pyenv/libexec/pyenv-versions

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#!/usr/bin/env bash
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# Summary: List all Python versions available to pyenv
# Usage: pyenv versions [--bare]
#
# Lists all Python versions found in `$PYENV_ROOT/versions/*'.
set -e
[ -n "$PYENV_DEBUG" ] && set -x
if [ "$1" = "--bare" ]; then
hit_prefix=""
miss_prefix=""
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current_versions=()
version_origin=""
include_system=""
else
hit_prefix="* "
miss_prefix=" "
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current_versions=($(IFS=:; for version in $(pyenv-version-name); do echo "$version"; done || true))
version_origin=" (set by $(pyenv-version-origin))"
include_system="1"
fi
array_exists() {
local x car="$1"
shift
for x in "$@"; do
[ "${x}" = "${car}" ] && return 0
done
return 1
}
print_version() {
if array_exists "$1" "${current_versions[@]}"; then
echo "${hit_prefix}${1}${version_origin}"
else
echo "${miss_prefix}${1}"
fi
}
# Include "system" in the non-bare output, if it exists
if [ -n "$include_system" ] && PYENV_VERSION=system pyenv-which python >/dev/null 2>&1; then
print_version system
fi
for path in "${PYENV_ROOT}/versions/"*; do
if [ -d "$path" ]; then
print_version "${path##*/}"
fi
done