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# Copyright (C) 2011-2013 Codethink Limited
#
# 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; version 2 of the License.
#
# 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 re
import morphlib
'''Utility functions for morph.'''
# It is intentional that if collections does not have OrderedDict that
# simplejson is also used in preference to json, as OrderedDict became
# a member of collections in the same release json got its object_pairs_hook
try: # pragma: no cover
from collections import OrderedDict
import json
except ImportError: # pragma: no cover
from ordereddict import OrderedDict
import simplejson as json
try:
from multiprocessing import cpu_count
except NotImplementedError: # pragma: no cover
cpu_count = lambda: 1
import os
def arch():
'''Return the CPU architecture of the current host.'''
return os.uname()[4]
def indent(string, spaces=4):
'''Return ``string`` indented by ``spaces`` spaces.
The final line is not terminated by a newline. This makes it easy
to use this function for indenting long text for logging: the
logging library adds a newline, so not including it in the indented
text avoids a spurious empty line in the log file.
This also makes the result be a plain ASCII encoded string.
'''
if type(string) == unicode: # pragma: no cover
string = string.decode('utf-8')
lines = string.splitlines()
lines = ['%*s%s' % (spaces, '', line) for line in lines]
return '\n'.join(lines)
def make_concurrency(cores=None):
'''Return the number of concurrent jobs for make.
This will be given to make as the -j argument.
'''
n = cpu_count() if cores is None else cores
# Experimental results (ref. Kinnison) says a factor of 1.5
# gives about the optimal result for build times, since much of
# builds are I/O bound, not CPU bound.
return max(int(n * 1.5 + 0.5), 1)
def create_cachedir(settings): # pragma: no cover
'''Return cache directory, creating it if necessary.'''
cachedir = settings['cachedir']
if not os.path.exists(cachedir):
os.mkdir(cachedir)
return cachedir
def new_artifact_caches(settings): # pragma: no cover
'''Create new objects for local and remote artifact caches.
This includes creating the directories on disk, if missing.
'''
cachedir = create_cachedir(settings)
artifact_cachedir = os.path.join(cachedir, 'artifacts')
if not os.path.exists(artifact_cachedir):
os.mkdir(artifact_cachedir)
lac = morphlib.localartifactcache.LocalArtifactCache(artifact_cachedir)
rac_url = settings['cache-server']
if rac_url:
rac = morphlib.remoteartifactcache.RemoteArtifactCache(rac_url)
else:
rac = None
return lac, rac
def combine_aliases(app): # pragma: no cover
'''Create a full repo-alias set from the app's settings.'''
trove_host = app.settings['trove-host']
trove_prefixes = app.settings['trove-prefix']
repo_aliases = app.settings['repo-alias']
repo_pat = r'^(?P<prefix>[a-z0-9]+)=(?P<pull>[^#]+)#(?P<push>[^#]+)$'
trove_pat = (r'^(?P<prefix>[a-z0-9]+)=(?P<path>[^#]+)#'
'(?P<pull>[^#]+)#(?P<push>[^#]+)$')
alias_map = {}
def _expand(protocol, path):
if protocol == "git":
return "git://%s/%s/%%s" % (trove_host, path)
elif protocol == "ssh":
return "ssh://git@%s/%s/%%s" % (trove_host, path)
else:
raise cliapp.AppException(
'Unknown protocol in trove_prefix: %s' % protocol)
if trove_host:
alias_map['baserock'] = "baserock=%s#%s" % (
_expand('git', 'baserock'),
_expand('ssh', 'baserock'))
alias_map['upstream'] = "upstream=%s#%s" % (
_expand('git', 'delta'),
_expand('ssh', 'delta'))
for trove_prefix in trove_prefixes:
m = re.match(trove_pat, trove_prefix)
if m:
alias_map[m.group('prefix')] = "%s=%s#%s" % (
m.group('prefix'),
_expand(m.group('pull'), m.group('path')),
_expand(m.group('push'), m.group('path')))
elif '=' not in trove_prefix:
alias_map[trove_prefix] = "%s=%s#%s" % (
trove_prefix,
_expand('ssh', trove_prefix),
_expand('ssh', trove_prefix))
for repo_alias in repo_aliases:
m = re.match(repo_pat, repo_alias)
if m:
alias_map[m.group('prefix')] = repo_alias
return alias_map.values()
def new_repo_caches(app): # pragma: no cover
'''Create new objects for local, remote git repository caches.'''
aliases = app.settings['repo-alias']
cachedir = create_cachedir(app.settings)
gits_dir = os.path.join(cachedir, 'gits')
tarball_base_url = app.settings['tarball-server']
repo_resolver = morphlib.repoaliasresolver.RepoAliasResolver(aliases)
lrc = morphlib.localrepocache.LocalRepoCache(
app, gits_dir, repo_resolver, tarball_base_url=tarball_base_url)
url = app.settings['cache-server']
if url:
rrc = morphlib.remoterepocache.RemoteRepoCache(url, repo_resolver)
else:
rrc = None
return lrc, rrc
# This acquired from rdiff-backup which is GPLv2+ and a patch from 2011
# which has not yet been merged, combined with a tad of tidying from us.
def copyfileobj(inputfp, outputfp, blocksize=1024*1024): # pragma: no cover
"""Copies file inputfp to outputfp in blocksize intervals"""
sparse = False
buf = None
while 1:
inbuf = inputfp.read(blocksize)
if not inbuf: break
if not buf:
buf = inbuf
else:
buf += inbuf
# Combine "short" reads
if (len(buf) < blocksize):
continue
buflen = len(buf)
if buf == "\x00" * buflen:
outputfp.seek(buflen, os.SEEK_CUR)
buf = None
# flag sparse=True, that we seek()ed, but have not written yet
# The filesize is wrong until we write
sparse = True
else:
outputfp.write(buf)
buf = None
# We wrote, so clear sparse.
sparse = False
if buf:
outputfp.write(buf)
elif sparse:
outputfp.seek(-1, os.SEEK_CUR)
outputfp.write("\x00")
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