svn2changelog

#!/usr/bin/python
# -*- coding: utf-8 -*-
#
# Simple parser to convert svn log to a ChangeLog file
#
# Copyright 2009, Onur Küçük <onur@pardus.org.tr>
#

import sys
import urllib2
import subprocess

# write where your accounts file is
accountsFile = "http://svn.pardus.org.tr/uludag/trunk/common/accounts"


def loadFile(_file):
    try:
       f = file(_file)
       data = f.read()
       f.close()
    except IOError:
        print " !!! Failed to open %s !!!" % _file
        sys.exit(1)

    return data.split("\n")

def getSvnLog(svnargs=""):
    try:
        a = subprocess.Popen("svn log %s" % svnargs, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)

        if a.wait() > 0:
            print "Error from Subversion !"
            print a.communicate()[1]
            sys.exit(1)
        else:
            return a.communicate()[0].split("\n")

    except OSError, e:
        print " !!! Error running svn command !!!"
        print e
        sys.exit(1)

def parseAccounts():
    acc = {}
    data = urllib2.urlopen(accountsFile).read().strip().split("\n")
    data = filter(lambda x: not (x.startswith("#") or x == ""), data)

    for i in data:
        nick, realName, email = i.split(":")[0:3]
        acc[nick] = [realName, email]

    return acc

def parseHeader(_data):
    changedate = None
    changer = None

    if " | " in _data:
        changearray = _data.split(" | ")
        changer = changearray[1]
        changedate = changearray[2].split(" ")[0]

    return changedate, changer

def parseSections(_data):
    sections = {}
    currentsection = ""
    getsection = False
    emptyline = False

    for line in _data:
        if line == "-" * 72:
            # start of a new section found"
            getsection = True
            continue

        elif getsection:
            # header found"
            date, owner = parseHeader(line)

            if owner:
                try:
                    svnname, svnmail = svnaccount[owner]
                except KeyError:
                    svnname, svnmail = owner, "nomail"

                currentsection = "%s %s <%s>" % (date, svnname, svnmail)

                if not currentsection in sections:
                    sections[currentsection] = ""

                getsection = False

            else:
                # EOF
                break
        else:
            # starting raw data"
            if line.strip() == "":
                emptyline = True
            else:
                if emptyline:
                    sections[currentsection] += "        * %s\n" % line.lstrip()
                    emptyline = False
                else:
                    sections[currentsection] += "          %s\n" % line.lstrip()

    return sections

def printHistory(data):
    timeline = data.keys()
    timeline.sort(reverse=True)

    for i in timeline:
        print i
        print data[i]

def usage():
    prg = sys.argv[0]

    print "Simple svn to ChangeLog parser"
    print ""
    print "%s [fromfile <svnlogfile>] [SVN OPTIONS]" % prg
    print ""

if __name__ == "__main__":
    logFile = ""
    svnargs = ""

    if "usage" in sys.argv or "help" in sys.argv:
        usage()
        sys.exit(0)
    elif len(sys.argv) > 2 and sys.argv[1] == "fromfile":
        logFile = sys.argv[2]
    else:
        if len(sys.argv) > 1:
            for i in sys.argv[1:]:
                svnargs += "%s " % i

    if logFile:
        allData = loadFile(logFile)
    else:
        allData = getSvnLog(svnargs)

    svnaccount = parseAccounts()
    history = parseSections(allData)
    printHistory(history)