Borrow certain /etc/passwd and /etc/group clean-up steps from hhd-dev/rechunk

build_files/build.sh

@@ -122,6 +122,68 @@ systemctl enable tailscaled
 # Remove dnf5 versionlocks
 dnf5 versionlock clear
 
+## Handle files that rpm-ostree would normally remove
+## Borrowed from: https://github.com/hhd-dev/rechunk/blob/master/1_prune.sh#L33
+if [ -f /etc/passwd ]; then
+  echo
+  echo Appending the following passwd users to /usr/lib/passwd
+  out=$(grep -v "root" /etc/passwd)
+  echo "$out"
+  echo "$out" >>/usr/lib/passwd
+fi
+if [ -f /etc/group ]; then
+  echo
+  echo Appending the following group entries to /usr/lib/group
+  out=$(grep -v "root\|wheel" /etc/group)
+  echo "$out"
+  echo "$out" >>/usr/lib/group
+fi
+
+if [ -f /etc/passwd ] || [ -f /etc/group ]; then
+  echo
+  echo "Warning: Make sure processed users and groups are from installed programs!"
+fi
+
+# Create defaults for /etc/passwd, /etc/group
+cat <<EOT >/etc/passwd
+root:x:0:0:root:/root:/bin/bash
+EOT
+cat <<EOT >/etc/group
+root:x:0:
+wheel:x:10:
+EOT
+
+# Extra lock files created by container processes that might cause issues
+rm -rf \
+  /etc/.pwd.lock \
+  /etc/passwd- \
+  /etc/group- \
+  /etc/shadow- \
+  /etc/gshadow- \
+  /etc/subuid- \
+  /etc/subgid- \
+  /.dockerenv
+
+# Merge /usr/etc to /etc
+# OSTree will error out if both dirs exist
+# And rpm-ostree will be confused and use only one of them
+if [ -d /usr/etc ]; then
+  echo
+  echo WARNING: FOUND /usr/etc. MERGING TO ETC FOR COMPATIBILITY
+  echo EXPECT PERMISSIONS ISSUES ON THE MERGED PATHS
+  echo The following files from /usr/etc will be merged to /etc:
+  tree /usr/etc
+
+  echo
+  rsync -aAX --numeric-ids --checksum --links /usr/etc/ /etc
+  rm -rf /usr/etc
+fi
+
+# Move /etc to /usr/etc
+mv /etc /usr/
+
+# ...normal ublue-inspired steps continue.
+
 # Remove tmp files and everything in dirs that make bootc unhappy
 rm -rf /tmp/* || true
 rm -rf /usr/etc