pyenv/libexec/rbenv-version-name

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#!/usr/bin/env bash
set -e
DEFAULT_PATH="${HOME}/.rbenv/default"
if [ -z "$RBENV_VERSION" ]; then
RBENV_VERSION_FILE="$(rbenv-version-file)"
RBENV_VERSION="$(rbenv-version-file-read "$RBENV_VERSION_FILE" || true)"
fi
if [ "$RBENV_VERSION" = "system" ]; then
echo "$RBENV_VERSION"
exit
fi
RBENV_VERSION_PATH="${HOME}/.rbenv/versions/${RBENV_VERSION}"
if [ -d "$RBENV_VERSION_PATH" ]; then
echo "$RBENV_VERSION"
else
echo "rbenv: version \`$RBENV_VERSION' is not installed" >&2
exit 1
fi