345 | );
346 | }
347 |
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/style/icons/md/LICENSE:
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--------------------------------------------------------------------------------
/jupyterlab_gallery/gitpuller.py:
--------------------------------------------------------------------------------
1 | # Based on https://github.com/jupyterhub/nbgitpuller/blob/main/nbgitpuller/handlers.py
2 | # which is distributed under BSD 3-Clause License
3 | # Copyright (c) 2017, YuviPanda, Peter Veerman
4 | #
5 | # Modified to allow:
6 | # - restricting which repositories can be cloned
7 | # - reconnecting to the event stream when refreshing the browser
8 | # - handling multiple waiting pulls
9 | from tornado import gen, web, locks
10 | import asyncio
11 | import logging
12 | import traceback
13 |
14 | import threading
15 | import json
16 | import os
17 | from queue import Queue, Empty
18 | from collections import defaultdict
19 | from typing import Optional, TypedDict
20 |
21 | import git
22 | from jupyter_server.base.handlers import JupyterHandler
23 | from nbgitpuller.pull import GitPuller
24 | from tornado.iostream import StreamClosedError
25 |
26 | from .git_utils import git_credentials
27 |
28 |
29 | class CloneProgress(git.RemoteProgress):
30 | def __init__(self):
31 | self.queue = Queue()
32 | self.max_stage = 0.01
33 | self.prev_stage = 0
34 | super().__init__()
35 |
36 | def update(self, op_code: int, cur_count, max_count=None, message=""):
37 | if op_code & git.RemoteProgress.BEGIN:
38 | new_stage = None
39 | if op_code & git.RemoteProgress.COUNTING:
40 | new_stage = 0.05
41 | elif op_code & git.RemoteProgress.COMPRESSING:
42 | new_stage = 0.10
43 | elif op_code & git.RemoteProgress.RECEIVING:
44 | new_stage = 0.90
45 | elif op_code & git.RemoteProgress.RESOLVING:
46 | new_stage = 1
47 |
48 | if new_stage:
49 | self.prev_stage = self.max_stage
50 | self.max_stage = new_stage
51 |
52 | if isinstance(cur_count, (int, float)) and isinstance(max_count, (int, float)):
53 | progress = self.prev_stage + cur_count / max_count * (
54 | self.max_stage - self.prev_stage
55 | )
56 | self.queue.put(
57 | Update(
58 | progress=progress,
59 | message=message,
60 | )
61 | )
62 | # self.queue.join()
63 |
64 |
65 | class ProgressGitPuller(GitPuller):
66 | def __init__(
67 | self, git_url, repo_dir, token: Optional[str], account: Optional[str], **kwargs
68 | ):
69 | self._token = token
70 | self._account = account
71 | # it will attempt to resolve default branch which requires credentials too
72 | with git_credentials(token=self._token, account=self._account):
73 | super().__init__(git_url, repo_dir, **kwargs)
74 |
75 | def initialize_repo(self):
76 | logging.info("Repo {} doesn't exist. Cloning...".format(self.repo_dir))
77 | progress = CloneProgress()
78 |
79 | def clone_task():
80 | with git_credentials(token=self._token, account=self._account):
81 | try:
82 | git.Repo.clone_from(
83 | self.git_url,
84 | self.repo_dir,
85 | branch=self.branch_name,
86 | depth=self.depth,
87 | progress=progress,
88 | )
89 | except Exception as e:
90 | progress.queue.put(e)
91 | finally:
92 | progress.queue.put(None)
93 |
94 | threading.Thread(target=clone_task).start()
95 | # TODO: add configurable timeout
96 | # timeout = 60
97 |
98 | while True:
99 | item = progress.queue.get(True) # , timeout)
100 | if item is None:
101 | break
102 | yield item
103 |
104 | logging.info("Repo {} initialized".format(self.repo_dir))
105 |
106 | def update(self):
107 | with git_credentials(token=self._token, account=self._account):
108 | yield from super().update()
109 |
110 |
111 | class Update(TypedDict):
112 | progress: float
113 | message: str
114 |
115 |
116 | class SyncHandlerBase(JupyterHandler):
117 | def __init__(self, *args, **kwargs):
118 | super().__init__(*args, **kwargs)
119 |
120 | if "pull_status_queues" not in self.settings:
121 | self.settings["pull_status_queues"] = defaultdict(Queue)
122 |
123 | if "last_message" not in self.settings:
124 | self.settings["last_message"] = {}
125 |
126 | # We use this lock to make sure that only one sync operation
127 | # can be happening at a time. Git doesn't like concurrent use!
128 | if "git_lock" not in self.settings:
129 | self.settings["git_lock"] = locks.Lock()
130 |
131 | if "enqueue_task" not in self.settings:
132 | task = asyncio.create_task(self._enqueue_messages())
133 | self.settings["enqueue_task"] = task
134 | task.add_done_callback(lambda task: self.settings.pop("enqueue_task"))
135 |
136 | def get_login_url(self):
137 | # raise on failed auth, not redirect
138 | # can't redirect EventStream to login
139 | # same as Jupyter's APIHandler
140 | raise web.HTTPError(403)
141 |
142 | @property
143 | def git_lock(self):
144 | return self.settings["git_lock"]
145 |
146 | async def _pull(
147 | self,
148 | repo: str,
149 | targetpath: str,
150 | exhibit_id: int,
151 | token: Optional[str],
152 | account: Optional[str],
153 | branch: Optional[str],
154 | depth: Optional[int],
155 | ):
156 | q = self.settings["pull_status_queues"][exhibit_id]
157 | try:
158 | q.put_nowait(Update(progress=0.01, message="Waiting for a lock"))
159 | await self.git_lock.acquire(5)
160 | q.put_nowait(Update(progress=0.02, message="Lock acquired"))
161 | except gen.TimeoutError:
162 | q.put_nowait(
163 | gen.TimeoutError(
164 | "Another git operations is currently running, try again in a few minutes"
165 | )
166 | )
167 | return
168 |
169 | try:
170 | # The default working directory is the directory from which Jupyter
171 | # server is launched, which is not the same as the root notebook
172 | # directory assuming either --notebook-dir= is used from the
173 | # command line or c.NotebookApp.notebook_dir is set in the jupyter
174 | # configuration. This line assures that all repos are cloned
175 | # relative to server_root_dir/,
176 | # so that all repos are always in scope after cloning. Sometimes
177 | # server_root_dir will include things like `~` and so the path
178 | # must be expanded.
179 | repo_parent_dir = os.path.join(
180 | os.path.expanduser(self.settings["server_root_dir"]),
181 | os.getenv("NBGITPULLER_PARENTPATH", ""),
182 | )
183 | repo_dir = os.path.join(repo_parent_dir, targetpath or repo.split("/")[-1])
184 |
185 | gp = ProgressGitPuller(
186 | repo,
187 | repo_dir,
188 | branch=branch,
189 | depth=depth,
190 | parent=self.settings["nbapp"],
191 | # our additions
192 | token=token,
193 | account=account,
194 | )
195 |
196 | def pull():
197 | try:
198 | for update in gp.pull():
199 | q.put_nowait(update)
200 | # Sentinel when we're done
201 | q.put_nowait(None)
202 | except Exception as e:
203 | raise e
204 |
205 | self.gp_thread = threading.Thread(target=pull)
206 | self.gp_thread.start()
207 | except Exception as e:
208 | q.put_nowait(e)
209 | finally:
210 | self.git_lock.release()
211 |
212 | async def emit(self, data: dict):
213 | serialized_data = json.dumps(data)
214 | self.write("data: {}\n\n".format(serialized_data))
215 | await self.flush()
216 |
217 | async def _enqueue_messages(self):
218 | last_message = self.settings["last_message"]
219 | queues = self.settings["pull_status_queues"]
220 | while True:
221 | empty_queues = 0
222 | # copy to avoid error due to size change during iteration:
223 | queues_view = queues.copy()
224 | for exhibit_id, q in queues_view.items():
225 | # try to consume next message
226 | try:
227 | progress = q.get_nowait()
228 | except Empty:
229 | empty_queues += 1
230 | continue
231 |
232 | if progress is None:
233 | msg = {"phase": "finished", "exhibit_id": exhibit_id}
234 | del self.settings["pull_status_queues"][exhibit_id]
235 | elif isinstance(progress, dict):
236 | msg = {
237 | "output": progress,
238 | "phase": "progress",
239 | "exhibit_id": exhibit_id,
240 | }
241 | elif isinstance(progress, Exception):
242 | msg = {
243 | "phase": "error",
244 | "exhibit_id": exhibit_id,
245 | "message": str(progress),
246 | "output": "\n".join(
247 | [
248 | line.strip()
249 | for line in traceback.format_exception(
250 | type(progress), progress, progress.__traceback__
251 | )
252 | ]
253 | ),
254 | }
255 | else:
256 | msg = {
257 | "output": progress,
258 | "phase": "syncing",
259 | "exhibit_id": exhibit_id,
260 | }
261 |
262 | last_message[exhibit_id] = msg
263 |
264 | if empty_queues == len(queues_view):
265 | await gen.sleep(0.1)
266 |
267 | async def _stream(self):
268 | # We gonna send out event streams!
269 | self.set_header("content-type", "text/event-stream")
270 | self.set_header("cache-control", "no-cache")
271 |
272 | # https://bugzilla.mozilla.org/show_bug.cgi?id=833462
273 | await self.emit({"phase": "connected"})
274 |
275 | last_message = self.settings["last_message"]
276 | last_message_sent = {}
277 |
278 | # stream new messages as they are put on respective queues
279 | while True:
280 | messages_view = last_message.copy()
281 | unchanged = 0
282 | for exhibit_id, msg in messages_view.items():
283 | # emit an update if anything changed
284 | if last_message_sent.get(exhibit_id) == msg:
285 | unchanged += 1
286 | continue
287 | last_message_sent[exhibit_id] = msg
288 | try:
289 | await self.emit(msg)
290 | except StreamClosedError as e:
291 | # this is expected to happen whenever client closes (e.g. user
292 | # closes the browser or refreshes the tab with JupterLab)
293 | if e.real_error:
294 | self.warn.info(
295 | f"git puller stream got closed with error {e.real_error}"
296 | )
297 | else:
298 | self.log.info("git puller stream closed")
299 | # return to stop reading messages, so that the next
300 | # client who connects can consume them
301 | return
302 | if unchanged == len(messages_view):
303 | await gen.sleep(0.1)
304 |
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