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: /etc/alternatives/ [ drwxr-xr-x ]
name : jsonpatch #! /usr/bin/python3 # -*- coding: utf-8 -*- import sys import os.path import json import jsonpatch import tempfile import argparse parser = argparse.ArgumentParser( description='Apply a JSON patch on a JSON file') parser.add_argument('ORIGINAL', type=argparse.FileType('r'), help='Original file') parser.add_argument('PATCH', type=argparse.FileType('r'), nargs='?', default=sys.stdin, help='Patch file (read from stdin if omitted)') parser.add_argument('--indent', type=int, default=None, help='Indent output by n spaces') parser.add_argument('-b', '--backup', action='store_true', help='Back up ORIGINAL if modifying in-place') parser.add_argument('-i', '--in-place', action='store_true', help='Modify ORIGINAL in-place instead of to stdout') parser.add_argument('-v', '--version', action='version', version='%(prog)s ' + jsonpatch.__version__) def main(): try: patch_files() except KeyboardInterrupt: sys.exit(1) def patch_files(): """ Diffs two JSON files and prints a patch """ args = parser.parse_args() doc = json.load(args.ORIGINAL) patch = json.load(args.PATCH) result = jsonpatch.apply_patch(doc, patch) if args.in_place: dirname = os.path.abspath(os.path.dirname(args.ORIGINAL.name)) try: # Attempt to replace the file atomically. We do this by # creating a temporary file in the same directory as the # original file so we can atomically move the new file over # the original later. (This is done in the same directory # because atomic renames do not work across mount points.) fd, pathname = tempfile.mkstemp(dir=dirname) fp = os.fdopen(fd, 'w') atomic = True except OSError: # We failed to create the temporary file for an atomic # replace, so fall back to non-atomic mode by backing up # the original (if desired) and writing a new file. if args.backup: os.rename(args.ORIGINAL.name, args.ORIGINAL.name + '.orig') fp = open(args.ORIGINAL.name, 'w') atomic = False else: # Since we're not replacing the original file in-place, write # the modified JSON to stdout instead. fp = sys.stdout # By this point we have some sort of file object we can write the # modified JSON to. json.dump(result, fp, indent=args.indent) fp.write('\n') if args.in_place: # Close the new file. If we aren't replacing atomically, this # is our last step, since everything else is already in place. fp.close() if atomic: try: # Complete the atomic replace by linking the original # to a backup (if desired), fixing up the permissions # on the temporary file, and moving it into place. if args.backup: os.link(args.ORIGINAL.name, args.ORIGINAL.name + '.orig') os.chmod(pathname, os.stat(args.ORIGINAL.name).st_mode) os.rename(pathname, args.ORIGINAL.name) except OSError: # In the event we could not actually do the atomic # replace, unlink the original to move it out of the # way and finally move the temporary file into place. os.unlink(args.ORIGINAL.name) os.rename(pathname, args.ORIGINAL.name) if __name__ == "__main__": main()