Re: 6.1.3. Multiple binary packages question

2023-06-18 Thread Simon McVittie
On Sun, 18 Jun 2023 at 23:18:24 +, Holger Levsen wrote:
> On Sun, Jun 18, 2023 at 11:19:06PM +0200, Bill Allombert wrote:
> > The drawback of dh_install is that it requires more diskspace to build than
> > dh_movefiles but is less error prone.
> > So unless your package is very large, it is safer to use dh_install.
> 
> interesting, I've never heard of dh_movefiles before.

It's the tool that was used before dh_install existed. Its man page says:

Note: dh_install is a much better program, and you are recommended
to use it instead of dh_movefiles.

> what does "more diskspace" mean, however? kilobytes? terabytes? 100% of
> the diskspace used by the files installed? 200%?

The cost is 100% of the disk space used by the files being installed,
if your filesystem doesn't support reflinks; or 0% if it does.

dh_install does something similar to

cp --reflink=auto debian/tmp/usr/bin/foo debian/foo-bin/usr/bin/foo

whereas dh_movefiles is more like

mv debian/tmp/usr/bin/foo debian/foo-bin/usr/bin/foo

On btrfs and other reflink-capable filesystems, dh_install should be
basically zero-cost, as a result of --reflink=auto.

I'd personally only consider using dh_movefiles for the largest of "data"
packages. Things like openarena-data and nexuiz-data (hundreds of MiB)
are fine with dh_install, but 0ad-data (about 3 GiB) would maybe benefit?

(But if I maintained 0ad-data, I'd probably still use dh_install, and just
make sure that I built it on btrfs or another reflink-capable filesystem
if time and space were a concern.)

> "my" largest package was less than 100mb in size, which can be a bit annoying 
> for
> uploads, but for diskspace during build, several gigabytes (or more) are
> not uncommon, so I'm having a somewhat hard time imaginening that the
> above is a relavant argument in most situations.

If your package's total Installed-Size is 100M and we assume the compressed
size is (say) 60M, then I would expect the build to need:

quite a lot  ./configure && make
+ 100M   make install DESTDIR=debian/tmp
+ 100M   dh_install
+ 60Mdh_builddeb

At best, dh_movefiles saves you the second "+ 100M".

smcv



Re: 6.1.3. Multiple binary packages question

2023-06-18 Thread Holger Levsen
On Sun, Jun 18, 2023 at 11:19:06PM +0200, Bill Allombert wrote:
> On Sat, Jun 17, 2023 at 09:21:00PM +, Holger Levsen wrote:
> > On Mon, Apr 03, 2023 at 09:29:04AM -0600, Sam Hartman wrote:
> > > > "Kristian" == Kristian Penno  writes:
> > > Kristian> source package is referenced.  The lyx source package uses
> > > Kristian> some shell commands to move files around in the rules
> > > Kristian> file.  Is this preferred to using debhelper
> > > Kristian> .install files?
> > > No.
> > > If .install files work for you, that's better.
> The drawback of dh_install is that it requires more diskspace to build than
> dh_movefiles but is less error prone.
> So unless your package is very large, it is safer to use dh_install.

interesting, I've never heard of dh_movefiles before.

what does "more diskspace" mean, however? kilobytes? terabytes? 100% of
the diskspace used by the files installed? 200%?

"my" largest package was less than 100mb in size, which can be a bit annoying 
for
uploads, but for diskspace during build, several gigabytes (or more) are
not uncommon, so I'm having a somewhat hard time imaginening that the
above is a relavant argument in most situations.

But I might be wrong. :)


-- 
cheers,
Holger

 ⢀⣴⠾⠻⢶⣦⠀
 ⣾⠁⢠⠒⠀⣿⡁  holger@(debian|reproducible-builds|layer-acht).org
 ⢿⡄⠘⠷⠚⠋⠀  OpenPGP: B8BF54137B09D35CF026FE9D 091AB856069AAA1C
 ⠈⠳⣄

Homophobia is a sin against god.


signature.asc
Description: PGP signature


Re: 6.1.3. Multiple binary packages question

2023-06-18 Thread Bill Allombert
On Sat, Jun 17, 2023 at 09:21:00PM +, Holger Levsen wrote:
> On Mon, Apr 03, 2023 at 09:29:04AM -0600, Sam Hartman wrote:
> > > "Kristian" == Kristian Penno  writes:
> > Kristian> source package is referenced.  The lyx source package uses
> > Kristian> some shell commands to move files around in the rules
> > Kristian> file.  Is this preferred to using debhelper
> > Kristian> .install files?
> > No.
> > If .install files work for you, that's better.

The drawback of dh_install is that it requires more diskspace to build than
dh_movefiles but is less error prone.
So unless your package is very large, it is safer to use dh_install.

Cheers,
-- 
Bill. 

Imagine a large red swirl here. 



Re: 6.1.3. Multiple binary packages question

2023-06-17 Thread Holger Levsen
On Mon, Apr 03, 2023 at 09:29:04AM -0600, Sam Hartman wrote:
> > "Kristian" == Kristian Penno  writes:
> Kristian> source package is referenced.  The lyx source package uses
> Kristian> some shell commands to move files around in the rules
> Kristian> file.  Is this preferred to using debhelper
> Kristian> .install files?
> No.
> If .install files work for you, that's better.

thank you, Kristian and Sam, I've updated src:dev-ref in git
to refer to libxml2 instead of lyx.

https://salsa.debian.org/debian/developers-reference/-/commit/4bc621bb5fae5ed43a6873e8bbd26c397ab78b61


-- 
cheers,
Holger

 ⢀⣴⠾⠻⢶⣦⠀
 ⣾⠁⢠⠒⠀⣿⡁  holger@(debian|reproducible-builds|layer-acht).org
 ⢿⡄⠘⠷⠚⠋⠀  OpenPGP: B8BF54137B09D35CF026FE9D 091AB856069AAA1C
 ⠈⠳⣄

Everyone is entitled to their own opinion, but not their own facts.


signature.asc
Description: PGP signature


Re: 6.1.3. Multiple binary packages question

2023-04-03 Thread Sam Hartman
> "Kristian" == Kristian Penno  writes:

Kristian> source package is referenced.  The lyx source package uses
Kristian> some shell commands to move files around in the rules
Kristian> file.  Is this preferred to using debhelper
Kristian> .install files?

No.
If .install files work for you, that's better.