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# Copyright 1999-2012 Gentoo Foundation |
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# Distributed under the terms of the GNU General Public License v2 |
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# $Header: /var/cvsroot/gentoo-x86/eclass/python-r1.eclass,v 1.16 2012/11/01 21:49:34 mgorny Exp $ |
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|
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# @ECLASS: python-r1 |
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# @MAINTAINER: |
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# Michał Górny <mgorny@gentoo.org> |
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# Python herd <python@gentoo.org> |
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# @AUTHOR: |
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# Author: Michał Górny <mgorny@gentoo.org> |
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# Based on work of: Krzysztof Pawlik <nelchael@gentoo.org> |
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# @BLURB: A common, simple eclass for Python packages. |
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# @DESCRIPTION: |
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# A common eclass providing helper functions to build and install |
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# packages supporting being installed for multiple Python |
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# implementations. |
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# |
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# This eclass sets correct IUSE and REQUIRED_USE. It exports PYTHON_DEPS |
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# and PYTHON_USEDEP so you can create correct dependencies for your |
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# package easily. It also provides methods to easily run a command for |
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# each enabled Python implementation and duplicate the sources for them. |
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# |
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# Please note that this eclass is mostly intended to be extended |
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# on-request. If you find something you used in other eclasses missing, |
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# please don't hack it around and request an enhancement instead. |
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|
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case "${EAPI}" in |
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0|1|2|3) |
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die "Unsupported EAPI=${EAPI} (too old) for ${ECLASS}" |
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;; |
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4|5) |
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# EAPI=4 needed for REQUIRED_USE |
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;; |
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*) |
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die "Unsupported EAPI=${EAPI} (unknown) for ${ECLASS}" |
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;; |
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esac |
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|
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inherit multilib |
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|
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# @ECLASS-VARIABLE: _PYTHON_ALL_IMPLS |
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# @INTERNAL |
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# @DESCRIPTION: |
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# All supported Python implementations, most preferred last. |
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_PYTHON_ALL_IMPLS=( |
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jython2_5 |
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pypy1_8 pypy1_9 |
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python3_1 python3_2 python3_3 |
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python2_5 python2_6 python2_7 |
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) |
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|
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# @ECLASS-VARIABLE: PYTHON_COMPAT |
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# @REQUIRED |
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# @DESCRIPTION: |
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# This variable contains a list of Python implementations the package |
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# supports. It must be set before the `inherit' call. It has to be |
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# an array. |
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# |
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# Example: |
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# @CODE |
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# PYTHON_COMPAT=( python2_5 python2_6 python2_7 ) |
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# @CODE |
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# |
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# Please note that you can also use bash brace expansion if you like: |
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# @CODE |
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# PYTHON_COMPAT=( python{2_5,2_6,2_7} ) |
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# @CODE |
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if ! declare -p PYTHON_COMPAT &>/dev/null; then |
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if [[ ${CATEGORY}/${PN} == dev-python/python-exec ]]; then |
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PYTHON_COMPAT=( "${_PYTHON_ALL_IMPLS[@]}" ) |
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else |
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die 'PYTHON_COMPAT not declared.' |
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fi |
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fi |
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|
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# @ECLASS-VARIABLE: PYTHON_REQ_USE |
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# @DEFAULT_UNSET |
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# @DESCRIPTION: |
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# The list of USEflags required to be enabled on the chosen Python |
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# implementations, formed as a USE-dependency string. It should be valid |
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# for all implementations in PYTHON_COMPAT, so it may be necessary to |
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# use USE defaults. |
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# |
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# Example: |
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# @CODE |
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# PYTHON_REQ_USE="gdbm,ncurses(-)?" |
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# @CODE |
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# |
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# It will cause the Python dependencies to look like: |
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# @CODE |
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# python_targets_pythonX_Y? ( dev-lang/python:X.Y[gdbm,ncurses(-)?] ) |
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# @CODE |
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|
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# @ECLASS-VARIABLE: PYTHON_DEPS |
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# @DESCRIPTION: |
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# This is an eclass-generated Python dependency string for all |
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# implementations listed in PYTHON_COMPAT. |
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# |
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# Example use: |
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# @CODE |
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# RDEPEND="${PYTHON_DEPS} |
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# dev-foo/mydep" |
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# DEPEND="${RDEPEND}" |
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# @CODE |
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# |
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# Example value: |
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# @CODE |
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# dev-python/python-exec |
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# python_targets_python2_6? ( dev-lang/python:2.6[gdbm] ) |
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# python_targets_python2_7? ( dev-lang/python:2.7[gdbm] ) |
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# @CODE |
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|
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# @ECLASS-VARIABLE: PYTHON_USEDEP |
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# @DESCRIPTION: |
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# This is an eclass-generated USE-dependency string which can be used to |
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# depend on another Python package being built for the same Python |
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# implementations. |
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# |
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# The generate USE-flag list is compatible with packages using python-r1 |
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# and python-distutils-ng eclasses. It must not be used on packages |
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# using python.eclass. |
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# |
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# Example use: |
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# @CODE |
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# RDEPEND="dev-python/foo[${PYTHON_USEDEP}]" |
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# @CODE |
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# |
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# Example value: |
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# @CODE |
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# python_targets_python2_6?,python_targets_python2_7? |
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# @CODE |
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|
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_python_set_globals() { |
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local flags=( "${PYTHON_COMPAT[@]/#/python_targets_}" ) |
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local optflags=${flags[@]/%/?} |
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|
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IUSE=${flags[*]} |
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REQUIRED_USE="|| ( ${flags[*]} )" |
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PYTHON_USEDEP=${optflags// /,} |
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|
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local usestr |
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[[ ${PYTHON_REQ_USE} ]] && usestr="[${PYTHON_REQ_USE}]" |
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|
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# 1) well, python-exec would suffice as an RDEP |
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# but no point in making this overcomplex, BDEP doesn't hurt anyone |
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# 2) python-exec should be built with all targets forced anyway |
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# but if new targets were added, we may need to force a rebuild |
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PYTHON_DEPS="dev-python/python-exec[${PYTHON_USEDEP}]" |
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local i |
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for i in "${PYTHON_COMPAT[@]}"; do |
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local d |
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case ${i} in |
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python*) |
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d='dev-lang/python';; |
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jython*) |
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d='dev-java/jython';; |
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pypy*) |
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d='dev-python/pypy';; |
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*) |
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die "Invalid implementation: ${i}" |
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esac |
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|
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local v=${i##*[a-z]} |
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PYTHON_DEPS+=" python_targets_${i}? ( ${d}:${v/_/.}${usestr} )" |
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done |
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} |
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_python_set_globals |
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|
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# @ECLASS-VARIABLE: BUILD_DIR |
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# @DESCRIPTION: |
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# The current build directory. In global scope, it is supposed to |
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# contain an initial build directory; if unset, it defaults to ${S}. |
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# |
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# In functions run by python_foreach_impl(), the BUILD_DIR is locally |
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# set to an implementation-specific build directory. That path is |
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# created through appending a hyphen and the implementation name |
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# to the final component of the initial BUILD_DIR. |
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# |
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# Example value: |
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# @CODE |
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# ${WORKDIR}/foo-1.3-python2_6 |
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# @CODE |
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|
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# @ECLASS-VARIABLE: PYTHON |
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# @DESCRIPTION: |
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# The absolute path to the current Python interpreter. |
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# |
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# Set and exported only in commands run by python_foreach_impl(). |
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# |
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# Example value: |
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# @CODE |
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# /usr/bin/python2.6 |
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# @CODE |
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|
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# @ECLASS-VARIABLE: EPYTHON |
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# @DESCRIPTION: |
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# The executable name of the current Python interpreter. |
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# |
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# This variable is used consistently with python.eclass. |
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# |
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# Set and exported only in commands run by python_foreach_impl(). |
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# |
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# Example value: |
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# @CODE |
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# python2.6 |
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# @CODE |
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|
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# @ECLASS-VARIABLE: PYTHON_SITEDIR |
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# @DESCRIPTION: |
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# The path to Python site-packages directory. |
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# |
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# Set and exported on request using python_export(). |
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# |
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# Example value: |
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# @CODE |
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# /usr/lib64/python2.6/site-packages |
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# @CODE |
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|
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# @FUNCTION: python_export |
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# @USAGE: [<impl>] <variables>... |
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# @DESCRIPTION: |
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# Set and export the Python implementation-relevant variables passed |
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# as parameters. |
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# |
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# The optional first parameter may specify the requested Python |
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# implementation (either as PYTHON_TARGETS value, e.g. python2_7, |
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# or an EPYTHON one, e.g. python2.7). If no implementation passed, |
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# the current one will be obtained from ${EPYTHON}. |
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# |
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# The variables which can be exported are: PYTHON, EPYTHON, |
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# PYTHON_SITEDIR. They are described more completely in the eclass |
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# variable documentation. |
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python_export() { |
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debug-print-function ${FUNCNAME} "${@}" |
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|
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local impl var |
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|
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case "${1}" in |
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python*|jython*) |
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impl=${1/_/.} |
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shift |
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;; |
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pypy-c*) |
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impl=${1} |
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shift |
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;; |
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pypy*) |
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local v=${1#pypy} |
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impl=pypy-c${v/_/.} |
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shift |
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;; |
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*) |
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impl=${EPYTHON} |
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[[ ${impl} ]] || die "python_export: no impl nor EPYTHON" |
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;; |
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esac |
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debug-print "${FUNCNAME}: implementation: ${impl}" |
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|
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for var; do |
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case "${var}" in |
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EPYTHON) |
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export EPYTHON=${impl} |
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debug-print "${FUNCNAME}: EPYTHON = ${EPYTHON}" |
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;; |
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PYTHON) |
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export PYTHON=${EPREFIX}/usr/bin/${impl} |
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debug-print "${FUNCNAME}: PYTHON = ${PYTHON}" |
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;; |
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PYTHON_SITEDIR) |
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local dir |
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case "${impl}" in |
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python*) |
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dir=/usr/$(get_libdir)/${impl} |
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;; |
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jython*) |
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dir=/usr/share/${impl}/Lib |
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;; |
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pypy*) |
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dir=/usr/$(get_libdir)/${impl/-c/} |
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;; |
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esac |
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|
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export PYTHON_SITEDIR=${EPREFIX}${dir}/site-packages |
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debug-print "${FUNCNAME}: PYTHON_SITEDIR = ${PYTHON_SITEDIR}" |
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;; |
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*) |
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die "python_export: unknown variable ${var}" |
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esac |
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done |
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} |
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|
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# @FUNCTION: python_get_PYTHON |
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# @USAGE: [<impl>] |
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# @DESCRIPTION: |
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# Obtain and print the path to the Python interpreter for the given |
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# implementation. If no implementation is provided, ${EPYTHON} will |
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# be used. |
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# |
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# If you just need to have PYTHON set (and exported), then it is better |
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# to use python_export() directly instead. |
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python_get_PYTHON() { |
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debug-print-function ${FUNCNAME} "${@}" |
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|
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python_export "${@}" PYTHON |
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echo "${PYTHON}" |
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} |
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|
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# @FUNCTION: python_get_EPYTHON |
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# @USAGE: <impl> |
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# @DESCRIPTION: |
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# Obtain and print the EPYTHON value for the given implementation. |
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# |
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# If you just need to have EPYTHON set (and exported), then it is better |
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# to use python_export() directly instead. |
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python_get_EPYTHON() { |
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debug-print-function ${FUNCNAME} "${@}" |
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|
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python_export "${@}" EPYTHON |
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echo "${EPYTHON}" |
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} |
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|
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# @FUNCTION: python_get_sitedir |
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# @USAGE: [<impl>] |
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# @DESCRIPTION: |
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# Obtain and print the 'site-packages' path for the given |
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# implementation. If no implementation is provided, ${EPYTHON} will |
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# be used. |
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# |
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# If you just need to have PYTHON_SITEDIR set (and exported), then it is |
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# better to use python_export() directly instead. |
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python_get_sitedir() { |
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debug-print-function ${FUNCNAME} "${@}" |
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|
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python_export "${@}" PYTHON_SITEDIR |
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echo "${PYTHON_SITEDIR}" |
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} |
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|
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# @FUNCTION: python_copy_sources |
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# @DESCRIPTION: |
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# Create a single copy of the package sources (${S}) for each enabled |
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# Python implementation. |
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# |
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# The sources are always copied from S to implementation-specific build |
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# directories respecting BUILD_DIR. |
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python_copy_sources() { |
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debug-print-function ${FUNCNAME} "${@}" |
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|
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local impl |
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local bdir=${BUILD_DIR:-${S}} |
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|
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debug-print "${FUNCNAME}: bdir = ${bdir}" |
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einfo "Will copy sources from ${S}" |
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# the order is irrelevant here |
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for impl in "${PYTHON_COMPAT[@]}"; do |
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if use "python_targets_${impl}" |
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then |
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local BUILD_DIR=${bdir%%/}-${impl} |
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|
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einfo "${impl}: copying to ${BUILD_DIR}" |
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debug-print "${FUNCNAME}: [${impl}] cp ${S} => ${BUILD_DIR}" |
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cp -pr "${S}" "${BUILD_DIR}" || die |
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fi |
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done |
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} |
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|
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# @FUNCTION: python_foreach_impl |
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# @USAGE: <command> [<args>...] |
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# @DESCRIPTION: |
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# Run the given command for each of the enabled Python implementations. |
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# If additional parameters are passed, they will be passed through |
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# to the command. If the command fails, python_foreach_impl dies. |
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# If necessary, use ':' to force a successful return. |
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# |
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# For each command being run, EPYTHON, PYTHON and BUILD_DIR are set |
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# locally, and the former two are exported to the command environment. |
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python_foreach_impl() { |
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debug-print-function ${FUNCNAME} "${@}" |
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|
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local impl |
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local bdir=${BUILD_DIR:-${S}} |
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|
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debug-print "${FUNCNAME}: bdir = ${bdir}" |
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for impl in "${_PYTHON_ALL_IMPLS[@]}"; do |
| 384 |
if has "${impl}" "${PYTHON_COMPAT[@]}" && use "python_targets_${impl}" |
| 385 |
then |
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local EPYTHON PYTHON |
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python_export "${impl}" EPYTHON PYTHON |
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local BUILD_DIR=${bdir%%/}-${impl} |
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export EPYTHON PYTHON |
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|
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einfo "${EPYTHON}: running ${@}" |
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"${@}" || die "${EPYTHON}: ${1} failed" |
| 393 |
fi |
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done |
| 395 |
} |
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|
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# @FUNCTION: python_export_best |
| 398 |
# @USAGE: [<variable>...] |
| 399 |
# @DESCRIPTION: |
| 400 |
# Find the best (most preferred) Python implementation enabled |
| 401 |
# and export given variables for it. If no variables are provided, |
| 402 |
# EPYTHON & PYTHON will be exported. |
| 403 |
python_export_best() { |
| 404 |
debug-print-function ${FUNCNAME} "${@}" |
| 405 |
|
| 406 |
[[ ${#} -gt 0 ]] || set -- EPYTHON PYTHON |
| 407 |
|
| 408 |
local impl best |
| 409 |
for impl in "${_PYTHON_ALL_IMPLS[@]}"; do |
| 410 |
if has "${impl}" "${PYTHON_COMPAT[@]}" && use "python_targets_${impl}" |
| 411 |
then |
| 412 |
best=${impl} |
| 413 |
fi |
| 414 |
done |
| 415 |
|
| 416 |
[[ ${best+1} ]] || die "python_export_best(): no implementation found!" |
| 417 |
|
| 418 |
debug-print "${FUNCNAME}: Best implementation is: ${impl}" |
| 419 |
python_export "${impl}" "${@}" |
| 420 |
} |
| 421 |
|
| 422 |
# @FUNCTION: _python_rewrite_shebang |
| 423 |
# @INTERNAL |
| 424 |
# @USAGE: [<EPYTHON>] <path>... |
| 425 |
# @DESCRIPTION: |
| 426 |
# Replaces 'python' executable in the shebang with the executable name |
| 427 |
# of the specified interpreter. If no EPYTHON value (implementation) is |
| 428 |
# used, the current ${EPYTHON} will be used. |
| 429 |
# |
| 430 |
# All specified files must start with a 'python' shebang. A file not |
| 431 |
# having a matching shebang will be refused. The exact shebang style |
| 432 |
# will be preserved in order not to break anything. |
| 433 |
# |
| 434 |
# Example conversions: |
| 435 |
# @CODE |
| 436 |
# From: #!/usr/bin/python -R |
| 437 |
# To: #!/usr/bin/python2.7 -R |
| 438 |
# |
| 439 |
# From: #!/usr/bin/env FOO=bar python |
| 440 |
# To: #!/usr/bin/env FOO=bar python2.7 |
| 441 |
# @CODE |
| 442 |
_python_rewrite_shebang() { |
| 443 |
debug-print-function ${FUNCNAME} "${@}" |
| 444 |
|
| 445 |
local impl |
| 446 |
case "${1}" in |
| 447 |
python*|jython*|pypy-c*) |
| 448 |
impl=${1} |
| 449 |
shift |
| 450 |
;; |
| 451 |
*) |
| 452 |
impl=${EPYTHON} |
| 453 |
[[ ${impl} ]] || die "${FUNCNAME}: no impl nor EPYTHON" |
| 454 |
;; |
| 455 |
esac |
| 456 |
debug-print "${FUNCNAME}: implementation: ${impl}" |
| 457 |
|
| 458 |
local f |
| 459 |
for f; do |
| 460 |
local shebang=$(head -n 1 "${f}") |
| 461 |
debug-print "${FUNCNAME}: path = ${f}" |
| 462 |
debug-print "${FUNCNAME}: shebang = ${shebang}" |
| 463 |
|
| 464 |
if [[ "${shebang} " != *'python '* ]]; then |
| 465 |
eerror "A file does not seem to have a supported shebang:" |
| 466 |
eerror " file: ${f}" |
| 467 |
eerror " shebang: ${shebang}" |
| 468 |
die "${FUNCNAME}: ${f} does not seem to have a valid shebang" |
| 469 |
fi |
| 470 |
|
| 471 |
sed -i -e "1s:python:${impl}:" "${f}" || die |
| 472 |
done |
| 473 |
} |
| 474 |
|
| 475 |
# @FUNCTION: _python_ln_rel |
| 476 |
# @INTERNAL |
| 477 |
# @USAGE: <from> <to> |
| 478 |
# @DESCRIPTION: |
| 479 |
# Create a relative symlink. |
| 480 |
_python_ln_rel() { |
| 481 |
debug-print-function ${FUNCNAME} "${@}" |
| 482 |
|
| 483 |
local from=${1} |
| 484 |
local to=${2} |
| 485 |
|
| 486 |
local frpath=${from%/*}/ |
| 487 |
local topath=${to%/*}/ |
| 488 |
local rel_path= |
| 489 |
|
| 490 |
# remove double slashes |
| 491 |
frpath=${frpath/\/\///} |
| 492 |
topath=${topath/\/\///} |
| 493 |
|
| 494 |
while [[ ${topath} ]]; do |
| 495 |
local frseg=${frpath%%/*} |
| 496 |
local toseg=${topath%%/*} |
| 497 |
|
| 498 |
if [[ ${frseg} != ${toseg} ]]; then |
| 499 |
rel_path=../${rel_path}${frseg:+${frseg}/} |
| 500 |
fi |
| 501 |
|
| 502 |
frpath=${frpath#${frseg}/} |
| 503 |
topath=${topath#${toseg}/} |
| 504 |
done |
| 505 |
rel_path+=${frpath}${1##*/} |
| 506 |
|
| 507 |
debug-print "${FUNCNAME}: ${from} -> ${to}" |
| 508 |
debug-print "${FUNCNAME}: rel_path = ${rel_path}" |
| 509 |
|
| 510 |
ln -fs "${rel_path}" "${to}" |
| 511 |
} |
| 512 |
|
| 513 |
# @FUNCTION: python_replicate_script |
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# @USAGE: <path>... |
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# @DESCRIPTION: |
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# Copy the given script to variants for all enabled Python |
| 517 |
# implementations, then replace it with a symlink to the wrapper. |
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# |
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# All specified files must start with a 'python' shebang. A file not |
| 520 |
# having a matching shebang will be refused. |
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python_replicate_script() { |
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debug-print-function ${FUNCNAME} "${@}" |
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|
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local suffixes=() |
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|
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_add_suffix() { |
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suffixes+=( "${EPYTHON}" ) |
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} |
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python_foreach_impl _add_suffix |
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debug-print "${FUNCNAME}: suffixes = ( ${suffixes[@]} )" |
| 531 |
|
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local f suffix |
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for suffix in "${suffixes[@]}"; do |
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for f; do |
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local newf=${f}-${suffix} |
| 536 |
|
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debug-print "${FUNCNAME}: ${f} -> ${newf}" |
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cp "${f}" "${newf}" || die |
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done |
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|
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_python_rewrite_shebang "${suffix}" "${@/%/-${suffix}}" |
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done |
| 543 |
|
| 544 |
for f; do |
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_python_ln_rel "${ED}"/usr/bin/python-exec "${f}" || die |
| 546 |
done |
| 547 |
} |
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