Re: Extracting cross-version-upgrade knowledge from buildfarm client

On 2023-01-15 Su 11:01, Tom Lane wrote:
> Another thing I was just thinking about was not bothering to run
> "diff" if the fixed dump strings are equal in-memory. You could
> take that even further and not write out the fixed files at all,
> but that seems like a bad idea for debuggability of the adjustment
> subroutines. However, I don't see why we need to write an
> empty diff file, nor parse it.

Yeah, that makes sense.

> One other question before I continue --- do the adjustment
> subroutines need to worry about Windows newlines in the strings?
> It's not clear to me whether Perl will automatically make "\n"
> in a pattern match "\r\n", or whether it's not a problem because
> something upstream will have stripped \r's.
>
>

I don't think we need to worry about them, but I will have a closer
look. Those replacement lines are very difficult to read. I think use of
extended regexes and some multi-part replacements would help. I'll have
a go at that tomorrow.

cheers

andrew

--
Andrew Dunstan
EDB: https://www.enterprisedb.com