vcs.py

   1 import os, git, subprocess
   2
   3 '''A VCS must have an "update" method with an optional "forceVersion" parameter, and optionally a "version" method.'''
   4
   5 # Fetch updates from git
   6 class Git:
   7         def __init__(self, folder, url, commit):
   8                 self.folder = os.path.abspath(folder)
   9                 self.url = url
  10                 self.commit = commit
  11
  12         class _ProgressPrinter(git.remote.RemoteProgress):
  13                 def update(self, op_code, cur_count, max_count=None, message=''):
  14                         print self._cur_line+(" "*30)+"\r",
  15
  16         def update(self, forceVersion=False):
  17                 isBranch = (self.commit.startswith('origin/'))
  18                 if isBranch:
  19                         branchname = self.commit[len('origin/'):]
  20                 else:
  21                         branchname = "tag"
  22                 # get us a git repository, and the "origin" remote
  23                 if os.path.exists(self.folder):
  24                         # load existing repo
  25                         repo = git.Repo(self.folder)
  26                         origin = repo.remotes.origin
  27                         origin.config_writer.set_value("url", self.url) # make sure we use the current URL
  28                 else:
  29                         # create a new one
  30                         os.makedirs(self.folder)
  31                         repo = git.Repo.init(self.folder)
  32                         origin = repo.create_remote('origin', self.url)
  33                 origin.fetch(progress=Git._ProgressPrinter()) # download new data
  34                 print " "*80+"\r", # clean the line we are in
  35                 # create/find correct branch
  36                 if branchname in repo.heads:
  37                         branch = repo.heads[branchname]
  38                 else:
  39                         branch = repo.create_head(branchname, self.commit)
  40                         if isBranch: # track remote branch
  41                                 branch.set_tracking_branch(origin.refs[branchname])
  42                 # update it to the latest remote commit
  43                 branch.checkout()
  44                 if forceVersion:
  45                         repo.head.reset(self.commit, working_tree=True)
  46                 else:
  47                         repo.git.rebase(self.commit)
  48                 # update submodules
  49                 repo.git.submodule("update", "--init", "--recursive", "--rebase")
  50                 # done
  51                 print "...done",
  52                 if repo.head.reference.commit != repo.commit(self.commit):
  53                         print "(keeping local patches around)",
  54                 print
  55
  56         def version(self):
  57                 repo = git.Repo(self.folder)
  58                 v = repo.git.describe()
  59                 if v.startswith('v'): v = v[1:]
  60                 return v
  61
  62 # Fetch updates via SVN
  63 class SVN:
  64         def __init__(self, folder, url):
  65                 self.folder = os.path.abspath(folder)
  66                 self.url = url
  67
  68         def update(self, forceVersion=False):
  69                 if os.path.exists(self.folder):
  70                         os.chdir(self.folder) # go into repository
  71                         if forceVersion: subprocess.check_call(['svn', 'revert', '-R', '.'])
  72                         subprocess.check_call(['svn', 'switch', self.url]) # and update to the URL we got
  73                 else:
  74                         os.makedirs(self.folder) # if even the parent folder does not exist, svn fails
  75                         subprocess.check_call(['svn', 'co', self.url, self.folder]) # just download it