pyenv/libexec/pyenv-version-name

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#!/usr/bin/env bash
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# Summary: Show the current Python version
set -e
[ -n "$PYENV_DEBUG" ] && set -x
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if [ -z "$PYENV_VERSION" ]; then
PYENV_VERSION_FILE="$(pyenv-version-file)"
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PYENV_VERSION="$(pyenv-version-file-read "$PYENV_VERSION_FILE" || true)"
fi
OLDIFS="$IFS"
IFS=$'\n' scripts=(`pyenv-hooks version-name`)
IFS="$OLDIFS"
for script in "${scripts[@]}"; do
source "$script"
done
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if [ -z "$PYENV_VERSION" ] || [ "$PYENV_VERSION" = "system" ]; then
echo "system"
exit
fi
version_exists() {
local version="$1"
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[ -d "${PYENV_ROOT}/versions/${version}" ]
}
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versions=()
OLDIFS="$IFS"
{ IFS=:
any_not_installed=0
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for version in ${PYENV_VERSION}; do
if version_exists "$version" || [ "$version" = "system" ]; then
versions=("${versions[@]}" "${version}")
elif version_exists "${version#python-}"; then
versions=("${versions[@]}" "${version#python-}")
elif resolved_version="$(pyenv-latest -b "$version")"; then
versions=("${versions[@]}" "${resolved_version}")
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else
echo "pyenv: version \`$version' is not installed (set by $(pyenv-version-origin))" >&2
any_not_installed=1
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fi
done
}
IFS="$OLDIFS"
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OLDIFS="$IFS"
{ IFS=:
echo "${versions[*]}"
}
IFS="$OLDIFS"
if [ "$any_not_installed" = 1 ]; then
exit 1
fi