Below is a simple Python script that will traverse your online SVN repo and run the necessary commands to convert it to Mercurial. This is probably useless to most, but it saved me a great deal of time converting a large set of repos so I figured posting it couldn’t hurt:

#!/usr/bin/env python

#   SETTINGS
SVN_REPO = 'https://svn.dlasley.net' #< Web location of SVN repos
HG_PATH = r'/home/hg/data' #< Local location for newly converted HG repos 

#   DO NOT EDIT PAST THIS LINE
import subprocess
import urllib2
import os
import re

#   Extract SVN repos from web based front end
svn_repos = re.findall(r'<li><a href="(.*)">.*</a></li>',
                       urllib2.urlopen(SVN_REPO).read())

#   Loop svn_repos and perform conversion
for repo in svn_repos:
    hg_path = os.path.join(HG_PATH, repo)
    if not os.path.isdir(hg_path): #< Make clean HG dir if needed
        os.mkdir(hg_path)

    # Perform HG Convert command on repo and print results
    print subprocess.check_output(['hg', 'convert', '%s/%s' % (SVN_REPO, repo), repo])

More detailed instructions for conversion of SVN to HG can be found here

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