sclu1034 / lgi-async-extra Goto Github PK

This will require adding the relevant functions to GLib first:

g_file_make_symbolic_link_async
g_file_make_symbolic_link_finish
g_file_make_hard_link_async
g_file_make_hard_link_finish

The synchronous g_file_make_symbolic_link already exists, but GLib does not yet support creating hard links at all.

The Lua wrapper should be rather straight forward. The signature should be

-- @async
-- @tparam string target The target to point the link to.
-- @tparam[opt=true] boolean symbolic If `true`, create a symbolic link.
-- @treturn[opt] GLib.Error
function File:link(target, symbolic, cb)
end

Gio's stream operations to read arbitrary binary content return GBytes, which are immutable. To be able to read an entire stream, a GByteArray or similar mutable storage would be needed.
However, g_byte_array_append is not available via introspection (likely because the lower-level GArray operations aren't available either), making it impossible to push multiple GBytes into a single array.
LGI does have a rudimentary byte array available as require("bytes"), but this one doesn't allow efficient modification either. __newindex is implemented, but setting individual indices for buffer sizes of 4096 bytes would be rather inefficient.

Work on implementing a wrapper for GByteArray was started in https://github.com/sclu1034/lgi-async-extra/tree/feature/bytearray, but this would require linking against LGI and figuring out its inner workings.

It would be much better if LGI's bytes module was improved or GLib's arrays somehow became introspectable.