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# Copyright 1999-2004 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/eclass/python.eclass,v 1.1.1.1 2005/11/30 09:59:24 chriswhite Exp $
#
# Author: Alastair Tse <liquidx@gentoo.org>
#
# A Utility Eclass that should be inherited by anything that deals with
# Python or Python modules.
#
# - Features:
# python_version() - sets PYVER/PYVER_MAJOR/PYVER_MINOR
# python_tkinter_exists() - Checks for tkinter support in python
# python_mod_exists() - Checks if a python module exists
# python_mod_compile() - Compiles a .py file to a .pyc/.pyo
# python_mod_optimize() - Generates .pyc/.pyo precompiled scripts
# python_mod_cleanup() - Goes through /usr/lib*/python* to remove
# orphaned *.pyc *.pyo
# python_makesym() - Makes /usr/bin/python symlinks
inherit alternatives
__python_eclass_test() {
__python_version_extract 2.3
echo -n "2.3 -> PYVER: $PYVER PYVER_MAJOR: $PYVER_MAJOR"
echo " PYVER_MINOR: $PYVER_MINOR PYVER_MICRO: $PYVER_MICRO"
__python_version_extract 2.3.4
echo -n "2.3.4 -> PYVER: $PYVER PYVER_MAJOR: $PYVER_MAJOR"
echo " PYVER_MINOR: $PYVER_MINOR PYVER_MICRO: $PYVER_MICRO"
__python_version_extract 2.3.5
echo -n "2.3.5 -> PYVER: $PYVER PYVER_MAJOR: $PYVER_MAJOR"
echo " PYVER_MINOR: $PYVER_MINOR PYVER_MICRO: $PYVER_MICRO"
__python_version_extract 2.4
echo -n "2.4 -> PYVER: $PYVER PYVER_MAJOR: $PYVER_MAJOR"
echo " PYVER_MINOR: $PYVER_MINOR PYVER_MICRO: $PYVER_MICRO"
}
#
# name: python_disable/enable_pyc
# desc: tells python not to automatically recompile modules to .pyc/.pyo
# even if the timestamps/version stamps don't match. this is
# done to protect sandbox.
#
# note: supported by >=dev-lang/python-2.2.3-r3 only.
#
python_disable_pyc() {
export PYTHON_DONTCOMPILE=1
}
python_enable_pyc() {
unset PYTHON_DONTCOMPILE
}
python_disable_pyc
#
# name: python_version
# desc: run without arguments and it will export the version of python
# currently in use as $PYVER
#
__python_version_extract() {
verstr=$1
export PYVER_MAJOR=${verstr:0:1}
export PYVER_MINOR=${verstr:2:1}
export PYVER_MICRO=${verstr:4}
export PYVER="${PYVER_MAJOR}.${PYVER_MINOR}"
}
python_version() {
local tmpstr
python=${python:-/usr/bin/python}
tmpstr="$(${python} -V 2>&1 )"
export PYVER_ALL="${tmpstr#Python }"
__python_version_extract $PYVER_ALL
}
#
# name: python_makesym
# desc: run without arguments, it will create the /usr/bin/python symlinks
# to the latest installed version
#
python_makesym() {
alternatives_auto_makesym "/usr/bin/python" "python[0-9].[0-9]"
alternatives_auto_makesym "/usr/bin/python2" "python2.[0-9]"
}
#
# name: python_tkinter_exists
# desc: run without arguments, checks if python was compiled with Tkinter
# support. If not, prints an error message and dies.
#
python_tkinter_exists() {
if ! python -c "import Tkinter" >/dev/null 2>&1; then
eerror "You need to recompile python with Tkinter support."
eerror "That means: USE='tcltk' emerge python"
echo
die "missing tkinter support with installed python"
fi
}
#
# name: python_mod_exists
# desc: run with the module name as an argument. it will check if a
# python module is installed and loadable. it will return
# TRUE(0) if the module exists, and FALSE(1) if the module does
# not exist.
# exam:
# if python_mod_exists gtk; then
# echo "gtk support enabled
# fi
#
python_mod_exists() {
[ -z "$1" ] && die "${FUNCTION} requires an argument!"
if ! python -c "import $1" >/dev/null 2>&1; then
return 1
fi
return 0
}
#
# name: python_mod_compile
# desc: given a filename, it will pre-compile the module's .pyc and .pyo.
# should only be run in pkg_postinst()
# exam:
# python_mod_compile ${ROOT}usr/lib/python2.3/site-packages/pygoogle.py
#
python_mod_compile() {
# allow compiling for older python versions
if [ -n "${PYTHON_OVERRIDE_PYVER}" ]; then
PYVER=${PYTHON_OVERRIDE_PYVER}
else
python_version
fi
if [ -f "$1" ]; then
python${PYVER} -c "import py_compile; py_compile.compile('${1}')" || \
ewarn "Failed to compile ${1}"
python${PYVER} -O -c "import py_compile; py_compile.compile('${1}')" || \
ewarn "Failed to compile ${1}"
else
ewarn "Unable to find ${1}"
fi
}
#
# name: python_mod_optimize
# desc: if no arguments supplied, it will recompile all modules under
# sys.path (eg. /usr/lib/python2.3, /usr/lib/python2.3/site-packages/ ..)
# no recursively
#
# if supplied with arguments, it will recompile all modules recursively
# in the supplied directory
# exam:
# python_mod_optimize ${ROOT}usr/share/codegen
#
python_mod_optimize() {
local myroot
# strip trailing slash
myroot="${ROOT%/}"
# allow compiling for older python versions
if [ -n "${PYTHON_OVERRIDE_PYVER}" ]; then
PYVER=${PYTHON_OVERRIDE_PYVER}
else
python_version
fi
# set opts
if [ "${PYVER}" = "2.2" ]; then
compileopts=""
else
compileopts="-q"
fi
ebegin "Byte compiling python modules for python-${PYVER} .."
python${PYVER} ${myroot}/usr/lib/python${PYVER}/compileall.py ${compileopts} $@
python${PYVER} -O ${myroot}/usr/lib/python${PYVER}/compileall.py ${compileopts} $@
eend $?
}
#
# name: python_mod_cleanup
# desc: run with optional arguments, where arguments are directories of
# python modules. if none given, it will look in /usr/lib/python[0-9].[0-9]
#
# it will recursively scan all compiled python modules in the directories
# and determine if they are orphaned (eg. their corresponding .py is missing.)
# if they are, then it will remove their corresponding .pyc and .pyo
#
python_mod_cleanup() {
local SEARCH_PATH myroot
# strip trailing slash
myroot="${ROOT%/}"
if [ $# -gt 0 ]; then
for path in $@; do
SEARCH_PATH="${SEARCH_PATH} ${myroot}/${path#/}"
done
else
for path in ${myroot}/usr/lib*/python*/site-packages; do
SEARCH_PATH="${SEARCH_PATH} ${path}"
done
fi
for path in ${SEARCH_PATH}; do
einfo "Cleaning orphaned Python bytecode from ${path} .."
for obj in $(find ${path} -name *.pyc); do
src_py="${obj%c}"
if [ ! -f "${src_py}" ]; then
einfo "Purging ${src_py}[co]"
rm -f ${src_py}[co]
fi
done
# attempt to remove directories that maybe empty
for dir in $(find ${path} -type d | sort -r); do
rmdir ${dir} 2>/dev/null
done
done
}
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