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Revision 1.1 - (show annotations) (download)
Fri Jan 13 20:23:06 2012 UTC (2 years, 10 months ago) by ulm
Branch: MAIN
Split out CD-ROM functions from eutils.eclass.

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

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