Add unminimize script for reverting minimization on running system

live-build/auto/build

@@ -56,6 +56,36 @@ EOF
 
 		# Remove docs installed by bootstrap
 		Chroot chroot dpkg-query -f '${binary:Package}\n' -W | Chroot chroot xargs apt-get install --reinstall
+
+                # Add unminimizer script which restores default image behavior
+                mkdir -p chroot/usr/local/sbin
+                cat > chroot/usr/local/sbin/unminimize <<'EOF'
+#!/bin/sh
+
+set -e
+
+if [ -f /etc/dpkg/dpkg.cfg.d/excludes ] || [ -f /etc/dpkg/dpkg.cfg.d/excludes.dpkg-tmp ]; then
+    echo "Re-enabling installation of all documentation in dpkg..."
+    if [ -f /etc/dpkg/dpkg.cfg.d/excludes ]; then
+        mv /etc/dpkg/dpkg.cfg.d/excludes /etc/dpkg/dpkg.cfg.d/excludes.dpkg-tmp
+    fi
+    echo "Updating package list and upgrading packages..."
+    apt-get update
+    # apt-get upgrade asks for confirmation before upgrading packages to let the user stop here
+    apt-get upgrade
+    echo "Restoring system documentation..."
+    echo "Reinstalling packages with files in /usr/share/man/ ..."
+    dpkg -S /usr/share/man/ |sed 's|, |\n|g;s|: [^:]*$||' | DEBIAN_FRONTEND=noninteractive xargs apt-get install --reinstall -y
+    echo "Reinstalling packages with system documentaion in /usr/share/doc/ .."
+    dpkg --verify | awk '/..5......   \/usr\/share\/doc/ {print $2}' | sed 's|/[^/]*$||' | sort |uniq \
+         | xargs dpkg -S | sed 's|, |\n|g;s|: [^:]*$||' | uniq | DEBIAN_FRONTEND=noninteractive xargs apt-get install --reinstall -y
+    if dpkg --verify > /dev/null; then
+       echo "Documentation has been restored successfully."
+       rm /etc/dpkg/dpkg.cfg.d/excludes.dpkg-tmp
+    fi
+fi
+EOF
+                chmod +x chroot/usr/local/sbin/unminimize
         fi
 
 	Chroot chroot "dpkg-divert --quiet --add \