Lua equivalent to %{echo:...} and similar

[voxik]

Currently the way to get some information from Lua macro is quite clumsy. One needs to do something like:

%define foo() %{lua:
  rpm.expand("%{echo: some output}")
}

Would it be possible to make it easier, e.g. something like this would be more convenient:

%define foo() %{lua:
  rpm.echo("some output")
}

Or maybe just:

%define foo() %{lua:
  echo("some output")
}

[mlschroe]

You can already do:

macros.echo({"hello world"})

[voxik]

Oh. Interesting, the for the tip 👍 Nevertheless, I was not able to figure that out myself, therefore it would deserve to be documented if that is the right approach.

[voxik]

TBH figuring out rpm.expand("%{echo: some output}") is also not that straight forward. I was able to find such example at least.

[pmatilai]

Accessing rpm macros through the macros table is documented in https://rpm-software-management.github.io/rpm/manual/lua.html

[voxik]

Yes, I don't argue with that (and I was aware about that). But output from Lua to terminal is useful and would IMHO deserve some separate note.