realms-wiki/realms/lib/wiki.py

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Python
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import os
import re
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import lxml.html
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from lxml.html.clean import Cleaner
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import ghdiff
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import gittle.utils
from gittle import Gittle
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from dulwich.repo import NotGitRepository
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from werkzeug.utils import escape, unescape
from util import to_canonical
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from realms.models import Site
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class MyGittle(Gittle):
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def file_history(self, path):
"""Returns all commits where given file was modified
"""
versions = []
commits_info = self.commit_info()
seen_shas = set()
for commit in commits_info:
try:
files = self.get_commit_files(commit['sha'], paths=[path])
file_path, file_data = files.items()[0]
except IndexError:
continue
file_sha = file_data['sha']
if file_sha in seen_shas:
continue
else:
seen_shas.add(file_sha)
versions.append(dict(author=commit['author']['name'],
time=commit['time'],
file_sha=file_sha,
sha=commit['sha'],
message=commit['message']))
return versions
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def mv_fs(self, file_pair):
old_name, new_name = file_pair
os.rename(self.path + "/" + old_name, self.path + "/" + new_name)
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class Wiki():
path = None
base_path = '/'
default_ref = 'master'
default_committer_name = 'Anon'
default_committer_email = 'anon@anon.anon'
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index_page = 'home'
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repo = None
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def __init__(self, path):
try:
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self.repo = MyGittle(path)
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except NotGitRepository:
self.repo = MyGittle.init(path)
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self.path = path
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def revert_page(self, name, commit_sha, message, username):
page = self.get_page(name, commit_sha)
if not page:
# Page not found
return None
commit_info = gittle.utils.git.commit_info(self.repo[commit_sha])
message = commit_info['message']
return self.write_page(name, page['data'], message=message, username=username)
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def write_page(self, name, content, message=None, create=False, username=None, email=None):
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def escape_repl(m):
if m.group(1):
return "```" + escape(m.group(1)) + "```"
def unescape_repl(m):
if m.group(1):
return "```" + unescape(m.group(1)) + "```"
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# prevents p tag from being added, we remove this later
content = '<div>' + content + '</div>'
content = re.sub(r"```(.*?)```", escape_repl, content, flags=re.DOTALL)
tree = lxml.html.fromstring(content)
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cleaner = Cleaner(remove_unknown_tags=False,
kill_tags=set(['style']),
safe_attrs_only=False)
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tree = cleaner.clean_html(tree)
content = lxml.html.tostring(tree, encoding='utf-8', method='html')
# post processing to fix errors
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content = content[5:-6]
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# FIXME this is for block quotes, doesn't work for double ">"
content = re.sub(r"(\n&gt;)", "\n>", content)
content = re.sub(r"(^&gt;)", ">", content)
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content = re.sub(r"```(.*?)```", unescape_repl, content, flags=re.DOTALL)
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filename = self.cname_to_filename(to_canonical(name))
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f = open(self.path + "/" + filename, 'w')
f.write(content)
f.close()
if create:
self.repo.add(filename)
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if not message:
message = "Updated %s" % name
if not username:
username = self.default_committer_name
if not email:
email = "%s@realms.io" % username
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return self.repo.commit(name=username,
email=email,
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message=message,
files=[filename])
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def rename_page(self, old_name, new_name):
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old_name, new_name = map(self.cname_to_filename, [old_name, new_name])
self.repo.mv([(old_name, new_name)])
self.repo.commit(name=self.default_committer_name,
email=self.default_committer_email,
message="Moving %s to %s" % (old_name, new_name),
files=[old_name])
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def get_page(self, name, sha='HEAD'):
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# commit = gittle.utils.git.commit_info(self.repo[sha])
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name = self.cname_to_filename(name)
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try:
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return self.repo.get_commit_files(sha, paths=[name]).get(name)
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except KeyError:
# HEAD doesn't exist yet
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return None
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def compare(self, name, old_sha, new_sha):
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old = self.get_page(name, sha=old_sha)
new = self.get_page(name, sha=new_sha)
return ghdiff.diff(old['data'], new['data'])
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def get_history(self, name):
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return self.repo.file_history(self.cname_to_filename(name))
def cname_to_filename(self, cname):
return cname.lower() + ".md"