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author | Michał Górny <mgorny@gentoo.org> | 2012-10-29 09:46:03 +0000 |
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committer | Michał Górny <mgorny@gentoo.org> | 2012-10-29 09:46:03 +0000 |
commit | 5ee3df46e3986b726491949d25d2ef4ae0d4e831 (patch) | |
tree | f0e2e047866a4129d3f4ba684aeb78fa3a146ee8 /eclass | |
parent | Version bump (diff) | |
download | gentoo-2-5ee3df46e3986b726491949d25d2ef4ae0d4e831.tar.gz gentoo-2-5ee3df46e3986b726491949d25d2ef4ae0d4e831.tar.bz2 gentoo-2-5ee3df46e3986b726491949d25d2ef4ae0d4e831.zip |
Introduce python_replicate_script(), to create copies of a Python script for all installed implementations.
Diffstat (limited to 'eclass')
-rw-r--r-- | eclass/ChangeLog | 6 | ||||
-rw-r--r-- | eclass/python-r1.eclass | 128 |
2 files changed, 132 insertions, 2 deletions
diff --git a/eclass/ChangeLog b/eclass/ChangeLog index 753a175e9c03..4bafbedef7f9 100644 --- a/eclass/ChangeLog +++ b/eclass/ChangeLog @@ -1,6 +1,10 @@ # ChangeLog for eclass directory # Copyright 1999-2012 Gentoo Foundation; Distributed under the GPL v2 -# $Header: /var/cvsroot/gentoo-x86/eclass/ChangeLog,v 1.476 2012/10/29 09:25:04 mgorny Exp $ +# $Header: /var/cvsroot/gentoo-x86/eclass/ChangeLog,v 1.477 2012/10/29 09:46:03 mgorny Exp $ + + 29 Oct 2012; Michał Górny <mgorny@gentoo.org> python-r1.eclass: + Introduce python_replicate_script(), to create copies of a Python script for + all installed implementations. 29 Oct 2012; Michał Górny <mgorny@gentoo.org> python-r1.eclass: Introduce python_export_best() to obtain variables for the most preferred diff --git a/eclass/python-r1.eclass b/eclass/python-r1.eclass index eb54c74b7d06..022d043a5d61 100644 --- a/eclass/python-r1.eclass +++ b/eclass/python-r1.eclass @@ -1,6 +1,6 @@ # Copyright 1999-2012 Gentoo Foundation # Distributed under the terms of the GNU General Public License v2 -# $Header: /var/cvsroot/gentoo-x86/eclass/python-r1.eclass,v 1.10 2012/10/29 09:25:04 mgorny Exp $ +# $Header: /var/cvsroot/gentoo-x86/eclass/python-r1.eclass,v 1.11 2012/10/29 09:46:03 mgorny Exp $ # @ECLASS: python-r1 # @MAINTAINER: @@ -412,3 +412,129 @@ python_export_best() { debug-print "${FUNCNAME}: Best implementation is: ${impl}" python_export "${impl}" "${@}" } + +# @FUNCTION: _python_rewrite_shebang +# @INTERNAL +# @USAGE: [<EPYTHON>] <path>... +# @DESCRIPTION: +# Replaces 'python' executable in the shebang with the executable name +# of the specified interpreter. If no EPYTHON value (implementation) is +# used, the current ${EPYTHON} will be used. +# +# All specified files must start with a 'python' shebang. A file not +# having a matching shebang will be refused. The exact shebang style +# will be preserved in order not to break anything. +# +# Example conversions: +# @CODE +# From: #!/usr/bin/python -R +# To: #!/usr/bin/python2.7 -R +# +# From: #!/usr/bin/env FOO=bar python +# To: #!/usr/bin/env FOO=bar python2.7 +# @CODE +_python_rewrite_shebang() { + debug-print-function ${FUNCNAME} "${@}" + + local impl + case "${1}" in + python*|jython*|pypy-c*) + impl=${1} + shift + ;; + *) + impl=${EPYTHON} + [[ ${impl} ]] || die "${FUNCNAME}: no impl nor EPYTHON" + ;; + esac + debug-print "${FUNCNAME}: implementation: ${impl}" + + local f + for f; do + local shebang=$(head -n 1 "${f}") + debug-print "${FUNCNAME}: path = ${f}" + debug-print "${FUNCNAME}: shebang = ${shebang}" + + if [[ "${shebang} " != *'python '* ]]; then + eerror "A file does not seem to have a supported shebang:" + eerror " file: ${f}" + eerror " shebang: ${shebang}" + die "${FUNCNAME}: ${f} does not seem to have a valid shebang" + fi + + sed -i -e "s:python:${impl}:" "${f}" || die + done +} + +# @FUNCTION: _python_ln_rel +# @USAGE: <from> <to> +# @DESCRIPTION: +# Create a relative symlink. +_python_ln_rel() { + debug-print-function ${FUNCNAME} "${@}" + + local from=${1} + local to=${2} + + local frpath=${from%/*}/ + local topath=${to%/*}/ + local rel_path= + + # remove double slashes + frpath=${frpath/\/\///} + topath=${topath/\/\///} + + while [[ ${topath} ]]; do + local frseg=${frpath%%/*} + local toseg=${topath%%/*} + + if [[ ${frseg} != ${toseg} ]]; then + rel_path=../${rel_path}${frseg:+${frseg}/} + fi + + frpath=${frpath#${frseg}/} + topath=${topath#${toseg}/} + done + rel_path+=${frpath}${1##*/} + + debug-print "${FUNCNAME}: ${from} -> ${to}" + debug-print "${FUNCNAME}: rel_path = ${rel_path}" + + ln -fs "${rel_path}" "${to}" +} + +# @FUNCTION: python_replicate_script +# @USAGE: <path>... +# @DESCRIPTION: +# Copy the given script to variants for all enabled Python +# implementations, then replace it with a symlink to the wrapper. +# +# All specified files must start with a 'python' shebang. A file not +# having a matching shebang will be refused. +python_replicate_script() { + debug-print-function ${FUNCNAME} "${@}" + + local suffixes=() + + _add_suffix() { + suffixes+=( "${EPYTHON}" ) + } + python_foreach_impl _add_suffix + debug-print "${FUNCNAME}: suffixes = ( ${suffixes[@]} )" + + local f suffix + for suffix in "${suffixes[@]}"; do + for f; do + local newf=${f}-${suffix} + + debug-print "${FUNCNAME}: ${f} -> ${newf}" + cp "${f}" "${newf}" || die + done + + _python_rewrite_shebang "${suffix}" "${@/%/-${suffix}}" + done + + for f; do + _python_ln_rel "${ED}"/usr/bin/python-exec "${f}" || die + done +} |