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#!/usr/bin/python
# -*- coding: utf-8 -*-
import os
import tempfile
import thread
import re
import werkzeug
import datetime
import errno
# Note: we have to set these before importing Mercurial
os.environ['HGENCODING'] = 'utf-8'
os.environ['HGMERGE'] = "internal:merge"
import mercurial.hg
import mercurial.ui
import mercurial.revlog
import mercurial.util
import mercurial.hgweb
import mercurial.commands
import mercurial.merge
import error
import page
def locked_repo(func):
"""A decorator for locking the repository when calling a method."""
def new_func(self, *args, **kwargs):
"""Wrap the original function in locks."""
wlock = self.repo.wlock()
lock = self.repo.lock()
try:
func(self, *args, **kwargs)
finally:
lock.release()
wlock.release()
return new_func
def _find_repo_path(path):
"""Go up the directory tree looking for a repository."""
while not os.path.isdir(os.path.join(path, ".hg")):
old_path, path = path, os.path.dirname(path)
if path == old_path:
return None
return path
def _get_ui():
try:
ui = mercurial.ui.ui(report_untrusted=False,
interactive=False, quiet=True)
except TypeError:
# Mercurial 1.3 changed the way we setup the ui object.
ui = mercurial.ui.ui()
ui.quiet = True
ui._report_untrusted = False
ui.setconfig('ui', 'interactive', False)
return ui
class WikiStorage(object):
"""
Provides means of storing wiki pages and keeping track of their
change history, using Mercurial repository as the storage method.
"""
def __init__(self, path, charset=None, _=lambda x: x, unix_eol=False,
extension=None):
"""
Takes the path to the directory where the pages are to be kept.
If the directory doesn't exist, it will be created. If it's inside
a Mercurial repository, that repository will be used, otherwise
a new repository will be created in it.
"""
self._ = _
self.charset = charset or 'utf-8'
self.unix_eol = unix_eol
self.extension = extension
self.path = os.path.abspath(path)
if not os.path.exists(self.path):
os.makedirs(self.path)
self.ui = _get_ui()
self.repo_path = _find_repo_path(self.path)
if self.repo_path is None:
# Create the repository if needed.
self.repo_path = self.path
mercurial.hg.repository(self.ui, self.repo_path, create=True)
self.repo_prefix = self.path[len(self.repo_path):].strip('/')
self._repos = {}
def reopen(self):
"""Close and reopen the repo, to make sure we are up to date."""
self._repos = {}
@property
def repo(self):
"""Keep one open repository per thread."""
thread_id = thread.get_ident()
try:
return self._repos[thread_id]
except KeyError:
repo = mercurial.hg.repository(self.ui, self.repo_path)
self._repos[thread_id] = repo
return repo
def _check_path(self, path):
"""
Ensure that the path is within allowed bounds.
"""
_ = self._
abspath = os.path.abspath(path)
if os.path.islink(path) or os.path.isdir(path):
raise error.ForbiddenErr(
_(u"Can't use symbolic links or directories as pages"))
if not abspath.startswith(self.path):
raise error.ForbiddenErr(
_(u"Can't read or write outside of the pages repository"))
def _file_path(self, title):
return os.path.join(self.repo_path, self._title_to_file(title))
def _title_to_file(self, title):
title = unicode(title).strip()
filename = werkzeug.url_quote(title, safe='')
# Escape special windows filenames and dot files
_windows_device_files = ('CON', 'AUX', 'COM1', 'COM2', 'COM3',
'COM4', 'LPT1', 'LPT2', 'LPT3', 'PRN',
'NUL')
if (filename.split('.')[0].upper() in _windows_device_files or
filename.startswith('_') or filename.startswith('.')):
filename = '_' + filename
if page.page_mime(title) == 'text/x-wiki' and self.extension:
filename += self.extension
return os.path.join(self.repo_prefix, filename)
def _file_to_title(self, filepath):
_ = self._
if not filepath.startswith(self.repo_prefix):
raise error.ForbiddenErr(
_(u"Can't read or write outside of the pages repository"))
name = filepath[len(self.repo_prefix):].strip('/')
# Un-escape special windows filenames and dot files
if name.startswith('_') and len(name) > 1:
name = name[1:]
if self.extension and name.endswith(self.extension):
name = name[:-len(self.extension)]
return werkzeug.url_unquote(name)
def __contains__(self, title):
if title:
file_path = self._file_path(title)
return os.path.isfile(file_path) and not os.path.islink(file_path)
def __iter__(self):
return self.all_pages()
def merge_changes(self, changectx, repo_file, text, user, parent):
"""Commits and merges conflicting changes in the repository."""
_ = self._
tip_node = changectx.node()
filectx = changectx[repo_file].filectx(parent)
parent_node = filectx.changectx().node()
self.repo.dirstate.setparents(parent_node)
node = self._commit([repo_file], text, user)
partial = lambda filename: repo_file == filename
try:
mercurial.merge.update(self.repo, tip_node, True, True, partial)
msg = _(u'merge of edit conflict')
except mercurial.util.Abort:
msg = _(u'failed merge of edit conflict')
self.repo.dirstate.setparents(tip_node, node)
# Mercurial 1.1 and later need updating the merge state
try:
mergestate = mercurial.merge.mergestate
except AttributeError:
pass
else:
state = mergestate(self.repo)
try:
state.mark(repo_file, "r")
except KeyError:
# There were no conflicts to mark
pass
else:
# Mercurial 1.7+ needs a commit
try:
commit = state.commit
except AttributeError:
pass
else:
commit()
return msg
@locked_repo
def save_file(self, title, file_name, author=u'', comment=u'',
parent=None):
"""Save an existing file as specified page."""
_ = self._
user = author.encode('utf-8') or _(u'anon').encode('utf-8')
text = comment.encode('utf-8') or _(u'comment').encode('utf-8')
repo_file = self._title_to_file(title)
file_path = self._file_path(title)
self._check_path(file_path)
try:
mercurial.util.rename(file_name, file_path)
except OSError, e:
if e.errno == errno.ENAMETOOLONG:
# "File name too long"
raise error.RequestURITooLarge()
else:
raise
changectx = self._changectx()
try:
# Mercurial 1.5 and earlier have .add() on the repo
add = self.repo.add
except AttributeError:
# Mercurial 1.6
add = self.repo[None].add
try:
filectx_tip = changectx[repo_file]
current_page_rev = filectx_tip.filerev()
except mercurial.revlog.LookupError:
add([repo_file])
current_page_rev = -1
if parent is not None and current_page_rev != parent:
msg = self.merge_changes(changectx, repo_file, text, user, parent)
user = '<wiki>'
text = msg.encode('utf-8')
self._commit([repo_file], text, user)
def _commit(self, files, text, user):
try:
return self.repo.commit(files=files, text=text, user=user,
force=True, empty_ok=True)
except TypeError:
# Mercurial 1.3 doesn't accept empty_ok or files parameter
match = mercurial.match.exact(self.repo_path, '', list(files))
return self.repo.commit(match=match, text=text, user=user,
force=True)
def save_data(self, title, data, author=u'', comment=u'', parent=None):
"""Save data as specified page."""
try:
temp_path = tempfile.mkdtemp(dir=self.path)
file_path = os.path.join(temp_path, 'saved')
f = open(file_path, "wb")
f.write(data)
f.close()
self.save_file(title, file_path, author, comment, parent)
finally:
try:
os.unlink(file_path)
except OSError:
pass
try:
os.rmdir(temp_path)
except OSError:
pass
def save_text(self, title, text, author=u'', comment=u'', parent=None):
"""Save text as specified page, encoded to charset."""
data = text.encode(self.charset)
if self.unix_eol:
data = data.replace('\r\n', '\n')
self.save_data(title, data, author, comment, parent)
def page_text(self, title):
"""Read unicode text of a page."""
data = self.open_page(title).read()
text = unicode(data, self.charset, 'replace')
return text
def page_lines(self, page):
for data in page.xreadlines():
yield unicode(data, self.charset, 'replace')
@locked_repo
def delete_page(self, title, author=u'', comment=u''):
user = author.encode('utf-8') or 'anon'
text = comment.encode('utf-8') or 'deleted'
repo_file = self._title_to_file(title)
file_path = self._file_path(title)
self._check_path(file_path)
try:
# Mercurial 1.5 and earlier have .remove() on the repo
remove = self.repo.remove
except AttributeError:
# Mercurial 1.6
remove = self.repo[None].remove
try:
os.unlink(file_path)
except OSError:
pass
remove([repo_file])
self._commit([repo_file], text, user)
def open_page(self, title):
"""Open the page and return a file-like object with its contents."""
file_path = self._file_path(title)
self._check_path(file_path)
try:
return open(file_path, "rb")
except IOError:
raise error.NotFoundErr()
def page_file_meta(self, title):
"""Get page's inode number, size and last modification time."""
try:
(st_mode, st_ino, st_dev, st_nlink, st_uid, st_gid, st_size,
st_atime, st_mtime, st_ctime) = os.stat(self._file_path(title))
except OSError:
return 0, 0, 0
return st_ino, st_size, st_mtime
def page_meta(self, title):
"""Get page's revision, date, last editor and his edit comment."""
filectx_tip = self._find_filectx(title)
if filectx_tip is None:
raise error.NotFoundErr()
#return -1, None, u'', u''
rev = filectx_tip.filerev()
filectx = filectx_tip.filectx(rev)
date = datetime.datetime.fromtimestamp(filectx.date()[0])
author = unicode(filectx.user(), "utf-8",
'replace').split('<')[0].strip()
comment = unicode(filectx.description(), "utf-8", 'replace')
return rev, date, author, comment
def repo_revision(self):
"""Give the latest revision of the repository."""
return self._changectx().rev()
def _changectx(self):
"""Get the changectx of the tip."""
try:
# This is for Mercurial 1.0
return self.repo.changectx()
except TypeError:
# Mercurial 1.3 (and possibly earlier) needs an argument
return self.repo.changectx('tip')
def _find_filectx(self, title):
"""Find the last revision in which the file existed."""
repo_file = self._title_to_file(title)
stack = [self._changectx()]
while stack:
changectx = stack.pop()
if repo_file in changectx:
return changectx[repo_file]
if changectx.rev() == 0:
return None
for parent in changectx.parents():
if parent != changectx:
stack.append(parent)
return None
def page_history(self, title):
"""Iterate over the page's history."""
filectx_tip = self._find_filectx(title)
if filectx_tip is None:
return
maxrev = filectx_tip.filerev()
minrev = 0
for rev in range(maxrev, minrev - 1, -1):
filectx = filectx_tip.filectx(rev)
date = datetime.datetime.fromtimestamp(filectx.date()[0])
author = unicode(filectx.user(), "utf-8",
'replace').split('<')[0].strip()
comment = unicode(filectx.description(), "utf-8", 'replace')
yield rev, date, author, comment
def page_revision(self, title, rev):
"""Get binary content of the specified revision of the page."""
filectx_tip = self._find_filectx(title)
if filectx_tip is None:
raise error.NotFoundErr()
try:
data = filectx_tip.filectx(rev).data()
except IndexError:
raise error.NotFoundErr()
return data
def revision_text(self, title, rev):
"""Get unicode text of the specified revision of the page."""
data = self.page_revision(title, rev)
text = unicode(data, self.charset, 'replace')
return text
def history(self):
"""Iterate over the history of entire wiki."""
changectx = self._changectx()
maxrev = changectx.rev()
minrev = 0
for wiki_rev in range(maxrev, minrev - 1, -1):
change = self.repo.changectx(wiki_rev)
date = datetime.datetime.fromtimestamp(change.date()[0])
author = unicode(change.user(), "utf-8",
'replace').split('<')[0].strip()
comment = unicode(change.description(), "utf-8", 'replace')
for repo_file in change.files():
if repo_file.startswith(self.repo_prefix):
title = self._file_to_title(repo_file)
try:
rev = change[repo_file].filerev()
except mercurial.revlog.LookupError:
rev = -1
yield title, rev, date, author, comment
def all_pages(self):
"""Iterate over the titles of all pages in the wiki."""
for filename in os.listdir(self.path):
file_path = os.path.join(self.path, filename)
file_repopath = os.path.join(self.repo_prefix, filename)
if (os.path.isfile(file_path)
and not os.path.islink(file_path)
and not filename.startswith('.')):
yield self._file_to_title(file_repopath)
def changed_since(self, rev):
"""
Return all pages that changed since specified repository revision.
"""
try:
last = self.repo.lookup(int(rev))
except IndexError:
for page in self.all_pages():
yield page
return
current = self.repo.lookup('tip')
status = self.repo.status(current, last)
modified, added, removed, deleted, unknown, ignored, clean = status
for filename in modified + added + removed + deleted:
if filename.startswith(self.repo_prefix):
yield self._file_to_title(filename)
class WikiSubdirectoryStorage(WikiStorage):
"""
A version of WikiStorage that keeps the subpages in real subdirectories in
the filesystem. Indexes supported.
"""
periods_re = re.compile(r'^[.]|(?<=/)[.]')
slashes_re = re.compile(r'^[/]|(?<=/)[/]')
# TODO: make them configurable
index = "Index"
def _title_to_file(self, title):
"""
Modified escaping allowing (some) slashes and spaces.
If the entry is a directory, use an index file.
"""
title = unicode(title).strip()
escaped = werkzeug.url_quote(title, safe='/ ')
escaped = self.periods_re.sub('%2E', escaped)
escaped = self.slashes_re.sub('%2F', escaped)
path = os.path.join(self.repo_prefix, escaped)
if os.path.isdir(os.path.join(self.repo_path, path)):
path = os.path.join(path, self.index)
if page.page_mime(title) == 'text/x-wiki' and self.extension:
path += self.extension
return path
def _file_to_title(self, filepath):
"""If the path points to an index file, use the directory."""
if os.path.basename(filepath) == self.index:
filepath = os.path.dirname(filepath)
return super(WikiSubdirectoryStorage, self)._file_to_title(filepath)
def turn_into_subdirectory(self, path):
"""Turn a single-file page into an index page inside a subdirectory."""
_ = self._
self._check_path(path)
dir_path = os.path.dirname(path)
if not os.path.isdir(dir_path):
self.turn_into_subdirectory(dir_path)
if not os.path.exists(path):
os.mkdir(path)
return
try:
temp_dir = tempfile.mkdtemp(dir=self.path)
temp_path = os.path.join(temp_dir, 'saved')
mercurial.commands.rename(self.ui, self.repo, path, temp_path)
os.makedirs(path)
index_path = os.path.join(path, self.index)
mercurial.commands.rename(self.ui, self.repo, temp_path,
index_path)
finally:
try:
os.rmdir(temp_dir)
except OSError:
pass
def repo_path(path):
return path[len(self.repo_path)+1:]
files = [repo_path(index_path), repo_path(path)]
self._commit(files, _(u"made subdirectory page"), "<wiki>")
@locked_repo
def save_file(self, title, file_name, author=u'', comment=u'',
parent=None):
"""Save the file and make the subdirectories if needed."""
path = self._file_path(title)
dir_path = os.path.dirname(path)
if not os.path.isdir(dir_path):
self.turn_into_subdirectory(dir_path)
try:
os.makedirs(os.path.join(self.repo_path, dir_path))
except OSError, e:
if e.errno != errno.EEXIST:
# "File exists"
raise
super(WikiSubdirectoryStorage, self).save_file(title, file_name,
author, comment, parent)
@locked_repo
def delete_page(self, title, author=u'', comment=u''):
"""
Remove empty directories after deleting a page.
Note that Mercurial doesn't track directories, so we don't have to
commit after removing empty directories.
"""
super(WikiSubdirectoryStorage, self).delete_page(title, author,
comment)
file_path = self._file_path(title)
self._check_path(file_path)
dir_path = os.path.dirname(file_path)
if dir_path != self.repo_path:
try:
os.removedirs(dir_path)
except OSError, e:
if e.errno != errno.ENOTEMPTY:
# "Directory not empty"
raise
def all_pages(self):
"""
Iterate over the titles of all pages in the wiki.
Include subdirectories but skip over index.
"""
for (dirpath, dirnames, filenames) in os.walk(self.path):
path = dirpath[len(self.path) + 1:]
for name in filenames:
filepath = os.path.join(dirpath, name)
repopath = os.path.join(self.repo_prefix, path, name)
if (os.path.isfile(filepath)
and not name.startswith('.')):
yield self._file_to_title(repopath)
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