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Revision 1.27 - (show annotations) (download)
Mon Aug 7 00:21:49 2006 UTC (7 years, 11 months ago) by liquidx
Branch: MAIN
Changes since 1.26: +3 -3 lines
update error message in python and distutils eclass to reflect USE flag renaming from tcltk to tk. (#142954)

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 1.26 2006/07/14 15:13:32 marienz 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
23 if [[ -n "${NEED_PYTHON}" ]] ; then
24 DEPEND=">=dev-lang/python-${NEED_PYTHON}"
25 RDEPEND="${DEPEND}"
26 fi
27
28 __python_eclass_test() {
29 __python_version_extract 2.3
30 echo -n "2.3 -> PYVER: $PYVER PYVER_MAJOR: $PYVER_MAJOR"
31 echo " PYVER_MINOR: $PYVER_MINOR PYVER_MICRO: $PYVER_MICRO"
32 __python_version_extract 2.3.4
33 echo -n "2.3.4 -> PYVER: $PYVER PYVER_MAJOR: $PYVER_MAJOR"
34 echo " PYVER_MINOR: $PYVER_MINOR PYVER_MICRO: $PYVER_MICRO"
35 __python_version_extract 2.3.5
36 echo -n "2.3.5 -> PYVER: $PYVER PYVER_MAJOR: $PYVER_MAJOR"
37 echo " PYVER_MINOR: $PYVER_MINOR PYVER_MICRO: $PYVER_MICRO"
38 __python_version_extract 2.4
39 echo -n "2.4 -> PYVER: $PYVER PYVER_MAJOR: $PYVER_MAJOR"
40 echo " PYVER_MINOR: $PYVER_MINOR PYVER_MICRO: $PYVER_MICRO"
41 }
42
43 #
44 # name: python_disable/enable_pyc
45 # desc: tells python not to automatically recompile modules to .pyc/.pyo
46 # even if the timestamps/version stamps don't match. this is
47 # done to protect sandbox.
48 #
49 # note: supported by >=dev-lang/python-2.2.3-r3 only.
50 #
51 python_disable_pyc() {
52 export PYTHON_DONTCOMPILE=1
53 }
54
55 python_enable_pyc() {
56 unset PYTHON_DONTCOMPILE
57 }
58
59 python_disable_pyc
60
61 #
62 # name: python_version
63 # desc: run without arguments and it will export the version of python
64 # currently in use as $PYVER
65 #
66
67 __python_version_extract() {
68 verstr=$1
69 export PYVER_MAJOR=${verstr:0:1}
70 export PYVER_MINOR=${verstr:2:1}
71 export PYVER_MICRO=${verstr:4}
72 export PYVER="${PYVER_MAJOR}.${PYVER_MINOR}"
73 }
74
75 python_version() {
76 local tmpstr
77 python=${python:-/usr/bin/python}
78 tmpstr="$(${python} -V 2>&1 )"
79 export PYVER_ALL="${tmpstr#Python }"
80 __python_version_extract $PYVER_ALL
81 }
82
83 #
84 # name: python_makesym
85 # desc: run without arguments, it will create the /usr/bin/python symlinks
86 # to the latest installed version
87 #
88 python_makesym() {
89 alternatives_auto_makesym "/usr/bin/python" "python[0-9].[0-9]"
90 alternatives_auto_makesym "/usr/bin/python2" "python2.[0-9]"
91 }
92
93 #
94 # name: python_tkinter_exists
95 # desc: run without arguments, checks if python was compiled with Tkinter
96 # support. If not, prints an error message and dies.
97 #
98 python_tkinter_exists() {
99 if ! python -c "import Tkinter" >/dev/null 2>&1; then
100 eerror "You need to recompile python with Tkinter support."
101 eerror "Try adding: 'dev-lang/python X tk'"
102 eerror "in to /etc/portage/package.use"
103 echo
104 die "missing tkinter support with installed python"
105 fi
106 }
107
108 #
109 # name: python_mod_exists
110 # desc: run with the module name as an argument. it will check if a
111 # python module is installed and loadable. it will return
112 # TRUE(0) if the module exists, and FALSE(1) if the module does
113 # not exist.
114 # exam:
115 # if python_mod_exists gtk; then
116 # echo "gtk support enabled
117 # fi
118 #
119 python_mod_exists() {
120 [ -z "$1" ] && die "${FUNCTION} requires an argument!"
121 if ! python -c "import $1" >/dev/null 2>&1; then
122 return 1
123 fi
124 return 0
125 }
126
127 #
128 # name: python_mod_compile
129 # desc: given a filename, it will pre-compile the module's .pyc and .pyo.
130 # should only be run in pkg_postinst()
131 # exam:
132 # python_mod_compile ${ROOT}usr/lib/python2.3/site-packages/pygoogle.py
133 #
134 python_mod_compile() {
135 # allow compiling for older python versions
136 if [ -n "${PYTHON_OVERRIDE_PYVER}" ]; then
137 PYVER=${PYTHON_OVERRIDE_PYVER}
138 else
139 python_version
140 fi
141
142 if [ -f "$1" ]; then
143 python${PYVER} -c "import py_compile; py_compile.compile('${1}')" || \
144 ewarn "Failed to compile ${1}"
145 python${PYVER} -O -c "import py_compile; py_compile.compile('${1}')" || \
146 ewarn "Failed to compile ${1}"
147 else
148 ewarn "Unable to find ${1}"
149 fi
150 }
151
152 #
153 # name: python_mod_optimize
154 # desc: if no arguments supplied, it will recompile all modules under
155 # sys.path (eg. /usr/lib/python2.3, /usr/lib/python2.3/site-packages/ ..)
156 # no recursively
157 #
158 # if supplied with arguments, it will recompile all modules recursively
159 # in the supplied directory
160 # exam:
161 # python_mod_optimize ${ROOT}usr/share/codegen
162 #
163 python_mod_optimize() {
164 local myroot
165 # strip trailing slash
166 myroot="${ROOT%/}"
167
168 # allow compiling for older python versions
169 if [ -n "${PYTHON_OVERRIDE_PYVER}" ]; then
170 PYVER=${PYTHON_OVERRIDE_PYVER}
171 else
172 python_version
173 fi
174
175 # set opts
176 if [ "${PYVER}" = "2.2" ]; then
177 compileopts=""
178 else
179 compileopts="-q"
180 fi
181
182 ebegin "Byte compiling python modules for python-${PYVER} .."
183 python${PYVER} ${myroot}/usr/lib/python${PYVER}/compileall.py ${compileopts} $@
184 python${PYVER} -O ${myroot}/usr/lib/python${PYVER}/compileall.py ${compileopts} $@
185 eend $?
186 }
187
188 #
189 # name: python_mod_cleanup
190 # desc: run with optional arguments, where arguments are directories of
191 # python modules. if none given, it will look in /usr/lib/python[0-9].[0-9]
192 #
193 # it will recursively scan all compiled python modules in the directories
194 # and determine if they are orphaned (eg. their corresponding .py is missing.)
195 # if they are, then it will remove their corresponding .pyc and .pyo
196 #
197 python_mod_cleanup() {
198 local SEARCH_PATH myroot
199
200 # strip trailing slash
201 myroot="${ROOT%/}"
202
203 if [ $# -gt 0 ]; then
204 for path in $@; do
205 SEARCH_PATH="${SEARCH_PATH} ${myroot}/${path#/}"
206 done
207 else
208 for path in ${myroot}/usr/lib*/python*/site-packages; do
209 SEARCH_PATH="${SEARCH_PATH} ${path}"
210 done
211 fi
212
213 for path in ${SEARCH_PATH}; do
214 einfo "Cleaning orphaned Python bytecode from ${path} .."
215 for obj in $(find ${path} -name *.pyc); do
216 src_py="${obj%c}"
217 if [ ! -f "${src_py}" ]; then
218 einfo "Purging ${src_py}[co]"
219 rm -f ${src_py}[co]
220 fi
221 done
222 # attempt to remove directories that maybe empty
223 for dir in $(find ${path} -type d | sort -r); do
224 rmdir ${dir} 2>/dev/null
225 done
226 done
227 }

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