* are Perl regexps well-known enough for command-line use?
@ 2020-12-14 20:39 Eric Wong
2020-12-15 14:21 ` Konstantin Ryabitsev
0 siblings, 1 reply; 3+ messages in thread
From: Eric Wong @ 2020-12-14 20:39 UTC (permalink / raw)
To: meta
I've been thinking a bit about UI/UX for local command-line
tooling, and one thing I've been pondering is exposing Perl5
regexps as a mechanism for filtering
mailboxes/newsgroups/URLs/pathnames, etc...
It ties the UI to Perl5, though PCRE can get pretty close...
NNTP has it's own "wildmat" format in RFC 3977 which we support
(though maybe not 100% completely :x). It's pretty close to
Bourne shell globbing, I think.
Perl's built-in and stdlib glob operators only work on FS paths,
and (as usual) I'm trying to avoid dependencies or Inline::C for
ease-of-installation and disk/bandwidth considerations.
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: are Perl regexps well-known enough for command-line use?
2020-12-14 20:39 are Perl regexps well-known enough for command-line use? Eric Wong
@ 2020-12-15 14:21 ` Konstantin Ryabitsev
2020-12-15 20:17 ` Eric Wong
0 siblings, 1 reply; 3+ messages in thread
From: Konstantin Ryabitsev @ 2020-12-15 14:21 UTC (permalink / raw)
To: Eric Wong; +Cc: meta
On Mon, Dec 14, 2020 at 08:39:38PM +0000, Eric Wong wrote:
> I've been thinking a bit about UI/UX for local command-line
> tooling, and one thing I've been pondering is exposing Perl5
> regexps as a mechanism for filtering
> mailboxes/newsgroups/URLs/pathnames, etc...
I think it's best to stick to the same regexp flavour as used by git for
things like "git log -S", since people most likely to use this
functionality are the same people likely to use git.
I believe it's POSIX, not PCRE -- but I don't know how reasonable it is
to support POSIX regexps in Perl.
-K
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: are Perl regexps well-known enough for command-line use?
2020-12-15 14:21 ` Konstantin Ryabitsev
@ 2020-12-15 20:17 ` Eric Wong
0 siblings, 0 replies; 3+ messages in thread
From: Eric Wong @ 2020-12-15 20:17 UTC (permalink / raw)
To: meta
Konstantin Ryabitsev <konstantin@linuxfoundation.org> wrote:
> On Mon, Dec 14, 2020 at 08:39:38PM +0000, Eric Wong wrote:
> > I've been thinking a bit about UI/UX for local command-line
> > tooling, and one thing I've been pondering is exposing Perl5
> > regexps as a mechanism for filtering
> > mailboxes/newsgroups/URLs/pathnames, etc...
>
> I think it's best to stick to the same regexp flavour as used by git for
> things like "git log -S", since people most likely to use this
> functionality are the same people likely to use git.
That's my first choice, too
> I believe it's POSIX, not PCRE -- but I don't know how reasonable it is
> to support POSIX regexps in Perl.
There's an re engine for POSIX regexps on CPAN, but it's not in
any distros. A strong dependency on Inline::C would make it
harder to install.
All the stuff that's in Xapian can be filtered using the normal
search terms and wildcard support in native Xapian; which can
includes all of what's in the proposed ls-* commands.
I think that leaves pathnames and URLs (IMAP/NNTP)
for --exclude=PATH/FOLDERS and --include...
globs with '?' and '*' support is sufficient, there, I hope.
No need to introduce users to IMAP vs NNTP wildcard differences.
^ permalink raw reply [flat|nested] 3+ messages in thread
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2020-12-14 20:39 are Perl regexps well-known enough for command-line use? Eric Wong
2020-12-15 14:21 ` Konstantin Ryabitsev
2020-12-15 20:17 ` Eric Wong
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