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Revision 1.4 - (show annotations) (download)
Sun Jan 15 19:59:17 2012 UTC (2 years, 11 months ago) by vapier
Branch: MAIN
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1 # Copyright 1999-2012 Gentoo Foundation
2 # Distributed under the terms of the GNU General Public License v2
3 # $Header: /var/cvsroot/gentoo-x86/eclass/cdrom.eclass,v 1.3 2012/01/15 14:13:46 ulm Exp $
4
5 # @ECLASS: cdrom.eclass
6 # @MAINTAINER:
7 # games@gentoo.org
8 # @BLURB: Functions for CD-ROM handling
9 # @DESCRIPTION:
10 # Acquire cd(s) for those lovely cd-based emerges. Yes, this violates
11 # the whole 'non-interactive' policy, but damnit I want CD support!
12 #
13 # With these cdrom functions we handle all the user interaction and
14 # standardize everything. All you have to do is call cdrom_get_cds()
15 # and when the function returns, you can assume that the cd has been
16 # found at CDROM_ROOT.
17
18 if [[ -z ${___ECLASS_ONCE_CDROM} ]]; then
19 ___ECLASS_ONCE_CDROM=1
20
21 inherit portability
22
23 # @ECLASS-VARIABLE: CDROM_DISABLE_PROPERTIES
24 # @DEFAULT_UNSET
25 # @DESCRIPTION:
26 # By default, the eclass sets PROPERTIES="interactive".
27 # A non-empty value of CDROM_DISABLE_PROPERTIES suppresses this.
28
29 if [[ -z ${CDROM_DISABLE_PROPERTIES} ]]; then
30 PROPERTIES="interactive"
31 fi
32
33 # @FUNCTION: cdrom_get_cds
34 # @USAGE: <file on cd1> [file on cd2] [file on cd3] [...]
35 # @DESCRIPTION:
36 # The function will attempt to locate a cd based upon a file that is on
37 # the cd. The more files you give this function, the more cds the cdrom
38 # functions will handle.
39 #
40 # Normally the cdrom functions will refer to the cds as 'cd #1', 'cd #2',
41 # etc... If you want to give the cds better names, then just export
42 # the appropriate CDROM_NAME variable before calling cdrom_get_cds().
43 # Use CDROM_NAME for one cd, or CDROM_NAME_# for multiple cds. You can
44 # also use the CDROM_NAME_SET bash array.
45 #
46 # For those multi cd ebuilds, see the cdrom_load_next_cd() function.
47 cdrom_get_cds() {
48 # first we figure out how many cds we're dealing with by
49 # the # of files they gave us
50 local cdcnt=0
51 local f=
52 for f in "$@" ; do
53 ((++cdcnt))
54 export CDROM_CHECK_${cdcnt}="$f"
55 done
56 export CDROM_TOTAL_CDS=${cdcnt}
57 export CDROM_CURRENT_CD=1
58
59 # now we see if the user gave use CD_ROOT ...
60 # if they did, let's just believe them that it's correct
61 if [[ -n ${CD_ROOT}${CD_ROOT_1} ]] ; then
62 local var=
63 cdcnt=0
64 while [[ ${cdcnt} -lt ${CDROM_TOTAL_CDS} ]] ; do
65 ((++cdcnt))
66 var="CD_ROOT_${cdcnt}"
67 [[ -z ${!var} ]] && var="CD_ROOT"
68 if [[ -z ${!var} ]] ; then
69 eerror "You must either use just the CD_ROOT"
70 eerror "or specify ALL the CD_ROOT_X variables."
71 eerror "In this case, you will need" \
72 "${CDROM_TOTAL_CDS} CD_ROOT_X variables."
73 die "could not locate CD_ROOT_${cdcnt}"
74 fi
75 done
76 export CDROM_ROOT=${CD_ROOT_1:-${CD_ROOT}}
77 einfo "Found CD #${CDROM_CURRENT_CD} root at ${CDROM_ROOT}"
78 export CDROM_SET=-1
79 for f in ${CDROM_CHECK_1//:/ } ; do
80 ((++CDROM_SET))
81 [[ -e ${CDROM_ROOT}/${f} ]] && break
82 done
83 export CDROM_MATCH=${f}
84 return
85 fi
86
87 # User didn't help us out so lets make sure they know they can
88 # simplify the whole process ...
89 if [[ ${CDROM_TOTAL_CDS} -eq 1 ]] ; then
90 einfo "This ebuild will need the ${CDROM_NAME:-cdrom for ${PN}}"
91 echo
92 einfo "If you do not have the CD, but have the data files"
93 einfo "mounted somewhere on your filesystem, just export"
94 einfo "the variable CD_ROOT so that it points to the"
95 einfo "directory containing the files."
96 echo
97 einfo "For example:"
98 einfo "export CD_ROOT=/mnt/cdrom"
99 echo
100 else
101 if [[ -n ${CDROM_NAME_SET} ]] ; then
102 # Translate the CDROM_NAME_SET array into CDROM_NAME_#
103 cdcnt=0
104 while [[ ${cdcnt} -lt ${CDROM_TOTAL_CDS} ]] ; do
105 ((++cdcnt))
106 export CDROM_NAME_${cdcnt}="${CDROM_NAME_SET[$((${cdcnt}-1))]}"
107 done
108 fi
109
110 einfo "This package will need access to ${CDROM_TOTAL_CDS} cds."
111 cdcnt=0
112 while [[ ${cdcnt} -lt ${CDROM_TOTAL_CDS} ]] ; do
113 ((++cdcnt))
114 var="CDROM_NAME_${cdcnt}"
115 [[ ! -z ${!var} ]] && einfo " CD ${cdcnt}: ${!var}"
116 done
117 echo
118 einfo "If you do not have the CDs, but have the data files"
119 einfo "mounted somewhere on your filesystem, just export"
120 einfo "the following variables so they point to the right place:"
121 einfon ""
122 cdcnt=0
123 while [[ ${cdcnt} -lt ${CDROM_TOTAL_CDS} ]] ; do
124 ((++cdcnt))
125 echo -n " CD_ROOT_${cdcnt}"
126 done
127 echo
128 einfo "Or, if you have all the files in the same place, or"
129 einfo "you only have one cdrom, you can export CD_ROOT"
130 einfo "and that place will be used as the same data source"
131 einfo "for all the CDs."
132 echo
133 einfo "For example:"
134 einfo "export CD_ROOT_1=/mnt/cdrom"
135 echo
136 fi
137
138 export CDROM_SET=""
139 export CDROM_CURRENT_CD=0
140 cdrom_load_next_cd
141 }
142
143 # @FUNCTION: cdrom_load_next_cd
144 # @DESCRIPTION:
145 # Some packages are so big they come on multiple CDs. When you're done
146 # reading files off a CD and want access to the next one, just call this
147 # function. Again, all the messy details of user interaction are taken
148 # care of for you. Once this returns, just read the variable CDROM_ROOT
149 # for the location of the mounted CD. Note that you can only go forward
150 # in the CD list, so make sure you only call this function when you're
151 # done using the current CD.
152 cdrom_load_next_cd() {
153 local var
154 ((++CDROM_CURRENT_CD))
155
156 unset CDROM_ROOT
157 var=CD_ROOT_${CDROM_CURRENT_CD}
158 [[ -z ${!var} ]] && var="CD_ROOT"
159 if [[ -z ${!var} ]] ; then
160 var="CDROM_CHECK_${CDROM_CURRENT_CD}"
161 _cdrom_locate_file_on_cd ${!var}
162 else
163 export CDROM_ROOT=${!var}
164 fi
165
166 einfo "Found CD #${CDROM_CURRENT_CD} root at ${CDROM_ROOT}"
167 }
168
169 # this is used internally by the cdrom_get_cds() and cdrom_load_next_cd()
170 # functions. this should *never* be called from an ebuild.
171 # all it does is try to locate a give file on a cd ... if the cd isn't
172 # found, then a message asking for the user to insert the cdrom will be
173 # displayed and we'll hang out here until:
174 # (1) the file is found on a mounted cdrom
175 # (2) the user hits CTRL+C
176 _cdrom_locate_file_on_cd() {
177 local mline=""
178 local showedmsg=0 showjolietmsg=0
179
180 while [[ -z ${CDROM_ROOT} ]] ; do
181 local i=0
182 local -a cdset=(${*//:/ })
183 if [[ -n ${CDROM_SET} ]] ; then
184 cdset=(${cdset[${CDROM_SET}]})
185 fi
186
187 while [[ -n ${cdset[${i}]} ]] ; do
188 local dir=$(dirname ${cdset[${i}]})
189 local file=$(basename ${cdset[${i}]})
190
191 local point= node= fs= foo=
192 while read point node fs foo ; do
193 [[ " cd9660 iso9660 udf " != *" ${fs} "* ]] && \
194 ! [[ ${fs} == "subfs" && ",${opts}," == *",fs=cdfss,"* ]] \
195 && continue
196 point=${point//\040/ }
197 [[ ! -d ${point}/${dir} ]] && continue
198 [[ -z $(find "${point}/${dir}" -maxdepth 1 -iname "${file}") ]] \
199 && continue
200 export CDROM_ROOT=${point}
201 export CDROM_SET=${i}
202 export CDROM_MATCH=${cdset[${i}]}
203 return
204 done <<< "$(get_mounts)"
205
206 ((++i))
207 done
208
209 echo
210 if [[ ${showedmsg} -eq 0 ]] ; then
211 if [[ ${CDROM_TOTAL_CDS} -eq 1 ]] ; then
212 if [[ -z ${CDROM_NAME} ]] ; then
213 einfo "Please insert+mount the cdrom for ${PN} now !"
214 else
215 einfo "Please insert+mount the ${CDROM_NAME} cdrom now !"
216 fi
217 else
218 if [[ -z ${CDROM_NAME_1} ]] ; then
219 einfo "Please insert+mount cd #${CDROM_CURRENT_CD}" \
220 "for ${PN} now !"
221 else
222 local var="CDROM_NAME_${CDROM_CURRENT_CD}"
223 einfo "Please insert+mount the ${!var} cdrom now !"
224 fi
225 fi
226 showedmsg=1
227 fi
228 einfo "Press return to scan for the cd again"
229 einfo "or hit CTRL+C to abort the emerge."
230 echo
231 if [[ ${showjolietmsg} -eq 0 ]] ; then
232 showjolietmsg=1
233 else
234 ewarn "If you are having trouble with the detection"
235 ewarn "of your CD, it is possible that you do not have"
236 ewarn "Joliet support enabled in your kernel. Please"
237 ewarn "check that CONFIG_JOLIET is enabled in your kernel."
238 fi
239 read || die "something is screwed with your system"
240 done
241 }
242
243 fi

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