Bug#793499: debian-policy: The Installed-Size algorithm is out-of-date

Guillem Jover

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Jul 24, 2015, 12:10:03 PM7/24/15

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Package: debian-policy
Version: 3.9.7.0
Severity: wishlist

Hi!

As discussed in the debian-policy list, the Installed-Size algorithm
as implemented in dpkg-gencontrol changed due to #650077. So the
current wording is out-of-sync. Please see the thread starting at
<https://lists.debian.org/debian-policy/2011/11/msg00079.html>,
with the current implementation
<https://lists.debian.org/debian-policy/2015/01/msg00044.html>.

Thanks,
Guillem

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Guillem Jover

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Sep 12, 2023, 5:10:05 PM9/12/23

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Hi!

On Fri, 2015-07-24 at 18:04:41 +0200, Guillem Jover wrote:
> Package: debian-policy
> Version: 3.9.7.0
> Severity: wishlist

> As discussed in the debian-policy list, the Installed-Size algorithm
> as implemented in dpkg-gencontrol changed due to #650077. So the
> current wording is out-of-sync. Please see the thread starting at
> <https://lists.debian.org/debian-policy/2011/11/msg00079.html>,
> with the current implementation
> <https://lists.debian.org/debian-policy/2015/01/msg00044.html>.

How about the attached patch, based on the text in deb-substvars(5)?

Thanks,
Guillem

0001-Update-Installed-Size-algorithm-used-by-dpkg-since-1.patch

Russ Allbery

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Sep 12, 2023, 5:20:04 PM9/12/23

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Guillem Jover <gui...@debian.org> writes:

> How about the attached patch, based on the text in deb-substvars(5)?

This looks great, thank you. Seconded.

> From 024d94daeb0ab0e7c447868a1b8f9ff953850404 Mon Sep 17 00:00:00 2001
> From: Guillem Jover <gui...@debian.org>
> Date: Tue, 12 Sep 2023 22:47:27 +0200
> Subject: [PATCH] Update Installed-Size algorithm used by dpkg since 1.18.0

> The previous algorithm relied entirely on du(1) computing the used
> size, but depended on the filesystem in use on the build system.

> The new algorithm used by dpkg since 1.18.0 (implemented in
> commit 9ed7d4d47b73ffe67e1f7d31f899a1dfd43d490b), guarantees a
> constant and reproducible size regardless of the build system
> filesystem being used. Although it is still an approximation of
> the actual size that the package will use on the installed system.

> Closes: #793499
> ---
> policy/ch-controlfields.rst | 5 +++--
> 1 file changed, 3 insertions(+), 2 deletions(-)

> diff --git a/policy/ch-controlfields.rst b/policy/ch-controlfields.rst
> index 45776ea..2871658 100644
> --- a/policy/ch-controlfields.rst
> +++ b/policy/ch-controlfields.rst
> @@ -939,8 +939,9 @@ space required to install the named package. Actual installed size may
> vary based on block size, file system properties, or actions taken by
> package maintainer scripts.
>
> -The disk space is given as the integer value of the estimated installed
> -size in bytes, divided by 1024 and rounded up.
> +The disk space is given as the accumulated size of each regular file and
> +symlink rounded to 1 KiB used units, and a baseline of 1 KiB for any other
> +filesystem object type.
>
> .. _s-f-Files:

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Russ Allbery (r...@debian.org) <https://www.eyrie.org/~eagle/>