texindex ¶In Texinfo version 6, released in 2015, the texindex program
was completely reimplemented. The principal functional difference is
that index entries beginning with a left brace or right brace
(‘{’ resp. ‘}’) can work properly. For example, these
simple index entries are processed correctly, including the “index
initial” shown in the index:
@cindex @{
@cindex @}
...
@printindex cp
Although not a matter of functionality, readers may be interested to
know that the new texindex is a literate program
(https://en.wikipedia.org/wiki/Literate_programming) using
Texinfo for documentation and (portable) awk for code. A
single source file, texindex/ti.twjr in this case, produces the
runnable program, a printable document, and an online document.
The system is called TexiWeb Jr. and was created by Arnold
Robbins, who also wrote the new texindex. Not
coincidentally, he is also the long-time maintainer of gawk
(GNU Awk, see The GNU Awk User’s Guide). The file
texindex/Makefile.am shows example usage of the system.