view hgext/infinitepush/fileindexapi.py @ 46371:0903d6b9b1df

repository: introduce register_changeset callback

The new callback is called whenever a changeset is added to the repository
(commit, unbundle or exchange). Since the bulk operations already parse
the changeset (readfiles or full changesetrevision), always use the
latter to avoid redundant lookups. The first consumer of the new
interface needs to look at extra.

Differential Revision: https://phab.mercurial-scm.org/D9780

# 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)