Allow more customization for backup app deployment

rattail_fabric/deploy/backup/backup-everything.mako

@@ -2,10 +2,12 @@
 
 if [ "$1" = "-v" -o "$1" = "--verbose" ]; then
     VERBOSE='--verbose'
+    QUIET=
     PROGRESS='--progress'
     CONFIG='app/rattail.conf'
 else
     VERBOSE=
+    QUIET='--quiet'
     PROGRESS=
     CONFIG='app/silent.conf'
 fi
@@ -14,5 +16,15 @@ fi
 cd /srv/envs/${envname}
 
 RATTAIL="bin/rattail --config=$CONFIG $PROGRESS"
+PIP='bin/pip'
+export PIP_CONFIG_FILE=pip.conf
+
+$PIP install --upgrade pip
+
+cd src/rattail
+sudo -u ${user} git pull $QUIET
+sudo -u ${user} find . -name '*.pyc' -delete
+cd -
+$PIP install --upgrade --upgrade-strategy eager --editable src/rattail
 
 $RATTAIL backup