Mercurial > hg
view hgext/infinitepush/store.py @ 45551:4c8d9b53b1c7
chg: make is possible to call by default an hg binary located next to chg
When a single version of hg is in use and it's in the PATH, using chg
is just a matter of calling chg.
But when there are multiple installations of hg+chg around, and hg is
referred to with an absolute path, using chg is more annoying because
it requires both changing the invocation to hg to use chg, but also
setting CHGHG.
Currently, we set HGPATH when we build chg to remove the need to set
CHGHG in the previous paragraph. But that means chg now hardcodes its
installation path, which makes the installation not relocatable. Hence
this proposal to make chg find ./hg relative to itself (as opposed to
CHGHG=./hg which find hg relative to cwd).
This only works on linux as written, but since it's opt-in, it sounds
fine.
Tested by hand, as I'm not sure how else to test this.
Differential Revision: https://phab.mercurial-scm.org/D9006
author | Valentin Gatien-Baron <vgatien-baron@janestreet.com> |
---|---|
date | Thu, 03 Sep 2020 11:07:47 -0400 |
parents | bfc6e75c0114 |
children | 59fa3890d40a |
line wrap: on
line source
# 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 os import subprocess from mercurial.pycompat import open from mercurial import ( node, pycompat, ) from mercurial.utils import ( hashutil, procutil, ) class BundleWriteException(Exception): pass class BundleReadException(Exception): pass class abstractbundlestore(object): # pytype: disable=ignored-metaclass """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(b'scratchbranch', b'storepath') if not self.storepath: self.storepath = self.repo.vfs.join( b"scratchbranches", b"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(hashutil.sha1(data).digest()) dirpath = self._dirpath(filename) if not os.path.exists(dirpath): os.makedirs(dirpath) with open(self._filepath(filename), b'wb') as f: f.write(data) return filename def read(self, key): try: with open(self._filepath(key), b'rb') as f: return f.read() except IOError: return None def format_placeholders_args(args, filename=None, handle=None): """Formats `args` with Infinitepush replacements. Hack to get `str.format()`-ed strings working in a BC way with bytes. """ formatted_args = [] for arg in args: if filename and arg == b'{filename}': formatted_args.append(filename) elif handle and arg == b'{handle}': formatted_args.append(handle) else: formatted_args.append(arg) return formatted_args 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 pycompat.namedtempfile() as temp: temp.write(data) temp.flush() temp.seek(0) formatted_args = format_placeholders_args( self.put_args, filename=temp.name ) returncode, stdout, stderr = self._call_binary( [self.put_binary] + formatted_args ) if returncode != 0: raise BundleWriteException( b'Failed to upload to external store: %s' % stderr ) stdout_lines = stdout.splitlines() if len(stdout_lines) == 1: return stdout_lines[0] else: raise BundleWriteException( b'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 with pycompat.namedtempfile() as temp: formatted_args = format_placeholders_args( self.get_args, filename=temp.name, handle=handle ) returncode, stdout, stderr = self._call_binary( [self.get_binary] + formatted_args ) if returncode != 0: raise BundleReadException( b'Failed to download from external store: %s' % stderr ) return temp.read()