hg2git.py

   1 #!/usr/bin/env python
   2
   3 # Copyright (c) 2007, 2008 Rocco Rutte <pdmef@gmx.net> and others.
   4 # License: MIT <http://www.opensource.org/licenses/mit-license.php>
   5
   6 from mercurial import hg,util,ui,templatefilters
   7 import re
   8 import os
   9 import sys
  10 import subprocess
  11
  12 # default git branch name
  13 cfg_master='master'
  14 # default origin name
  15 origin_name=''
  16 # silly regex to see if user field has email address
  17 user_re=re.compile('([^<]+) (<[^>]*>)$')
  18 # silly regex to clean out user names
  19 user_clean_re=re.compile('^["]([^"]+)["]$')
  20
  21 def set_default_branch(name):
  22   global cfg_master
  23   cfg_master = name
  24
  25 def set_origin_name(name):
  26   global origin_name
  27   origin_name = name
  28
  29 def setup_repo(url):
  30   try:
  31     myui=ui.ui(interactive=False)
  32   except TypeError:
  33     myui=ui.ui()
  34     myui.setconfig('ui', 'interactive', 'off')
  35   return myui,hg.repository(myui,url)
  36
  37 def fixup_user(user,authors):
  38   user=user.strip("\"")
  39   if authors!=None:
  40     # if we have an authors table, try to get mapping
  41     # by defaulting to the current value of 'user'
  42     user=authors.get(user,user)
  43   name,mail,m='','',user_re.match(user)
  44   if m==None:
  45     # if we don't have 'Name <mail>' syntax, extract name
  46     # and mail from hg helpers. this seems to work pretty well.
  47     # if email doesn't contain @, replace it with devnull@localhost
  48     name=templatefilters.person(user)
  49     mail='<%s>' % util.email(user)
  50     if '@' not in mail:
  51       mail = '<devnull@localhost>'
  52   else:
  53     # if we have 'Name <mail>' syntax, everything is fine :)
  54     name,mail=m.group(1),m.group(2)
  55
  56   # remove any silly quoting from username
  57   m2=user_clean_re.match(name)
  58   if m2!=None:
  59     name=m2.group(1)
  60   return '%s %s' % (name,mail)
  61
  62 def get_branch(name):
  63   # 'HEAD' is the result of a bug in mutt's cvs->hg conversion,
  64   # other CVS imports may need it, too
  65   if name=='HEAD' or name=='default' or name=='':
  66     name=cfg_master
  67   if origin_name:
  68     return origin_name + '/' + name
  69   return name
  70
  71 def get_changeset(ui,repo,revision,authors={},encoding=''):
  72   node=repo.lookup(revision)
  73   (manifest,user,(time,timezone),files,desc,extra)=repo.changelog.read(node)
  74   if encoding:
  75     user=user.decode(encoding).encode('utf8')
  76     desc=desc.decode(encoding).encode('utf8')
  77   tz="%+03d%02d" % (-timezone / 3600, ((-timezone % 3600) / 60))
  78   branch=get_branch(extra.get('branch','master'))
  79   return (node,manifest,fixup_user(user,authors),(time,tz),files,desc,branch,extra)
  80
  81 def mangle_key(key):
  82   return key
  83
  84 def load_cache(filename,get_key=mangle_key):
  85   cache={}
  86   if not os.path.exists(filename):
  87     return cache
  88   f=open(filename,'r')
  89   l=0
  90   for line in f.readlines():
  91     l+=1
  92     fields=line.split(' ')
  93     if fields==None or not len(fields)==2 or fields[0][0]!=':':
  94       sys.stderr.write('Invalid file format in [%s], line %d\n' % (filename,l))
  95       continue
  96     # put key:value in cache, key without ^:
  97     cache[get_key(fields[0][1:])]=fields[1].split('\n')[0]
  98   f.close()
  99   return cache
 100
 101 def save_cache(filename,cache):
 102   f=open(filename,'w+')
 103   map(lambda x: f.write(':%s %s\n' % (str(x),str(cache.get(x)))),cache.keys())
 104   f.close()
 105
 106 def get_git_sha1(name,type='heads'):
 107   try:
 108     # use git-rev-parse to support packed refs
 109     ref="refs/%s/%s" % (type,name)
 110     l=subprocess.check_output(["git", "rev-parse", "--verify", "--quiet", ref])
 111     if l == None or len(l) == 0:
 112       return None
 113     return l[0:40]
 114   except subprocess.CalledProcessError:
 115     return None