Add apt-history to debian plugin

plugins/debian/debian.plugin.zsh

@@ -113,9 +113,6 @@ alias allpkgs='aptitude search -F "%p" --disable-columns ~i'
 alias mydeb='time dpkg-buildpackage -rfakeroot -us -uc'
 
 
-
-
-
 # Functions #################################################################
 # create a simple script that can be used to 'duplicate' a system
 apt-copy() {
@@ -132,6 +129,41 @@ apt-copy() {
     chmod +x apt-copy.sh
 }
 
+# Prints apt history
+# Usage:
+#   apt-history install
+#   apt-history upgrade
+#   apt-history remove
+#   apt-history rollback
+#   apt-history list
+# Based On: http://linuxcommando.blogspot.com/2008/08/how-to-show-apt-log-history.html
+apt-history () {
+  case "$1" in
+    install)
+      zgrep --no-filename 'install ' $(ls -rt /var/log/dpkg*)
+      ;;
+    upgrade|remove)
+      zgrep --no-filename $1 $(ls -rt /var/log/dpkg*)
+      ;;
+    rollback)
+      zgrep --no-filename upgrade $(ls -rt /var/log/dpkg*) | \
+        grep "$2" -A10000000 | \
+        grep "$3" -B10000000 | \
+        awk '{print $4"="$5}'
+      ;;
+    list)
+      zcat $(ls -rt /var/log/dpkg*)
+      ;;
+    *)
+      echo "Parameters:"
+      echo " install - Lists all packages that have been installed."
+      echo " upgrade - Lists all packages that have been upgraded."
+      echo " remove - Lists all packages that have been removed."
+      echo " rollback - Lists rollback information."
+      echo " list - Lists all contains of dpkg logs."
+      ;;
+  esac
+}
 
 # Kernel-package building shortcut
 kerndeb () {