Package: debhelper
Version: 12.7.1
Severity: wishlist

I’ve recently gained a build reproducibility error in src:musescore where
cmake is used to first copy a few files around, generate some, and then
create a PKZIP archive from them using its built-in archiver. The files
in that archive were different in permissions.

I’ve tried setting the umask globally by doing this:

• add “SHELL:=$(abspath debian/rwrap)” to debian/rules
• create debian/rwrap (executable) with the following content:

        tglase@tglase:~/Projekte/musescore $ cat debian/rwrap 
        #!/bin/lksh
        # ${SHELL} wrapper to fix the umask
        
        umask 022
        eval "$2"

For some reason the desired effect is not observed, although
I had some debugging echos in debian/rwrap earlier whose output
was seen during a local build.

As there’s a general recommendation of using the dh wrapper
nowadays anyway, please (feature request, wishlist severity)
make it reset umask.

debian/rules has:

        %:
                dh $@ --buildsystem=cmake

I could probably change that to…

        %:
                umask 022 && exec dh $@ --buildsystem=cmake

… but everyone needs to do that then, and this is a good example
of harmonisation potential.

-- System Information:
Debian Release: bullseye/sid
  APT prefers buildd-unstable
  APT policy: (500, 'buildd-unstable'), (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 5.3.0-1-amd64 (SMP w/2 CPU cores)
Kernel taint flags: TAINT_CRAP
Locale: LANG=C, LC_CTYPE=C.UTF-8 (charmap=UTF-8), LANGUAGE=C (charmap=UTF-8)
Shell: /bin/sh linked to /bin/lksh
Init: sysvinit (via /sbin/init)

Versions of packages debhelper depends on:
ii  autotools-dev            20180224.1
ii  dh-autoreconf            19
ii  dh-strip-nondeterminism  1.6.2-1
ii  dpkg                     1.19.7
ii  dpkg-dev                 1.19.7
ii  dwz                      0.13-2
ii  file                     1:5.37-6
ii  libdebhelper-perl        12.7.1
ii  libdpkg-perl             1.19.7
ii  man-db                   2.9.0-1
ii  perl                     5.30.0-9
ii  po-debconf               1.0.21

debhelper recommends no packages.

Versions of packages debhelper suggests:
pn  dh-make  <none>

-- no debconf information

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