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Revision 1.15 - (show annotations) (download)
Sun Feb 13 14:05:54 2005 UTC (9 years, 8 months ago) by eradicator
Branch: MAIN
Changes since 1.14: +3 -5 lines
Cleanup orphaned modules in lib{32,64}.

1 # Copyright 1999-2004 Gentoo Foundation
2 # Distributed under the terms of the GNU General Public License v2
3 # $Header: /var/cvsroot/gentoo-x86/eclass/python.eclass,v 1.14 2004/06/25 00:39:48 vapier Exp $
4 #
5 # Author: Alastair Tse <liquidx@gentoo.org>
6 #
7 # A Utility Eclass that should be inherited by anything that deals with
8 # Python or Python modules.
9 #
10 # - Features:
11 # python_version() - sets PYVER/PYVER_MAJOR/PYVER_MINOR
12 # python_tkinter_exists() - Checks for tkinter support in python
13 # python_mod_exists() - Checks if a python module exists
14 # python_mod_compile() - Compiles a .py file to a .pyc/.pyo
15 # python_mod_optimize() - Generates .pyc/.pyo precompiled scripts
16 # python_mod_cleanup() - Goes through /usr/lib*/python* to remove
17 # orphaned *.pyc *.pyo
18 # python_makesym() - Makes /usr/bin/python symlinks
19
20 inherit alternatives
21
22 ECLASS="python"
23 INHERITED="$INHERITED $ECLASS"
24
25 #
26 # name: python_disable/enable_pyc
27 # desc: tells python not to automatically recompile modules to .pyc/.pyo
28 # even if the timestamps/version stamps don't match. this is
29 # done to protect sandbox.
30 #
31 # note: supported by >=dev-lang/python-2.2.3-r3 only.
32 #
33 python_disable_pyc() {
34 export PYTHON_DONTCOMPILE=1
35 }
36
37 python_enable_pyc() {
38 unset PYTHON_DONTCOMPILE
39 }
40
41 python_disable_pyc
42
43 #
44 # name: python_version
45 # desc: run without arguments and it will export the version of python
46 # currently in use as $PYVER
47 #
48 python_version() {
49 local tmpstr
50 python=${python:-/usr/bin/python}
51 tmpstr="$(${python} -V 2>&1 )"
52 export PYVER_ALL="${tmpstr#Python }"
53
54 export PYVER_MAJOR=$(echo ${PYVER_ALL} | cut -d. -f1)
55 export PYVER_MINOR=$(echo ${PYVER_ALL} | cut -d. -f2)
56 export PYVER_MICRO=$(echo ${PYVER_ALL} | cut -d. -f3-)
57 export PYVER="${PYVER_MAJOR}.${PYVER_MINOR}"
58 }
59
60 #
61 # name: python_makesym
62 # desc: run without arguments, it will create the /usr/bin/python symlinks
63 # to the latest installed version
64 #
65 python_makesym() {
66 alternatives_auto_makesym "/usr/bin/python" "python[0-9].[0-9]"
67 alternatives_auto_makesym "/usr/bin/python2" "python2.[0-9]"
68 }
69
70 #
71 # name: python_tkinter_exists
72 # desc: run without arguments, it will return TRUE(0) if python is compiled
73 # with tkinter or FALSE(1) if python is compiled without tkinter.
74 #
75 python_tkinter_exists() {
76 if ! python -c "import Tkinter" >/dev/null 2>&1; then
77 eerror "You need to recompile python with Tkinter support."
78 eerror "That means: USE='tcltk' emerge python"
79 echo
80 die "missing tkinter support with installed python"
81 fi
82 }
83
84 #
85 # name: python_mod_exists
86 # desc: run with the module name as an argument. it will check if a
87 # python module is installed and loadable. it will return
88 # TRUE(0) if the module exists, and FALSE(1) if the module does
89 # not exist.
90 # exam:
91 # if python_mod_exists gtk; then
92 # echo "gtk support enabled
93 # fi
94 #
95 python_mod_exists() {
96 if ! python -c "import $1" >/dev/null 2>&1; then
97 return 1
98 fi
99 return 0
100 }
101
102 #
103 # name: python_mod_compile
104 # desc: given a filename, it will pre-compile the module's .pyc and .pyo.
105 # should only be run in pkg_postinst()
106 # exam:
107 # python_mod_compile ${ROOT}usr/lib/python2.3/site-packages/pygoogle.py
108 #
109 python_mod_compile() {
110 # allow compiling for older python versions
111 if [ -n "${PYTHON_OVERRIDE_PYVER}" ]; then
112 PYVER=${PYTHON_OVERRIDE_PYVER}
113 else
114 python_version
115 fi
116
117 if [ -f "$1" ]; then
118 python${PYVER} -c "import py_compile; py_compile.compile('${1}')" || \
119 ewarn "Failed to compile ${1}"
120 python${PYVER} -O -c "import py_compile; py_compile.compile('${1}')" || \
121 ewarn "Failed to compile ${1}"
122 else
123 ewarn "Unable to find ${1}"
124 fi
125 }
126
127 #
128 # name: python_mod_optimize
129 # desc: if no arguments supplied, it will recompile all modules under
130 # sys.path (eg. /usr/lib/python2.3, /usr/lib/python2.3/site-packages/ ..)
131 # no recursively
132 #
133 # if supplied with arguments, it will recompile all modules recursively
134 # in the supplied directory
135 # exam:
136 # python_mod_optimize ${ROOT}usr/share/codegen
137 #
138 python_mod_optimize() {
139 local myroot
140 # strip trailing slash
141 myroot=$(echo ${ROOT} | sed 's:/$::')
142
143 # allow compiling for older python versions
144 if [ -n "${PYTHON_OVERRIDE_PYVER}" ]; then
145 PYVER=${PYTHON_OVERRIDE_PYVER}
146 else
147 python_version
148 fi
149
150 # set opts
151 if [ "${PYVER}" = "2.2" ]; then
152 compileopts=""
153 else
154 compileopts="-q"
155 fi
156
157 ebegin "Byte compiling python modules for python-${PYVER} .."
158 python${PYVER} ${myroot}/usr/lib/python${PYVER}/compileall.py ${compileopts} $@
159 python${PYVER} -O ${myroot}/usr/lib/python${PYVER}/compileall.py ${compileopts} $@
160 eend $?
161 }
162
163 #
164 # name: python_mod_cleanup
165 # desc: run with optional arguments, where arguments are directories of
166 # python modules. if none given, it will look in /usr/lib/python[0-9].[0-9]
167 #
168 # it will recursively scan all compiled python modules in the directories
169 # and determine if they are orphaned (eg. their corresponding .py is missing.)
170 # if they are, then it will remove their corresponding .pyc and .pyo
171 #
172 python_mod_cleanup() {
173 local SEARCH_PATH myroot
174
175 # strip trailing slash
176 myroot=$(echo ${ROOT} | sed 's:/$::')
177
178 if [ $# -gt 0 ]; then
179 for path in $@; do
180 SEARCH_PATH="${SEARCH_PATH} ${myroot}/${path#/}"
181 done
182 else
183 for path in ${myroot}/usr/lib*/python*/site-packages; do
184 SEARCH_PATH="${SEARCH_PATH} ${path}"
185 done
186 fi
187
188 for path in ${SEARCH_PATH}; do
189 einfo "Cleaning orphaned Python bytecode from ${path} .."
190 for obj in $(find ${path} -name *.pyc); do
191 src_py="$(echo $obj | sed 's:c$::')"
192 if [ ! -f "${src_py}" ]; then
193 einfo "Purging ${src_py}[co]"
194 rm -f ${src_py}[co]
195 fi
196 done
197 # attempt to remove directories that maybe empty
198 for dir in $(find ${path} -type d | sort -r); do
199 rmdir ${dir} 2>/dev/null
200 done
201 done
202 }

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