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Re: How to pass something on to xargs rm?
From: |
ng0 |
Subject: |
Re: How to pass something on to xargs rm? |
Date: |
Tue, 27 Dec 2016 12:42:13 +0000 |
John Darrington <address@hidden> writes:
> On Tue, Dec 27, 2016 at 11:33:21AM +0000, ng0 wrote:
> Hi,
>
> I have some scripts and small applications I'm slowly moving over
> to guile.
> One of them features this[0] line at the end which passes results on
> to xargs rm. I picked a start with just (system*) everything I
> had before to learn about the behavior and outcome, and improve
> from this point.
> I know that "|" will not work, so what else could possibly work
> (for starters, in the long run I'll generalize and extend what I
> currently have) to execute this command which deletes every file
> listed in the previous search?
>
> [0]: notmuch search --output=files tag:deleted | xargs -L 1 rm
>
>
> I think you want something like: .... | xargs -I {} rm {}
>
>
> J'
I think I was a bit too verbose with my question. I meant to say:
the part behind the "|", which originates from a 1:1 conversion of
the bash based part, is ignored for obvious reasons. But what
would be a quick way (until I've learned enough on this topic
myself) to perform the deletion?
I know that the original, "notmuch search --output=files
tag:deleted | xargs -L 1 rm" works in the bash script, but for
the .scm script, everything above (fetching mail, tagging mail)
works and this part is ignored:
(system* "notmuch" "search" "--output=files" "tag:deleted" "|" "xargs" "-L" "1"
"rm")
To give you an idea, this is (part of) the mailget.scm:
address@hidden ~$ cat mailget
#!/home/ng0/.guix-profile/bin/guile \
-s
!#
(let* ((home (getenv "HOME"))
;;(tor-on (system* "." "torsocks" "on"))
;;(tor-off (system* "." "torsocks" "off"))
(nm-new (system* "notmuch" "new")))
(chdir (string-append home "/.getmail"))
;; tor-on
;;# find . -name '*.rc' | xargs -n1 -i basename {} .rc | xargs -P 2 -n1 -i
getmail -r {}.rc
;; FIXME: *.rc not found here:
;; (system* "parallel" "getmail" "-q" "-r" "{}" ":::" "*.rc")
(system* "getmail" "-r" "getmailrc_grrlz_2.rc")
(system* "getmail" "-r" "getmailrc_runbox.rc")
;;tor-off
nm-new
(system* "notmuch" "tag" "-inbox" "+sometag" "--" "some subject")
…
;; Of course I don't have literally somesubject sometag, I
just will not expose what I tag and sort.
…
(system* "notmuch" "search" "--output=files" "tag:deleted" "|" "xargs" "-L"
"1" "rm")
(display "done")
(newline))
If there is no obvious, quick solution based on what I currently
do, I will gladly accept any small pointers to subjects I could
read into and solve it later in a better version. I consider the
current script just a small hack.
One solution I can imagine is that I write some functions which
will allow me to save the output of such a search into a list I
can work with and execute the physical deletion on each element.
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♥Ⓐ ng0
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