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Revision 1.4 - (show annotations) (download)
Thu Oct 9 15:11:24 2003 UTC (11 years, 2 months ago) by liquidx
Branch: MAIN
Changes since 1.3: +10 -4 lines
make PYTHON_DONTCOMPILE default for the moment

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 1.3 2003/10/09 08:57:20 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
21
22 ECLASS="python"
23 INHERITED="$INHERITED $ECLASS"
24
25 python_disable_pyc() {
26 export PYTHON_DONTCOMPILE=1
27 }
28
29 python_enable_pyc() {
30 unset PYTHON_DONTCOMPILE
31 }
32
33 python_disable_pyc
34
35 #
36 # name: python_version
37 # desc: run without arguments and it will export the version of python
38 # currently in use as $PYVER
39 #
40 python_version() {
41 local tmpstr
42 python=${python:-/usr/bin/python}
43 tmpstr="$(${python} -V 2>&1 )"
44 export PYVER_ALL="${tmpstr#Python }"
45
46 export PYVER_MAJOR=$(echo ${PYVER_ALL} | cut -d. -f1)
47 export PYVER_MINOR=$(echo ${PYVER_ALL} | cut -d. -f2)
48 export PYVER_MICRO=$(echo ${PYVER_ALL} | cut -d. -f3-)
49 export PYVER="${PYVER_MAJOR}.${PYVER_MINOR}"
50 }
51
52 #
53 # name: python_makesym
54 # desc: run without arguments, it will create the /usr/bin/python symlinks
55 # to the latest installed version
56 #
57 python_makesym() {
58 alternatives_auto_makesym "/usr/bin/python" "/usr/bin/python[0-9].[0-9]"
59 alternatives_auto_makesym "/usr/bin/python2" "/usr/bin/python[0-9].[0-9]"
60 }
61
62 #
63 # name: python_tkinter_exists
64 # desc: run without arguments, it will return TRUE(0) if python is compiled
65 # with tkinter or FALSE(1) if python is compiled without tkinter.
66 #
67 python_tkinter_exists() {
68 if ! python -c "import Tkinter" >/dev/null 2>&1; then
69 eerror "You need to recompile python with Tkinter support."
70 eerror "That means: USE='tcltk' emerge python"
71 echo
72 die "missing tkinter support with installed python"
73 fi
74 }
75
76 #
77 # name: python_mod_exists
78 # desc: run with the module name as an argument. it will check if a
79 # python module is installed and loadable. it will return
80 # TRUE(0) if the module exists, and FALSE(1) if the module does
81 # not exist.
82 # exam:
83 # if python_mod_exists gtk; then
84 # echo "gtk support enabled
85 # fi
86 #
87 python_mod_exists() {
88 if ! python -c "import $1" >/dev/null 2>&1; then
89 return 1
90 fi
91 return 0
92 }
93
94 #
95 # name: python_mod_compile
96 # desc: given a filename, it will pre-compile the module's .pyc and .pyo.
97 # should only be run in pkg_postinst()
98 # exam:
99 # python_mod_compile ${ROOT}usr/lib/python2.3/site-packages/pygoogle.py
100 #
101 python_mod_compile() {
102 if [ -f "$1" ]; then
103 python -c "import py_compile; py_compile.compile('${1}')" || \
104 ewarn "Failed to compile ${1}"
105 python -O -c "import py_compile; py_compile.compile('${1}')" || \
106 ewarn "Failed to compile ${1}"
107 else
108 ewarn "Unable to find ${1}"
109 fi
110 }
111
112 #
113 # name: python_mod_optimize
114 # desc: if no arguments supplied, it will recompile all modules under
115 # sys.path (eg. /usr/lib/python2.3, /usr/lib/python2.3/site-packages/ ..)
116 # no recursively
117 #
118 # if supplied with arguments, it will recompile all modules recursively
119 # in the supplied directory
120 # exam:
121 # python_mod_optimize ${ROOT}usr/share/codegen
122 #
123 python_mod_optimize() {
124 python_version
125 einfo "Byte Compiling Python modules for ${PYVER} .."
126 python ${ROOT}usr/lib/python${PYVER}/compileall.py -q $@
127 python -O ${ROOT}usr/lib/python${PYVER}/compileall.py -q $@
128 }
129
130 #
131 # name: python_mod_cleanup
132 # desc: run with optional arguments, where arguments are directories of
133 # python modules. if none given, it will look in /usr/lib/python[0-9].[0-9]
134 #
135 # it will recursively scan all compiled python modules in the directories
136 # and determine if they are orphaned (eg. their corresponding .py is missing.)
137 # if they are, then it will remove their corresponding .pyc and .pyo
138 #
139 python_mod_cleanup() {
140 local SEARCH_PATH
141
142 for path in $@; do
143 SEARCH_PATH="${SEARCH_PATH} ${ROOT}${dir}"
144 done
145
146 for path in ${ROOT}usr/lib/python*/site-packages; do
147 SEARCH_PATH="${SEARCH_PATH} ${path}"
148 done
149
150 for path in ${SEARCH_PATH}; do
151 einfo "Searching ${path} .."
152 for obj in $(find ${path} -name *.pyc); do
153 src_py="$(echo $obj | sed 's:c$::')"
154 if [ ! -f "${src_py}" ]; then
155 einfo "Purging ${src_py}[co]"
156 rm -f ${src_py}[co]
157 fi
158 done
159 done
160 }

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