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180 lines
4.8 KiB
180 lines
4.8 KiB
# Copyright 1999-2021 Gentoo Authors
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# Distributed under the terms of the GNU General Public License v2
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# @ECLASS: virtualx.eclass
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# @MAINTAINER:
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# x11@gentoo.org
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# @AUTHOR:
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# Original author: Martin Schlemmer <azarah@gentoo.org>
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# @SUPPORTED_EAPIS: 6 7 8
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# @BLURB: This eclass can be used for packages that need a working X environment to build.
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case ${EAPI} in
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6|7|8) ;;
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*) die "${ECLASS}: EAPI ${EAPI:-0} is not supported." ;;
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esac
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if [[ ! ${_VIRTUALX_ECLASS} ]]; then
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_VIRTUALX_ECLASS=1
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# @ECLASS-VARIABLE: VIRTUALX_REQUIRED
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# @PRE_INHERIT
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# @DESCRIPTION:
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# Variable specifying the dependency on xorg-server and xhost.
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# Possible special values are "always" and "manual", which specify
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# the dependency to be set unconditionaly or not at all.
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# Any other value is taken as useflag desired to be in control of
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# the dependency (eg. VIRTUALX_REQUIRED="kde" will add the dependency
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# into "kde? ( )" and add kde into IUSE.
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: ${VIRTUALX_REQUIRED:=test}
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# @ECLASS-VARIABLE: VIRTUALX_DEPEND
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# @OUTPUT_VARIABLE
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# @DESCRIPTION:
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# Standard dependencies string that is automatically added to BDEPEND
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# (in EAPI-6: DEPEND) unless VIRTUALX_REQUIRED is set to "manual".
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# DEPRECATED: Pre-EAPI-8 you can specify the variable BEFORE inherit
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# to add more dependencies.
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[[ ${EAPI} != [67] ]] && VIRTUALX_DEPEND=""
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VIRTUALX_DEPEND+="
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x11-base/xorg-server[xvfb]
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x11-apps/xhost
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"
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[[ ${EAPI} != [67] ]] && readonly VIRTUALX_DEPEND
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[[ ${VIRTUALX_COMMAND} ]] && die "VIRTUALX_COMMAND has been removed and is a no-op"
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case ${VIRTUALX_REQUIRED} in
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manual)
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;;
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always)
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BDEPEND="${VIRTUALX_DEPEND}"
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;;
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*)
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BDEPEND="${VIRTUALX_REQUIRED}? ( ${VIRTUALX_DEPEND} )"
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IUSE="${VIRTUALX_REQUIRED}"
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[[ ${VIRTUALX_REQUIRED} == test ]] &&
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RESTRICT+=" !test? ( test )"
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;;
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esac
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[[ ${EAPI} == 6 ]] && DEPEND="${BDEPEND}"
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# @FUNCTION: virtx
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# @USAGE: <command> [command arguments]
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# @DESCRIPTION:
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# Start new Xvfb session and run commands in it.
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#
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# IMPORTANT: The command is run nonfatal !!!
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#
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# This means we are checking for the return code and raise an exception if it
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# isn't 0. So you need to make sure that all commands return a proper
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# code and not just die. All eclass function used should support nonfatal
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# calls properly.
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#
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# The rational behind this is the tear down of the started Xfvb session. A
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# straight die would leave a running session behind.
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#
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# Example:
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#
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# @CODE
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# src_test() {
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# virtx default
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# }
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# @CODE
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#
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# @CODE
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# python_test() {
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# virtx py.test --verbose
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# }
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# @CODE
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#
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# @CODE
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# my_test() {
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# some_command
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# return $?
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# }
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#
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# src_test() {
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# virtx my_test
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# }
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# @CODE
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virtx() {
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debug-print-function ${FUNCNAME} "$@"
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[[ $# -lt 1 ]] && die "${FUNCNAME} needs at least one argument"
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local i=0
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local retval=0
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local OLD_SANDBOX_ON="${SANDBOX_ON}"
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local XVFB XHOST XDISPLAY
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local xvfbargs="-screen 0 1280x1024x24 +extension RANDR"
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XVFB=$(type -p Xvfb) || die
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XHOST=$(type -p xhost) || die
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debug-print "${FUNCNAME}: running Xvfb hack"
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export XAUTHORITY=
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# The following is derived from Mandrake's hack to allow
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# compiling without the X display
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einfo "Scanning for an open DISPLAY to start Xvfb ..."
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# If we are in a chrooted environment, and there is already a
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# X server started outside of the chroot, Xvfb will fail to start
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# on the same display (most cases this is :0 ), so make sure
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# Xvfb is started, else bump the display number
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#
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# Azarah - 5 May 2002
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# GNOME GDM may have started X on DISPLAY :0 with a
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# lock file /tmp/.X1024-lock, therefore start the search at 1.
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# Else a leftover /tmp/.X1-lock will prevent finding an available display.
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XDISPLAY=$(i=1; while [[ -f /tmp/.X${i}-lock ]] ; do ((i++));done; echo ${i})
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debug-print "${FUNCNAME}: XDISPLAY=${XDISPLAY}"
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# We really do not want SANDBOX enabled here
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export SANDBOX_ON="0"
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debug-print "${FUNCNAME}: ${XVFB} :${XDISPLAY} ${xvfbargs}"
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${XVFB} :${XDISPLAY} ${xvfbargs} &>/dev/null &
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sleep 2
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local start=${XDISPLAY}
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while [[ ! -f /tmp/.X${XDISPLAY}-lock ]]; do
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# Stop trying after 15 tries
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if ((XDISPLAY - start > 15)) ; then
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eerror "'${XVFB} :${XDISPLAY} ${xvfbargs}' returns:"
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echo
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${XVFB} :${XDISPLAY} ${xvfbargs}
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echo
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eerror "If possible, correct the above error and try your emerge again."
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die "Unable to start Xvfb"
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fi
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((XDISPLAY++))
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debug-print "${FUNCNAME}: ${XVFB} :${XDISPLAY} ${xvfbargs}"
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${XVFB} :${XDISPLAY} ${xvfbargs} &>/dev/null &
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sleep 2
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done
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# Now enable SANDBOX again if needed.
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export SANDBOX_ON="${OLD_SANDBOX_ON}"
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einfo "Starting Xvfb on \$DISPLAY=${XDISPLAY} ..."
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export DISPLAY=:${XDISPLAY}
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# Do not break on error, but setup $retval, as we need
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# to kill Xvfb
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debug-print "${FUNCNAME}: $@"
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nonfatal "$@"
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retval=$?
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# Now kill Xvfb
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kill $(cat /tmp/.X${XDISPLAY}-lock)
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# die if our command failed
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[[ ${retval} -ne 0 ]] && die "Failed to run '$@'"
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return 0 # always return 0, it can be altered by failed kill for Xvfb
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}
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fi
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