# RhodeCode VCSServer provides access to different vcs backends via network. # Copyright (C) 2014-2023 RhodeCode GmbH # # 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 3 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 import io import os import sys import logging import collections import base64 import msgpack import dataclasses import pygit2 import http.client from celery import Celery import mercurial.scmutil import mercurial.node from vcsserver import exceptions, subprocessio, settings from vcsserver.lib.ext_json import json from vcsserver.lib.str_utils import ascii_str, safe_str from vcsserver.lib.svn_txn_utils import get_txn_id_from_store from vcsserver.remote.git_remote import Repository celery_app = Celery('__vcsserver__') log = logging.getLogger(__name__) class HooksCeleryClient: TASK_TIMEOUT = 60 # time in seconds def __init__(self, queue, backend): celery_app.config_from_object({ 'broker_url': queue, 'result_backend': backend, 'broker_connection_retry_on_startup': True, 'task_serializer': 'json', 'accept_content': ['json', 'msgpack'], 'result_serializer': 'json', 'result_accept_content': ['json', 'msgpack'] }) self.celery_app = celery_app def __call__(self, method, extras): inquired_task = self.celery_app.signature( f'rhodecode.lib.celerylib.tasks.{method}' ) result = inquired_task.delay(extras).get(timeout=self.TASK_TIMEOUT) return result class HooksShadowRepoClient: def __call__(self, hook_name, extras): return {'output': '', 'status': 0} class RemoteMessageWriter: """Writer base class.""" def write(self, message): raise NotImplementedError() class HgMessageWriter(RemoteMessageWriter): """Writer that knows how to send messages to mercurial clients.""" def __init__(self, ui): self.ui = ui def write(self, message: str): # TODO: Check why the quiet flag is set by default. old = self.ui.quiet self.ui.quiet = False self.ui.status(message.encode('utf-8')) self.ui.quiet = old class GitMessageWriter(RemoteMessageWriter): """Writer that knows how to send messages to git clients.""" def __init__(self, stdout=None): self.stdout = stdout or sys.stdout def write(self, message: str): self.stdout.write(message) class SvnMessageWriter(RemoteMessageWriter): """Writer that knows how to send messages to svn clients.""" def __init__(self, stderr=None): # SVN needs data sent to stderr for back-to-client messaging self.stderr = stderr or sys.stderr def write(self, message): self.stderr.write(message) def _maybe_handle_exception(result): exception_class = result.get('exception') exception_traceback = result.get('exception_traceback') if not exception_class: return log.debug('Handling hook-call exception: %s', exception_class) if exception_traceback: log.error('Got traceback from remote call:%s', exception_traceback) if exception_class == 'HTTPLockedRepo': raise exceptions.LockedRepoException()(*result['exception_args']) elif exception_class == 'ClientNotSupportedError': raise exceptions.ClientNotSupportedException()(*result['exception_args']) elif exception_class == 'HTTPBranchProtected': raise exceptions.RepositoryBranchProtectedException()(*result['exception_args']) elif exception_class == 'RepositoryError': raise exceptions.VcsException()(*result['exception_args']) elif exception_class: raise Exception( f"""Got remote exception "{exception_class}" with args "{result['exception_args']}" """ ) def _get_hooks_client(extras): task_queue = extras.get('task_queue') task_backend = extras.get('task_backend') is_shadow_repo = extras.get('is_shadow_repo') if task_queue and task_backend: return HooksCeleryClient(task_queue, task_backend) elif is_shadow_repo: return HooksShadowRepoClient() else: raise Exception("Hooks client not found!") def _call_hook(hook_name, extras, writer): hooks_client = _get_hooks_client(extras) log.debug('Hooks, using client:%s', hooks_client) result = hooks_client(hook_name, extras) log.debug('Hooks got result: %s', result) _maybe_handle_exception(result) writer.write(result['output']) return result['status'] def _extras_from_ui(ui): hook_data = ui.config(b'rhodecode', b'RC_SCM_DATA') if not hook_data: # maybe it's inside environ ? env_hook_data = os.environ.get('RC_SCM_DATA') if env_hook_data: hook_data = env_hook_data extras = {} if hook_data: extras = json.loads(hook_data) return extras def _rev_range_hash(repo, node, check_heads=False): from vcsserver.hgcompat import get_ctx commits = [] revs = [] start = get_ctx(repo, node).rev() end = len(repo) for rev in range(start, end): revs.append(rev) ctx = get_ctx(repo, rev) commit_id = ascii_str(mercurial.node.hex(ctx.node())) branch = safe_str(ctx.branch()) commits.append((commit_id, branch)) parent_heads = [] if check_heads: parent_heads = _check_heads(repo, start, end, revs) return commits, parent_heads def _check_heads(repo, start, end, commits): from vcsserver.hgcompat import get_ctx changelog = repo.changelog parents = set() for new_rev in commits: for p in changelog.parentrevs(new_rev): if p == mercurial.node.nullrev: continue if p < start: parents.add(p) for p in parents: branch = get_ctx(repo, p).branch() # The heads descending from that parent, on the same branch parent_heads = {p} reachable = {p} for x in range(p + 1, end): if get_ctx(repo, x).branch() != branch: continue for pp in changelog.parentrevs(x): if pp in reachable: reachable.add(x) parent_heads.discard(pp) parent_heads.add(x) # More than one head? Suggest merging if len(parent_heads) > 1: return list(parent_heads) return [] def _get_git_env(): env = {} for k, v in os.environ.items(): if k.startswith('GIT'): env[k] = v # serialized version return [(k, v) for k, v in env.items()] def _get_hg_env(old_rev, new_rev, txnid, repo_path): env = {} for k, v in os.environ.items(): if k.startswith('HG'): env[k] = v env['HG_NODE'] = old_rev env['HG_NODE_LAST'] = new_rev env['HG_TXNID'] = txnid env['HG_PENDING'] = repo_path return [(k, v) for k, v in env.items()] def _get_ini_settings(ini_file): from vcsserver.http_main import sanitize_settings_and_apply_defaults from vcsserver.lib.config_utils import get_app_config_lightweight, configure_and_store_settings global_config = {'__file__': ini_file} ini_settings = get_app_config_lightweight(ini_file) sanitize_settings_and_apply_defaults(global_config, ini_settings) configure_and_store_settings(global_config, ini_settings) return ini_settings def _fix_hooks_executables(ini_path=''): """ This is a trick to set proper settings.EXECUTABLE paths for certain execution patterns especially for subversion where hooks strip entire env, and calling just 'svn' command will most likely fail because svn is not on PATH """ # set defaults, in case we can't read from ini_file core_binary_dir = settings.BINARY_DIR or '/usr/local/bin/rhodecode_bin/vcs_bin' if ini_path: ini_settings = _get_ini_settings(ini_path) core_binary_dir = ini_settings['core.binary_dir'] settings.BINARY_DIR = core_binary_dir def repo_size(ui, repo, **kwargs): extras = _extras_from_ui(ui) return _call_hook('repo_size', extras, HgMessageWriter(ui)) def pre_pull(ui, repo, **kwargs): extras = _extras_from_ui(ui) return _call_hook('pre_pull', extras, HgMessageWriter(ui)) def pre_pull_ssh(ui, repo, **kwargs): extras = _extras_from_ui(ui) if extras and extras.get('SSH'): return pre_pull(ui, repo, **kwargs) return 0 def post_pull(ui, repo, **kwargs): extras = _extras_from_ui(ui) return _call_hook('post_pull', extras, HgMessageWriter(ui)) def post_pull_ssh(ui, repo, **kwargs): extras = _extras_from_ui(ui) if extras and extras.get('SSH'): return post_pull(ui, repo, **kwargs) return 0 def pre_push(ui, repo, node=None, **kwargs): """ Mercurial pre_push hook """ extras = _extras_from_ui(ui) detect_force_push = extras.get('detect_force_push') rev_data = [] hook_type: str = safe_str(kwargs.get('hooktype')) if node and hook_type == 'pretxnchangegroup': branches = collections.defaultdict(list) commits, _heads = _rev_range_hash(repo, node, check_heads=detect_force_push) for commit_id, branch in commits: branches[branch].append(commit_id) for branch, commits in branches.items(): old_rev = ascii_str(kwargs.get('node_last')) or commits[0] rev_data.append({ 'total_commits': len(commits), 'old_rev': old_rev, 'new_rev': commits[-1], 'ref': '', 'type': 'branch', 'name': branch, }) for push_ref in rev_data: push_ref['multiple_heads'] = _heads repo_path = os.path.join( extras.get('repo_store', ''), extras.get('repository', '')) push_ref['hg_env'] = _get_hg_env( old_rev=push_ref['old_rev'], new_rev=push_ref['new_rev'], txnid=ascii_str(kwargs.get('txnid')), repo_path=repo_path) extras['hook_type'] = hook_type or 'pre_push' extras['commit_ids'] = rev_data return _call_hook('pre_push', extras, HgMessageWriter(ui)) def pre_push_ssh(ui, repo, node=None, **kwargs): extras = _extras_from_ui(ui) if extras.get('SSH'): return pre_push(ui, repo, node, **kwargs) return 0 def pre_push_ssh_auth(ui, repo, node=None, **kwargs): """ Mercurial pre_push hook for SSH """ extras = _extras_from_ui(ui) if extras.get('SSH'): permission = extras['SSH_PERMISSIONS'] if 'repository.write' == permission or 'repository.admin' == permission: return 0 # non-zero ret code return 1 return 0 def post_push(ui, repo, node, **kwargs): """ Mercurial post_push hook """ extras = _extras_from_ui(ui) commit_ids = [] branches = [] bookmarks = [] tags = [] hook_type: str = safe_str(kwargs.get('hooktype')) commits, _heads = _rev_range_hash(repo, node) for commit_id, branch in commits: commit_ids.append(commit_id) if branch not in branches: branches.append(branch) if hasattr(ui, '_rc_pushkey_bookmarks'): bookmarks = ui._rc_pushkey_bookmarks extras['hook_type'] = hook_type or 'post_push' extras['commit_ids'] = commit_ids extras['new_refs'] = { 'branches': branches, 'bookmarks': bookmarks, 'tags': tags } return _call_hook('post_push', extras, HgMessageWriter(ui)) def post_push_ssh(ui, repo, node, **kwargs): """ Mercurial post_push hook for SSH """ if _extras_from_ui(ui).get('SSH'): return post_push(ui, repo, node, **kwargs) return 0 def key_push(ui, repo, **kwargs): from vcsserver.hgcompat import get_ctx if kwargs['new'] != b'0' and kwargs['namespace'] == b'bookmarks': # store new bookmarks in our UI object propagated later to post_push ui._rc_pushkey_bookmarks = get_ctx(repo, kwargs['key']).bookmarks() return # backward compat log_pull_action = post_pull # backward compat log_push_action = post_push def handle_git_pre_receive(unused_repo_path, unused_revs, unused_env): """ Old hook name: keep here for backward compatibility. This is only required when the installed git hooks are not upgraded. """ pass def handle_git_post_receive(unused_repo_path, unused_revs, unused_env): """ Old hook name: keep here for backward compatibility. This is only required when the installed git hooks are not upgraded. """ pass @dataclasses.dataclass class HookResponse: status: int output: str def git_pre_pull(extras) -> HookResponse: """ Pre pull hook. :param extras: dictionary containing the keys defined in simplevcs :type extras: dict :return: status code of the hook. 0 for success. :rtype: int """ if 'pull' not in extras['hooks']: return HookResponse(0, '') stdout = io.StringIO() try: status_code = _call_hook('pre_pull', extras, GitMessageWriter(stdout)) except Exception as error: log.exception('Failed to call pre_pull hook') status_code = 128 stdout.write(f'ERROR: {error}\n') return HookResponse(status_code, stdout.getvalue()) def git_post_pull(extras) -> HookResponse: """ Post pull hook. :param extras: dictionary containing the keys defined in simplevcs :type extras: dict :return: status code of the hook. 0 for success. :rtype: int """ if 'pull' not in extras['hooks']: return HookResponse(0, '') stdout = io.StringIO() try: status = _call_hook('post_pull', extras, GitMessageWriter(stdout)) except Exception as error: status = 128 stdout.write(f'ERROR: {error}\n') return HookResponse(status, stdout.getvalue()) def _parse_git_ref_lines(revision_lines): rev_data = [] for revision_line in revision_lines or []: old_rev, new_rev, ref = revision_line.strip().split(' ') ref_data = ref.split('/', 2) if ref_data[1] in ('tags', 'heads'): rev_data.append({ # NOTE(marcink): # we're unable to tell total_commits for git at this point # but we set the variable for consistency with GIT 'total_commits': -1, 'old_rev': old_rev, 'new_rev': new_rev, 'ref': ref, 'type': ref_data[1], 'name': ref_data[2], }) return rev_data def git_pre_receive(unused_repo_path, revision_lines, env) -> int: """ Pre push hook. :return: status code of the hook. 0 for success. """ extras = json.loads(env['RC_SCM_DATA']) rev_data = _parse_git_ref_lines(revision_lines) if 'push' not in extras['hooks']: return 0 _fix_hooks_executables(env.get('RC_INI_FILE')) empty_commit_id = '0' * 40 detect_force_push = extras.get('detect_force_push') for push_ref in rev_data: # store our git-env which holds the temp store push_ref['git_env'] = _get_git_env() push_ref['pruned_sha'] = '' if not detect_force_push: # don't check for forced-push when we don't need to continue type_ = push_ref['type'] new_branch = push_ref['old_rev'] == empty_commit_id delete_branch = push_ref['new_rev'] == empty_commit_id if type_ == 'heads' and not (new_branch or delete_branch): old_rev = push_ref['old_rev'] new_rev = push_ref['new_rev'] cmd = [settings.GIT_EXECUTABLE(), 'rev-list', old_rev, f'^{new_rev}'] stdout, stderr = subprocessio.run_command( cmd, env=os.environ.copy()) # means we're having some non-reachable objects, this forced push was used if stdout: push_ref['pruned_sha'] = stdout.splitlines() extras['hook_type'] = 'pre_receive' extras['commit_ids'] = rev_data stdout = sys.stdout status_code = _call_hook('pre_push', extras, GitMessageWriter(stdout)) return status_code def git_post_receive(unused_repo_path, revision_lines, env) -> int: """ Post push hook. :return: status code of the hook. 0 for success. """ extras = json.loads(env['RC_SCM_DATA']) if 'push' not in extras['hooks']: return 0 _fix_hooks_executables(env.get('RC_INI_FILE')) rev_data = _parse_git_ref_lines(revision_lines) git_revs = [] # N.B.(skreft): it is ok to just call git, as git before calling a # subcommand sets the PATH environment variable so that it point to the # correct version of the git executable. empty_commit_id = '0' * 40 branches = [] tags = [] for push_ref in rev_data: type_ = push_ref['type'] if type_ == 'heads': # starting new branch case if push_ref['old_rev'] == empty_commit_id: push_ref_name = push_ref['name'] if push_ref_name not in branches: branches.append(push_ref_name) need_head_set = '' with Repository(os.getcwd()) as repo: try: repo.head except pygit2.GitError: need_head_set = f'refs/heads/{push_ref_name}' if need_head_set: repo.set_head(need_head_set) print(f"Setting default branch to {push_ref_name}") cmd = [settings.GIT_EXECUTABLE(), 'for-each-ref', '--format=%(refname)', 'refs/heads/*'] stdout, stderr = subprocessio.run_command( cmd, env=os.environ.copy()) heads = safe_str(stdout) heads = heads.replace(push_ref['ref'], '') heads = ' '.join(head for head in heads.splitlines() if head) or '.' cmd = [settings.GIT_EXECUTABLE(), 'log', '--reverse', '--pretty=format:%H', '--', push_ref['new_rev'], '--not', heads] stdout, stderr = subprocessio.run_command( cmd, env=os.environ.copy()) git_revs.extend(list(map(ascii_str, stdout.splitlines()))) # delete branch case elif push_ref['new_rev'] == empty_commit_id: git_revs.append(f'delete_branch=>{push_ref["name"]}') else: if push_ref['name'] not in branches: branches.append(push_ref['name']) cmd = [settings.GIT_EXECUTABLE(), 'log', f'{push_ref["old_rev"]}..{push_ref["new_rev"]}', '--reverse', '--pretty=format:%H'] stdout, stderr = subprocessio.run_command( cmd, env=os.environ.copy()) # we get bytes from stdout, we need str to be consistent log_revs = list(map(ascii_str, stdout.splitlines())) git_revs.extend(log_revs) # Pure pygit2 impl. but still 2-3x slower :/ # results = [] # # with Repository(os.getcwd()) as repo: # repo_new_rev = repo[push_ref['new_rev']] # repo_old_rev = repo[push_ref['old_rev']] # walker = repo.walk(repo_new_rev.id, pygit2.GIT_SORT_TOPOLOGICAL) # # for commit in walker: # if commit.id == repo_old_rev.id: # break # results.append(commit.id.hex) # # reverse the order, can't use GIT_SORT_REVERSE # log_revs = results[::-1] elif type_ == 'tags': if push_ref['name'] not in tags: tags.append(push_ref['name']) git_revs.append(f'tag=>{push_ref["name"]}') extras['hook_type'] = 'post_receive' extras['commit_ids'] = git_revs extras['new_refs'] = { 'branches': branches, 'bookmarks': [], 'tags': tags, } stdout = sys.stdout if 'repo_size' in extras['hooks']: try: _call_hook('repo_size', extras, GitMessageWriter(stdout)) except Exception: pass status_code = _call_hook('post_push', extras, GitMessageWriter(stdout)) return status_code def get_extras_from_txn_id(repo_path, txn_id): extras = get_txn_id_from_store(repo_path, txn_id) return extras def svn_pre_commit(repo_path, commit_data, env): path, txn_id = commit_data branches = [] tags = [] if env.get('RC_SCM_DATA'): extras = json.loads(env['RC_SCM_DATA']) else: ini_path = env.get('RC_INI_FILE') if ini_path: _get_ini_settings(ini_path) # fallback method to read from TXN-ID stored data extras = get_extras_from_txn_id(path, txn_id) if not extras: raise ValueError('SVN-PRE-COMMIT: Failed to extract context data in called extras for hook execution') if extras.get('rc_internal_commit'): # special marker for internal commit, we don't call hooks client return 0 extras['hook_type'] = 'pre_commit' extras['commit_ids'] = [txn_id] extras['txn_id'] = txn_id extras['new_refs'] = { 'total_commits': 1, 'branches': branches, 'bookmarks': [], 'tags': tags, } return _call_hook('pre_push', extras, SvnMessageWriter()) def svn_post_commit(repo_path, commit_data, env): """ commit_data is path, rev, txn_id """ if len(commit_data) == 3: path, commit_id, txn_id = commit_data elif len(commit_data) == 2: log.error('Failed to extract txn_id from commit_data using legacy method. ' 'Some functionality might be limited') path, commit_id = commit_data txn_id = None else: return 0 branches = [] tags = [] if env.get('RC_SCM_DATA'): extras = json.loads(env['RC_SCM_DATA']) else: ini_path = env.get('RC_INI_FILE') if ini_path: _get_ini_settings(ini_path) # fallback method to read from TXN-ID stored data extras = get_extras_from_txn_id(path, txn_id) if not extras and txn_id: raise ValueError('SVN-POST-COMMIT: Failed to extract context data in called extras for hook execution') if extras.get('rc_internal_commit'): # special marker for internal commit, we don't call hooks client return 0 extras['hook_type'] = 'post_commit' extras['commit_ids'] = [commit_id] extras['txn_id'] = txn_id extras['new_refs'] = { 'branches': branches, 'bookmarks': [], 'tags': tags, 'total_commits': 1, } if 'repo_size' in extras['hooks']: try: _call_hook('repo_size', extras, SvnMessageWriter()) except Exception: pass return _call_hook('post_push', extras, SvnMessageWriter())