more general module loading; do not use __dict__ directly

[mass-build.git] / vcs.py

diff --git a/vcs.py b/vcs.py
index 994f03b6edbb5cf03cd7cdb14704781eba81d514..5e481dea4b86439a7dd8ed71c29af2fc9ee75d1e 100644 (file)
--- a/vcs.py
+++ b/vcs.py
@@ -1,20 +1,52 @@
-import os, git, subprocess
+# mass-build - Easily Build Software Involving a Large Amount of Source Repositories
+# Copyright (C) 2012-2013 Ralf Jung <post@ralfj.de>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

 
 

-'''A VCS must have an "update" method with an optional "force" parameter.'''
+import os, subprocess, re
+
+'''A VCS must have an "update" method with an optional "mode" parameter taking one of the three values below,
+   a "version" method returning a version name (or None),
+   and a "newVersions" method which checks for new versions and prints the result to standard output.'''
+MODE_FETCH = 0
+MODE_REBASE = 1
+MODE_RESET = 2
+
+def natural_sort_key(val):
+       return [ (int(c) if c.isdigit() else c) for c in re.split('([0-9]+)', val) ]
+
+def get_non_digit_prefix(val):
+       return re.match('[^0-9]*', val).group(0)
+
+class GitCommand:
+       def __getattr__(self, name):
+               def call(*args, get_stderr = False):
+                       cmd = ["git", name.replace('_', '-')] + list(args)
+                       output = subprocess.check_output(cmd, stderr=subprocess.STDOUT if get_stderr else None)
+                       return output.decode('utf-8').strip('\n')
+               return call
+git = GitCommand()

 
 # Fetch updates from git
 class Git:
 
 # Fetch updates from git
 class Git:

-       def __init__(self, folder, url, commit):
+       def __init__(self, folder, config):

                self.folder = os.path.abspath(folder)
                self.folder = os.path.abspath(folder)

-               self.url = url
-               self.commit = commit
-       
-       class _ProgressPrinter(git.remote.RemoteProgress):
-               def update(self, op_code, cur_count, max_count=None, message=''):
-                       print self._cur_line+(" "*30)+"\r",
-       
-       def update(self):
-               print "Updating",self.folder
+               self.url = config['url']
+               self.commit = config['version']
+
+       def update(self, mode = MODE_REBASE):

                isBranch = (self.commit.startswith('origin/'))
                if isBranch:
                        branchname = self.commit[len('origin/'):]
                isBranch = (self.commit.startswith('origin/'))
                if isBranch:
                        branchname = self.commit[len('origin/'):]


@@ -23,40 +55,69 @@ class Git:
                # get us a git repository, and the "origin" remote
                if os.path.exists(self.folder):
                        # load existing repo
                # get us a git repository, and the "origin" remote
                if os.path.exists(self.folder):
                        # load existing repo

-                       repo = git.Repo(self.folder)
-                       origin = repo.remotes.origin
+                       os.chdir(self.folder)
+                       git.remote("set-url", "origin", self.url) # make sure we use the current URL

                else:
                        # create a new one
                        os.makedirs(self.folder)
                else:
                        # create a new one
                        os.makedirs(self.folder)

-                       repo = git.Repo.init(self.folder)
-                       origin = repo.create_remote('origin', self.url)
-               origin.fetch(progress=Git._ProgressPrinter()) # download new data
-               print " "*80+"\r", # clean the line we are in
+                       os.chdir(self.folder)
+                       git.init()
+                       git.remote("add", "origin", self.url)
+               git.fetch("origin")
+               if mode == MODE_FETCH:
+                       return

                # create/find correct branch
                # create/find correct branch

-               if branchname in repo.heads:
-                       branch = repo.heads[branchname]
-               else:
-                       branch = repo.create_head(branchname, self.commit)
-                       if isBranch:
-                               branch.set_tracking_branch(origin.refs[branchname])
+               if not git.branch("--list", branchname): # the branch does not yet exit
+                       git.branch(branchname, self.commit)
+                       if isBranch: # make sure we track the correct remote branch
+                               git.branch("-u", self.commit, branchname)

                # update it to the latest remote commit
                # update it to the latest remote commit

-               branch.checkout()
-               repo.git.rebase(self.commit)
-               print "...done",
-               if repo.head.reference.commit != repo.refs[self.commit].commit:
-                       print "(keeping local patches around)",
-               print
+               git.checkout(branchname, get_stderr=True)
+               if mode == MODE_RESET:
+                       git.reset("--hard", self.commit)
+               else:
+                       git.rebase(self.commit)
+               # update submodules
+               git.submodule("update", "--init", "--recursive", "--rebase")
+               # done
+               print("...done", end=' ')
+               if git.rev_parse("HEAD") != git.rev_parse(self.commit):
+                       print("(keeping local patches around)", end=' ')
+               print()
+
+       def version(self):
+               v = git.describe()
+               return v[len(get_non_digit_prefix(v)):] # remove the non-digit prefix from v (so that it starts with a number)
+
+       def checkVersions(self):
+               self.update(mode = MODE_FETCH)
+               currentVersion = git.describe()
+               # get sorted list of tag names with the same non-digit prefix and higher version number
+               tags = git.tag().split('\n')
+               tags = [t for t in tags if get_non_digit_prefix(t) == get_non_digit_prefix(currentVersion) and natural_sort_key(t) > natural_sort_key(currentVersion)]
+               if not tags: return
+               tags.sort(key = natural_sort_key)
+               print("Versions newer than "+currentVersion+" available:")
+               print(tags)

 
 # Fetch updates via SVN
 class SVN:
 
 # Fetch updates via SVN
 class SVN:

-       def __init__(self, folder, svnPath):
+       def __init__(self, folder, url):

                self.folder = os.path.abspath(folder)
                self.folder = os.path.abspath(folder)

-               self.svnPath = svnPath
-       
-       def update(self):
-               print "Updating",self.folder
+               self.url = url
+
+       def update(self, mode = MODE_REBASE):
+               if mode == MODE_FETCH: raise Exception("Just fetching is not supported with SVN")

                if os.path.exists(self.folder):
                        os.chdir(self.folder) # go into repository
                if os.path.exists(self.folder):
                        os.chdir(self.folder) # go into repository

-                       subprocess.check_call(['svn', 'switch', self.svnPath]) # and update to the URL we got
+                       if mode == MODE_RESET: subprocess.check_call(['svn', 'revert', '-R', '.'])
+                       subprocess.check_call(['svn', 'switch', self.url]) # and update to the URL we got

                else:
                else:

-                       subprocess.check_call(['svn', 'co', self.svnPath, self.folder])# just download it
+                       os.makedirs(self.folder) # if even the parent folder does not exist, svn fails
+                       subprocess.check_call(['svn', 'co', self.url, self.folder]) # just download it
+       
+       def version(self):
+               return None
+       
+       def checkVersions(self):
+               print("Version checking not supporting with SVN")