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tools: add genboardscfg.py

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Now the primary data for each board is in Kconfig, defconfig and
MAINTAINERS.

It is true boards.cfg is needed for MAKEALL and buildman and might be
useful to brouse all the supported boards in a single database.
But it would be painful to maintain the boards.cfg in sync.

So, this is the solution.
Add a tool to generate the equivalent boards.cfg file based on
the latest Kconfig, defconfig and MAINTAINERS.

We can keep all the functions of MAKEALL and buildman with it.

The best thing would be to change MAKEALL and buildman for not
depending on boards.cfg in the future, but it would take some time.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Masahiro Yamada 2014-07-30 14:08:19 +09:00 committed by Tom Rini
parent 93d4334f7f
commit 3c08e8b856
1 changed files with 504 additions and 0 deletions
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#!/usr/bin/env python
#
# Author: Masahiro Yamada <yamada.m@jp.panasonic.com>
#
# SPDX-License-Identifier: GPL-2.0+
#
"""
Converter from Kconfig and MAINTAINERS to boards.cfg
Run 'tools/genboardscfg.py' to create boards.cfg file.
Run 'tools/genboardscfg.py -h' for available options.
"""
import errno
import fnmatch
import glob
import optparse
import os
import re
import shutil
import subprocess
import sys
import tempfile
import time
BOARD_FILE = 'boards.cfg'
CONFIG_DIR = 'configs'
REFORMAT_CMD = [os.path.join('tools', 'reformat.py'),
'-i', '-d', '-', '-s', '8']
SHOW_GNU_MAKE = 'scripts/show-gnu-make'
SLEEP_TIME=0.03
COMMENT_BLOCK = '''#
# List of boards
# Automatically generated by %s: don't edit
#
# Status, Arch, CPU(:SPLCPU), SoC, Vendor, Board, Target, Options, Maintainers
''' % __file__
### helper functions ###
def get_terminal_columns():
"""Get the width of the terminal.
Returns:
The width of the terminal, or zero if the stdout is not
associated with tty.
"""
try:
return shutil.get_terminal_size().columns # Python 3.3~
except AttributeError:
import fcntl
import termios
import struct
arg = struct.pack('hhhh', 0, 0, 0, 0)
try:
ret = fcntl.ioctl(sys.stdout.fileno(), termios.TIOCGWINSZ, arg)
except IOError as exception:
if exception.errno != errno.ENOTTY:
raise
# If 'Inappropriate ioctl for device' error occurs,
# stdout is probably redirected. Return 0.
return 0
return struct.unpack('hhhh', ret)[1]
def get_devnull():
"""Get the file object of '/dev/null' device."""
try:
devnull = subprocess.DEVNULL # py3k
except AttributeError:
devnull = open(os.devnull, 'wb')
return devnull
def check_top_directory():
"""Exit if we are not at the top of source directory."""
for f in ('README', 'Licenses'):
if not os.path.exists(f):
print >> sys.stderr, 'Please run at the top of source directory.'
sys.exit(1)
def get_make_cmd():
"""Get the command name of GNU Make."""
process = subprocess.Popen([SHOW_GNU_MAKE], stdout=subprocess.PIPE)
ret = process.communicate()
if process.returncode:
print >> sys.stderr, 'GNU Make not found'
sys.exit(1)
return ret[0].rstrip()
### classes ###
class MaintainersDatabase:
"""The database of board status and maintainers."""
def __init__(self):
"""Create an empty database."""
self.database = {}
def get_status(self, target):
"""Return the status of the given board.
Returns:
Either 'Active' or 'Orphan'
"""
tmp = self.database[target][0]
if tmp.startswith('Maintained'):
return 'Active'
elif tmp.startswith('Orphan'):
return 'Orphan'
else:
print >> sys.stderr, 'Error: %s: unknown status' % tmp
def get_maintainers(self, target):
"""Return the maintainers of the given board.
If the board has two or more maintainers, they are separated
with colons.
"""
return ':'.join(self.database[target][1])
def parse_file(self, file):
"""Parse the given MAINTAINERS file.
This method parses MAINTAINERS and add board status and
maintainers information to the database.
Arguments:
file: MAINTAINERS file to be parsed
"""
targets = []
maintainers = []
status = '-'
for line in open(file):
tag, rest = line[:2], line[2:].strip()
if tag == 'M:':
maintainers.append(rest)
elif tag == 'F:':
# expand wildcard and filter by 'configs/*_defconfig'
for f in glob.glob(rest):
front, match, rear = f.partition('configs/')
if not front and match:
front, match, rear = rear.rpartition('_defconfig')
if match and not rear:
targets.append(front)
elif tag == 'S:':
status = rest
elif line == '\n' and targets:
for target in targets:
self.database[target] = (status, maintainers)
targets = []
maintainers = []
status = '-'
if targets:
for target in targets:
self.database[target] = (status, maintainers)
class DotConfigParser:
"""A parser of .config file.
Each line of the output should have the form of:
Status, Arch, CPU, SoC, Vendor, Board, Target, Options, Maintainers
Most of them are extracted from .config file.
MAINTAINERS files are also consulted for Status and Maintainers fields.
"""
re_arch = re.compile(r'CONFIG_SYS_ARCH="(.*)"')
re_cpu = re.compile(r'CONFIG_SYS_CPU="(.*)"')
re_soc = re.compile(r'CONFIG_SYS_SOC="(.*)"')
re_vendor = re.compile(r'CONFIG_SYS_VENDOR="(.*)"')
re_board = re.compile(r'CONFIG_SYS_BOARD="(.*)"')
re_config = re.compile(r'CONFIG_SYS_CONFIG_NAME="(.*)"')
re_options = re.compile(r'CONFIG_SYS_EXTRA_OPTIONS="(.*)"')
re_list = (('arch', re_arch), ('cpu', re_cpu), ('soc', re_soc),
('vendor', re_vendor), ('board', re_board),
('config', re_config), ('options', re_options))
must_fields = ('arch', 'config')
def __init__(self, build_dir, output, maintainers_database):
"""Create a new .config perser.
Arguments:
build_dir: Build directory where .config is located
output: File object which the result is written to
maintainers_database: An instance of class MaintainersDatabase
"""
self.dotconfig = os.path.join(build_dir, '.config')
self.output = output
self.database = maintainers_database
def parse(self, defconfig):
"""Parse .config file and output one-line database for the given board.
Arguments:
defconfig: Board (defconfig) name
"""
fields = {}
for line in open(self.dotconfig):
if not line.startswith('CONFIG_SYS_'):
continue
for (key, pattern) in self.re_list:
m = pattern.match(line)
if m and m.group(1):
fields[key] = m.group(1)
break
# sanity check of '.config' file
for field in self.must_fields:
if not field in fields:
print >> sys.stderr, 'Error: %s is not defined in %s' % \
(field, defconfig)
sys.exit(1)
# fix-up for aarch64 and tegra
if fields['arch'] == 'arm' and 'cpu' in fields:
if fields['cpu'] == 'armv8':
fields['arch'] = 'aarch64'
if 'soc' in fields and re.match('tegra[0-9]*$', fields['soc']):
fields['cpu'] += ':arm720t'
target, match, rear = defconfig.partition('_defconfig')
assert match and not rear, \
'%s : invalid defconfig file name' % defconfig
fields['status'] = self.database.get_status(target)
fields['maintainers'] = self.database.get_maintainers(target)
if 'options' in fields:
options = fields['config'] + ':' + \
fields['options'].replace(r'\"', '"')
elif fields['config'] != target:
options = fields['config']
else:
options = '-'
self.output.write((' '.join(['%s'] * 9) + '\n') %
(fields['status'],
fields['arch'],
fields.get('cpu', '-'),
fields.get('soc', '-'),
fields.get('vendor', '-'),
fields.get('board', '-'),
target,
options,
fields['maintainers']))
class Slot:
"""A slot to store a subprocess.
Each instance of this class handles one subprocess.
This class is useful to control multiple processes
for faster processing.
"""
def __init__(self, output, maintainers_database, devnull, make_cmd):
"""Create a new slot.
Arguments:
output: File object which the result is written to
maintainers_database: An instance of class MaintainersDatabase
"""
self.occupied = False
self.build_dir = tempfile.mkdtemp()
self.devnull = devnull
self.make_cmd = make_cmd
self.parser = DotConfigParser(self.build_dir, output,
maintainers_database)
def __del__(self):
"""Delete the working directory"""
shutil.rmtree(self.build_dir)
def add(self, defconfig):
"""Add a new subprocess to the slot.
Fails if the slot is occupied, that is, the current subprocess
is still running.
Arguments:
defconfig: Board (defconfig) name
Returns:
Return True on success or False on fail
"""
if self.occupied:
return False
o = 'O=' + self.build_dir
self.ps = subprocess.Popen([self.make_cmd, o, defconfig],
stdout=self.devnull)
self.defconfig = defconfig
self.occupied = True
return True
def poll(self):
"""Check if the subprocess is running and invoke the .config
parser if the subprocess is terminated.
Returns:
Return True if the subprocess is terminated, False otherwise
"""
if not self.occupied:
return True
if self.ps.poll() == None:
return False
self.parser.parse(self.defconfig)
self.occupied = False
return True
class Slots:
"""Controller of the array of subprocess slots."""
def __init__(self, jobs, output, maintainers_database):
"""Create a new slots controller.
Arguments:
jobs: A number of slots to instantiate
output: File object which the result is written to
maintainers_database: An instance of class MaintainersDatabase
"""
self.slots = []
devnull = get_devnull()
make_cmd = get_make_cmd()
for i in range(jobs):
self.slots.append(Slot(output, maintainers_database,
devnull, make_cmd))
def add(self, defconfig):
"""Add a new subprocess if a vacant slot is available.
Arguments:
defconfig: Board (defconfig) name
Returns:
Return True on success or False on fail
"""
for slot in self.slots:
if slot.add(defconfig):
return True
return False
def available(self):
"""Check if there is a vacant slot.
Returns:
Return True if a vacant slot is found, False if all slots are full
"""
for slot in self.slots:
if slot.poll():
return True
return False
def empty(self):
"""Check if all slots are vacant.
Returns:
Return True if all slots are vacant, False if at least one slot
is running
"""
ret = True
for slot in self.slots:
if not slot.poll():
ret = False
return ret
class Indicator:
"""A class to control the progress indicator."""
MIN_WIDTH = 15
MAX_WIDTH = 70
def __init__(self, total):
"""Create an instance.
Arguments:
total: A number of boards
"""
self.total = total
self.cur = 0
width = get_terminal_columns()
width = min(width, self.MAX_WIDTH)
width -= self.MIN_WIDTH
if width > 0:
self.enabled = True
else:
self.enabled = False
self.width = width
def inc(self):
"""Increment the counter and show the progress bar."""
if not self.enabled:
return
self.cur += 1
arrow_len = self.width * self.cur // self.total
msg = '%4d/%d [' % (self.cur, self.total)
msg += '=' * arrow_len + '>' + ' ' * (self.width - arrow_len) + ']'
sys.stdout.write('\r' + msg)
sys.stdout.flush()
def __gen_boards_cfg(jobs):
"""Generate boards.cfg file.
Arguments:
jobs: The number of jobs to run simultaneously
Note:
The incomplete boards.cfg is left over when an error (including
the termination by the keyboard interrupt) occurs on the halfway.
"""
check_top_directory()
print 'Generating %s ... (jobs: %d)' % (BOARD_FILE, jobs)
# All the defconfig files to be processed
defconfigs = []
for (dirpath, dirnames, filenames) in os.walk(CONFIG_DIR):
dirpath = dirpath[len(CONFIG_DIR) + 1:]
for filename in fnmatch.filter(filenames, '*_defconfig'):
defconfigs.append(os.path.join(dirpath, filename))
# Parse all the MAINTAINERS files
maintainers_database = MaintainersDatabase()
for (dirpath, dirnames, filenames) in os.walk('.'):
if 'MAINTAINERS' in filenames:
maintainers_database.parse_file(os.path.join(dirpath,
'MAINTAINERS'))
# Output lines should be piped into the reformat tool
reformat_process = subprocess.Popen(REFORMAT_CMD, stdin=subprocess.PIPE,
stdout=open(BOARD_FILE, 'w'))
pipe = reformat_process.stdin
pipe.write(COMMENT_BLOCK)
indicator = Indicator(len(defconfigs))
slots = Slots(jobs, pipe, maintainers_database)
# Main loop to process defconfig files:
# Add a new subprocess into a vacant slot.
# Sleep if there is no available slot.
for defconfig in defconfigs:
while not slots.add(defconfig):
while not slots.available():
# No available slot: sleep for a while
time.sleep(SLEEP_TIME)
indicator.inc()
# wait until all the subprocesses finish
while not slots.empty():
time.sleep(SLEEP_TIME)
print ''
# wait until the reformat tool finishes
reformat_process.communicate()
if reformat_process.returncode != 0:
print >> sys.stderr, '"%s" failed' % REFORMAT_CMD[0]
sys.exit(1)
def gen_boards_cfg(jobs):
"""Generate boards.cfg file.
The incomplete boards.cfg is deleted if an error (including
the termination by the keyboard interrupt) occurs on the halfway.
Arguments:
jobs: The number of jobs to run simultaneously
"""
try:
__gen_boards_cfg(jobs)
except:
# We should remove incomplete boards.cfg
try:
os.remove(BOARD_FILE)
except OSError as exception:
# Ignore 'No such file or directory' error
if exception.errno != errno.ENOENT:
raise
raise
def main():
parser = optparse.OptionParser()
# Add options here
parser.add_option('-j', '--jobs',
help='the number of jobs to run simultaneously')
(options, args) = parser.parse_args()
if options.jobs:
try:
jobs = int(options.jobs)
except ValueError:
print >> sys.stderr, 'Option -j (--jobs) takes a number'
sys.exit(1)
else:
try:
jobs = int(subprocess.Popen(['getconf', '_NPROCESSORS_ONLN'],
stdout=subprocess.PIPE).communicate()[0])
except (OSError, ValueError):
print 'info: failed to get the number of CPUs. Set jobs to 1'
jobs = 1
gen_boards_cfg(jobs)
if __name__ == '__main__':
main()