regex

DaveH

What dialect of regex does TVH speak? I did a quick search but haven't found any docs.

I tried "New:.*(?!WWE)" without the double quotes, but it just deletes it. "New:" by itself works. "New:.*" works so it seems it doesn't like (?!WWE) so is there any way to achieve that? (a negative search)

davep

The contents of https://github.com/tvheadend/tvheadend/tree/master/data/conf/epggrab/eit/scrape should provide the answer.

DaveH

Thanks Dave. So it appears it depends on the particular regex engine in use and it says: "If either the PCRE or the PCRE2 library are found during configuration, that library can be used for regular expression matching."

Now I have both libpcre1 and libpcre2, so when does this configuration take place? When TVH is compiled, built, installed or run? I suspect compilation, because the UK readme says: "TvHeadend is often compiled with the PCRE regular expression library". In which case I can blame my distro for not compiling it with one of the extended libraries, but I'd like to be sure of my facts.

Jim Hague

The regex engine is determined at compile time as part of the compile configuration process.

DaveH

Thanks, Jim.