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annotate scripts/dump_dbm_sessions_db.py @ 7695:2be7a8f66ea7

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fix: windows install using pip mislocates share directory The setup code that tries to make the share install path absolute prependeds something like: c:\program files\python_venv to the paths. The equivalent on linux is recognized as an absolute path. On windows this is treated oddly. This resulted in the share files being placed in: c:\program files\python_venv\Lib\site-packages\program files\python_venv\share Roundup was unable to find the files there. On windows (where the platform starts with 'win') don't make the path absolute. This puts share in: c:\program files\python_venv\Lib\share and Roundup finds them. The translations and templates are found by the roundup-server. The docs are also installed under the share directory. The man pages are not installed as windows doesn't have groff to format the source documents. This is the second fix from issues getting Roundup running on windows discussed on mailing list by Simon Eigeldinger. Thread starts with: https://sourceforge.net/p/roundup/mailman/message/41557096/ subject: Installing Roundup on Windows 2023-10-05.
author John Rouillard <rouilj@ieee.org>
date Sun, 05 Nov 2023 23:01:29 -0500
parents 1188bb423f92
children 9ba04f37896f
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1 #! /usr/bin/env python3
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2 """Usage: dump_dbm_sessions_db.py [filename]
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3
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4 Simple script to dump the otks and sessions dbm databases. Dumps
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5 sessions db in current directory if no argument is given.
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6
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7 Dump format:
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8
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9 key: <timestamp> data
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10
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11 where <timestamp> is the human readable __timestamp decoded from the
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12 data object. Data object is dumped in json format. With pretty print
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13
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14 key:
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15 <timestamp>
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16 {
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17 key: val,
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18 ...
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19 }
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20
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21 if data is not a python object, print will be key: data or
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22 key:
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23 data
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24
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25 if pretty printed.
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26 """
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27
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28 import argparse, dbm, json, marshal, os, sys
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29 from datetime import datetime
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30
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31 def indent(text, amount, ch=" "):
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32 """ Found at: https://stackoverflow.com/a/8348914
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33 """
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34 padding = amount * ch
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35 return ''.join(padding+line for line in text.splitlines(True))
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36
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37 def print_marshal(k):
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38 d = marshal.loads(db[k])
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39 try:
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40 t = datetime.fromtimestamp(d['__timestamp'])
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41 except (KeyError, TypeError):
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42 # TypeError raised if marshalled data is not a dict (list, tuple etc)
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43 t = "no_timestamp"
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44 if args.pretty:
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45 print("%s:\n %s\n%s"%(k, t, indent(json.dumps(
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46 d, sort_keys=True, indent=4), 4)))
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47 else:
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48 print("%s: %s %s"%(k, t, d))
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49
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50 def print_raw(k):
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51 if args.pretty:
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52 print("%s:\n %s"%(k, db[k]))
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53 else:
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54 print("%s: %s"%(k, db[k]))
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55
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56 parser = argparse.ArgumentParser(
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57 description='Dump DBM files used by Roundup in storage order.')
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58 parser.add_argument('-k', '--key', action="append",
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59 help='dump the entry for a key, can be used multiple times.')
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60 parser.add_argument('-K', '--keysonly', action='store_true',
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61 help='print the database keys, sorted in byte order.')
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62 parser.add_argument('-p', '--pretty', action='store_true',
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63 help='pretty print the output rather than printing on one line.')
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64 parser.add_argument('file', nargs='?',
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65 help='file to be dumped ("sessions" if not provided)')
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66 args = parser.parse_args()
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67
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68 if args.file:
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69 file = args.file
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70 else:
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71 file="sessions"
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72
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73 try:
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74 db = dbm.open(file)
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75 except Exception as e:
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76 print("Unable to open database for %s: %s"%(file, e))
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77 try:
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78 os.stat(file)
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79 print(" perhaps file is invalid or was created with a different version of Python?")
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80 except OSError:
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81 # the file does exist on disk.
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82 pass
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83 exit(1)
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84
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85 if args.keysonly:
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86 for k in sorted(db.keys()):
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87 print("%s"%k)
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88 exit(0)
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89
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90 if args.key:
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91 for k in args.key:
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92 try:
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93 print_marshal(k)
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94 except (ValueError):
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95 print_raw(k)
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96 exit(0)
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97
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98 k = db.firstkey()
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99 while k is not None:
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100 try:
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101 print_marshal(k)
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102 except (ValueError): # ValueError marshal.loads failed
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103 print_raw(k)
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104
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105 k = db.nextkey(k)
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