diff -Nru sbuild-launchpad-chroot-0.7/bin/sbuild-launchpad-chroot sbuild-launchpad-chroot-0.8/bin/sbuild-launchpad-chroot
--- sbuild-launchpad-chroot-0.7/bin/sbuild-launchpad-chroot	2014-07-12 00:22:21.000000000 +1000
+++ sbuild-launchpad-chroot-0.8/bin/sbuild-launchpad-chroot	2015-01-09 12:32:43.000000000 +1100
@@ -117,6 +117,46 @@
     percent = size_read/total_size*100
     print("%.0f %%" % (percent), end='\r')
 
+def update_ppa(args):
+    chroot = args.name
+    
+    print("[%s] Processing config" % chroot)
+    config_path = os.path.join("/etc/schroot/chroot.d/", chroot)
+
+    # Parse the existing configuration
+    config = ConfigParser()
+    config.read(config_path)
+ 
+    aliases = config.get(chroot, 'aliases')
+    series = config.get(chroot, 'launchpad.series')
+    pocket = "proposed"
+    ppa=args.ppa.replace('/','~')
+
+    
+    new_aliases = []
+
+    if args.remove:
+        for a in aliases.split(','):
+            if not ppa in a:
+                new_aliases.append(a)
+    else:
+        new_aliases = aliases.split(',')        
+        for component in ("main", "universe"):
+            a = args.name.replace(series, "%s-%s+%s+%s" %
+                                 (series, pocket, ppa,component))
+            if a not in new_aliases:            
+                new_aliases.append(a)
+                print ('[%s] Adding alias %s'%(chroot, a))
+
+    config.set(args.name, "aliases", ",".join(new_aliases))
+    with open(config_path, "w+") as fd:
+        config.write(fd)
+
+        fd.seek(0)
+        content = fd.read()
+        fd.truncate(0)
+        fd.seek(0)
+        fd.write(content.replace(" = ", "="))
 
 def update_chroot(args):
     chroot = args.name
@@ -287,6 +327,14 @@
     parser_remove.add_argument("-n", "--name", required=True)
     parser_remove.set_defaults(func=remove_chroot)
 
+    # ppa
+    parser_ppa = subparsers.add_parser(
+        'ppa', help="Update ppa sources for Launchpad-based chroot")
+    parser_ppa.add_argument("-n", "--name", required=True)
+    parser_ppa.add_argument("-p", "--ppa", required=True, help='ppa to add aliases for i.e. gnome3-team/gnome3')
+    parser_ppa.add_argument("-r", "--remove", required=False, action='store_true', help='remove aliases for given ppa')
+    parser_ppa.set_defaults(func=update_ppa)
+
     args = parser.parse_args()
 
     # Some checks
diff -Nru sbuild-launchpad-chroot-0.7/debian/changelog sbuild-launchpad-chroot-0.8/debian/changelog
--- sbuild-launchpad-chroot-0.7/debian/changelog	2014-07-12 03:00:01.000000000 +1000
+++ sbuild-launchpad-chroot-0.8/debian/changelog	2015-01-09 12:48:40.000000000 +1100
@@ -1,3 +1,9 @@
+sbuild-launchpad-chroot (0.8) vivid; urgency=medium
+
+  * Add support for adding ppa's via aliases with a new ppa command (LP: #1408853)
+
+ -- Tim Lunn <tim@feathertop.org>  Fri, 09 Jan 2015 12:34:16 +1100
+
 sbuild-launchpad-chroot (0.7) utopic; urgency=medium
 
   * Add missing ubuntu-dev-tools to Build-Depends, as required by
diff -Nru sbuild-launchpad-chroot-0.7/etc/schroot/setup.d/90apt-sources sbuild-launchpad-chroot-0.8/etc/schroot/setup.d/90apt-sources
--- sbuild-launchpad-chroot-0.7/etc/schroot/setup.d/90apt-sources	2014-07-12 00:21:51.000000000 +1000
+++ sbuild-launchpad-chroot-0.8/etc/schroot/setup.d/90apt-sources	2015-01-09 12:33:57.000000000 +1100
@@ -82,6 +82,11 @@
         case "$suite_comp" in
             '')
                 ;;
+            *+*+*)
+                suite=`echo "$suite_comp" | sed -e 's/\+.*//'`
+                comp=`echo "$suite_comp" | sed -e 's/[^\+]*+[^\+]*+//'`
+                ppa=`echo "$suite_comp" | sed -e 's/[^\+]*+//' -e 's/\+.*//'`
+                ;;
             *+*)
                 suite=`echo "$suite_comp" | sed -e 's/\+.*//'`
                 comp=`echo "$suite_comp" | sed -e 's/[^\+]*+//'`
@@ -106,7 +111,10 @@
             '')        ;;
             *) echo "unknown component $comp" 1>&2; exit 1 ;;
         esac
-
+        
+        if [ -n "$ppa" ]; then
+            APT_PPA=`echo "$ppa" | sed -e 's/~/\//'`
+        fi
         APT_POCKETS="$suites"
         APT_COMPONENTS="$comps"
     fi
@@ -142,6 +150,14 @@
         changed=true
     fi
 
+    if [ -n "$APT_PPA" ]; then
+        echo "setting PPA '$APT_PPA' in sources.list"
+        cat /etc/schroot/ppa/gnome3.list
+        series=`echo $CHROOT_NAME | sed 's/\-.*//'`
+        echo "deb http://ppa.launchpad.net/$APT_PPA/ubuntu $series main" >> "$sources"
+        changed=true
+    fi
+
     if [ "$VERBOSE" = 'verbose' -a "$changed" = 'true' ]; then
         echo "Resulting sources.list"
         cat "$sources"