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#!/usr/bin/python
"""
Simulates svnrdump by replaying an existing dump from a file, taking care
of the specified revision range.
To simulate incremental imports the environment variable SVNRMAX can be set
to the highest revision that should be available.
"""
import sys
import os
if sys.hexversion < 0x02040000:
# The limiter is the ValueError() calls. This may be too conservative
sys.stderr.write("svnrdump-sim.py: requires Python 2.4 or later.\n")
sys.exit(1)
def getrevlimit():
var = 'SVNRMAX'
if var in os.environ:
return os.environ[var]
return None
def writedump(url, lower, upper):
if url.startswith('sim://'):
filename = url[6:]
if filename[-1] == '/':
filename = filename[:-1] # remove terminating slash
else:
raise ValueError('sim:// url required')
f = open(filename, 'r')
state = 'header'
wroterev = False
while(True):
l = f.readline()
if l == '':
break
if state == 'header' and l.startswith('Revision-number: '):
state = 'prefix'
if state == 'prefix' and l == 'Revision-number: %s\n' % lower:
state = 'selection'
if not upper == 'HEAD' and state == 'selection' and \
l == 'Revision-number: %s\n' % upper:
break
if state == 'header' or state == 'selection':
if state == 'selection':
wroterev = True
sys.stdout.write(l)
return wroterev
if __name__ == "__main__":
if not (len(sys.argv) in (3, 4, 5)):
print("usage: %s dump URL -rLOWER:UPPER")
sys.exit(1)
if not sys.argv[1] == 'dump':
raise NotImplementedError('only "dump" is suppported.')
url = sys.argv[2]
r = ('0', 'HEAD')
if len(sys.argv) == 4 and sys.argv[3][0:2] == '-r':
r = sys.argv[3][2:].lstrip().split(':')
if not getrevlimit() is None:
r[1] = getrevlimit()
if writedump(url, r[0], r[1]):
ret = 0
else:
ret = 1
sys.exit(ret)