mirror of
https://gitlab.com/ita1024/waf.git
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328 lines
9.6 KiB
Python
328 lines
9.6 KiB
Python
#!/usr/bin/env python
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# encoding: utf-8
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# Remote Builds tool using rsync+ssh
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__author__ = "Jérôme Carretero <cJ-waf@zougloub.eu>"
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__copyright__ = "Jérôme Carretero, 2013"
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"""
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Simple Remote Builds
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********************
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This tool is an *experimental* tool (meaning, do not even try to pollute
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the waf bug tracker with bugs in here, contact me directly) providing simple
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remote builds.
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It uses rsync and ssh to perform the remote builds.
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It is intended for performing cross-compilation on platforms where
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a cross-compiler is either unavailable (eg. MacOS, QNX) a specific product
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does not exist (eg. Windows builds using Visual Studio) or simply not installed.
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This tool sends the sources and the waf script to the remote host,
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and commands the usual waf execution.
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There are alternatives to using this tool, such as setting up shared folders,
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logging on to remote machines, and building on the shared folders.
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Electing one method or another depends on the size of the program.
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Usage
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=====
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1. Set your wscript file so it includes a list of variants,
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e.g.::
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from waflib import Utils
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top = '.'
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out = 'build'
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variants = [
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'linux_64_debug',
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'linux_64_release',
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'linux_32_debug',
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'linux_32_release',
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]
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from waflib.extras import remote
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def options(opt):
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# normal stuff from here on
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opt.load('compiler_c')
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def configure(conf):
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if not conf.variant:
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return
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# normal stuff from here on
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conf.load('compiler_c')
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def build(bld):
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if not bld.variant:
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return
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# normal stuff from here on
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bld(features='c cprogram', target='app', source='main.c')
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2. Build the waf file, so it includes this tool, and put it in the current
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directory
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.. code:: bash
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./waf-light --tools=remote
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3. Set the host names to access the hosts:
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.. code:: bash
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export REMOTE_QNX=user@kiunix
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4. Setup the ssh server and ssh keys
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The ssh key should not be protected by a password, or it will prompt for it every time.
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Create the key on the client:
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.. code:: bash
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ssh-keygen -t rsa -f foo.rsa
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Then copy foo.rsa.pub to the remote machine (user@kiunix:/home/user/.ssh/authorized_keys),
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and make sure the permissions are correct (chmod go-w ~ ~/.ssh ~/.ssh/authorized_keys)
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A separate key for the build processes can be set in the environment variable WAF_SSH_KEY.
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The tool will then use 'ssh-keyscan' to avoid prompting for remote hosts, so
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be warned to use this feature on internal networks only (MITM).
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.. code:: bash
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export WAF_SSH_KEY=~/foo.rsa
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5. Perform the build:
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.. code:: bash
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waf configure_all build_all --remote
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"""
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import getpass, os, re, sys
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from collections import OrderedDict
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from waflib import Context, Options, Utils, ConfigSet
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from waflib.Build import BuildContext, CleanContext, InstallContext, UninstallContext
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from waflib.Configure import ConfigurationContext
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is_remote = False
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if '--remote' in sys.argv:
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is_remote = True
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sys.argv.remove('--remote')
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class init(Context.Context):
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"""
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Generates the *_all commands
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"""
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cmd = 'init'
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fun = 'init'
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def execute(self):
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for x in list(Context.g_module.variants):
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self.make_variant(x)
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lst = ['remote']
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for k in Options.commands:
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if k.endswith('_all'):
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name = k.replace('_all', '')
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for x in Context.g_module.variants:
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lst.append('%s_%s' % (name, x))
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else:
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lst.append(k)
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del Options.commands[:]
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Options.commands += lst
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def make_variant(self, x):
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for y in (BuildContext, CleanContext, InstallContext, UninstallContext):
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name = y.__name__.replace('Context','').lower()
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class tmp(y):
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cmd = name + '_' + x
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fun = 'build'
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variant = x
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class tmp(ConfigurationContext):
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cmd = 'configure_' + x
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fun = 'configure'
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variant = x
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def __init__(self, **kw):
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ConfigurationContext.__init__(self, **kw)
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self.setenv(x)
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class remote(BuildContext):
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cmd = 'remote'
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fun = 'build'
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def get_ssh_hosts(self):
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lst = []
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for v in Context.g_module.variants:
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self.env.HOST = self.login_to_host(self.variant_to_login(v))
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cmd = Utils.subst_vars('${SSH_KEYSCAN} -t rsa,ecdsa ${HOST}', self.env)
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out, err = self.cmd_and_log(cmd, output=Context.BOTH, quiet=Context.BOTH)
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lst.append(out.strip())
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return lst
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def setup_private_ssh_key(self):
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"""
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When WAF_SSH_KEY points to a private key, a .ssh directory will be created in the build directory
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Make sure that the ssh key does not prompt for a password
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"""
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key = os.environ.get('WAF_SSH_KEY', '')
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if not key:
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return
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if not os.path.isfile(key):
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self.fatal('Key in WAF_SSH_KEY must point to a valid file')
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self.ssh_dir = os.path.join(self.path.abspath(), 'build', '.ssh')
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self.ssh_hosts = os.path.join(self.ssh_dir, 'known_hosts')
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self.ssh_key = os.path.join(self.ssh_dir, os.path.basename(key))
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self.ssh_config = os.path.join(self.ssh_dir, 'config')
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for x in self.ssh_hosts, self.ssh_key, self.ssh_config:
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if not os.path.isfile(x):
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if not os.path.isdir(self.ssh_dir):
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os.makedirs(self.ssh_dir)
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Utils.writef(self.ssh_key, Utils.readf(key), 'wb')
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os.chmod(self.ssh_key, 448)
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Utils.writef(self.ssh_hosts, '\n'.join(self.get_ssh_hosts()))
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os.chmod(self.ssh_key, 448)
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Utils.writef(self.ssh_config, 'UserKnownHostsFile %s' % self.ssh_hosts, 'wb')
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os.chmod(self.ssh_config, 448)
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self.env.SSH_OPTS = ['-F', self.ssh_config, '-i', self.ssh_key]
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self.env.append_value('RSYNC_SEND_OPTS', '--exclude=build/.ssh')
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def skip_unbuildable_variant(self):
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# skip variants that cannot be built on this OS
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for k in Options.commands:
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a, _, b = k.partition('_')
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if b in Context.g_module.variants:
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c, _, _ = b.partition('_')
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if c != Utils.unversioned_sys_platform():
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Options.commands.remove(k)
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def login_to_host(self, login):
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return re.sub(r'(\w+@)', '', login)
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def variant_to_login(self, variant):
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"""linux_32_debug -> search env.LINUX_32 and then env.LINUX"""
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x = variant[:variant.rfind('_')]
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ret = os.environ.get('REMOTE_' + x.upper(), '')
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if not ret:
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x = x[:x.find('_')]
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ret = os.environ.get('REMOTE_' + x.upper(), '')
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if not ret:
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ret = '%s@localhost' % getpass.getuser()
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return ret
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def execute(self):
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global is_remote
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if not is_remote:
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self.skip_unbuildable_variant()
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else:
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BuildContext.execute(self)
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def restore(self):
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self.top_dir = os.path.abspath(Context.g_module.top)
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self.srcnode = self.root.find_node(self.top_dir)
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self.path = self.srcnode
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self.out_dir = os.path.join(self.top_dir, Context.g_module.out)
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self.bldnode = self.root.make_node(self.out_dir)
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self.bldnode.mkdir()
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self.env = ConfigSet.ConfigSet()
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def extract_groups_of_builds(self):
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"""Return a dict mapping each variants to the commands to build"""
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self.vgroups = {}
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for x in reversed(Options.commands):
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_, _, variant = x.partition('_')
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if variant in Context.g_module.variants:
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try:
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dct = self.vgroups[variant]
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except KeyError:
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dct = self.vgroups[variant] = OrderedDict()
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try:
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dct[variant].append(x)
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except KeyError:
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dct[variant] = [x]
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Options.commands.remove(x)
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def custom_options(self, login):
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try:
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return Context.g_module.host_options[login]
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except (AttributeError, KeyError):
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return {}
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def recurse(self, *k, **kw):
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self.env.RSYNC = getattr(Context.g_module, 'rsync', 'rsync -a --chmod=u+rwx')
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self.env.SSH = getattr(Context.g_module, 'ssh', 'ssh')
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self.env.SSH_KEYSCAN = getattr(Context.g_module, 'ssh_keyscan', 'ssh-keyscan')
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try:
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self.env.WAF = getattr(Context.g_module, 'waf')
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except AttributeError:
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try:
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os.stat('waf')
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except KeyError:
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self.fatal('Put a waf file in the directory (./waf-light --tools=remote)')
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else:
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self.env.WAF = './waf'
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self.extract_groups_of_builds()
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self.setup_private_ssh_key()
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for k, v in self.vgroups.items():
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task = self(rule=rsync_and_ssh, always=True)
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task.env.login = self.variant_to_login(k)
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task.env.commands = []
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for opt, value in v.items():
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task.env.commands += value
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task.env.variant = task.env.commands[0].partition('_')[2]
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for opt, value in self.custom_options(k):
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task.env[opt] = value
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self.jobs = len(self.vgroups)
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def make_mkdir_command(self, task):
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return Utils.subst_vars('${SSH} ${SSH_OPTS} ${login} "rm -fr ${remote_dir} && mkdir -p ${remote_dir}"', task.env)
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def make_send_command(self, task):
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return Utils.subst_vars('${RSYNC} ${RSYNC_SEND_OPTS} -e "${SSH} ${SSH_OPTS}" ${local_dir} ${login}:${remote_dir}', task.env)
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def make_exec_command(self, task):
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txt = '''${SSH} ${SSH_OPTS} ${login} "cd ${remote_dir} && ${WAF} ${commands}"'''
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return Utils.subst_vars(txt, task.env)
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def make_save_command(self, task):
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return Utils.subst_vars('${RSYNC} ${RSYNC_SAVE_OPTS} -e "${SSH} ${SSH_OPTS}" ${login}:${remote_dir_variant} ${build_dir}', task.env)
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def rsync_and_ssh(task):
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# remove a warning
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task.uid_ = id(task)
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bld = task.generator.bld
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task.env.user, _, _ = task.env.login.partition('@')
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task.env.hdir = Utils.to_hex(Utils.h_list((task.generator.path.abspath(), task.env.variant)))
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task.env.remote_dir = '~%s/wafremote/%s' % (task.env.user, task.env.hdir)
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task.env.local_dir = bld.srcnode.abspath() + '/'
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task.env.remote_dir_variant = '%s/%s/%s' % (task.env.remote_dir, Context.g_module.out, task.env.variant)
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task.env.build_dir = bld.bldnode.abspath()
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ret = task.exec_command(bld.make_mkdir_command(task))
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if ret:
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return ret
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ret = task.exec_command(bld.make_send_command(task))
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if ret:
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return ret
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ret = task.exec_command(bld.make_exec_command(task))
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if ret:
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return ret
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ret = task.exec_command(bld.make_save_command(task))
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if ret:
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return ret
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