Re: texi2dvi changes

[Gavin Smith]

On Wed, Jun 21, 2017 at 08:28:12PM +0100, Gavin Smith wrote:
> On Fri, Sep 25, 2015 at 09:42:51AM +0100, Gavin Smith wrote:
> > Now only the files that are directly produced are compared, not the 
> > sorted index files.
> 
> This has the unfortunate effect that if the sorted index files are 
> missing but the unsorted index files aren't, then texi2dvi won't
> call texindex.  For example:
> 
> # this creates index files file.??
> $ pdfetex file.texi
> 
> # this sees that file.?? hasn't changed and doesn't create file.??s
> $ texi2pdf file.texi
> 
> This situation won't occur very often as usually people will always use
> texi2pdf or texi2dvi instead of pdfetex or etex, but it's confusing 
> enough when it happens that I think it is worth fixing. I'm looking at
> texi2dvi now to try to see how to fix this.

I've made it so that it requires files with the names of sorted index 
files to exist.  I've tested it with a few Texinfo files as well as a 
LaTeX input file that used bibtex (where .bbl and .blg files are 
required to exist).

Previously, texi2dvi dealt with sorted index files by always 
regenerating them, but this is a bit slower, especially with newer 
texindex implemented in awk.  It should not be necessary to regenerate 
them, anyway.