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From: Max Nikulin <manikulin@gmail.com>
To: Greg Minshall <minshall@umich.edu>, Org Mode <emacs-orgmode@gnu.org>
Subject: Re: tangle option to not write a file with same contents?
Date: Sat, 7 May 2022 15:05:14 +0700	[thread overview]
Message-ID: <12cd2bb0-584e-dcff-baca-1ed27d0281ff@gmail.com> (raw)
In-Reply-To: <583051.1635393898@apollo2.minshall.org>

A couple additional notes for the case that someone will find this 
thread in future.

On 28/10/2021 11:04, Greg Minshall wrote:
> i wonder if it would be reasonable to add an option such that, when
> tangling, `org-babel-tangle` would not write a file with the
> already-existing contents of the target file?
> this would be helpful, e.g., for those of us who use make(1)-based work
> flows.

It was not obvious for me earlier that it should be namely an *option*, 
not just change of behavior, since e.g. `org-babel-load-file' relies on 
timestamp comparison of the source .org file and the derived .el file. I 
am unsure concerning default value of such setting.

It was an issue with `org-file-newer-than-p' that reminded me about this 

P.S. Timestamp comparison is not always reliable to determine whether 
prerequisite has not been updated. Earlier python had timestamp of .py 
file saved in the header of compiled .pyc files, but at some moment they 
switched to hash.

PEP 552 – Deterministic pycs

  parent reply	other threads:[~2022-05-07  8:06 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-28  4:04 tangle option to not write a file with same contents? Greg Minshall
2021-10-29 16:21 ` Max Nikulin
2021-10-29 17:58   ` Greg Minshall
2021-10-30 15:13     ` Max Nikulin
2021-10-30 16:13       ` Greg Minshall
2022-05-07  8:05 ` Max Nikulin [this message]
2022-05-08  4:42   ` [PATCH] " Ihor Radchenko
2022-05-17 15:39     ` Max Nikulin
2022-05-30  3:14       ` Ihor Radchenko
2022-05-31 16:07         ` Max Nikulin
2022-06-03  7:04           ` Ihor Radchenko
2022-06-07  3:47             ` Tom Gillespie
2022-06-01 13:18     ` Greg Minshall
2022-09-12 17:36       ` Org version mismatch -- hooray! Greg Minshall

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