Mercurial > hg
view hgext/infinitepush/store.py @ 41098:cfd95219102d
strip: move attributes shortcut assigned earlier
This series will add support for "soft" stripping using the archived phase in
addition to the usual heavy weight revlog stripping. First, we need to
refactor the strip function to extract logic common to the "soft-strip" case.
We are about to extract bits of the strip function into separate functions.
Those blocks of code contain variables for frequently accessed attributes. We
move those variables outside of the soon to be moved blocks.
author | Boris Feld <boris.feld@octobus.net> |
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date | Wed, 02 Jan 2019 05:02:25 +0100 |
parents | 090e5f3900b7 |
children | 2372284d9457 |
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# This software may be used and distributed according to the terms of the # GNU General Public License version 2 or any later version. # based on bundleheads extension by Gregory Szorc <gps@mozilla.com> from __future__ import absolute_import import abc import hashlib import os import subprocess import tempfile from mercurial import ( node, pycompat, ) from mercurial.utils import ( procutil, ) NamedTemporaryFile = tempfile.NamedTemporaryFile class BundleWriteException(Exception): pass class BundleReadException(Exception): pass class abstractbundlestore(object): """Defines the interface for bundle stores. A bundle store is an entity that stores raw bundle data. It is a simple key-value store. However, the keys are chosen by the store. The keys can be any Python object understood by the corresponding bundle index (see ``abstractbundleindex`` below). """ __metaclass__ = abc.ABCMeta @abc.abstractmethod def write(self, data): """Write bundle data to the store. This function receives the raw data to be written as a str. Throws BundleWriteException The key of the written data MUST be returned. """ @abc.abstractmethod def read(self, key): """Obtain bundle data for a key. Returns None if the bundle isn't known. Throws BundleReadException The returned object should be a file object supporting read() and close(). """ class filebundlestore(object): """bundle store in filesystem meant for storing bundles somewhere on disk and on network filesystems """ def __init__(self, ui, repo): self.ui = ui self.repo = repo self.storepath = ui.configpath('scratchbranch', 'storepath') if not self.storepath: self.storepath = self.repo.vfs.join("scratchbranches", "filebundlestore") if not os.path.exists(self.storepath): os.makedirs(self.storepath) def _dirpath(self, hashvalue): """First two bytes of the hash are the name of the upper level directory, next two bytes are the name of the next level directory""" return os.path.join(self.storepath, hashvalue[0:2], hashvalue[2:4]) def _filepath(self, filename): return os.path.join(self._dirpath(filename), filename) def write(self, data): filename = node.hex(hashlib.sha1(data).digest()) dirpath = self._dirpath(filename) if not os.path.exists(dirpath): os.makedirs(dirpath) with open(self._filepath(filename), 'wb') as f: f.write(data) return filename def read(self, key): try: with open(self._filepath(key), 'rb') as f: return f.read() except IOError: return None class externalbundlestore(abstractbundlestore): def __init__(self, put_binary, put_args, get_binary, get_args): """ `put_binary` - path to binary file which uploads bundle to external storage and prints key to stdout `put_args` - format string with additional args to `put_binary` {filename} replacement field can be used. `get_binary` - path to binary file which accepts filename and key (in that order), downloads bundle from store and saves it to file `get_args` - format string with additional args to `get_binary`. {filename} and {handle} replacement field can be used. """ self.put_args = put_args self.get_args = get_args self.put_binary = put_binary self.get_binary = get_binary def _call_binary(self, args): p = subprocess.Popen( pycompat.rapply(procutil.tonativestr, args), stdout=subprocess.PIPE, stderr=subprocess.PIPE, close_fds=True) stdout, stderr = p.communicate() returncode = p.returncode return returncode, stdout, stderr def write(self, data): # Won't work on windows because you can't open file second time without # closing it # TODO: rewrite without str.format() and replace NamedTemporaryFile() # with pycompat.namedtempfile() with NamedTemporaryFile() as temp: temp.write(data) temp.flush() temp.seek(0) formatted_args = [arg.format(filename=temp.name) for arg in self.put_args] returncode, stdout, stderr = self._call_binary( [self.put_binary] + formatted_args) if returncode != 0: raise BundleWriteException( 'Failed to upload to external store: %s' % stderr) stdout_lines = stdout.splitlines() if len(stdout_lines) == 1: return stdout_lines[0] else: raise BundleWriteException( 'Bad output from %s: %s' % (self.put_binary, stdout)) def read(self, handle): # Won't work on windows because you can't open file second time without # closing it # TODO: rewrite without str.format() and replace NamedTemporaryFile() # with pycompat.namedtempfile() with NamedTemporaryFile() as temp: formatted_args = [arg.format(filename=temp.name, handle=handle) for arg in self.get_args] returncode, stdout, stderr = self._call_binary( [self.get_binary] + formatted_args) if returncode != 0: raise BundleReadException( 'Failed to download from external store: %s' % stderr) return temp.read()