>> Does groff's -V option help? It shows the constructed pipeline.
>>
>> $ groff -V -Kcp1251 -t -Tutf8
>> preconv -ecp1251 | tbl | troff -Tutf8 | grotty
>> $ groff -V -s -Kcp1251 -t -Tutf8
>> preconv -ecp1251 | soelim | tbl | troff -Tutf8 | grotty
>>
>> The preconv has happened before soelim if -s is used whereas when
>> you run it manually, it's after.
>
> Thank you, Ralph. I forgot about the -V option. Now the question
> is whether this sequence is correct or should be changed so that
> soelim will be called before all other preprocessors. After all,
> soelim's very purpose is to preprocess included files...
This has been discussed a few months ago on the list, IIRC, and then I
stated that I no longer remembered why soelim comes after preconv.
Unfortunately, this comment is still true: I can't remember the
exact cause.
It's easy to change that behaviour, and you might experiment with the
patch below. I don't object if you want to apply it (together with
improved groff documentation and a proper ChangeLog entry :-).
$ groff -V -s -Kcp1251 -t -Tutf8
soelim | preconv -ecp1251 | tbl | troff -Tutf8 | grotty
Werner
======================================================================
--- groff.cpp.orig 2011-01-22 16:00:20.000000000 +0100
+++ groff.cpp 2012-12-06 14:00:58.000000000 +0100
@@ -53,9 +53,9 @@
// grap and chem must come before pic;
// tbl must come before eqn
-const int PRECONV_INDEX = 0;
-const int SOELIM_INDEX = PRECONV_INDEX + 1;
-const int REFER_INDEX = SOELIM_INDEX + 1;
+const int SOELIM_INDEX = 0;
+const int PRECONV_INDEX = SOELIM_INDEX + 1;
+const int REFER_INDEX = PRECONV_INDEX + 1;
const int GRAP_INDEX = REFER_INDEX + 1;
const int CHEM_INDEX = GRAP_INDEX + 1;
const int PIC_INDEX = CHEM_INDEX + 1;
