From: Jean-Christophe Helary <jean.christophe.helary@traduction-libre.org>
To: help-gnu-emacs@gnu.org
Subject: safe way to add contents to a file ?
Date: Wed, 18 Dec 2019 09:03:52 +0900 [thread overview]
Message-ID: <0FE61EAF-672C-4348-8107-F4C3D176FCF4@traduction-libre.org> (raw)
I'm struggling with what is the ideal "elispy" way of adding contents to a file at a given position.
What I want it:
- create some content
- put that content at a specific location in a file saved on disk
(current use case: add an xml block to an RSS file)
I thought write-region would do the trick but there are 2 issues with it
1) if APPEND is a number, that's the position from which my contents will *overwrite* the rest of the file (I want to *insert* my contents)
2) there are weird things like the whole code where I call this function is actually copied to the target file buffer and I have no idea how to prevent that.
So, I thought of something a bit convoluted:
use a temporary buffer
insert the contents of the file there
find the point where I want to insert my contents
find the end of the file
copy that region to a different buffer
write my contents from the point I specified above
append the copied region to that
write all that to the original file
But I thought, it's not like such things don't happen all the time in emacs, so there must be a better workflow.
But the reference is incredibly cryptic regarding that and the Intro does not address any file i/o at all...
Jean-Christophe Helary
-----------------------------------------------
http://mac4translators.blogspot.com @brandelune
next reply other threads:[~2019-12-18 0:03 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-18 0:03 Jean-Christophe Helary [this message]
2019-12-18 0:36 ` safe way to add contents to a file ? Óscar Fuentes
2019-12-18 3:20 ` Jean-Christophe Helary
2019-12-20 13:50 ` Jean-Christophe Helary
2019-12-20 16:00 ` Stefan Monnier
2019-12-22 3:14 ` Jean-Christophe Helary
2019-12-22 4:42 ` Jean-Christophe Helary
2019-12-22 14:37 ` Óscar Fuentes
2019-12-22 22:18 ` Jean-Christophe Helary
2019-12-23 0:08 ` Óscar Fuentes
2019-12-22 18:23 ` Stefan Monnier
2019-12-18 3:59 ` Stefan Monnier
2019-12-18 9:41 ` Jean-Christophe Helary
2019-12-18 13:10 ` Óscar Fuentes
2019-12-18 22:33 ` Jean-Christophe Helary
2019-12-18 14:10 ` Stefan Monnier
2019-12-18 22:25 ` Jean-Christophe Helary
2019-12-18 22:27 ` Jean-Christophe Helary
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