Mercurial > hgsubversion
view svnwrap/svn_swig_wrapper.py @ 74:450d5d9d3b80
SubversionRepo: do not use temporary file in get_file()
Existing code says swig bindings do not support StringIO objects as output for
svn.ra.get_file(). This issue was never reported in the convert extension.
author | Patrick Mezard <pmezard@gmail.com> |
---|---|
date | Sun, 09 Nov 2008 18:08:35 -0600 |
parents | 49b7cbe4c8e3 |
children | cca31b6b1318 |
line wrap: on
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import cStringIO import getpass import os import shutil import sys import tempfile import hashlib from svn import client from svn import core from svn import delta from svn import ra if (core.SVN_VER_MAJOR, core.SVN_VER_MINOR, core.SVN_VER_MICRO) < (1, 5, 0): #pragma: no cover raise ImportError, 'You must have Subversion 1.5.0 or newer and matching SWIG bindings.' svn_config = core.svn_config_get_config(None) class RaCallbacks(ra.Callbacks): def open_tmp_file(self, pool): #pragma: no cover (fd, fn) = tempfile.mkstemp() os.close(fd) return fn def get_client_string(self, pool): return 'hgsubversion' def user_pass_prompt(realm, default_username, ms, pool): #pragma: no cover creds = core.svn_auth_cred_simple_t() creds.may_save = ms if default_username: sys.stderr.write('Auth realm: %s\n' % (realm,)) creds.username = default_username else: sys.stderr.write('Auth realm: %s\n' % (realm,)) sys.stderr.write('Username: ') sys.stderr.flush() creds.username = sys.stdin.readline().strip() creds.password = getpass.getpass('Password for %s: ' % creds.username) return creds def _create_auth_baton(pool): """Create a Subversion authentication baton. """ # Give the client context baton a suite of authentication # providers.h providers = [ client.get_simple_provider(), client.get_username_provider(), client.get_ssl_client_cert_file_provider(), client.get_ssl_client_cert_pw_file_provider(), client.get_ssl_server_trust_file_provider(), ] # Platform-dependant authentication methods if hasattr(client, 'get_windows_simple_provider'): #pragma: no cover try: providers.append(client.get_windows_simple_provider()) except: pass if hasattr(client, 'get_keychain_simple_provider'): #pragma: no cover try: providers.append(client.get_keychain_simple_provider()) except: pass providers.extend([client.get_simple_prompt_provider(user_pass_prompt, 2), ]) return core.svn_auth_open(providers, pool) class Revision(object): """Wrapper for a Subversion revision. """ def __init__(self, revnum, author, message, date, paths, strip_path=''): self.revnum, self.author, self.message = revnum, author, message # TODO parse this into a datetime self.date = date self.paths = {} if paths: for p in paths: self.paths[p[len(strip_path):]] = paths[p] def __str__(self): return 'r%d by %s' % (self.revnum, self.author) class SubversionRepo(object): """Wrapper for a Subversion repository. This uses the SWIG Python bindings, and will only work on svn >= 1.4. It takes a required param, the URL. """ def __init__(self, url='', username=''): self.svn_url = url self.uname = username self.auth_baton_pool = core.Pool() self.auth_baton = _create_auth_baton(self.auth_baton_pool) self.init_ra_and_client() self.uuid = ra.get_uuid(self.ra, self.pool) repo_root = ra.get_repos_root(self.ra, self.pool) # *will* have a leading '/', would not if we used get_repos_root2 self.subdir = url[len(repo_root):] if not self.subdir or self.subdir[-1] != '/': self.subdir += '/' def init_ra_and_client(self): """Initializes the RA and client layers, because sometimes getting unified diffs runs the remote server out of open files. """ # while we're in here we'll recreate our pool self.pool = core.Pool() self.client_context = client.create_context() core.svn_auth_set_parameter(self.auth_baton, core.SVN_AUTH_PARAM_DEFAULT_USERNAME, self.uname) self.client_context.auth_baton = self.auth_baton self.client_context.config = svn_config callbacks = RaCallbacks() callbacks.auth_baton = self.auth_baton self.callbacks = callbacks self.ra = ra.open2(self.svn_url.encode('utf-8'), callbacks, svn_config, self.pool) @property def HEAD(self): return ra.get_latest_revnum(self.ra, self.pool) @property def START(self): return 0 @property def branches(self): """Get the branches defined in this repo assuming a standard layout. """ branches = self.list_dir('branches').keys() branch_info = {} head=self.HEAD for b in branches: b_path = 'branches/%s' %b hist_gen = self.fetch_history_at_paths([b_path], stop=head) hist = hist_gen.next() source, source_rev = self._get_copy_source(b_path, cached_head=head) # This if statement guards against projects that have non-ancestral # branches by not listing them has branches # Note that they probably are really ancestrally related, but there # is just no way for us to know how. if source is not None and source_rev is not None: branch_info[b] = (source, source_rev, hist.revnum) return branch_info @property def tags(self): """Get the current tags in this repo assuming a standard layout. This returns a dictionary of tag: (source path, source rev) """ tags = self.list_dir('tags').keys() tag_info = {} head = self.HEAD for t in tags: tag_info[t] = self._get_copy_source('tags/%s' % t, cached_head=head) return tag_info def _get_copy_source(self, path, cached_head=None): """Get copy revision for the given path, assuming it was meant to be a copy of the entire tree. """ if not cached_head: cached_head = self.HEAD hist_gen = self.fetch_history_at_paths([path], stop=cached_head) hist = hist_gen.next() if hist.paths[path].copyfrom_path is None: return None, None source = hist.paths[path].copyfrom_path source_rev = 0 for p in hist.paths: if hist.paths[p].copyfrom_rev: # We assume that the revision of the source tree as it was # copied was actually the revision of the highest revision # copied item. This could be wrong, but in practice it will # *probably* be correct if source_rev < hist.paths[p].copyfrom_rev: source_rev = hist.paths[p].copyfrom_rev source = source[len(self.subdir):] return source, source_rev def list_dir(self, dir, revision=None): """List the contents of a server-side directory. Returns a dict-like object with one dict key per directory entry. Args: dir: the directory to list, no leading slash rev: the revision at which to list the directory, defaults to HEAD """ if dir[-1] == '/': dir = dir[:-1] if revision is None: revision = self.HEAD r = ra.get_dir2(self.ra, dir, revision, core.SVN_DIRENT_KIND, self.pool) folders, props, junk = r return folders def revisions(self, start=None, chunk_size=1000): """Load the history of this repo. This is LAZY. It returns a generator, and fetches a small number of revisions at a time. The reason this is lazy is so that you can use the same repo object to perform RA calls to get deltas. """ # NB: you'd think this would work, but you'd be wrong. I'm pretty # convinced there must be some kind of svn bug here. #return self.fetch_history_at_paths(['tags', 'trunk', 'branches'], # start=start) # this does the same thing, but at the repo root + filtering. It's # kind of tough cookies, sadly. for r in self.fetch_history_at_paths([''], start=start, chunk_size=chunk_size): should_yield = False i = 0 paths = list(r.paths.keys()) while i < len(paths) and not should_yield: p = paths[i] if (p.startswith('trunk') or p.startswith('tags') or p.startswith('branches')): should_yield = True i += 1 if should_yield: yield r def fetch_history_at_paths(self, paths, start=None, stop=None, chunk_size=1000): revisions = [] def callback(paths, revnum, author, date, message, pool): r = Revision(revnum, author, message, date, paths, strip_path=self.subdir) revisions.append(r) if not start: start = self.START if not stop: stop = self.HEAD while stop > start: ra.get_log(self.ra, paths, start+1, stop, chunk_size, #limit of how many log messages to load True, # don't need to know changed paths True, # stop on copies callback, self.pool) if len(revisions) < chunk_size: # this means there was no history for the path, so force the # loop to exit start = stop else: start = revisions[-1].revnum while len(revisions) > 0: yield revisions[0] revisions.pop(0) def commit(self, paths, message, file_data, base_revision, dirs, properties, copies): """Commits the appropriate targets from revision in editor's store. """ self.init_ra_and_client() commit_info = [] def commit_cb(_commit_info, pool): commit_info.append(_commit_info) editor, edit_baton = ra.get_commit_editor2(self.ra, message, commit_cb, None, False, self.pool) checksum = [] # internal dir batons can fall out of scope and get GCed before svn is # done with them. This prevents that (credit to gvn for the idea). batons = [edit_baton, ] def driver_cb(parent, path, pool): if not parent: bat = editor.open_root(edit_baton, base_revision, self.pool) batons.append(bat) return bat if path in dirs: bat = editor.add_directory(path, parent, None, -1, pool) batons.append(bat) return bat base_text, new_text, action = file_data[path] compute_delta = True if action == 'modify': baton = editor.open_file(path, parent, base_revision, pool) elif action == 'add': try: frompath, fromrev = copies.get(path, (None, -1)) if frompath: frompath = self.svn_url + '/' + frompath baton = editor.add_file(path, parent, frompath, fromrev, pool) except (core.SubversionException, TypeError), e: #pragma: no cover print e.message raise elif action == 'delete': baton = editor.delete_entry(path, base_revision, parent, pool) compute_delta = False if path in properties: if properties[path].get('svn:special', None): new_text = 'link %s' % new_text for p, v in properties[path].iteritems(): editor.change_file_prop(baton, p, v) if compute_delta: handler, wh_baton = editor.apply_textdelta(baton, None, self.pool) txdelta_stream = delta.svn_txdelta( cStringIO.StringIO(base_text), cStringIO.StringIO(new_text), self.pool) delta.svn_txdelta_send_txstream(txdelta_stream, handler, wh_baton, pool) # TODO pass md5(new_text) instead of None editor.close_file(baton, None, pool) delta.path_driver(editor, edit_baton, base_revision, paths, driver_cb, self.pool) editor.close_edit(edit_baton, self.pool) def get_replay(self, revision, editor, oldest_rev_i_have=0): # this method has a tendency to chew through RAM if you don't re-init self.init_ra_and_client() e_ptr, e_baton = delta.make_editor(editor) try: ra.replay(self.ra, revision, oldest_rev_i_have, True, e_ptr, e_baton, self.pool) except core.SubversionException, e: #pragma: no cover # can I depend on this number being constant? if (e.message == "Server doesn't support the replay command" or e.apr_err == 170003 or e.message == 'The requested report is unknown.' or e.apr_err == 200007): raise SubversionRepoCanNotReplay, ('This Subversion server ' 'is older than 1.4.0, and cannot satisfy replay requests.') else: raise def get_unified_diff(self, path, revision, other_path=None, other_rev=None, deleted=True, ignore_type=False): """Gets a unidiff of path at revision against revision-1. """ # works around an svn server keeping too many open files (observed # in an svnserve from the 1.2 era) self.init_ra_and_client() old_cwd = os.getcwd() assert path[0] != '/' url = self.svn_url + '/' + path url2 = url if other_path is not None: url2 = self.svn_url + '/' + other_path if other_rev is None: other_rev = revision - 1 tmpdir = tempfile.mkdtemp('svnwrap_temp') try: # hot tip: the swig bridge doesn't like StringIO for these bad boys out_path = os.path.join(tmpdir, 'diffout') error_path = os.path.join(tmpdir, 'differr') out = open(out_path, 'w') err = open(error_path, 'w') rev_old = core.svn_opt_revision_t() rev_old.kind = core.svn_opt_revision_number rev_old.value.number = other_rev rev_new = core.svn_opt_revision_t() rev_new.kind = core.svn_opt_revision_number rev_new.value.number = revision client.diff3([], url2, rev_old, url, rev_new, True, True, deleted, ignore_type, 'UTF-8', out, err, self.client_context, self.pool) out.close() err.close() assert len(open(error_path).read()) == 0 diff = open(out_path).read() os.chdir(old_cwd) return diff finally: shutil.rmtree(tmpdir) def get_file(self, path, revision): out = cStringIO.StringIO() try: ra.get_file(self.ra, path, revision, out) except core.SubversionException, e: notfound = (core.SVN_ERR_FS_NOT_FOUND, core.SVN_ERR_RA_DAV_PATH_NOT_FOUND) if e.apr_err in notfound: # File not found raise IOError() raise data = out.getvalue() return data def proplist(self, path, revision, recurse=False): rev = core.svn_opt_revision_t() rev.kind = core.svn_opt_revision_number rev.value.number = revision if path[-1] == '/': path = path[:-1] if path[0] == '/': path = path[1:] pl = dict(client.proplist2(self.svn_url+'/'+path, rev, rev, True, self.client_context, self.pool)) pl2 = {} for key, value in pl.iteritems(): pl2[key[len(self.svn_url)+1:]] = value return pl2 def fetch_all_files_to_dir(self, path, revision, checkout_path): rev = core.svn_opt_revision_t() rev.kind = core.svn_opt_revision_number rev.value.number = revision client.export3(self.svn_url+'/'+path, checkout_path, rev, rev, True, True, True, 'LF', # should be 'CRLF' on win32 self.client_context, self.pool) class SubversionRepoCanNotReplay(Exception): """Exception raised when the svn server is too old to have replay. """