# Read the output of a "svn log --xml" command on stdin, parse it and

# print a subset of attributes common to all svn versions tested by

# hg.

def xmltext(e):

    return ''.join(c.data for c

                   in e.childNodes

                   if c.nodeType == c.TEXT_NODE)

def parseentry(entry):

    e = {}

    e['revision'] = entry.getAttribute('revision')

    e['author'] = xmltext(entry.getElementsByTagName('author')[0])

    e['msg'] = xmltext(entry.getElementsByTagName('msg')[0])

    e['paths'] = []

    paths = entry.getElementsByTagName('paths')

    if paths:

        paths = paths[0]

        for p in paths.getElementsByTagName('path'):

            action = p.getAttribute('action')

            path = xmltext(p)

            frompath = p.getAttribute('copyfrom-path')

            fromrev = p.getAttribute('copyfrom-rev')

            e['paths'].append((path, action, frompath, fromrev))

    return e

def parselog(data):

    entries = []

    doc = xml.dom.minidom.parseString(data)

    for e in doc.getElementsByTagName('logentry'):

        entries.append(parseentry(e))

    return entries

def printentries(entries):

    fp = sys.stdout

    for e in entries:

        for k in ('revision', 'author', 'msg'):

            fp.write(('%s: %s\n' % (k, e[k])).encode('utf-8'))

        for path, action, fpath, frev in sorted(e['paths']):

            frominfo = ''

            if frev:

                frominfo = ' (from %s@%s)' % (fpath, frev)

            p = ' %s %s%s\n' % (action, path, frominfo)

            fp.write(p.encode('utf-8'))

if __name__ == '__main__':

    data = sys.stdin.read()

    entries = parselog(data)

    printentries(entries)