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Revision 1.6 - (show annotations) (download)
Thu Oct 23 23:15:57 2003 UTC (10 years, 5 months ago) by liquidx
Branch: MAIN
Changes since 1.5: +15 -4 lines
filter some stderr output, remove empty directories in python_mod_cleanup and make python_mod_exists use virtualx

1 # Copyright 1999-2003 Gentoo Technologies, Inc.
2 # Distributed under the terms of the GNU General Public License v2
3 # $Header: /home/cvsroot/gentoo-x86/eclass/python.eclass,v 1.5 2003/10/17 07:14:26 liquidx 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 virtualx
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" "/usr/bin/python[0-9].[0-9]"
67 alternatives_auto_makesym "/usr/bin/python2" "/usr/bin/python[0-9].[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 #
91 # note: we use virtualmake from virtualx.eclass to get around
92 # when people build without X available. some packages like
93 # pygtk need X avaiable when being imported.
94 #
95 # exam:
96 # if python_mod_exists gtk; then
97 # echo "gtk support enabled
98 # fi
99 #
100 python_mod_exists() {
101 export maketype="python"
102 if ! virtualmake -c "import $1" >/dev/null 2>&1; then
103 return 1
104 fi
105 return 0
106 }
107
108 #
109 # name: python_mod_compile
110 # desc: given a filename, it will pre-compile the module's .pyc and .pyo.
111 # should only be run in pkg_postinst()
112 # exam:
113 # python_mod_compile ${ROOT}usr/lib/python2.3/site-packages/pygoogle.py
114 #
115 python_mod_compile() {
116 # allow compiling for older python versions
117 if [ -n "${PYTHON_OVERRIDE_PYVER}" ]; then
118 PYVER=${PYTHON_OVERRIDE_PYVER}
119 else
120 python_version
121 fi
122
123 if [ -f "$1" ]; then
124 python${PYVER} -c "import py_compile; py_compile.compile('${1}')" || \
125 ewarn "Failed to compile ${1}"
126 python${PYVER} -O -c "import py_compile; py_compile.compile('${1}')" || \
127 ewarn "Failed to compile ${1}"
128 else
129 ewarn "Unable to find ${1}"
130 fi
131 }
132
133 #
134 # name: python_mod_optimize
135 # desc: if no arguments supplied, it will recompile all modules under
136 # sys.path (eg. /usr/lib/python2.3, /usr/lib/python2.3/site-packages/ ..)
137 # no recursively
138 #
139 # if supplied with arguments, it will recompile all modules recursively
140 # in the supplied directory
141 # exam:
142 # python_mod_optimize ${ROOT}usr/share/codegen
143 #
144 python_mod_optimize() {
145 # allow compiling for older python versions
146 if [ -n "${PYTHON_OVERRIDE_PYVER}" ]; then
147 PYVER=${PYTHON_OVERRIDE_PYVER}
148 else
149 python_version
150 fi
151
152 # set opts
153 if [ "${PYVER}" = "2.2" ]; then
154 compileopts=""
155 else
156 compileopts="-q"
157 fi
158
159 ebegin "Byte Compiling Python modules for ${PYVER} .."
160 python${PYVER} ${ROOT}usr/lib/python${PYVER}/compileall.py ${compileopts} $@
161 python${PYVER} -O ${ROOT}usr/lib/python${PYVER}/compileall.py ${compileopts} $@
162 eend $?
163 }
164
165 #
166 # name: python_mod_cleanup
167 # desc: run with optional arguments, where arguments are directories of
168 # python modules. if none given, it will look in /usr/lib/python[0-9].[0-9]
169 #
170 # it will recursively scan all compiled python modules in the directories
171 # and determine if they are orphaned (eg. their corresponding .py is missing.)
172 # if they are, then it will remove their corresponding .pyc and .pyo
173 #
174 python_mod_cleanup() {
175 local SEARCH_PATH
176
177 if [ $# -gt 0 ]; then
178 for path in $@; do
179 SEARCH_PATH="${SEARCH_PATH} ${ROOT}${path#/}"
180 done
181 else
182 for path in ${ROOT}usr/lib/python*/site-packages; do
183 SEARCH_PATH="${SEARCH_PATH} ${path}"
184 done
185 fi
186
187 for path in ${SEARCH_PATH}; do
188 einfo "Searching ${path} .."
189 for obj in $(find ${path} -name *.pyc | sort -r); do
190 src_py="$(echo $obj | sed 's:c$::')"
191 if [ ! -f "${src_py}" ]; then
192 einfo "Purging ${src_py}[co]"
193 rm -f ${src_py}[co]
194 # clean up directory if it is empty
195 current_dir="`dirname ${obj}`"
196 if [ `ls -1 --color=none $current_dir | wc -l 2> /dev/null` -lt 1 ]; then
197 rmdir -f ${current_dir}
198 fi
199 fi
200 done
201 done
202 }

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