pyenv/libexec/pyenv-exec

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#!/usr/bin/env bash
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#
# Summary: Run an executable with the selected Python version
#
# Usage: pyenv exec <command> [arg1 arg2...]
#
# Runs an executable by first preparing PATH so that the selected Python
# version's `bin' directory is at the front.
#
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# For example, if the currently selected Python version is 2.7.6:
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# pyenv exec pip install -rrequirements.txt
#
# is equivalent to:
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# PATH="$PYENV_ROOT/versions/2.7.6/bin:$PATH" pip install -rrequirements.txt
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set -e
[ -n "$PYENV_DEBUG" ] && set -x
# Provide pyenv completions
if [ "$1" = "--complete" ]; then
exec pyenv shims --short
fi
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PYENV_VERSION="$(pyenv-version-name)"
PYENV_COMMAND="$1"
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if [ -z "$PYENV_COMMAND" ]; then
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pyenv-help --usage exec >&2
exit 1
fi
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export PYENV_VERSION
PYENV_COMMAND_PATH="$(pyenv-which "$PYENV_COMMAND")"
PYENV_BIN_PATH="${PYENV_COMMAND_PATH%/*}"
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OLDIFS="$IFS"
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IFS=$'\n' scripts=(`pyenv-hooks exec`)
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IFS="$OLDIFS"
for script in "${scripts[@]}"; do
source "$script"
done
shift 1
if [ "$PYENV_VERSION" != "system" ]; then
export PATH="${PYENV_BIN_PATH}:${PATH}"
fi
exec -a "$PYENV_COMMAND" "$PYENV_COMMAND_PATH" "$@"