88 lines
2.9 KiB
Python
Executable File
88 lines
2.9 KiB
Python
Executable File
#!/usr/bin/env python
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# 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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Creates symlinks for the cfn-* scripts in this directory to /opt/aws/bin
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"""
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import argparse
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import glob
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import os
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import os.path
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def create_symlink(source_file, target_file, override=False):
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if os.path.exists(target_file):
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if (override):
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os.remove(target_file)
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else:
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print('%s already exists, will not replace with symlink'
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% target_file)
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return
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print('%s -> %s' % (source_file, target_file))
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os.symlink(source_file, target_file)
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def check_dirs(source_dir, target_dir):
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print('%s -> %s' % (source_dir, target_dir))
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if source_dir == target_dir:
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print('Source and target are the same %s' % target_dir)
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return False
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if not os.path.exists(target_dir):
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try:
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os.makedirs(target_dir)
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except OSError as exc:
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print('Could not create target directory %s: %s'
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% (target_dir, exc))
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return False
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return True
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def create_symlinks(source_dir, target_dir, glob_pattern, override):
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source_files = glob.glob(os.path.join(source_dir, glob_pattern))
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for source_file in source_files:
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target_file = os.path.join(target_dir, os.path.basename(source_file))
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create_symlink(source_file, target_file, override=override)
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if __name__ == '__main__':
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description = 'Creates symlinks for the cfn-* scripts to /opt/aws/bin'
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parser = argparse.ArgumentParser(description=description)
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parser.add_argument(
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'-t', '--target',
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dest="target_dir",
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help="Target directory to create symlinks",
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default='/opt/aws/bin',
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required=False)
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parser.add_argument(
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'-s', '--source',
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dest="source_dir",
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help="Source directory to create symlinks from. "
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"Defaults to the directory where this script is",
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default='/usr/bin',
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required=False)
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parser.add_argument(
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'-f', '--force',
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dest="force",
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action='store_true',
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help="If specified, will create symlinks even if "
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"there is already a target file",
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required=False)
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args = parser.parse_args()
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if not check_dirs(args.source_dir, args.target_dir):
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exit(1)
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create_symlinks(args.source_dir, args.target_dir, 'cfn-*', args.force)
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