree. They are unofficial and not supported in the sense that ConTeXt doesn't depend on
+    them.
+
+    The socket library is a candidate for ending up here too, as are the optional rest modules
+    lzo and lz4.
+
+*/
+
+int luaopen_optional(lua_State *L) {
+    /*tex We always have an |optional| root table. */
+    lmt_library_initialize(L);
+    luaopen_library(L);
+    luaopen_foreign(L); /* maybe in main */
+    /*tex These are kind of standard. */
+    luaopen_sqlite(L);
+    luaopen_mysql(L);
+    luaopen_postgress(L);
+    luaopen_curl(L);
+    luaopen_ghostscript(L);
+    luaopen_graphicsmagick(L);
+    luaopen_imagemagick(L);
+    luaopen_zint(L);
+    /*tex These are fun. */
+    luaopen_mujs(L);
+    /*tex These might be handy. */
+    luaopen_lzo(L);
+    luaopen_lz4(L);
+    luaopen_zstd(L);
+    luaopen_lzma(L);
+    /*tex These are extras. */
+# ifdef LMT_KPSE_TOO
+    luaopen_kpse(L);
+# endif
+# ifdef LMT_HB_TOO
+    luaopen_hb(L);
+# endif
+    /*tex Done. */
+    return 0;
+}