##// END OF EJS Templates
git: skeleton of a new extension to _directly_ operate on git repos...
git: skeleton of a new extension to _directly_ operate on git repos This is based in part of work I did years ago in hgit, but it's mostly new code since I'm using pygit2 instead of dulwich and the hg storage interfaces have improved. Some cleanup of old hgit code by Pulkit, which I greatly appreciate. test-git-interop.t does not cover a whole lot of cases, but it passes. It includes status, diff, making a new commit, and `hg annotate` working on the git repository. This is _not_ (yet) production quality code: this is an experiment. Known technical debt lurking in this implementation: * Writing bookmarks just totally ignores transactions. * The way progress is threaded down into the gitstore is awful. * Ideally we'd find a way to incrementally reindex DAGs. I'm not sure how to do that efficiently, so we might need a "known only fast-forwards" mode on the DAG indexer for use on `hg commit` and friends. * We don't even _try_ to do anything reasonable for `hg pull` or `hg push`. * Mercurial need an interface for the changelog type. Tests currently require git 2.24 as far as I'm aware: `git status` has some changed output that I didn't try and handle in a compatible way. This patch has produced some interesting cleanups, most recently on the manifest type. I expect continuing down this road will produce other meritorious cleanups throughout our code. Differential Revision: https://phab.mercurial-scm.org/D6734

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fileindexapi.py
111 lines | 3.4 KiB | text/x-python | PythonLexer
# Infinite push
#
# Copyright 2016 Facebook, Inc.
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
"""
[infinitepush]
# Server-side option. Used only if indextype=disk.
# Filesystem path to the index store
indexpath = PATH
"""
from __future__ import absolute_import
import os
from mercurial import util
from mercurial.utils import stringutil
from . import indexapi
class fileindexapi(indexapi.indexapi):
def __init__(self, repo):
super(fileindexapi, self).__init__()
self._repo = repo
root = repo.ui.config(b'infinitepush', b'indexpath')
if not root:
root = os.path.join(b'scratchbranches', b'index')
self._nodemap = os.path.join(root, b'nodemap')
self._bookmarkmap = os.path.join(root, b'bookmarkmap')
self._metadatamap = os.path.join(root, b'nodemetadatamap')
self._lock = None
def __enter__(self):
self._lock = self._repo.wlock()
return self
def __exit__(self, exc_type, exc_val, exc_tb):
if self._lock:
self._lock.__exit__(exc_type, exc_val, exc_tb)
def addbundle(self, bundleid, nodesctx):
for node in nodesctx:
nodepath = os.path.join(self._nodemap, node.hex())
self._write(nodepath, bundleid)
def addbookmark(self, bookmark, node):
bookmarkpath = os.path.join(self._bookmarkmap, bookmark)
self._write(bookmarkpath, node)
def addmanybookmarks(self, bookmarks):
for bookmark, node in bookmarks.items():
self.addbookmark(bookmark, node)
def deletebookmarks(self, patterns):
for pattern in patterns:
for bookmark, _ in self._listbookmarks(pattern):
bookmarkpath = os.path.join(self._bookmarkmap, bookmark)
self._delete(bookmarkpath)
def getbundle(self, node):
nodepath = os.path.join(self._nodemap, node)
return self._read(nodepath)
def getnode(self, bookmark):
bookmarkpath = os.path.join(self._bookmarkmap, bookmark)
return self._read(bookmarkpath)
def getbookmarks(self, query):
return dict(self._listbookmarks(query))
def saveoptionaljsonmetadata(self, node, jsonmetadata):
vfs = self._repo.vfs
vfs.write(os.path.join(self._metadatamap, node), jsonmetadata)
def _listbookmarks(self, pattern):
if pattern.endswith(b'*'):
pattern = b're:^' + pattern[:-1] + b'.*'
kind, pat, matcher = stringutil.stringmatcher(pattern)
prefixlen = len(self._bookmarkmap) + 1
for dirpath, _, books in self._repo.vfs.walk(self._bookmarkmap):
for book in books:
bookmark = os.path.join(dirpath, book)[prefixlen:]
bookmark = util.pconvert(bookmark)
if not matcher(bookmark):
continue
yield bookmark, self._read(os.path.join(dirpath, book))
def _write(self, path, value):
vfs = self._repo.vfs
dirname = vfs.dirname(path)
if not vfs.exists(dirname):
vfs.makedirs(dirname)
vfs.write(path, value)
def _read(self, path):
vfs = self._repo.vfs
if not vfs.exists(path):
return None
return vfs.read(path)
def _delete(self, path):
vfs = self._repo.vfs
if not vfs.exists(path):
return
return vfs.unlink(path)