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authorDavid Robillard <d@drobilla.net>2018-09-11 20:54:08 +0200
committerDavid Robillard <d@drobilla.net>2018-09-11 20:54:08 +0200
commitb6e9de2de9725e2f5a3170b8171ad1a1e95e8339 (patch)
treeaa8d80d8ca0d943e729e9f239229c741c5228924 /extras/distnet.py
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Squashed 'waflib/' content from commit 391d285
git-subtree-dir: waflib git-subtree-split: 391d2853c6c97efc90e466f187675e8155c866d6
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-rw-r--r--extras/distnet.py430
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diff --git a/extras/distnet.py b/extras/distnet.py
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+#! /usr/bin/env python
+# encoding: utf-8
+
+"""
+waf-powered distributed network builds, with a network cache.
+
+Caching files from a server has advantages over a NFS/Samba shared folder:
+
+- builds are much faster because they use local files
+- builds just continue to work in case of a network glitch
+- permissions are much simpler to manage
+"""
+
+import os, urllib, tarfile, re, shutil, tempfile, sys
+from collections import OrderedDict
+from waflib import Context, Utils, Logs
+
+try:
+ from urllib.parse import urlencode
+except ImportError:
+ urlencode = urllib.urlencode
+
+def safe_urlencode(data):
+ x = urlencode(data)
+ try:
+ x = x.encode('utf-8')
+ except Exception:
+ pass
+ return x
+
+try:
+ from urllib.error import URLError
+except ImportError:
+ from urllib2 import URLError
+
+try:
+ from urllib.request import Request, urlopen
+except ImportError:
+ from urllib2 import Request, urlopen
+
+DISTNETCACHE = os.environ.get('DISTNETCACHE', '/tmp/distnetcache')
+DISTNETSERVER = os.environ.get('DISTNETSERVER', 'http://localhost:8000/cgi-bin/')
+TARFORMAT = 'w:bz2'
+TIMEOUT = 60
+REQUIRES = 'requires.txt'
+
+re_com = re.compile('\s*#.*', re.M)
+
+def total_version_order(num):
+ lst = num.split('.')
+ template = '%10s' * len(lst)
+ ret = template % tuple(lst)
+ return ret
+
+def get_distnet_cache():
+ return getattr(Context.g_module, 'DISTNETCACHE', DISTNETCACHE)
+
+def get_server_url():
+ return getattr(Context.g_module, 'DISTNETSERVER', DISTNETSERVER)
+
+def get_download_url():
+ return '%s/download.py' % get_server_url()
+
+def get_upload_url():
+ return '%s/upload.py' % get_server_url()
+
+def get_resolve_url():
+ return '%s/resolve.py' % get_server_url()
+
+def send_package_name():
+ out = getattr(Context.g_module, 'out', 'build')
+ pkgfile = '%s/package_to_upload.tarfile' % out
+ return pkgfile
+
+class package(Context.Context):
+ fun = 'package'
+ cmd = 'package'
+
+ def execute(self):
+ try:
+ files = self.files
+ except AttributeError:
+ files = self.files = []
+
+ Context.Context.execute(self)
+ pkgfile = send_package_name()
+ if not pkgfile in files:
+ if not REQUIRES in files:
+ files.append(REQUIRES)
+ self.make_tarfile(pkgfile, files, add_to_package=False)
+
+ def make_tarfile(self, filename, files, **kw):
+ if kw.get('add_to_package', True):
+ self.files.append(filename)
+
+ with tarfile.open(filename, TARFORMAT) as tar:
+ endname = os.path.split(filename)[-1]
+ endname = endname.split('.')[0] + '/'
+ for x in files:
+ tarinfo = tar.gettarinfo(x, x)
+ tarinfo.uid = tarinfo.gid = 0
+ tarinfo.uname = tarinfo.gname = 'root'
+ tarinfo.size = os.stat(x).st_size
+
+ # TODO - more archive creation options?
+ if kw.get('bare', True):
+ tarinfo.name = os.path.split(x)[1]
+ else:
+ tarinfo.name = endname + x # todo, if tuple, then..
+ Logs.debug('distnet: adding %r to %s', tarinfo.name, filename)
+ with open(x, 'rb') as f:
+ tar.addfile(tarinfo, f)
+ Logs.info('Created %s', filename)
+
+class publish(Context.Context):
+ fun = 'publish'
+ cmd = 'publish'
+ def execute(self):
+ if hasattr(Context.g_module, 'publish'):
+ Context.Context.execute(self)
+ mod = Context.g_module
+
+ rfile = getattr(self, 'rfile', send_package_name())
+ if not os.path.isfile(rfile):
+ self.fatal('Create the release file with "waf release" first! %r' % rfile)
+
+ fdata = Utils.readf(rfile, m='rb')
+ data = safe_urlencode([('pkgdata', fdata), ('pkgname', mod.APPNAME), ('pkgver', mod.VERSION)])
+
+ req = Request(get_upload_url(), data)
+ response = urlopen(req, timeout=TIMEOUT)
+ data = response.read().strip()
+
+ if sys.hexversion>0x300000f:
+ data = data.decode('utf-8')
+
+ if data != 'ok':
+ self.fatal('Could not publish the package %r' % data)
+
+class constraint(object):
+ def __init__(self, line=''):
+ self.required_line = line
+ self.info = []
+
+ line = line.strip()
+ if not line:
+ return
+
+ lst = line.split(',')
+ if lst:
+ self.pkgname = lst[0]
+ self.required_version = lst[1]
+ for k in lst:
+ a, b, c = k.partition('=')
+ if a and c:
+ self.info.append((a, c))
+ def __str__(self):
+ buf = []
+ buf.append(self.pkgname)
+ buf.append(self.required_version)
+ for k in self.info:
+ buf.append('%s=%s' % k)
+ return ','.join(buf)
+
+ def __repr__(self):
+ return "requires %s-%s" % (self.pkgname, self.required_version)
+
+ def human_display(self, pkgname, pkgver):
+ return '%s-%s requires %s-%s' % (pkgname, pkgver, self.pkgname, self.required_version)
+
+ def why(self):
+ ret = []
+ for x in self.info:
+ if x[0] == 'reason':
+ ret.append(x[1])
+ return ret
+
+ def add_reason(self, reason):
+ self.info.append(('reason', reason))
+
+def parse_constraints(text):
+ assert(text is not None)
+ constraints = []
+ text = re.sub(re_com, '', text)
+ lines = text.splitlines()
+ for line in lines:
+ line = line.strip()
+ if not line:
+ continue
+ constraints.append(constraint(line))
+ return constraints
+
+def list_package_versions(cachedir, pkgname):
+ pkgdir = os.path.join(cachedir, pkgname)
+ try:
+ versions = os.listdir(pkgdir)
+ except OSError:
+ return []
+ versions.sort(key=total_version_order)
+ versions.reverse()
+ return versions
+
+class package_reader(Context.Context):
+ cmd = 'solver'
+ fun = 'solver'
+
+ def __init__(self, **kw):
+ Context.Context.__init__(self, **kw)
+
+ self.myproject = getattr(Context.g_module, 'APPNAME', 'project')
+ self.myversion = getattr(Context.g_module, 'VERSION', '1.0')
+ self.cache_constraints = {}
+ self.constraints = []
+
+ def compute_dependencies(self, filename=REQUIRES):
+ text = Utils.readf(filename)
+ data = safe_urlencode([('text', text)])
+
+ if '--offline' in sys.argv:
+ self.constraints = self.local_resolve(text)
+ else:
+ req = Request(get_resolve_url(), data)
+ try:
+ response = urlopen(req, timeout=TIMEOUT)
+ except URLError as e:
+ Logs.warn('The package server is down! %r', e)
+ self.constraints = self.local_resolve(text)
+ else:
+ ret = response.read()
+ try:
+ ret = ret.decode('utf-8')
+ except Exception:
+ pass
+ self.trace(ret)
+ self.constraints = parse_constraints(ret)
+ self.check_errors()
+
+ def check_errors(self):
+ errors = False
+ for c in self.constraints:
+ if not c.required_version:
+ errors = True
+
+ reasons = c.why()
+ if len(reasons) == 1:
+ Logs.error('%s but no matching package could be found in this repository', reasons[0])
+ else:
+ Logs.error('Conflicts on package %r:', c.pkgname)
+ for r in reasons:
+ Logs.error(' %s', r)
+ if errors:
+ self.fatal('The package requirements cannot be satisfied!')
+
+ def load_constraints(self, pkgname, pkgver, requires=REQUIRES):
+ try:
+ return self.cache_constraints[(pkgname, pkgver)]
+ except KeyError:
+ text = Utils.readf(os.path.join(get_distnet_cache(), pkgname, pkgver, requires))
+ ret = parse_constraints(text)
+ self.cache_constraints[(pkgname, pkgver)] = ret
+ return ret
+
+ def apply_constraint(self, domain, constraint):
+ vname = constraint.required_version.replace('*', '.*')
+ rev = re.compile(vname, re.M)
+ ret = [x for x in domain if rev.match(x)]
+ return ret
+
+ def trace(self, *k):
+ if getattr(self, 'debug', None):
+ Logs.error(*k)
+
+ def solve(self, packages_to_versions={}, packages_to_constraints={}, pkgname='', pkgver='', todo=[], done=[]):
+ # breadth first search
+ n_packages_to_versions = dict(packages_to_versions)
+ n_packages_to_constraints = dict(packages_to_constraints)
+
+ self.trace("calling solve with %r %r %r" % (packages_to_versions, todo, done))
+ done = done + [pkgname]
+
+ constraints = self.load_constraints(pkgname, pkgver)
+ self.trace("constraints %r" % constraints)
+
+ for k in constraints:
+ try:
+ domain = n_packages_to_versions[k.pkgname]
+ except KeyError:
+ domain = list_package_versions(get_distnet_cache(), k.pkgname)
+
+
+ self.trace("constraints?")
+ if not k.pkgname in done:
+ todo = todo + [k.pkgname]
+
+ self.trace("domain before %s -> %s, %r" % (pkgname, k.pkgname, domain))
+
+ # apply the constraint
+ domain = self.apply_constraint(domain, k)
+
+ self.trace("domain after %s -> %s, %r" % (pkgname, k.pkgname, domain))
+
+ n_packages_to_versions[k.pkgname] = domain
+
+ # then store the constraint applied
+ constraints = list(packages_to_constraints.get(k.pkgname, []))
+ constraints.append((pkgname, pkgver, k))
+ n_packages_to_constraints[k.pkgname] = constraints
+
+ if not domain:
+ self.trace("no domain while processing constraint %r from %r %r" % (domain, pkgname, pkgver))
+ return (n_packages_to_versions, n_packages_to_constraints)
+
+ # next package on the todo list
+ if not todo:
+ return (n_packages_to_versions, n_packages_to_constraints)
+
+ n_pkgname = todo[0]
+ n_pkgver = n_packages_to_versions[n_pkgname][0]
+ tmp = dict(n_packages_to_versions)
+ tmp[n_pkgname] = [n_pkgver]
+
+ self.trace("fixed point %s" % n_pkgname)
+
+ return self.solve(tmp, n_packages_to_constraints, n_pkgname, n_pkgver, todo[1:], done)
+
+ def get_results(self):
+ return '\n'.join([str(c) for c in self.constraints])
+
+ def solution_to_constraints(self, versions, constraints):
+ solution = []
+ for p in versions:
+ c = constraint()
+ solution.append(c)
+
+ c.pkgname = p
+ if versions[p]:
+ c.required_version = versions[p][0]
+ else:
+ c.required_version = ''
+ for (from_pkgname, from_pkgver, c2) in constraints.get(p, ''):
+ c.add_reason(c2.human_display(from_pkgname, from_pkgver))
+ return solution
+
+ def local_resolve(self, text):
+ self.cache_constraints[(self.myproject, self.myversion)] = parse_constraints(text)
+ p2v = OrderedDict({self.myproject: [self.myversion]})
+ (versions, constraints) = self.solve(p2v, {}, self.myproject, self.myversion, [])
+ return self.solution_to_constraints(versions, constraints)
+
+ def download_to_file(self, pkgname, pkgver, subdir, tmp):
+ data = safe_urlencode([('pkgname', pkgname), ('pkgver', pkgver), ('pkgfile', subdir)])
+ req = urlopen(get_download_url(), data, timeout=TIMEOUT)
+ with open(tmp, 'wb') as f:
+ while True:
+ buf = req.read(8192)
+ if not buf:
+ break
+ f.write(buf)
+
+ def extract_tar(self, subdir, pkgdir, tmpfile):
+ with tarfile.open(tmpfile) as f:
+ temp = tempfile.mkdtemp(dir=pkgdir)
+ try:
+ f.extractall(temp)
+ os.rename(temp, os.path.join(pkgdir, subdir))
+ finally:
+ try:
+ shutil.rmtree(temp)
+ except Exception:
+ pass
+
+ def get_pkg_dir(self, pkgname, pkgver, subdir):
+ pkgdir = os.path.join(get_distnet_cache(), pkgname, pkgver)
+ if not os.path.isdir(pkgdir):
+ os.makedirs(pkgdir)
+
+ target = os.path.join(pkgdir, subdir)
+
+ if os.path.exists(target):
+ return target
+
+ (fd, tmp) = tempfile.mkstemp(dir=pkgdir)
+ try:
+ os.close(fd)
+ self.download_to_file(pkgname, pkgver, subdir, tmp)
+ if subdir == REQUIRES:
+ os.rename(tmp, target)
+ else:
+ self.extract_tar(subdir, pkgdir, tmp)
+ finally:
+ try:
+ os.remove(tmp)
+ except OSError:
+ pass
+
+ return target
+
+ def __iter__(self):
+ if not self.constraints:
+ self.compute_dependencies()
+ for x in self.constraints:
+ if x.pkgname == self.myproject:
+ continue
+ yield x
+
+ def execute(self):
+ self.compute_dependencies()
+
+packages = package_reader()
+
+def load_tools(ctx, extra):
+ global packages
+ for c in packages:
+ packages.get_pkg_dir(c.pkgname, c.required_version, extra)
+ noarchdir = packages.get_pkg_dir(c.pkgname, c.required_version, 'noarch')
+ for x in os.listdir(noarchdir):
+ if x.startswith('waf_') and x.endswith('.py'):
+ ctx.load([x.rstrip('.py')], tooldir=[noarchdir])
+
+def options(opt):
+ opt.add_option('--offline', action='store_true')
+ packages.execute()
+ load_tools(opt, REQUIRES)
+
+def configure(conf):
+ load_tools(conf, conf.variant)
+
+def build(bld):
+ load_tools(bld, bld.variant)
+