From: "Daniel Shahaf" <d.s@daniel.shahaf.name>
To: "Zach Riggle" <zachriggle@gmail.com>, "Zsh Users" <zsh-users@zsh.org>
Subject: Re: Globbing symlinks-to-${glob_qualifier}
Date: Wed, 18 Aug 2021 03:57:50 +0000 [thread overview]
Message-ID: <8e20a9ea-d705-4a1f-97ca-ff6b809f6a92@www.fastmail.com> (raw)
In-Reply-To: <CAMP9c5mm1XnECVcGriaL7v0z23MAUijGYM-nVuoqMCgS2s-Biw@mail.gmail.com>
Zach Riggle wrote on Wed, 18 Aug 2021 03:27 +00:00:
> UPDATE: Managed to figure it out on my own (see update at the end),
> but thought this was still worth posting in case the mail archives get
> indexed by Google.
+1
> My question is whether there's a way to combine the @ with any of the
> other glob qualifiers -- i.e. to glob for symlinks-to-directories or
> symlinks-to-executables.
That'll be «*(@-/)» and «*(@-*)» respectively. The «@» tests the directory entry
for being a symlink, then «-» flips to "testing the directory entry,
unless it's a symlink in which case test what it points to", and «/»
tests the symlink's target for being a directory.
Does not require extendedglob.
Under the hood, «-» simply flips between testing the results of lstat(2)
and stat(2).
> Many of the glob qualifiers are specific, simple, and well-documented
> -- *(*) for executables, *(/) for directories, *(.) for files, and
> *(@) for symlinks.
>
> I tried the obvious combinations, but these didn't work. Not surprising.
>
> $ ls -lad *(/) # Shows all directories
> $ ls -lad *(@/) # Error
> $ ls -lad *(/@) # Error
Not an error; just zero matches. That's not the same thing.
These particular commands will _always_ have zero matches, because no
directory entry can be both a symlink and a directory. (A dirent can be
a symlink _to_ a directory, but a symlink can't _itself_ be a directory.)
> Ultimately, I managed to sort it out and everything works how I want!
Thanks for sharing your steps! It's helpful for our next design discussions :)
Daniel
next prev parent reply other threads:[~2021-08-18 3:59 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-18 3:27 Zach Riggle
2021-08-18 3:57 ` Daniel Shahaf [this message]
2021-08-18 4:02 ` Bart Schaefer
2021-08-18 13:10 ` Zach Riggle
2021-08-18 15:24 ` Bart Schaefer
2021-08-18 16:48 ` Ray Andrews
2021-08-18 17:23 ` Bart Schaefer
2021-08-18 17:55 ` Ray Andrews
2021-08-18 22:28 ` Which options are really doing anything (Re: Globbing symlinks-to-${glob_qualifier}) Bart Schaefer
2021-08-18 23:27 ` Ray Andrews
2021-08-19 2:32 ` Globbing symlinks-to-${glob_qualifier} Zach Riggle
2021-08-19 4:38 ` Lawrence Velázquez
2021-08-19 13:23 ` Daniel Shahaf
2021-08-19 13:25 ` Daniel Shahaf
2021-08-19 14:38 ` Ray Andrews
2021-08-19 13:54 ` Daniel Shahaf
2021-08-19 4:40 ` Bart Schaefer
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=8e20a9ea-d705-4a1f-97ca-ff6b809f6a92@www.fastmail.com \
--to=d.s@daniel.shahaf.name \
--cc=zachriggle@gmail.com \
--cc=zsh-users@zsh.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this public inbox
https://git.vuxu.org/mirror/zsh/
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).