On Wed, Jan 17, 2024 at 10:01:52PM +0100, Helmut Grohne wrote:
> What do you think? Yes, this adds quite some complexity to both
> packages, but now I don't see any opportunities for file loss anymore
> even when upgrading the packages with dpkg. Bonus, what formerly was
> Conflicts has now become Breaks making it easier for apt to find a
> solution.

Chris Hofstaedler found an inconsistency in the remove-after annotations
where I mixed trixie and forky in bad ways. Attaching an updated patch,
thanks.

Helmut
diff --minimal -Nru cryptsetup-2.6.1/debian/changelog 
cryptsetup-2.6.1/debian/changelog
--- cryptsetup-2.6.1/debian/changelog   2023-12-05 17:48:58.000000000 +0100
+++ cryptsetup-2.6.1/debian/changelog   2024-01-05 18:56:40.000000000 +0100
@@ -1,3 +1,10 @@
+cryptsetup (2:2.6.1-6.1) UNRELEASED; urgency=medium
+
+  * Non-maintainer upload.
+  * DEP17: Move fles to /usr. (Closes: #-1)
+
+ -- Helmut Grohne <hel...@subdivi.de>  Fri, 05 Jan 2024 18:56:40 +0100
+
 cryptsetup (2:2.6.1-6) unstable; urgency=medium
 
   [ Kevin Locke ]
diff --minimal -Nru cryptsetup-2.6.1/debian/control 
cryptsetup-2.6.1/debian/control
--- cryptsetup-2.6.1/debian/control     2023-12-05 17:48:58.000000000 +0100
+++ cryptsetup-2.6.1/debian/control     2024-01-05 18:56:40.000000000 +0100
@@ -43,6 +43,7 @@
          dmsetup,
          ${misc:Depends},
          ${shlibs:Depends}
+Breaks: cryptsetup-nuke-password (<< 4+nmu2~)
 Suggests: cryptsetup-initramfs, dosfstools, keyutils, liblocale-gettext-perl
 Description: disk encryption support - startup scripts
  Cryptsetup provides an interface for configuring encryption on block
diff --minimal -Nru cryptsetup-2.6.1/debian/cryptsetup-bin.install 
cryptsetup-2.6.1/debian/cryptsetup-bin.install
--- cryptsetup-2.6.1/debian/cryptsetup-bin.install      2023-12-05 
17:48:58.000000000 +0100
+++ cryptsetup-2.6.1/debian/cryptsetup-bin.install      2024-01-05 
18:56:40.000000000 +0100
@@ -1,5 +1,5 @@
-sbin/cryptsetup
-sbin/integritysetup
-sbin/veritysetup
+usr/sbin/cryptsetup
+usr/sbin/integritysetup
+usr/sbin/veritysetup
 usr/lib/tmpfiles.d/cryptsetup.conf
 usr/share/locale/*/*/*
diff --minimal -Nru cryptsetup-2.6.1/debian/cryptsetup-ssh.install 
cryptsetup-2.6.1/debian/cryptsetup-ssh.install
--- cryptsetup-2.6.1/debian/cryptsetup-ssh.install      2023-12-05 
17:48:58.000000000 +0100
+++ cryptsetup-2.6.1/debian/cryptsetup-ssh.install      2024-01-05 
18:56:40.000000000 +0100
@@ -1,2 +1,2 @@
-lib/${DEB_HOST_MULTIARCH}/cryptsetup/libcryptsetup-token-ssh.so
-sbin/cryptsetup-ssh
+usr/lib/${DEB_HOST_MULTIARCH}/cryptsetup/libcryptsetup-token-ssh.so
+usr/sbin/cryptsetup-ssh
diff --minimal -Nru cryptsetup-2.6.1/debian/cryptsetup-suspend.install 
cryptsetup-2.6.1/debian/cryptsetup-suspend.install
--- cryptsetup-2.6.1/debian/cryptsetup-suspend.install  2023-12-05 
17:48:58.000000000 +0100
+++ cryptsetup-2.6.1/debian/cryptsetup-suspend.install  2024-01-05 
18:56:40.000000000 +0100
@@ -1,5 +1,5 @@
-debian/scripts/suspend/cryptsetup-suspend /lib/cryptsetup/scripts/suspend/
-debian/scripts/suspend/cryptsetup-suspend-wrapper 
/lib/cryptsetup/scripts/suspend/
-debian/scripts/suspend/cryptsetup-suspend.shutdown 
/lib/systemd/system-shutdown/
+debian/scripts/suspend/cryptsetup-suspend /usr/lib/cryptsetup/scripts/suspend/
+debian/scripts/suspend/cryptsetup-suspend-wrapper 
/usr/lib/cryptsetup/scripts/suspend/
+debian/scripts/suspend/cryptsetup-suspend.shutdown 
/usr/lib/systemd/system-shutdown/
 debian/scripts/suspend/suspend.conf /etc/cryptsetup/
-debian/scripts/suspend/systemd/cryptsetup-suspend.conf 
/lib/systemd/system/systemd-suspend.service.d/
+debian/scripts/suspend/systemd/cryptsetup-suspend.conf 
/usr/lib/systemd/system/systemd-suspend.service.d/
diff --minimal -Nru cryptsetup-2.6.1/debian/cryptsetup-udeb.install 
cryptsetup-2.6.1/debian/cryptsetup-udeb.install
--- cryptsetup-2.6.1/debian/cryptsetup-udeb.install     2023-12-05 
17:48:58.000000000 +0100
+++ cryptsetup-2.6.1/debian/cryptsetup-udeb.install     2024-01-05 
18:56:40.000000000 +0100
@@ -1,7 +1,7 @@
-debian/askpass              /lib/cryptsetup/
-debian/checks/*             /lib/cryptsetup/checks/
-debian/cryptdisks-functions /lib/cryptsetup/
-debian/functions            /lib/cryptsetup/
-debian/scripts/decrypt_*    /lib/cryptsetup/scripts/
-debian/scripts/passdev      /lib/cryptsetup/scripts/
-sbin/cryptsetup
+debian/askpass              /usr/lib/cryptsetup/
+debian/checks/*             /usr/lib/cryptsetup/checks/
+debian/cryptdisks-functions /usr/lib/cryptsetup/
+debian/functions            /usr/lib/cryptsetup/
+debian/scripts/decrypt_*    /usr/lib/cryptsetup/scripts/
+debian/scripts/passdev      /usr/lib/cryptsetup/scripts/
+usr/sbin/cryptsetup
diff --minimal -Nru cryptsetup-2.6.1/debian/cryptsetup.install 
cryptsetup-2.6.1/debian/cryptsetup.install
--- cryptsetup-2.6.1/debian/cryptsetup.install  2023-12-05 17:48:58.000000000 
+0100
+++ cryptsetup-2.6.1/debian/cryptsetup.install  2024-01-05 18:56:40.000000000 
+0100
@@ -1,9 +1,9 @@
-debian/askpass                          /lib/cryptsetup/
+debian/askpass                          /usr/lib/cryptsetup/
 debian/bash_completion/cryptdisks_start /usr/share/bash-completion/completions/
-debian/checks/*                         /lib/cryptsetup/checks/
-debian/cryptdisks-functions             /lib/cryptsetup/
-debian/functions                        /lib/cryptsetup/
-debian/scripts/cryptdisks_*             /sbin/
-debian/scripts/decrypt_*                /lib/cryptsetup/scripts/
+debian/checks/*                         /usr/lib/cryptsetup/checks/
+debian/cryptdisks-functions             /usr/lib/cryptsetup/
+debian/functions                        /usr/lib/cryptsetup/
+debian/scripts/cryptdisks_*             /usr/sbin/
+debian/scripts/decrypt_*                /usr/lib/cryptsetup/scripts/
 debian/scripts/luksformat               /usr/sbin/
-debian/scripts/passdev                  /lib/cryptsetup/scripts/
+debian/scripts/passdev                  /usr/lib/cryptsetup/scripts/
diff --minimal -Nru cryptsetup-2.6.1/debian/cryptsetup.lintian-overrides 
cryptsetup-2.6.1/debian/cryptsetup.lintian-overrides
--- cryptsetup-2.6.1/debian/cryptsetup.lintian-overrides        2023-12-05 
17:48:58.000000000 +0100
+++ cryptsetup-2.6.1/debian/cryptsetup.lintian-overrides        2024-01-05 
18:56:40.000000000 +0100
@@ -1,3 +1,7 @@
 init.d-script-does-not-implement-status-option [etc/init.d/cryptdisks]
 init.d-script-does-not-implement-status-option [etc/init.d/cryptdisks-early]
 no-debconf-config
+# begin-remove-after: released:forky
+# DEP17 mitigation aliased diversion for cryptsetup-nuke-password
+cryptsetup: diversion-for-unknown-file lib/cryptsetup/askpass [preinst:*]
+# end-remove-after: released:forky
diff --minimal -Nru cryptsetup-2.6.1/debian/cryptsetup.postinst 
cryptsetup-2.6.1/debian/cryptsetup.postinst
--- cryptsetup-2.6.1/debian/cryptsetup.postinst 2023-12-05 17:48:58.000000000 
+0100
+++ cryptsetup-2.6.1/debian/cryptsetup.postinst 2024-01-05 18:56:40.000000000 
+0100
@@ -14,6 +14,21 @@
 #          <failed-install-package> <version> `removing'
 #          <conflicting-package> <version>
 
+# begin-remove-after: released:forky
+if [ "$1" = configure ] &&
+       [ "$(dpkg-divert --truename /usr/lib/cryptsetup/askpass)" = 
/usr/lib/cryptsetup/askpass.usr-is-merged ] &&
+       [ "$(dpkg-divert --listpackage /usr/lib/cryptsetup/askpass)" = 
cryptsetup-nuke-password ]; then
+       # /usr/lib/cryptsetup/askpass is still diverted in the same way as our
+       # preinst did.  Conclude that cryptsetup-nuke-password was installed
+       # during preinst, we duplicated the diversion and now
+       # cryptsetup-nuke-password is removed. We have to clean up.
+       echo "Removing duplicated diversion of /usr/lib/cryptsetup/askpass 
after cryptsetup-nuke-password is removed."
+       dpkg-divert --rename --package cryptsetup-nuke-password \
+               --divert /usr/lib/cryptsetup/askpass.usr-is-merged \
+               --remove /usr/lib/cryptsetup/askpass
+fi
+# end-remove-after
+
 case "$1" in
     configure)
         for file in cryptdisks_start cryptdisks_stop; do
diff --minimal -Nru cryptsetup-2.6.1/debian/cryptsetup.preinst 
cryptsetup-2.6.1/debian/cryptsetup.preinst
--- cryptsetup-2.6.1/debian/cryptsetup.preinst  2023-12-05 17:48:58.000000000 
+0100
+++ cryptsetup-2.6.1/debian/cryptsetup.preinst  2024-01-05 18:56:40.000000000 
+0100
@@ -8,6 +8,20 @@
        EOC
 fi
 
+# begin-remove-after: released:forky
+if [ "$1" = "upgrade" ] || [ "$1" = install ]; then
+       if [ "$(dpkg-divert --truename /lib/cryptsetup/askpass)" = 
/lib/cryptsetup/askpass.cryptsetup ] &&
+               [ "$(dpkg-divert --listpackage /lib/cryptsetup/askpass)" = 
cryptsetup-nuke-password ] &&
+               [ "$(dpkg-divert --truename /usr/lib/cryptsetup/askpass)" = 
/usr/lib/cryptsetup/askpass ]; then
+               # A pre-/usr-merge cryptsetup-nuke-password is installed.
+               echo "Mitigating diversion of /lib/cryptsetup/askpass on behalf 
of cryptsetup-nuke-password"
+               dpkg-divert --no-rename --package cryptsetup-nuke-password \
+                           --divert /usr/lib/cryptsetup/askpass.usr-is-merged \
+                           --add /usr/lib/cryptsetup/askpass
+       fi
+fi
+# end-remove-after
+
 #DEBHELPER#
 
 exit 0
diff --minimal -Nru cryptsetup-2.6.1/debian/libcryptsetup-dev.install 
cryptsetup-2.6.1/debian/libcryptsetup-dev.install
--- cryptsetup-2.6.1/debian/libcryptsetup-dev.install   2023-12-05 
17:48:58.000000000 +0100
+++ cryptsetup-2.6.1/debian/libcryptsetup-dev.install   2024-01-05 
18:56:40.000000000 +0100
@@ -1,3 +1,3 @@
-lib/${DEB_HOST_MULTIARCH}/*.so
-lib/${DEB_HOST_MULTIARCH}/pkgconfig/*.pc 
/usr/lib/${DEB_HOST_MULTIARCH}/pkgconfig/
+usr/lib/${DEB_HOST_MULTIARCH}/*.so
+usr/lib/${DEB_HOST_MULTIARCH}/pkgconfig/*.pc
 usr/include/*.h
diff --minimal -Nru cryptsetup-2.6.1/debian/libcryptsetup12-udeb.install 
cryptsetup-2.6.1/debian/libcryptsetup12-udeb.install
--- cryptsetup-2.6.1/debian/libcryptsetup12-udeb.install        2023-12-05 
17:48:58.000000000 +0100
+++ cryptsetup-2.6.1/debian/libcryptsetup12-udeb.install        2024-01-05 
18:56:40.000000000 +0100
@@ -1 +1 @@
-lib/${DEB_HOST_MULTIARCH}/*.so.*
+usr/lib/${DEB_HOST_MULTIARCH}/*.so.*
diff --minimal -Nru cryptsetup-2.6.1/debian/libcryptsetup12.install 
cryptsetup-2.6.1/debian/libcryptsetup12.install
--- cryptsetup-2.6.1/debian/libcryptsetup12.install     2023-12-05 
17:48:58.000000000 +0100
+++ cryptsetup-2.6.1/debian/libcryptsetup12.install     2024-01-05 
18:56:40.000000000 +0100
@@ -1 +1 @@
-lib/${DEB_HOST_MULTIARCH}/*.so.*
+usr/lib/${DEB_HOST_MULTIARCH}/*.so.*
diff --minimal -Nru cryptsetup-2.6.1/debian/not-installed 
cryptsetup-2.6.1/debian/not-installed
--- cryptsetup-2.6.1/debian/not-installed       2023-12-05 17:48:58.000000000 
+0100
+++ cryptsetup-2.6.1/debian/not-installed       2024-01-05 18:56:40.000000000 
+0100
@@ -1,2 +1,2 @@
-lib/${DEB_HOST_MULTIARCH}/libcryptsetup.la
-lib/${DEB_HOST_MULTIARCH}/cryptsetup/libcryptsetup-token-ssh.la
+usr/lib/${DEB_HOST_MULTIARCH}/libcryptsetup.la
+usr/lib/${DEB_HOST_MULTIARCH}/cryptsetup/libcryptsetup-token-ssh.la
diff --minimal -Nru cryptsetup-2.6.1/debian/rules cryptsetup-2.6.1/debian/rules
--- cryptsetup-2.6.1/debian/rules       2023-12-05 17:48:58.000000000 +0100
+++ cryptsetup-2.6.1/debian/rules       2024-01-05 18:56:40.000000000 +0100
@@ -24,8 +24,6 @@
 
 override_dh_auto_configure:
        dh_auto_configure -- $(CONFFLAGS) \
-               --libdir=/lib/$(DEB_HOST_MULTIARCH) \
-               --sbindir=/sbin \
                --with-tmpfilesdir=/usr/lib/tmpfiles.d \
                --enable-libargon2 \
                --enable-shared \
@@ -85,13 +83,13 @@
        dh_bugfiles -A
 
 execute_after_dh_fixperms-arch:
-       chmod 0755 debian/cryptsetup/lib/cryptsetup/checks/*
-       chmod 0755 debian/cryptsetup/lib/cryptsetup/scripts/decrypt_*
-       chmod 0755 
debian/cryptsetup-suspend/lib/cryptsetup/scripts/suspend/cryptsetup-suspend-wrapper
-       chmod 0755 
debian/cryptsetup-suspend/lib/systemd/system-shutdown/cryptsetup-suspend.shutdown
+       chmod 0755 debian/cryptsetup/usr/lib/cryptsetup/checks/*
+       chmod 0755 debian/cryptsetup/usr/lib/cryptsetup/scripts/decrypt_*
+       chmod 0755 
debian/cryptsetup-suspend/usr/lib/cryptsetup/scripts/suspend/cryptsetup-suspend-wrapper
+       chmod 0755 
debian/cryptsetup-suspend/usr/lib/systemd/system-shutdown/cryptsetup-suspend.shutdown
 ifeq (,$(filter noudeb, $(DEB_BUILD_PROFILES)))
-       chmod 0755 debian/cryptsetup-udeb/lib/cryptsetup/checks/*
-       chmod 0755 debian/cryptsetup-udeb/lib/cryptsetup/scripts/decrypt_*
+       chmod 0755 debian/cryptsetup-udeb/usr/lib/cryptsetup/checks/*
+       chmod 0755 debian/cryptsetup-udeb/usr/lib/cryptsetup/scripts/decrypt_*
 endif
 
 execute_after_dh_fixperms-indep:

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