rbenv/libexec/rbenv-local

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#!/usr/bin/env bash
#
# Summary: Set or show the local directory-specific Ruby version
#
# Usage: rbenv local <version>
# rbenv local --unset
#
# Sets the local directory-specific Ruby version by writing the version
# name to a file named `.ruby-version'.
#
# When you run a Ruby command, rbenv will look for a `.ruby-version'
# file in the current directory and each parent directory. If no such
# file is found in the tree, rbenv will use the global Ruby version
# specified with `rbenv global', or the version specified in the
# RBENV_VERSION environment variable.
#
# For backwards compatibility, rbenv will also read version
# specifications from `.rbenv-version' files, but a `.ruby-version'
# file in the same directory takes precedence.
#
# <version> should be a string matching a Ruby version known to rbenv.
# The special version string `system' will use your default system Ruby.
# Run `rbenv versions' for a list of available Ruby versions.
set -e
[ -n "$RBENV_DEBUG" ] && set -x
# Provide rbenv completions
if [ "$1" = "--complete" ]; then
echo --unset
echo system
exec rbenv-versions --bare
fi
RBENV_VERSION="$1"
if [ "$RBENV_VERSION" = "--unset" ]; then
rm -f .ruby-version .rbenv-version
elif [ -n "$RBENV_VERSION" ]; then
if [ "$(RBENV_VERSION= rbenv-version-origin)" -ef .rbenv-version ]; then
echo "rbenv: migrated .rbenv-version file to .ruby-version" >&2
rm -f .rbenv-version
fi
rbenv-version-file-write .ruby-version "$RBENV_VERSION"
else
rbenv-version-file-read .ruby-version ||
rbenv-version-file-read .rbenv-version ||
{ echo "rbenv: no local version configured for this directory"
exit 1
} >&2
fi