~launchpad-pqm/launchpad/devel

#!/bin/bash

#

# Copyright 2011 Canonical Ltd.  This software is licensed under the

# GNU Affero General Public License version 3 (see the file LICENSE).

#

# Wrapper that provides a default Xvfb environment for the given

# command.

#

# If the command is not found it is searched for in the same directory

# as this script. This lets you do `bin/with-xvfb iharness` for

# example.

#

# Follows sinzui's advice to the launchpad-dev list:

#   https://lists.launchpad.net/launchpad-dev/msg07879.html

#

set -eu

# Look for $1 - i.e. the command to run - in this script's directory

# if it's not found along the default PATH.

if [ $# -ge 1 ] && ! type -P "$1" > /dev/null

then

    if command="$(PATH="$(dirname "$0")" type -P "$1")"

    then

        # Shift $1 off and set new positional arguments.

        shift && set -- "$${command}" "$@"

    fi

# If no command has been given and SHELL is set, spawn a shell.

elif [ $# -eq 0 -a -n "$${SHELL:-}" ]

then

    set -- "$${SHELL}"

fi

#

# --auto-servernum

#   Try to get a free server number, starting at 99. See xvfb-run(1).

#

# --server-args=

#   -ac disables host-based access control mechanisms. See Xserver(1).

#   -screen forces a screen configuration. At the time of writing

#      there is some disagreement between xvfb-run(1) and Xvfb(1)

#      about what the default is.

#

exec xvfb-run \

    --server-args="-ac -screen 0 1024x768x24" \

    --auto-servernum -- "$@"