diff options
| -rw-r--r-- | eclass/python-single-r1.eclass | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/eclass/python-single-r1.eclass b/eclass/python-single-r1.eclass index 4d5026fc9b3..9e80866bfb5 100644 --- a/eclass/python-single-r1.eclass +++ b/eclass/python-single-r1.eclass @@ -411,6 +411,64 @@ python_gen_cond_dep() { echo "${matches[@]}" } +# @FUNCTION: python_gen_impl_dep +# @USAGE: [<requested-use-flags> [<impl-pattern>...]] +# @DESCRIPTION: +# Output a dependency on Python implementations with the specified USE +# dependency string appended, or no USE dependency string if called +# without the argument (or with empty argument). If any implementation +# patterns are passed, the output dependencies will be generated only +# for the implementations matching them. +# +# Use this function when you need to request different USE flags +# on the Python interpreter depending on package's USE flags. If you +# only need a single set of interpreter USE flags, just set +# PYTHON_REQ_USE and use ${PYTHON_DEPS} globally. +# +# Example: +# @CODE +# PYTHON_COMPAT=( python{2_7,3_{3,4}} pypy ) +# RDEPEND="foo? ( $(python_gen_impl_dep 'xml(+)') )" +# @CODE +# +# It will cause the variable to look like: +# @CODE +# RDEPEND="foo? ( +# python_single_target_python2_7? ( +# dev-lang/python:2.7[xml(+)] ) +# python_single_target_pypy? ( +# dev-python/pypy[xml(+)] ) )" +# @CODE +python_gen_impl_dep() { + debug-print-function ${FUNCNAME} "${@}" + + local impl pattern + local matches=() + + if [[ ${#_PYTHON_SUPPORTED_IMPLS[@]} -eq 1 ]]; then + flag_prefix=python_targets + else + flag_prefix=python_single_target + fi + + local PYTHON_REQ_USE=${1} + shift + + local patterns=( "${@-*}" ) + for impl in "${_PYTHON_SUPPORTED_IMPLS[@]}"; do + for pattern in "${patterns[@]}"; do + if [[ ${impl} == ${pattern} ]]; then + local PYTHON_PKG_DEP + python_export "${impl}" PYTHON_PKG_DEP + matches+=( "${flag_prefix}_${impl}? ( ${PYTHON_PKG_DEP} )" ) + break + fi + done + done + + echo "${matches[@]}" +} + # @FUNCTION: python_setup # @DESCRIPTION: # Determine what the selected Python implementation is and set |