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|
# Copyright (C) 2011-2012 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 collections
import json
import logging
import os
import shutil
import time
import morphlib
def ldconfig(ex, rootdir): # pragma: no cover
'''Run ldconfig for the filesystem below ``rootdir``.
Essentially, ``rootdir`` specifies the root of a new system.
Only directories below it are considered.
``etc/ld.so.conf`` below ``rootdir`` is assumed to exist and
be populated by the right directories, and should assume
the root directory is ``rootdir``. Example: if ``rootdir``
is ``/tmp/foo``, then ``/tmp/foo/etc/ld.so.conf`` should
contain ``/lib``, not ``/tmp/foo/lib``.
The ldconfig found via ``$PATH`` is used, not the one in ``rootdir``,
since in bootstrap mode that might not yet exist, the various
implementations should be compatible enough.
'''
conf = os.path.join(rootdir, 'etc', 'ld.so.conf')
if os.path.exists(conf):
logging.debug('Running ldconfig for %s' % rootdir)
cache = os.path.join(rootdir, 'etc', 'ld.so.cache')
# The following trickery with $PATH is necessary during the Baserock
# bootstrap build: we are not guaranteed that PATH contains the
# directory (/sbin conventionally) that ldconfig is in. Then again,
# it might, and if so, we don't want to hardware a particular
# location. So we add the possible locations to the end of $PATH
# and restore that aftewards.
old_path = ex.env['PATH']
ex.env['PATH'] = '%s:/sbin:/usr/sbin:/usr/local/sbin' % old_path
ex.runv(['ldconfig', '-r', rootdir])
ex.env['PATH'] = old_path
else:
logging.debug('No %s, not running ldconfig' % conf)
class Factory(object):
'''Build Baserock binaries.'''
def __init__(self, tempdir):
self._tempdir = tempdir
self.staging = None
def create_staging(self):
'''Create the staging area.'''
self.staging = self._tempdir.join('staging')
os.mkdir(self.staging)
def remove_staging(self):
'''Remove the staging area.'''
shutil.rmtree(self.staging)
self.staging = None
def _unpack_binary(self, binary, dirname):
'''Unpack binary into a given directory.'''
ex = morphlib.execute.Execute('/', logging.debug)
morphlib.bins.unpack_binary(binary, dirname, ex)
def unpack_binary_from_file(self, filename):
'''Unpack a binary package from a file, given its name.'''
self._unpack_binary(filename, self.staging)
def unpack_binary_from_file_onto_system(self, filename):
'''Unpack contents of a binary package onto the running system.
DANGER, WILL ROBINSON! This WILL modify your running system.
It should only be used during bootstrapping.
'''
self._unpack_binary(filename, '/')
def unpack_sources(self, treeish, srcdir):
'''Get sources from to a source directory, for building.
The git repository and revision are given via a Treeish object.
The source directory must not exist.
'''
def msg(s):
pass
def extract_treeish(treeish, destdir):
logging.debug('Extracting %s into %s' % (treeish.repo, destdir))
if not os.path.exists(destdir):
os.mkdir(destdir)
morphlib.git.copy_repository(treeish, destdir, msg)
morphlib.git.checkout_ref(destdir, treeish.ref, msg)
return [(sub.treeish, os.path.join(destdir, sub.path))
for sub in treeish.submodules]
todo = [(treeish, srcdir)]
while todo:
treeish, srcdir = todo.pop()
todo += extract_treeish(treeish, srcdir)
self.set_mtime_recursively(srcdir)
def set_mtime_recursively(self, root):
'''Set the mtime for every file in a directory tree to the same.
We do this because git checkout does not set the mtime to anything,
and some projects (binutils, gperf for example) include formatted
documentation and try to randomly build things or not because of
the timestamps. This should help us get more reliable builds.
'''
now = time.time()
for dirname, subdirs, basenames in os.walk(root, topdown=False):
for basename in basenames:
pathname = os.path.join(dirname, basename)
os.utime(pathname, (now, now))
os.utime(dirname, (now, now))
class BlobBuilder(object): # pragma: no cover
def __init__(self, app, blob):
self.app = app
self.blob = blob
# The following MUST get set by the caller.
self.builddir = None
self.destdir = None
self.settings = None
self.real_msg = None
self.cachedir = None
self.cache_key = None
self.tempdir = None
self.factory = None
self.logfile = None
self.stage_items = []
self.dump_memory_profile = lambda msg: None
# Stopwatch to measure build times
self.build_watch = morphlib.stopwatch.Stopwatch()
def msg(self, text):
self.real_msg(text)
if self.logfile and not self.logfile.closed:
self.logfile.write('%s\n' % text)
def builds(self):
raise NotImplemented()
def build(self):
self.prepare_logfile()
with self.build_watch('overall-build'):
self.do_build()
self.save_build_times()
self.save_logfile()
builds = self.builds()
return builds.items()
def filename(self, name):
return '%s.%s.%s' % (self.cachedir.name(self.cache_key),
self.blob.morph.kind,
name)
def prepare_binary_metadata(self, blob_name, **kwargs):
'''Add metadata to a binary about to be built.'''
self.msg('Adding metadata to %s' % blob_name)
meta = {
'name': blob_name,
'kind': self.blob.morph.kind,
'description': self.blob.morph.description,
}
for key, value in kwargs.iteritems():
meta[key] = value
dirname = os.path.join(self.destdir, 'baserock')
if not os.path.exists(dirname):
os.mkdir(dirname)
filename = os.path.join(dirname, '%s.meta' % blob_name)
with open(filename, 'w') as f:
json.dump(meta, f, indent=4)
f.write('\n')
def write_cache_metadata(self, meta):
self.msg('Writing metadata to the cache')
with self.cachedir.open(self.cache_key, suffix='.meta') as f:
json.dump(meta, f, indent=4)
f.write('\n')
def save_build_times(self):
meta = {
'build-times': {}
}
for stage in self.build_watch.ticks.iterkeys():
meta['build-times'][stage] = {
'start': '%s' % self.build_watch.start_time(stage),
'stop': '%s' % self.build_watch.stop_time(stage),
'delta': '%.4f' % self.build_watch.start_stop_seconds(stage)
}
self.write_cache_metadata(meta)
def prepare_logfile(self):
self.logfile = self.cachedir.open(self.cache_key, suffix='.log',
mode='w+', buffering=0)
def save_logfile(self):
self.logfile.close()
class ChunkBuilder(BlobBuilder): # pragma: no cover
build_system = {
'dummy': {
'configure-commands': [
'echo dummy configure',
],
'build-commands': [
'echo dummy build',
],
'test-commands': [
'echo dummy test',
],
'install-commands': [
'echo dummy install',
],
},
'autotools': {
'configure-commands': [
'if [ -e autogen.sh ]; then ./autogen.sh; ' +
'elif [ ! -e ./configure ]; then autoreconf -ivf; fi',
'./configure --prefix=/usr',
],
'build-commands': [
'make',
],
'test-commands': [
],
'install-commands': [
'make DESTDIR="$DESTDIR" install',
],
},
}
def builds(self):
ret = {}
for chunk_name in self.blob.chunks:
ret[chunk_name] = self.filename(chunk_name)
return ret
def do_build(self):
self.msg('Creating build tree at %s' % self.builddir)
self.ex = morphlib.execute.Execute(self.builddir, self.msg)
self.setup_env()
self.prepare_build_directory()
os.mkdir(self.destdir)
self.build_with_system_or_commands()
self.dump_memory_profile('after building chunk')
chunks = self.create_chunks()
self.dump_memory_profile('after creating build chunks')
# install all built items to the staging area
for name, filename in chunks:
self.msg('Fetching cached %s %s from %s' %
(self.blob.morph.kind, name, filename))
self.install_chunk(name, filename)
self.dump_memory_profile('after installing chunk')
return chunks
def install_chunk(self, chunk_name, chunk_filename):
ex = morphlib.execute.Execute('/', self.msg)
if self.settings['bootstrap']:
self.msg('Unpacking item %s onto system' % chunk_name)
self.factory.unpack_binary_from_file_onto_system(chunk_filename)
ldconfig(ex, '/')
else:
self.msg('Unpacking chunk %s into staging' % chunk_name)
self.factory.unpack_binary_from_file(chunk_filename)
ldconfig(ex, self.factory.staging)
def setup_env(self):
path = self.ex.env['PATH']
tools = self.ex.env.get('BOOTSTRAP_TOOLS')
distcc_hosts = self.ex.env.get('DISTCC_HOSTS')
# copy a set of white-listed variables from the original env
copied_vars = dict.fromkeys([
'TMPDIR',
'LD_PRELOAD',
'LD_LIBRARY_PATH',
'FAKEROOTKEY',
'FAKED_MODE',
'FAKEROOT_FD_BASE',
])
for name in copied_vars:
copied_vars[name] = self.ex.env.get(name, None)
self.ex.env.clear()
# apply the copied variables to the clean env
for name in copied_vars:
if copied_vars[name] is not None:
self.ex.env[name] = copied_vars[name]
self.ex.env['TERM'] = 'dumb'
self.ex.env['SHELL'] = '/bin/sh'
self.ex.env['USER'] = \
self.ex.env['USERNAME'] = \
self.ex.env['LOGNAME'] = 'tomjon'
self.ex.env['LC_ALL'] = 'C'
self.ex.env['HOME'] = os.path.join(self.tempdir.dirname)
if self.settings['keep-path'] or self.settings['bootstrap']:
self.ex.env['PATH'] = path
else:
bindirs = ['bin']
path = ':'.join(os.path.join(self.tempdir.dirname, x)
for x in bindirs)
self.ex.env['PATH'] = path
self.ex.env['WORKAREA'] = self.tempdir.dirname
self.ex.env['DESTDIR'] = self.destdir + '/'
self.ex.env['TOOLCHAIN_TARGET'] = \
'%s-baserock-linux-gnu' % os.uname()[4]
self.ex.env['BOOTSTRAP'] = \
'true' if self.settings['bootstrap'] else 'false'
if tools is not None:
self.ex.env['BOOTSTRAP_TOOLS'] = tools
if distcc_hosts is not None:
self.ex.env['DISTCC_HOSTS'] = distcc_hosts
if self.blob.morph.max_jobs:
max_jobs = int(self.blob.morph.max_jobs)
logging.debug('max_jobs from morph: %s' % max_jobs)
else:
max_jobs = self.settings['max-jobs']
logging.debug('max_jobs from settings: %s' % max_jobs)
self.ex.env['MAKEFLAGS'] = '-j%d' % max_jobs
if not self.settings['no-ccache']:
self.ex.env['PATH'] = ('/usr/lib/ccache:%s' %
self.ex.env['PATH'])
self.ex.env['CCACHE_BASEDIR'] = self.tempdir.dirname
if not self.settings['no-distcc']:
self.ex.env['CCACHE_PREFIX'] = 'distcc'
logging.debug('Environment for building chunk:')
for key in sorted(self.ex.env):
logging.debug(' %s=%s' % (key, self.ex.env[key]))
def prepare_build_directory(self):
self.factory.unpack_sources(self.blob.morph.treeish, self.builddir)
def build_with_system_or_commands(self):
'''Run explicit commands or commands from build system.
Use explicit commands, if given, and build system commands if one
has been specified.
'''
bs_name = self.blob.morph.build_system
if bs_name:
bs = self.build_system[bs_name]
else:
bs = {}
def run_them(runner, what):
key = '%s-commands' % what
attr = '%s_commands' % what
cmds = bs.get(key, [])
cmds = getattr(self.blob.morph, attr, []) or cmds
runner(what, cmds)
run_them(self.run_sequentially, 'configure')
run_them(self.run_in_parallel, 'build')
run_them(self.run_sequentially, 'test')
run_them(self.run_sequentially, 'install')
def run_in_parallel(self, what, commands):
self.msg('commands: %s' % what)
with self.build_watch(what):
self.run_commands(commands)
def run_sequentially(self, what, commands):
self.msg ('commands: %s' % what)
with self.build_watch(what):
flags = self.ex.env['MAKEFLAGS']
self.ex.env['MAKEFLAGS'] = '-j1'
logging.debug('Setting MAKEFLAGS=%s' % self.ex.env['MAKEFLAGS'])
self.run_commands(commands)
self.ex.env['MAKEFLAGS'] = flags
logging.debug('Restore MAKEFLAGS=%s' % self.ex.env['MAKEFLAGS'])
def run_commands(self, commands):
if self.settings['staging-chroot']:
ex = morphlib.execute.Execute(self.factory.staging, self.msg)
ex.env.clear()
for key in self.ex.env:
ex.env[key] = self.ex.env[key]
assert self.builddir.startswith(self.factory.staging + '/')
assert self.destdir.startswith(self.factory.staging + '/')
builddir = self.builddir[len(self.factory.staging):]
destdir = self.destdir[len(self.factory.staging):]
for cmd in commands:
old_destdir = ex.env.get('DESTDIR', None)
ex.env['DESTDIR'] = destdir
ex.runv(['/usr/sbin/chroot', self.factory.staging, 'sh', '-c',
'cd "$1" && shift && eval "$@"', '--', builddir, cmd])
if old_destdir is None:
del ex.env['DESTDIR']
else:
ex.env['DESTDIR'] = old_destdir
else:
self.ex.run(commands)
def create_chunks(self):
chunks = []
with self.build_watch('create-chunks'):
for chunk_name in self.blob.chunks:
self.msg('Creating chunk %s' % chunk_name)
self.prepare_binary_metadata(chunk_name)
patterns = self.blob.chunks[chunk_name]
patterns += [r'baserock/%s\.' % chunk_name]
filename = self.filename(chunk_name)
basename = os.path.basename(filename)
self.msg('Creating binary for %s' % chunk_name)
with self.cachedir.open(filename) as f:
morphlib.bins.create_chunk(self.destdir, f, patterns,
self.ex,
self.dump_memory_profile)
chunks.append((chunk_name, filename))
files = os.listdir(self.destdir)
if files:
raise Exception('DESTDIR %s is not empty: %s' %
(self.destdir, files))
return chunks
class StratumBuilder(BlobBuilder): # pragma: no cover
def builds(self):
filename = self.filename(self.blob.morph.name)
return { self.blob.morph.name: filename }
def do_build(self):
os.mkdir(self.destdir)
ex = morphlib.execute.Execute(self.destdir, self.msg)
with self.build_watch('unpack-chunks'):
for chunk_name, filename in self.stage_items:
self.msg('Unpacking chunk %s' % chunk_name)
morphlib.bins.unpack_binary(filename, self.destdir, ex)
with self.build_watch('create-binary'):
self.prepare_binary_metadata(self.blob.morph.name)
self.msg('Creating binary for %s' % self.blob.morph.name)
filename = self.filename(self.blob.morph.name)
basename = os.path.basename(filename)
with self.cachedir.open(basename) as f:
morphlib.bins.create_stratum(self.destdir, f, ex)
return { self.blob.morph.name: filename }
class SystemBuilder(BlobBuilder): # pragma: no cover
def builds(self):
return {}
def do_build(self):
self.ex = morphlib.execute.Execute(self.tempdir.dirname, self.msg)
image_name = self.tempdir.join('%s.img' % self.blob.morph.name)
self._create_image(image_name)
self._partition_image(image_name)
self._install_mbr(image_name)
partition = self._setup_device_mapping(image_name)
mount_point = None
try:
self._create_fs(partition)
mount_point = self.tempdir.join('mnt')
self._mount(partition, mount_point)
self._unpack_strata(mount_point)
self._create_fstab(mount_point)
self._install_extlinux(mount_point)
self._unmount(mount_point)
except BaseException:
self._umount(mount_point)
self._undo_device_mapping(image_name)
raise
self._undo_device_mapping(image_name)
self._move_image_to_cache(image_name)
return { self.blob.morph.name: filename }
def _create_image(self, image_name):
with self.build_watch('create-image'):
self.ex.runv(['qemu-img', 'create', '-f', 'raw', image_name,
self.blob.morph.disk_size])
def _partition_image(self, image_name):
with self.build_watch('partition-image'):
self.ex.runv(['parted', '-s', image_name, 'mklabel', 'msdos'])
self.ex.runv(['parted', '-s', image_name, 'mkpart', 'primary',
'0%', '100%'])
self.ex.runv(['parted', '-s', image_name,
'set', '1', 'boot', 'on'])
def _install_mbr(self, image_name):
with self.build_watch('install-mbr'):
self.ex.runv(['install-mbr', image_name])
def _setup_device_mapping(self, image_name):
with self.build_watch('setup-device-mapper'):
out = self.ex.runv(['kpartx', '-av', image_name])
devices = [line.split()[2]
for line in out.splitlines()
if line.startswith('add map ')]
partition = '/dev/mapper/%s' % devices[0]
def _create_fs(self, partition):
with self.build_watch('create-filesystem'):
self.ex.runv(['mkfs', '-t', 'ext3', partition])
def _mount(self, partition, mount_point):
with self.build_watch('mount-filesystem'):
os.mkdir(mount_point)
self.ex.runv(['mount', partition, mount_point])
def _unpack_strata(self, mount_point):
with self.build_watch('unpack-strata'):
for name, filename in self.stage_items:
self.msg('unpack %s from %s' % (name, filename))
self.ex.runv(['tar', '-C', mount_point, '-xf', filename])
ldconfig(self.ex, mount_point)
def _create_fstab(self, mount_point):
with self.build_watch('create-fstab'):
fstab = os.path.join(mount_point, 'etc', 'fstab')
if not os.path.exists(os.path.dirname(fstab)):
os.makedirs(os.path.dirname(fstab))
# sorry about the hack, I wish I knew a better way
self.ex.runv(['tee', fstab], feed_stdin='''
proc /proc proc defaults 0 0
sysfs /sys sysfs defaults 0 0
/dev/sda1 / ext4 errors=remount-ro 0 1
''', stdout=open(os.devnull,'w'))
def _install_extlinux(self, mount_point):
with self.build_watch('install-bootloader'):
conf = os.path.join(mount_point, 'extlinux.conf')
logging.debug('configure extlinux %s' % conf)
self.ex.runv(['tee', conf], feed_stdin='''
default linux
timeout 1
label linux
kernel /vmlinuz
append root=/dev/sda1 init=/sbin/init quiet rw
''', stdout=open(os.devnull, 'w'))
self.ex.runv(['extlinux', '--install', mount_point])
# Weird hack that makes extlinux work.
# FIXME: There is a bug somewhere.
self.ex.runv(['sync'])
time.sleep(2)
def _unmount(self, mount_point):
if mount_point is not None:
with self.build_watch('unmount-filesystem'):
self.ex.runv(['umount', mount_point])
def _undo_device_mapping(self, image_name):
with self.build_watch('undo-device-mapper'):
self.ex.runv(['kpartx', '-d', image_name])
def _move_image_to_cache(self, image_name):
with self.build_watch('cache-image'):
filename = self.filename(self.blob.morph.name)
self.ex.runv(['mv', image_name, filename])
class Builder(object): # pragma: no cover
'''Build binary objects for Baserock.
The objects may be chunks or strata.'''
def __init__(self, tempdir, app, morph_loader, source_manager, factory):
self.tempdir = tempdir
self.app = app
self.real_msg = app.msg
self.settings = app.settings
self.dump_memory_profile = app.dump_memory_profile
self.cachedir = morphlib.cachedir.CacheDir(self.settings['cachedir'])
self.morph_loader = morph_loader
self.source_manager = source_manager
self.factory = factory
self.indent = 0
def msg(self, text):
spaces = ' ' * self.indent
self.real_msg('%s%s' % (spaces, text))
def indent_more(self):
self.indent += 1
def indent_less(self):
self.indent -= 1
def build(self, blobs, build_order):
'''Build a list of groups of morphologies. Items in a group
can be built in parallel.'''
self.indent_more()
# first pass: create builders for all blobs
builders = {}
for group in build_order:
for blob in group:
builder = self.create_blob_builder(blob)
builders[blob] = builder
# second pass: build group by group, item after item
for group in build_order:
for blob in group:
self.msg('Building %s' % blob)
self.indent_more()
## TODO this needs to be done recursively
## make sure all dependencies are in the staging area
#for dependency in blob.dependencies:
# depbuilder = builders[dependency]
# depbuilder.stage()
## TODO this needs the set of recursively collected
## dependencies
## make sure all non-dependencies are not staged
#for nondependency in (blobs - blob.dependencies):
# depbuilder = builders[nondependency]
# depbuilder.unstage()
builder = builders[blob]
# get a list of all the items we have to build for this blob
builds = builder.builds()
# if not all build items are in the cache, rebuild the blob
if not self.all_built(builds):
built_items = builders[blob].build()
# check again, fail if not all build items were actually built
if not self.all_built(builds):
raise Exception('Not all builds results expected from %s '
'were actually built' % self.blob)
for parent in blob.parents:
for item, filename in built_items:
self.msg('Marking %s to be staged for %s' %
(item, parent))
parent_builder = builders[parent]
parent_builder.stage_items += built_items
self.indent_less()
self.indent_less()
def all_built(self, builds):
return all(os.path.isfile(builds[name]) for name in builds)
def build_single(self, blob, blobs, build_order):
self.indent_more()
# first pass: create builders for all blobs
builders = {}
for group in build_order:
for b in group:
builder = self.create_blob_builder(b)
builders[b] = builder
# second pass: mark all dependencies for staging
queue = collections.deque()
visited = set()
for dependency in blob.dependencies:
queue.append(dependency)
visited.add(dependency)
while len(queue) > 0:
dependency = queue.popleft()
built_items = builders[dependency].builds()
for name, filename in built_items.items():
self.msg('Marking %s to be staged for %s' % (name, blob))
builders[blob].stage_items.append((name, filename))
for dep in dependency.dependencies:
if (dependency.morph.kind == 'stratum' and
not dep.morph.kind == 'chunk'):
if dep not in visited:
queue.append(dep)
visited.add(dep)
# build the single blob now
builders[blob].build()
self.indent_less()
def create_blob_builder(self, blob):
if isinstance(blob, morphlib.blobs.Stratum):
builder = StratumBuilder(self.app, blob)
elif isinstance(blob, morphlib.blobs.Chunk):
builder = ChunkBuilder(self.app, blob)
elif isinstance(blob, morphlib.blobs.System):
builder = SystemBuilder(self.app, blob)
else:
raise TypeError('Blob %s has unknown type %s' %
(str(blob), type(blob)))
cache_id = self.get_cache_id(blob)
logging.debug('cache id: %s' % repr(cache_id))
self.dump_memory_profile('after computing cache id')
s = self.factory.staging
assert s is not None, repr(s)
builder.builddir = os.path.join(s, '%s.build' % blob.morph.name)
builder.destdir = os.path.join(s, '%s.inst' % blob.morph.name)
builder.settings = self.settings
builder.real_msg = self.msg
builder.cachedir = self.cachedir
builder.cache_key = cache_id
builder.tempdir = self.tempdir
builder.factory = self.factory
builder.dump_memory_profile = self.dump_memory_profile
return builder
def get_cache_id(self, blob):
logging.debug('get_cache_id(%s)' % blob)
if blob.morph.kind == 'chunk':
kids = []
elif blob.morph.kind == 'stratum':
kids = []
for source in blob.morph.sources:
repo = source['repo']
ref = source['ref']
treeish = self.source_manager.get_treeish(repo, ref)
filename = (source['morph']
if 'morph' in source
else source['name'])
filename = '%s.morph' % filename
morph = self.morph_loader.load(treeish, filename)
chunk = morphlib.blobs.Blob.create_blob(morph)
cache_id = self.get_cache_id(chunk)
kids.append(cache_id)
elif blob.morph.kind == 'system':
kids = []
for stratum_name in blob.morph.strata:
filename = '%s.morph' % stratum_name
morph = self.morph_loader.load(blob.morph.treeish, filename)
stratum = morphlib.blobs.Blob.create_blob(morph)
cache_id = self.get_cache_id(stratum)
kids.append(cache_id)
else:
raise NotImplementedError('unknown morph kind %s' %
blob.morph.kind)
dict_key = {
'name': blob.morph.name,
'arch': morphlib.util.arch(),
'ref': blob.morph.treeish.sha1,
'kids': ''.join(self.cachedir.key(k) for k in kids),
}
return dict_key
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