10:47: 
 nanonanonano. 
 From: smcv@debian.org 
  
 On Mon, 03 Nov 2025 at 13:39:42 +1100, Stuart Prescott wrote: 
 >build-rdeps is needed here but of course that will include alternative 
 >build-deps (but only the first alternative is used on the sid 
 >buildds), and it might also include packages that b-d on imagemagick 
 >because of the Provides of graphicsmagick-imagemagick-compat. 
 > 
 >How many explicitly b-d on graphicsmagick-imagemagick-compat vs how 
 >many are there via the Provides I don't know. That's all stuff to do 
  
 You can get an idea of this by running the same commands that the 
 archive team would use to remove binary packages, in "dry-run" mode, 
 against the DD-accessible mirror of their database that is available on 
 coccia.debian.org: 
  
 ----8<---- 
 smcv@coccia ~ % dak rm -R -n -b graphicsmagick-imagemagick-compat 
 graphicsmagick-libmagick-dev-compat 
 Will remove the following packages from unstable: 
  
 graphicsmagick-imagemagick-compat | 1.4+really1.3.45+hg17696-1 | all 
 graphicsmagick-libmagick-dev-compat | 1.4+really1.3.45+hg17696-1 | all 
  
 Maintainer: Laszlo Boszormenyi (GCS)  
  
 ------------------- Reason ------------------- 
  
 ---------------------------------------------- 
  
 Checking reverse dependencies... 
 # Broken Build-Depends: 
 budgie-backgrounds: graphicsmagick-imagemagick-compat 
 isospec: graphicsmagick-imagemagick-compat 
 massxpert: graphicsmagick-imagemagick-compat 
 octave-queueing: graphicsmagick-imagemagick-compat 
 ponyprog: graphicsmagick-imagemagick-compat 
 sdcc: graphicsmagick-imagemagick-compat 
  
 Dependency problem found. 
 ----8<---- 
  
 This suggests that at least those 6 source packages are going to need 
 fixing. 
  
 Unfortunately `dak rm` doesn't seem to take into account 
 Build-Depends-Arch or Build-Depends-Indep, if that's significant here 
 (#1118954). 
  
 I also tried this, producing a slightly longer list of source packages: 
  
 $ grep-dctrl -FBuild-Depends-Indep,Build-Depends-Arch,Build-Depends - 
 sPackage -e '(^|,) *graphicsmagick-(imagemagick|libmagick-dev)-compat' 
 /var/lib/apt/lists/*{sid,unstable,experimental}_*_source_Sources 
 Package: budgie-backgrounds 
 Package: isospec 
 Package: massxpert 
 Package: octave-queueing 
 Package: ponyprog 
 Package: postgis 
 Package: pyx3 
 Package: sdcc 
 Package: zipios++ 
  
 which should find only the Build-Depends{,-Arch,-Indep} on these 
 packages that either have no alternative, or are the first one in an 
 alternatives group and therefore would be used on the sid buildds. (Note 
 that the experimental buildds do not have this restriction, and will 
 sometimes - not necessarily deterministically! - use a non-preferred 
 alternative.) 
  
 This list is similar to the one Santiago found by literally doing the 
 rebuilds and seeing what happened, but not identical: he also had a2ps, 
 latex-mk and moviepy (I think the reason these are not on my list is 
 that he fixed them in unstable already) but for whatever reason not 
 massxpert. 
  
 Other lists of (this time binary) packages that could be relevant for 
 this transition: 
  
 $ grep-dctrl -FDepends,Recommends,Pre-Depends -sPackage -e '(^|,) 
 *graphicsmagick-(imagemagick|libmagick-dev)-compat' 
 /var/lib/apt/lists/*{sid,unstable,experimental}_*_Packages|sort -u 
 Package: recoverjpeg 
  
 $ grep-dctrl -FDepends,Recommends,Pre-Depends -sPackage -e 'graphicsmagick- 
 (imagemagick|libmagick-dev)-compat' /var/lib/apt/lists/*{sid,unstable, 
 experimental}_*_Packages|sort -u 
 Package: auto-multiple-choice-common 
 Package: epix 
 Package: flydraw 
 Package: jhead 
 Package: latex2rtf 
 Package: megapixels 
 Package: recoverjpeg 
 Package: wesnoth-1.18-tools 
 Package: wims 
  
      smcv 
  
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