102 lines
2.7 KiB
Bash
Executable File
102 lines
2.7 KiB
Bash
Executable File
#!/usr/bin/env bash
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############################################################################
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# tools/link.sh
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#
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# Licensed to the Apache Software Foundation (ASF) under one or more
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# contributor license agreements. See the NOTICE file distributed with
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# this work for additional information regarding copyright ownership. The
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# ASF licenses this file to you under the Apache License, Version 2.0 (the
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# "License"); you may not use this file except in compliance with the
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# License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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#
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############################################################################
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#set -x
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src=$1
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dest=$2
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# Verify that arguments were provided
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if [ -z "${src}" -o -z "${dest}" ]; then
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echo "Missing src and/or dest arguments"
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exit 1
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fi
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# Check if something already exists at the destination path replace it with
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# the new link (which might be different). Note that we check for the
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# the link (-h) before we check for existence (-e) because a bad link will
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# report that it does not exist.
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if [ -h "${dest}" ]; then
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# If the link is already created (and matches the request) do nothing
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if [ "$(readlink ${dest})" = "${src}" ]; then
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exit 0
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fi
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# Otherwise, remove the link
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rm -f "${dest}"
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else
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# If the path exists and is a directory that contains the "fake link"
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# mark, then treat it like a soft link (i.e., remove the directory)
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if [ -d "${dest}" -a -f "${dest}/.fakelnk" ]; then
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rm -rf "${dest}"
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else
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# Does anything exist at the destination path?
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if [ -e "${dest}" ]; then
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# It is something else (like a file) or directory that does
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# not contain the "fake link" mark
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echo "${dest} already exists but is not a symbolic link"
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exit 1
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fi
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fi
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fi
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# Verify that a directory exists at the source path
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if [ ! -d "${src}" ]; then
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echo "No directory at ${src}"
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exit 1
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fi
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# Create the soft link
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ln -s "${src}" "${dest}" || \
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{ echo "Failed to create link: $dest" ; exit 1 ; }
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# Verify that the link was created
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if [ -e ${dest} ] && [ -h ${dest} ]; then
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# The file exists and is a symlink (i.e. the symlink isn't broken)
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exit 0
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else
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# The MSYS 'ln' command actually does a directory copy
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if [ -d ${dest} ]; then
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# Create the .fakelnk for unlink.sh
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touch ${dest}/.fakelnk
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exit 0
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else
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echo "Error: link at ${dest} not created."
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exit 1
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fi
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fi
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