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* bug#48661: reproducibility: build date in modus-themes.info
@ 2021-05-25 21:50 Glenn Morris
  2021-05-26  9:15 ` Protesilaos Stavrou
  2021-05-26 10:22 ` Kévin Le Gouguec
  0 siblings, 2 replies; 4+ messages in thread
From: Glenn Morris @ 2021-05-25 21:50 UTC (permalink / raw)
  To: 48661; +Cc: info

Package: emacs
Version: 28.0.50
Severity: minor

doc/misc/modus-themes.org contains this:

   This manual was built on {{{export-date}}}.

This makes the generated info file non-reproducible (different every build).
Please consider removing this information.





^ permalink raw reply	[flat|nested] 4+ messages in thread

* bug#48661: reproducibility: build date in modus-themes.info
  2021-05-25 21:50 bug#48661: reproducibility: build date in modus-themes.info Glenn Morris
@ 2021-05-26  9:15 ` Protesilaos Stavrou
  2021-05-26 10:22 ` Kévin Le Gouguec
  1 sibling, 0 replies; 4+ messages in thread
From: Protesilaos Stavrou @ 2021-05-26  9:15 UTC (permalink / raw)
  To: Glenn Morris, 48661-done

On 2021-05-25, 17:50 -0400, Glenn Morris <rgm@gnu.org> wrote:

> Package: emacs
> Version: 28.0.50
> Severity: minor
>
> doc/misc/modus-themes.org contains this:
>
>    This manual was built on {{{export-date}}}.
>
> This makes the generated info file non-reproducible (different every build).
> Please consider removing this information.

Thank you!  I just installed the changes as commit 5a762c946e.


-- 
Protesilaos Stavrou
https://protesilaos.com





^ permalink raw reply	[flat|nested] 4+ messages in thread

* bug#48661: reproducibility: build date in modus-themes.info
  2021-05-25 21:50 bug#48661: reproducibility: build date in modus-themes.info Glenn Morris
  2021-05-26  9:15 ` Protesilaos Stavrou
@ 2021-05-26 10:22 ` Kévin Le Gouguec
  2021-05-26 10:40   ` Andreas Schwab
  1 sibling, 1 reply; 4+ messages in thread
From: Kévin Le Gouguec @ 2021-05-26 10:22 UTC (permalink / raw)
  To: Glenn Morris; +Cc: info, 48661

Glenn Morris <rgm@gnu.org> writes:

>    This manual was built on {{{export-date}}}.
>
> This makes the generated info file non-reproducible (different every build).
> Please consider removing this information.

Question from the peanut gallery: are timestamp information really
verboten in reproducible builds?  I was led to believe that the
SOURCE_DATE_EPOCH mechanism was introduced to allow programs to keep
embedding this information, while giving packagers the means to assert
reproducibility.

https://reproducible-builds.org/docs/source-date-epoch/

I am not well-versed on the subject of reproducible builds, so I
apologize if I am misunderstanding the state of things; also, since I
don't think the Emacs build system uses the SOURCE_DATE_EPOCH mechanism,
I realize that this idea might be out of scope for this bug report…





^ permalink raw reply	[flat|nested] 4+ messages in thread

* bug#48661: reproducibility: build date in modus-themes.info
  2021-05-26 10:22 ` Kévin Le Gouguec
@ 2021-05-26 10:40   ` Andreas Schwab
  0 siblings, 0 replies; 4+ messages in thread
From: Andreas Schwab @ 2021-05-26 10:40 UTC (permalink / raw)
  To: Kévin Le Gouguec; +Cc: Glenn Morris, info, 48661

On Mai 26 2021, Kévin Le Gouguec wrote:

> Question from the peanut gallery: are timestamp information really
> verboten in reproducible builds?  I was led to believe that the
> SOURCE_DATE_EPOCH mechanism was introduced to allow programs to keep
> embedding this information, while giving packagers the means to assert
> reproducibility.

That requires support for SOURCE_DATE_EPOCH in each place a timestamp is
generated.  For example, gcc does that for __DATE__ and __TIME__.  If
org wants to keep the timestamp it should add support for
SOURCE_DATE_EPOCH.

Andreas.

-- 
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510  2552 DF73 E780 A9DA AEC1
"And now for something completely different."





^ permalink raw reply	[flat|nested] 4+ messages in thread

end of thread, other threads:[~2021-05-26 10:40 UTC | newest]

Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2021-05-25 21:50 bug#48661: reproducibility: build date in modus-themes.info Glenn Morris
2021-05-26  9:15 ` Protesilaos Stavrou
2021-05-26 10:22 ` Kévin Le Gouguec
2021-05-26 10:40   ` Andreas Schwab

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