summaryrefslogtreecommitdiff
path: root/eclass/virtualx.eclass
blob: fb6a867a35cca39cb49d85e648d21f02806c7a69 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
# Copyright 1999-2018 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2

# @ECLASS: virtualx.eclass
# @MAINTAINER:
# x11@gentoo.org
# @AUTHOR:
# Original author: Martin Schlemmer <azarah@gentoo.org>
# @SUPPORTED_EAPIS: 4 5 6 7
# @BLURB: This eclass can be used for packages that needs a working X environment to build.

if [[ ! ${_VIRTUAL_X} ]]; then

case "${EAPI:-0}" in
	0|1|2|3)
		die "virtualx.eclass: EAPI ${EAPI} is too old."
		;;
	4|5|6|7)
		;;
	*)
		die "virtualx.eclass: EAPI ${EAPI} is not supported yet."
		;;
esac

[[ ${EAPI} == [45] ]] && inherit eutils

# @ECLASS-VARIABLE: VIRTUALX_REQUIRED
# @DESCRIPTION:
# Variable specifying the dependency on xorg-server and xhost.
# Possible special values are "always" and "manual", which specify
# the dependency to be set unconditionaly or not at all.
# Any other value is taken as useflag desired to be in control of
# the dependency (eg. VIRTUALX_REQUIRED="kde" will add the dependency
# into "kde? ( )" and add kde into IUSE.
: ${VIRTUALX_REQUIRED:=test}

# @ECLASS-VARIABLE: VIRTUALX_DEPEND
# @DESCRIPTION:
# Dep string available for use outside of eclass, in case a more
# complicated dep is needed.
# You can specify the variable BEFORE inherit to add more dependencies.
VIRTUALX_DEPEND="${VIRTUALX_DEPEND}
	!prefix? ( x11-base/xorg-server[xvfb] )
	x11-apps/xhost
"

# @ECLASS-VARIABLE: VIRTUALX_COMMAND
# @DESCRIPTION:
# Command (or eclass function call) to be run in the X11 environment
# (within virtualmake function).
: ${VIRTUALX_COMMAND:="emake"}

case ${VIRTUALX_REQUIRED} in
	manual)
		;;
	always)
		if [[ ${EAPI:-0} != [0123456] ]]; then
			BDEPEND="${VIRTUALX_DEPEND}"
		else
			DEPEND="${VIRTUALX_DEPEND}"
		fi
		RDEPEND=""
		;;
	optional|tests)
		[[ ${EAPI} == [45] ]] \
			|| die 'Values "optional" and "tests" for VIRTUALX_REQUIRED are banned in EAPI > 5'
		# deprecated section YAY.
		eqawarn "VIRTUALX_REQUIRED=optional and VIRTUALX_REQUIRED=tests are deprecated."
		eqawarn "You can drop the variable definition completely from ebuild,"
		eqawarn "because it is default behaviour."

		if [[ -n ${VIRTUALX_USE} ]]; then
			# so they like to specify the useflag
			eqawarn "VIRTUALX_USE variable is deprecated."
			eqawarn "Please read eclass manpage to find out how to use VIRTUALX_REQUIRED"
			eqawarn "to achieve the same behaviour."
		fi

		[[ -z ${VIRTUALX_USE} ]] && VIRTUALX_USE="test"
		DEPEND="${VIRTUALX_USE}? ( ${VIRTUALX_DEPEND} )"
		RDEPEND=""
		IUSE="${VIRTUALX_USE}"
		;;
	*)
		if [[ ${EAPI:-0} != [0123456] ]]; then
			BDEPEND="${VIRTUALX_REQUIRED}? ( ${VIRTUALX_DEPEND} )"
		else
			DEPEND="${VIRTUALX_REQUIRED}? ( ${VIRTUALX_DEPEND} )"
		fi
		RDEPEND=""
		IUSE="${VIRTUALX_REQUIRED}"
		;;
esac

# @FUNCTION: virtualmake
# @DESCRIPTION:
# Function which start new Xvfb session
# where the VIRTUALX_COMMAND variable content gets executed.
virtualmake() {
	debug-print-function ${FUNCNAME} "$@"

	[[ ${EAPI} == [45] ]] \
		|| die "${FUNCNAME} is unsupported in EAPI > 5, please use virtx"

	# backcompat for maketype
	if [[ -n ${maketype} ]]; then
		[[ ${EAPI} == [45] ]] || die "maketype is banned in EAPI > 5"
		eqawarn "ebuild is exporting \$maketype=${maketype}"
		eqawarn "Ebuild should be migrated to use 'virtx command' instead."
		VIRTUALX_COMMAND=${maketype}
	fi

	virtx "${VIRTUALX_COMMAND}" "${@}"
}


# @FUNCTION: virtx
# @USAGE: <command> [command arguments]
# @DESCRIPTION:
# Start new Xvfb session and run commands in it.
#
# IMPORTANT: The command is run nonfatal !!!
#
# This means we are checking for the return code and raise an exception if it
# isn't 0. So you need to make sure that all commands return a proper
# code and not just die. All eclass function used should support nonfatal
# calls properly.
#
# The rational behind this is the tear down of the started Xfvb session. A
# straight die would leave a running session behind.
#
# Example:
#
# @CODE
# src_test() {
# 	virtx default
# }
# @CODE
#
# @CODE
# python_test() {
# 	virtx py.test --verbose
# }
# @CODE
#
# @CODE
# my_test() {
#   some_command
#   return $?
# }
#
# src_test() {
#   virtx my_test
# }
# @CODE
virtx() {
	debug-print-function ${FUNCNAME} "$@"

	[[ $# -lt 1 ]] && die "${FUNCNAME} needs at least one argument"

	local i=0
	local retval=0
	local OLD_SANDBOX_ON="${SANDBOX_ON}"
	local XVFB XHOST XDISPLAY
	local xvfbargs="-screen 0 1280x1024x24 +extension RANDR"
	XVFB=$(type -p Xvfb) || die
	XHOST=$(type -p xhost) || die

	debug-print "${FUNCNAME}: running Xvfb hack"
	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 ..."
	# 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
	XDISPLAY=$(i=0; while [[ -f /tmp/.X${i}-lock ]] ; do ((i++));done; echo ${i})
	debug-print "${FUNCNAME}: XDISPLAY=${XDISPLAY}"

	# We really do not want SANDBOX enabled here
	export SANDBOX_ON="0"

	debug-print "${FUNCNAME}: ${XVFB} :${XDISPLAY} ${xvfbargs}"
	${XVFB} :${XDISPLAY} ${xvfbargs} &>/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 "'${XVFB} :${XDISPLAY} ${xvfbargs}' returns:"
			echo
			${XVFB} :${XDISPLAY} ${xvfbargs}
			echo
			eerror "If possible, correct the above error and try your emerge again."
			die "Unable to start Xvfb"
		fi
			((XDISPLAY++))
		debug-print "${FUNCNAME}: ${XVFB} :${XDISPLAY} ${xvfbargs}"
		${XVFB} :${XDISPLAY} ${xvfbargs} &>/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 $retval, as we need
	# to kill Xvfb
	debug-print "${FUNCNAME}: $@"
	nonfatal "$@"
	retval=$?

	# Now kill Xvfb
	kill $(cat /tmp/.X${XDISPLAY}-lock)

	# die if our command failed
	[[ ${retval} -ne 0 ]] && die "Failed to run '$@'"

	return 0 # always return 0, it can be altered by failed kill for Xvfb
}

# @FUNCTION: Xmake
# @DESCRIPTION:
# Same as "make", but set up the Xvfb hack if needed.
# Deprecated call.
Xmake() {
	debug-print-function ${FUNCNAME} "$@"

	[[ ${EAPI} == [45] ]] \
		|| die "${FUNCNAME} is unsupported in EAPI > 5, please use 'virtx emake -j1 ....'"

	eqawarn "you should not execute make directly"
	eqawarn "rather execute Xemake -j1 if you have issues with parallel make"
	VIRTUALX_COMMAND="emake -j1" virtualmake "$@"
}

# @FUNCTION: Xemake
# @DESCRIPTION:
# Same as "emake", but set up the Xvfb hack if needed.
Xemake() {
	debug-print-function ${FUNCNAME} "$@"

	[[ ${EAPI} == [45] ]] \
		|| die "${FUNCNAME} is unsupported in EAPI > 5, please use 'virtx emake ....'"

	VIRTUALX_COMMAND="emake" virtualmake "$@"
}

# @FUNCTION: Xeconf
# @DESCRIPTION:
# Same as "econf", but set up the Xvfb hack if needed.
Xeconf() {
	debug-print-function ${FUNCNAME} "$@"

	[[ ${EAPI} == [45] ]] \
		|| die "${FUNCNAME} is unsupported in EAPI > 5, please use 'virtx econf ....'"

	VIRTUALX_COMMAND="econf" virtualmake "$@"
}

_VIRTUAL_X=1
fi