blob: 464835c5be5c94c889543090a801cffe72cee6fa [file] [log] [blame]
# SPDX-License-Identifier: GPL-2.0+
# Copyright (c) 2013 The Chromium OS Authors.
#
"""Control module for buildman
This holds the main control logic for buildman, when not running tests.
"""
import getpass
import multiprocessing
import os
import shutil
import sys
import tempfile
import time
from buildman import boards
from buildman import bsettings
from buildman import cfgutil
from buildman import toolchain
from buildman.builder import Builder
from patman import gitutil
from patman import patchstream
from u_boot_pylib import command
from u_boot_pylib import terminal
from u_boot_pylib import tools
from u_boot_pylib.terminal import print_clear, tprint
TEST_BUILDER = None
# Space-separated list of buildman process IDs currently running jobs
RUNNING_FNAME = f'buildmanq.{getpass.getuser()}'
# Lock file for access to RUNNING_FILE
LOCK_FNAME = f'{RUNNING_FNAME}.lock'
# Wait time for access to lock (seconds)
LOCK_WAIT_S = 10
# Wait time to start running
RUN_WAIT_S = 300
def get_plural(count):
"""Returns a plural 's' if count is not 1"""
return 's' if count != 1 else ''
def count_build_commits(commits, step):
"""Calculate the number of commits to be built
Args:
commits (list of Commit): Commits to build or None
step (int): Step value for commits, typically 1
Returns:
Number of commits that will be built
"""
if commits:
count = len(commits)
return (count + step - 1) // step
return 0
def get_action_summary(is_summary, commit_count, selected, threads, jobs):
"""Return a string summarising the intended action.
Args:
is_summary (bool): True if this is a summary (otherwise it is building)
commits (list): List of commits being built
selected (list of Board): List of Board objects that are marked
step (int): Step increment through commits
threads (int): Number of processor threads being used
jobs (int): Number of jobs to build at once
Returns:
Summary string.
"""
if commit_count:
commit_str = f'{commit_count} commit{get_plural(commit_count)}'
else:
commit_str = 'current source'
msg = (f"{'Summary of' if is_summary else 'Building'} "
f'{commit_str} for {len(selected)} boards')
msg += (f' ({threads} thread{get_plural(threads)}, '
f'{jobs} job{get_plural(jobs)} per thread)')
return msg
# pylint: disable=R0913
def show_actions(series, why_selected, boards_selected, output_dir,
board_warnings, step, threads, jobs, verbose):
"""Display a list of actions that we would take, if not a dry run.
Args:
series: Series object
why_selected: Dictionary where each key is a buildman argument
provided by the user, and the value is the list of boards
brought in by that argument. For example, 'arm' might bring
in 400 boards, so in this case the key would be 'arm' and
the value would be a list of board names.
boards_selected: Dict of selected boards, key is target name,
value is Board object
output_dir (str): Output directory for builder
board_warnings: List of warnings obtained from board selected
step (int): Step increment through commits
threads (int): Number of processor threads being used
jobs (int): Number of jobs to build at once
verbose (bool): True to indicate why each board was selected
"""
col = terminal.Color()
print('Dry run, so not doing much. But I would do this:')
print()
if series:
commits = series.commits
else:
commits = None
print(get_action_summary(False, count_build_commits(commits, step),
boards_selected, threads, jobs))
print(f'Build directory: {output_dir}')
if commits:
for upto in range(0, len(series.commits), step):
commit = series.commits[upto]
print(' ', col.build(col.YELLOW, commit.hash[:8], bright=False), end=' ')
print(commit.subject)
print()
for arg in why_selected:
if arg != 'all':
print(arg, f': {len(why_selected[arg])} boards')
if verbose:
print(f" {' '.join(why_selected[arg])}")
print('Total boards to build for each '
f"commit: {len(why_selected['all'])}\n")
if board_warnings:
for warning in board_warnings:
print(col.build(col.YELLOW, warning))
def show_toolchain_prefix(brds, toolchains):
"""Show information about a the tool chain used by one or more boards
The function checks that all boards use the same toolchain, then prints
the correct value for CROSS_COMPILE.
Args:
boards: Boards object containing selected boards
toolchains: Toolchains object containing available toolchains
Return:
None on success, string error message otherwise
"""
board_selected = brds.get_selected_dict()
tc_set = set()
for brd in board_selected.values():
tc_set.add(toolchains.Select(brd.arch))
if len(tc_set) != 1:
sys.exit('Supplied boards must share one toolchain')
tchain = tc_set.pop()
print(tchain.GetEnvArgs(toolchain.VAR_CROSS_COMPILE))
def show_arch(brds):
"""Show information about a the architecture used by one or more boards
The function checks that all boards use the same architecture, then prints
the correct value for ARCH.
Args:
boards: Boards object containing selected boards
Return:
None on success, string error message otherwise
"""
board_selected = brds.get_selected_dict()
arch_set = set()
for brd in board_selected.values():
arch_set.add(brd.arch)
if len(arch_set) != 1:
sys.exit('Supplied boards must share one arch')
print(arch_set.pop())
def get_allow_missing(opt_allow, opt_no_allow, num_selected, has_branch):
"""Figure out whether to allow external blobs
Uses the allow-missing setting and the provided arguments to decide whether
missing external blobs should be allowed
Args:
opt_allow (bool): True if --allow-missing flag is set
opt_no_allow (bool): True if --no-allow-missing flag is set
num_selected (int): Number of selected board
has_branch (bool): True if a git branch (to build) has been provided
Returns:
bool: True to allow missing external blobs, False to produce an error if
external blobs are used
"""
allow_missing = False
am_setting = bsettings.get_global_item_value('allow-missing')
if am_setting:
if am_setting == 'always':
allow_missing = True
if 'multiple' in am_setting and num_selected > 1:
allow_missing = True
if 'branch' in am_setting and has_branch:
allow_missing = True
if opt_allow:
allow_missing = True
if opt_no_allow:
allow_missing = False
return allow_missing
def count_commits(branch, count, col, git_dir):
"""Could the number of commits in the branch/ranch being built
Args:
branch (str): Name of branch to build, or None if none
count (int): Number of commits to build, or -1 for all
col (Terminal.Color): Color object to use
git_dir (str): Git directory to use, e.g. './.git'
Returns:
tuple:
Number of commits being built
True if the 'branch' string contains a range rather than a simple
name
"""
has_range = branch and '..' in branch
if count == -1:
if not branch:
count = 1
else:
if has_range:
count, msg = gitutil.count_commits_in_range(git_dir, branch)
else:
count, msg = gitutil.count_commits_in_branch(git_dir, branch)
if count is None:
sys.exit(col.build(col.RED, msg))
elif count == 0:
sys.exit(col.build(col.RED,
f"Range '{branch}' has no commits"))
if msg:
print(col.build(col.YELLOW, msg))
count += 1 # Build upstream commit also
if not count:
msg = (f"No commits found to process in branch '{branch}': "
"set branch's upstream or use -c flag")
sys.exit(col.build(col.RED, msg))
return count, has_range
def determine_series(selected, col, git_dir, count, branch, work_in_output):
"""Determine the series which is to be built, if any
If there is a series, the commits in that series are numbered by setting
their sequence value (starting from 0). This is used by tests.
Args:
selected (list of Board): List of Board objects that are marked
selected
col (Terminal.Color): Color object to use
git_dir (str): Git directory to use, e.g. './.git'
count (int): Number of commits in branch
branch (str): Name of branch to build, or None if none
work_in_output (bool): True to work in the output directory
Returns:
Series: Series to build, or None for none
Read the metadata from the commits. First look at the upstream commit,
then the ones in the branch. We would like to do something like
upstream/master~..branch but that isn't possible if upstream/master is
a merge commit (it will list all the commits that form part of the
merge)
Conflicting tags are not a problem for buildman, since it does not use
them. For example, Series-version is not useful for buildman. On the
other hand conflicting tags will cause an error. So allow later tags
to overwrite earlier ones by setting allow_overwrite=True
"""
# Work out how many commits to build. We want to build everything on the
# branch. We also build the upstream commit as a control so we can see
# problems introduced by the first commit on the branch.
count, has_range = count_commits(branch, count, col, git_dir)
if work_in_output:
if len(selected) != 1:
sys.exit(col.build(col.RED,
'-w can only be used with a single board'))
if count != 1:
sys.exit(col.build(col.RED,
'-w can only be used with a single commit'))
if branch:
if count == -1:
if has_range:
range_expr = branch
else:
range_expr = gitutil.get_range_in_branch(git_dir, branch)
upstream_commit = gitutil.get_upstream(git_dir, branch)
series = patchstream.get_metadata_for_list(upstream_commit,
git_dir, 1, series=None, allow_overwrite=True)
series = patchstream.get_metadata_for_list(range_expr,
git_dir, None, series, allow_overwrite=True)
else:
# Honour the count
series = patchstream.get_metadata_for_list(branch,
git_dir, count, series=None, allow_overwrite=True)
# Number the commits for test purposes
for i, commit in enumerate(series.commits):
commit.sequence = i
else:
series = None
return series
def do_fetch_arch(toolchains, col, fetch_arch):
"""Handle the --fetch-arch option
Args:
toolchains (Toolchains): Tool chains to use
col (terminal.Color): Color object to build
fetch_arch (str): Argument passed to the --fetch-arch option
Returns:
int: Return code for buildman
"""
if fetch_arch == 'list':
sorted_list = toolchains.ListArchs()
print(col.build(
col.BLUE,
f"Available architectures: {' '.join(sorted_list)}\n"))
return 0
if fetch_arch == 'all':
fetch_arch = ','.join(toolchains.ListArchs())
print(col.build(col.CYAN,
f'\nDownloading toolchains: {fetch_arch}'))
for arch in fetch_arch.split(','):
print()
ret = toolchains.FetchAndInstall(arch)
if ret:
return ret
return 0
def get_toolchains(toolchains, col, override_toolchain, fetch_arch,
list_tool_chains, verbose):
"""Get toolchains object to use
Args:
toolchains (Toolchains or None): Toolchains to use. If None, then a
Toolchains object will be created and scanned
col (Terminal.Color): Color object
override_toolchain (str or None): Override value for toolchain, or None
fetch_arch (bool): True to fetch the toolchain for the architectures
list_tool_chains (bool): True to list all tool chains
verbose (bool): True for verbose output when listing toolchains
Returns:
Either:
int: Operation completed and buildman should exit with exit code
Toolchains: Toolchains object to use
"""
no_toolchains = toolchains is None
if no_toolchains:
toolchains = toolchain.Toolchains(override_toolchain)
if fetch_arch:
return do_fetch_arch(toolchains, col, fetch_arch)
if no_toolchains:
toolchains.GetSettings()
toolchains.Scan(list_tool_chains and verbose)
if list_tool_chains:
toolchains.List()
print()
return 0
return toolchains
def get_boards_obj(output_dir, regen_board_list, maintainer_check, full_check,
threads, verbose):
"""Object the Boards object to use
Creates the output directory and ensures there is a boards.cfg file, then
read it in.
Args:
output_dir (str): Output directory to use
regen_board_list (bool): True to just regenerate the board list
maintainer_check (bool): True to just run a maintainer check
full_check (bool): True to just run a full check of Kconfig and
maintainers
threads (int or None): Number of threads to use to create boards file
verbose (bool): False to suppress output from boards-file generation
Returns:
Either:
int: Operation completed and buildman should exit with exit code
Boards: Boards object to use
"""
brds = boards.Boards()
nr_cpus = threads or multiprocessing.cpu_count()
if maintainer_check or full_check:
warnings = brds.build_board_list(jobs=nr_cpus,
warn_targets=full_check)[1]
if warnings:
for warn in warnings:
print(warn, file=sys.stderr)
return 2
return 0
if not os.path.exists(output_dir):
os.makedirs(output_dir)
board_file = os.path.join(output_dir, 'boards.cfg')
if regen_board_list and regen_board_list != '-':
board_file = regen_board_list
okay = brds.ensure_board_list(board_file, nr_cpus, force=regen_board_list,
quiet=not verbose)
if regen_board_list:
return 0 if okay else 2
brds.read_boards(board_file)
return brds
def determine_boards(brds, args, col, opt_boards, exclude_list):
"""Determine which boards to build
Each element of args and exclude can refer to a board name, arch or SoC
Args:
brds (Boards): Boards object
args (list of str): Arguments describing boards to build
col (Terminal.Color): Color object
opt_boards (list of str): Specific boards to build, or None for all
exclude_list (list of str): Arguments describing boards to exclude
Returns:
tuple:
list of Board: List of Board objects that are marked selected
why_selected: Dictionary where each key is a buildman argument
provided by the user, and the value is the list of boards
brought in by that argument. For example, 'arm' might bring
in 400 boards, so in this case the key would be 'arm' and
the value would be a list of board names.
board_warnings: List of warnings obtained from board selected
"""
exclude = []
if exclude_list:
for arg in exclude_list:
exclude += arg.split(',')
if opt_boards:
requested_boards = []
for brd in opt_boards:
requested_boards += brd.split(',')
else:
requested_boards = None
why_selected, board_warnings = brds.select_boards(args, exclude,
requested_boards)
selected = brds.get_selected()
if not selected:
sys.exit(col.build(col.RED, 'No matching boards found'))
return selected, why_selected, board_warnings
def adjust_args(args, series, selected):
"""Adjust arguments according to various constraints
Updates verbose, show_errors, threads, jobs and step
Args:
args (Namespace): Namespace object to adjust
series (Series): Series being built / summarised
selected (list of Board): List of Board objects that are marked
"""
if not series and not args.dry_run:
args.verbose = True
if not args.summary:
args.show_errors = True
# By default we have one thread per CPU. But if there are not enough jobs
# we can have fewer threads and use a high '-j' value for make.
if args.threads is None:
args.threads = min(multiprocessing.cpu_count(), len(selected))
if not args.jobs:
args.jobs = max(1, (multiprocessing.cpu_count() +
len(selected) - 1) // len(selected))
if not args.step:
args.step = len(series.commits) - 1
# We can't show function sizes without board details at present
if args.show_bloat:
args.show_detail = True
def setup_output_dir(output_dir, work_in_output, branch, no_subdirs, col,
clean_dir):
"""Set up the output directory
Args:
output_dir (str): Output directory provided by the user, or None if none
work_in_output (bool): True to work in the output directory
branch (str): Name of branch to build, or None if none
no_subdirs (bool): True to put the output in the top-level output dir
clean_dir: Used for tests only, indicates that the existing output_dir
should be removed before starting the build
Returns:
str: Updated output directory pathname
"""
if not output_dir:
if work_in_output:
sys.exit(col.build(col.RED, '-w requires that you specify -o'))
output_dir = '..'
if branch and not no_subdirs:
# As a special case allow the board directory to be placed in the
# output directory itself rather than any subdirectory.
dirname = branch.replace('/', '_')
output_dir = os.path.join(output_dir, dirname)
if clean_dir and os.path.exists(output_dir):
shutil.rmtree(output_dir)
return output_dir
def run_builder(builder, commits, board_selected, args):
"""Run the builder or show the summary
Args:
commits (list of Commit): List of commits being built, None if no branch
boards_selected (dict): Dict of selected boards:
key: target name
value: Board object
args (Namespace): Namespace to use
Returns:
int: Return code for buildman
"""
gnu_make = command.output(os.path.join(args.git,
'scripts/show-gnu-make'), raise_on_error=False).rstrip()
if not gnu_make:
sys.exit('GNU Make not found')
builder.gnu_make = gnu_make
if not args.ide:
commit_count = count_build_commits(commits, args.step)
tprint(get_action_summary(args.summary, commit_count, board_selected,
args.threads, args.jobs))
builder.set_display_options(
args.show_errors, args.show_sizes, args.show_detail, args.show_bloat,
args.list_error_boards, args.show_config, args.show_environment,
args.filter_dtb_warnings, args.filter_migration_warnings, args.ide)
if args.summary:
builder.show_summary(commits, board_selected)
else:
fail, warned, excs = builder.build_boards(
commits, board_selected, args.keep_outputs, args.verbose)
if excs:
return 102
if fail:
return 100
if warned and not args.ignore_warnings:
return 101
return 0
def calc_adjust_cfg(adjust_cfg, reproducible_builds):
"""Calculate the value to use for adjust_cfg
Args:
adjust_cfg (list of str): List of configuration changes. See cfgutil for
details
reproducible_builds (bool): True to adjust the configuration to get
reproduceable builds
Returns:
adjust_cfg (list of str): List of configuration changes
"""
adjust_cfg = cfgutil.convert_list_to_dict(adjust_cfg)
# Drop LOCALVERSION_AUTO since it changes the version string on every commit
if reproducible_builds:
# If these are mentioned, leave the local version alone
if 'LOCALVERSION' in adjust_cfg or 'LOCALVERSION_AUTO' in adjust_cfg:
print('Not dropping LOCALVERSION_AUTO for reproducible build')
else:
adjust_cfg['LOCALVERSION_AUTO'] = '~'
return adjust_cfg
def read_procs(tmpdir=tempfile.gettempdir()):
"""Read the list of running buildman processes
If the list is corrupted, returns an empty list
Args:
tmpdir (str): Temporary directory to use (for testing only)
"""
running_fname = os.path.join(tmpdir, RUNNING_FNAME)
procs = []
if os.path.exists(running_fname):
items = tools.read_file(running_fname, binary=False).split()
try:
procs = [int(x) for x in items]
except ValueError: # Handle invalid format
pass
return procs
def check_pid(pid):
"""Check for existence of a unix PID
https://stackoverflow.com/questions/568271/how-to-check-if-there-exists-a-process-with-a-given-pid-in-python
Args:
pid (int): PID to check
Returns:
True if it exists, else False
"""
try:
os.kill(pid, 0)
except OSError:
return False
else:
return True
def write_procs(procs, tmpdir=tempfile.gettempdir()):
"""Write the list of running buildman processes
Args:
tmpdir (str): Temporary directory to use (for testing only)
"""
running_fname = os.path.join(tmpdir, RUNNING_FNAME)
tools.write_file(running_fname, ' '.join([str(p) for p in procs]),
binary=False)
# Allow another user to access the file
os.chmod(running_fname, 0o666)
def wait_for_process_limit(limit, tmpdir=tempfile.gettempdir(),
pid=os.getpid()):
"""Wait until the number of buildman processes drops to the limit
This uses FileLock to protect a 'running' file, which contains a list of
PIDs of running buildman processes. The number of PIDs in the file indicates
the number of running processes.
When buildman starts up, it calls this function to wait until it is OK to
start the build.
On exit, no attempt is made to remove the PID from the file, since other
buildman processes will notice that the PID is no-longer valid, and ignore
it.
Two timeouts are provided:
LOCK_WAIT_S: length of time to wait for the lock; if this occurs, the
lock is busted / removed before trying again
RUN_WAIT_S: length of time to wait to be allowed to run; if this occurs,
the build starts, with the PID being added to the file.
Args:
limit (int): Maximum number of buildman processes, including this one;
must be > 0
tmpdir (str): Temporary directory to use (for testing only)
pid (int): Current process ID (for testing only)
"""
from filelock import Timeout, FileLock
running_fname = os.path.join(tmpdir, RUNNING_FNAME)
lock_fname = os.path.join(tmpdir, LOCK_FNAME)
lock = FileLock(lock_fname)
# Allow another user to access the file
col = terminal.Color()
tprint('Waiting for other buildman processes...', newline=False,
colour=col.RED)
claimed = False
deadline = time.time() + RUN_WAIT_S
while True:
try:
with lock.acquire(timeout=LOCK_WAIT_S):
os.chmod(lock_fname, 0o666)
procs = read_procs(tmpdir)
# Drop PIDs which are not running
procs = list(filter(check_pid, procs))
# If we haven't hit the limit, add ourself
if len(procs) < limit:
tprint('done...', newline=False)
claimed = True
if time.time() >= deadline:
tprint('timeout...', newline=False)
claimed = True
if claimed:
write_procs(procs + [pid], tmpdir)
break
except Timeout:
tprint('failed to get lock: busting...', newline=False)
os.remove(lock_fname)
time.sleep(1)
tprint('starting build', newline=False)
print_clear()
def do_buildman(args, toolchains=None, make_func=None, brds=None,
clean_dir=False, test_thread_exceptions=False):
"""The main control code for buildman
Args:
args: ArgumentParser object
args: Command line arguments (list of strings)
toolchains: Toolchains to use - this should be a Toolchains()
object. If None, then it will be created and scanned
make_func: Make function to use for the builder. This is called
to execute 'make'. If this is None, the normal function
will be used, which calls the 'make' tool with suitable
arguments. This setting is useful for tests.
brds: Boards() object to use, containing a list of available
boards. If this is None it will be created and scanned.
clean_dir: Used for tests only, indicates that the existing output_dir
should be removed before starting the build
test_thread_exceptions: Uses for tests only, True to make the threads
raise an exception instead of reporting their result. This simulates
a failure in the code somewhere
"""
# Used so testing can obtain the builder: pylint: disable=W0603
global TEST_BUILDER
gitutil.setup()
col = terminal.Color()
git_dir = os.path.join(args.git, '.git')
toolchains = get_toolchains(toolchains, col, args.override_toolchain,
args.fetch_arch, args.list_tool_chains,
args.verbose)
if isinstance(toolchains, int):
return toolchains
output_dir = setup_output_dir(
args.output_dir, args.work_in_output, args.branch,
args.no_subdirs, col, clean_dir)
# Work out what subset of the boards we are building
if not brds:
brds = get_boards_obj(output_dir, args.regen_board_list,
args.maintainer_check, args.full_check,
args.threads, args.verbose and
not args.print_arch and not args.print_prefix)
if isinstance(brds, int):
return brds
selected, why_selected, board_warnings = determine_boards(
brds, args.terms, col, args.boards, args.exclude)
if args.print_prefix:
show_toolchain_prefix(brds, toolchains)
return 0
if args.print_arch:
show_arch(brds)
return 0
series = determine_series(selected, col, git_dir, args.count,
args.branch, args.work_in_output)
adjust_args(args, series, selected)
# For a dry run, just show our actions as a sanity check
if args.dry_run:
show_actions(series, why_selected, selected, output_dir, board_warnings,
args.step, args.threads, args.jobs,
args.verbose)
return 0
# Create a new builder with the selected args
builder = Builder(toolchains, output_dir, git_dir,
args.threads, args.jobs, checkout=True,
show_unknown=args.show_unknown, step=args.step,
no_subdirs=args.no_subdirs, full_path=args.full_path,
verbose_build=args.verbose_build,
mrproper=args.mrproper,
fallback_mrproper=args.fallback_mrproper,
per_board_out_dir=args.per_board_out_dir,
config_only=args.config_only,
squash_config_y=not args.preserve_config_y,
warnings_as_errors=args.warnings_as_errors,
work_in_output=args.work_in_output,
test_thread_exceptions=test_thread_exceptions,
adjust_cfg=calc_adjust_cfg(args.adjust_cfg,
args.reproducible_builds),
allow_missing=get_allow_missing(args.allow_missing,
args.no_allow_missing,
len(selected), args.branch),
no_lto=args.no_lto,
reproducible_builds=args.reproducible_builds,
force_build = args.force_build,
force_build_failures = args.force_build_failures,
force_reconfig = args.force_reconfig, in_tree = args.in_tree,
force_config_on_failure=not args.quick, make_func=make_func)
TEST_BUILDER = builder
if args.process_limit:
wait_for_process_limit(args.process_limit)
return run_builder(builder, series.commits if series else None,
brds.get_selected_dict(), args)