[eclass] copied file from main tree

1 files changed, 163 insertions, 0 deletions

diff --git a/eclass/virtualx.eclass b/eclass/virtualx.eclass
new file mode 100644
index 0000000..52d1284
--- /dev/null
+++ b/eclass/virtualx.eclass
@@ -0,0 +1,163 @@
+# Copyright 1999-2010 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Header: /var/cvsroot/gentoo-x86/eclass/virtualx.eclass,v 1.35 2010/05/15 05:40:46 dirtyepic Exp $
+
+# Original author: Martin Schlemmer <azarah@gentoo.org>
+
+# @ECLASS: virtualx.eclass
+# @MAINTAINER:
+#  x11@gentoo.org
+# @BLURB: This eclass can be used for packages that needs a working X environment to build.
+
+# @ECLASS-VARIABLE: VIRTUALX_REQUIRED
+# @DESCRIPTION:
+#  Is a dependency on xorg-server and xhost needed?
+#  Valid values are "always", "optional", and "manual".
+#  "tests" is a synonym for "optional".
+: ${VIRTUALX_REQUIRED:=optional}
+
+# @ECLASS-VARIABLE: VIRTUALX_USE
+# @DESCRIPTION:
+#  If VIRTUALX_REQUIRED=optional, what USE flag should control
+#  the dependency?
+: ${VIRTUALX_USE:=test}
+
+# @ECLASS-VARIABLE: VIRTUALX_DEPEND
+# @DESCRIPTION:
+#  Dep string available for use outside of eclass, in case a more
+#  complicated dep is needed.
+VIRTUALX_DEPEND="!prefix? ( x11-base/xorg-server )
+	x11-apps/xhost"
+
+case ${VIRTUALX_REQUIRED} in
+	always)
+		DEPEND="${VIRTUALX_DEPEND}"
+		RDEPEND=""
+		;;
+	optional|tests)
+		DEPEND="${VIRTUALX_USE}? ( ${VIRTUALX_DEPEND} )"
+		RDEPEND=""
+		IUSE="${VIRTUALX_USE}"
+		;;
+	manual)
+		;;
+	*)
+		eerror "Invalid value (${VIRTUALX_REQUIRED}) for VIRTUALX_REQUIRED"
+		eerror "Valid values are:"
+		eerror "  always"
+		eerror "  optional (default if unset)"
+		eerror "  manual"
+		die "Invalid value (${VIRTUALX_REQUIRED}) for VIRTUALX_REQUIRED"
+		;;
+esac
+
+virtualmake() {
+	local retval=0
+	local OLD_SANDBOX_ON="${SANDBOX_ON}"
+	local XVFB=$(type -p Xvfb)
+	local XHOST=$(type -p xhost)
+
+	# If $DISPLAY is not set, or xhost cannot connect to an X
+	# display, then do the Xvfb hack.
+	if [[ -n ${XVFB} && -n ${XHOST} ]] && \
+	   ( [[ -z ${DISPLAY} ]] || ! (${XHOST} &>/dev/null) ) ; then
+		export XAUTHORITY=
+		# The following is derived from Mandrake's hack to allow
+		# compiling without the X display
+
+		einfo "Scanning for an open DISPLAY to start Xvfb ..."
+
+		# We really do not want SANDBOX enabled here
+		export SANDBOX_ON="0"
+
+		local i=0
+		XDISPLAY=$(i=0; while [[ -f /tmp/.X${i}-lock ]] ; do ((i++));done; echo ${i})
+
+		# If we are in a chrooted environment, and there is already a
+		# X server started outside of the chroot, Xvfb will fail to start
+		# on the same display (most cases this is :0 ), so make sure
+		# Xvfb is started, else bump the display number
+		#
+		# Azarah - 5 May 2002
+		#
+		# Changed the mode from 800x600x32 to 800x600x24 because the mfb
+		# support has been dropped in Xvfb in the xorg-x11 pre-releases.
+		# For now only depths up to 24-bit are supported.
+		#
+		# Sven Wegener <swegener@gentoo.org> - 22 Aug 2004
+		#
+		# Use "-fp built-ins" because it's only part of the default font path
+		# for Xorg but not the other DDXs (Xvfb, Kdrive, etc). Temporarily fixes
+		# bug 278487 until xorg-server is properly patched
+		#
+		# Rémi Cardona <remi@gentoo.org> (10 Aug 2009)
+		${XVFB} :${XDISPLAY} -fp built-ins -screen 0 800x600x24 &>/dev/null &
+		sleep 2
+
+		local start=${XDISPLAY}
+		while [[ ! -f /tmp/.X${XDISPLAY}-lock ]] ; do
+			# Stop trying after 15 tries
+			if ((XDISPLAY - start > 15)) ; then
+
+				eerror ""
+				eerror "Unable to start Xvfb."
+				eerror ""
+				eerror "'${XVFB} :${XDISPLAY} -fp built-ins -screen 0 800x600x24' returns:"
+				eerror ""
+				${XVFB} :${XDISPLAY} -fp built-ins -screen 0 800x600x24
+				eerror ""
+				eerror "If possible, correct the above error and try your emerge again."
+				eerror ""
+				die
+			fi
+
+			((XDISPLAY++))
+			${XVFB} :${XDISPLAY} -fp built-ins -screen 0 800x600x24 &>/dev/null &
+			sleep 2
+		done
+
+		# Now enable SANDBOX again if needed.
+		export SANDBOX_ON="${OLD_SANDBOX_ON}"
+
+		einfo "Starting Xvfb on \$DISPLAY=${XDISPLAY} ..."
+
+		export DISPLAY=:${XDISPLAY}
+		#Do not break on error, but setup $retval, as we need
+		#to kill Xvfb
+		${maketype} "$@"
+		retval=$?
+
+		#Now kill Xvfb
+		kill $(cat /tmp/.X${XDISPLAY}-lock)
+	else
+		#Normal make if we can connect to an X display
+		${maketype} "$@"
+		retval=$?
+	fi
+
+	return ${retval}
+}
+
+# @FUNCTION: Xmake
+# @DESCRIPTION: 
+#  Same as "make", but set up the Xvfb hack if needed.
+Xmake() {
+	export maketype="make"
+	virtualmake "$@"
+}
+
+# @FUNCTION: Xemake
+# @DESCRIPTION: 
+#  Same as "emake", but set up the Xvfb hack if needed.
+Xemake() {
+	export maketype="emake"
+	virtualmake "$@"
+}
+
+# @FUNCTION: Xeconf
+# @DESCRIPTION: 
+#  Same as "econf", but set up the Xvfb hack if needed.
+Xeconf() {
+	export maketype="econf"
+	virtualmake "$@"
+}