Thorsten Leemhuis <linux@xxxxxxxxxxxxx> wrote: > Just to be sure I'll do what you expect to be done: I assume you want to see > it changed like this? > > - perl -pi -e 's|^Message-Id:\s*<?([^>]+)>?$|Link: https://lore.kernel.org/r/$1|g;' "$1" > + perl -pi -e 's|^Message-I[dD]:\s*<?([^>]+)>?$|Link: https://lore.kernel.org/r/$1|g;' "$1" > > Or are there even more variants of Message-ID out there known that > need to be taken into account? The entire match should be case-insensitive[1], so I'd add `i' at the end: perl -pi -e 's|^Message-ID:\s*<?([^>]+)>?$|Link: https://lore.kernel.org/r/$1|gi;' "$1" Fwiw, every mail and HTTP/1.x header parser I've looked at works case-insensitively. Also, I'm not sure if `g' is needed, actually... [1] https://datatracker.ietf.org/doc/html/rfc822#section-3.4.7
