445 lines
14 KiB
Python
Executable File
445 lines
14 KiB
Python
Executable File
#!/usr/bin/env python2
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#
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# Author: Masahiro Yamada <yamada.m@jp.panasonic.com>
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#
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# SPDX-License-Identifier: GPL-2.0+
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#
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"""
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Converter from Kconfig and MAINTAINERS to a board database.
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Run 'tools/genboardscfg.py' to create a board database.
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Run 'tools/genboardscfg.py -h' for available options.
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Python 2.6 or later, but not Python 3.x is necessary to run this script.
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"""
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import errno
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import fnmatch
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import glob
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import multiprocessing
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import optparse
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import os
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import subprocess
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import sys
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import tempfile
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import time
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sys.path.append(os.path.join(os.path.dirname(__file__), 'buildman'))
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import kconfiglib
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### constant variables ###
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OUTPUT_FILE = 'boards.cfg'
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CONFIG_DIR = 'configs'
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SLEEP_TIME = 0.03
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COMMENT_BLOCK = '''#
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# List of boards
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# Automatically generated by %s: don't edit
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#
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# Status, Arch, CPU, SoC, Vendor, Board, Target, Options, Maintainers
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''' % __file__
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### helper functions ###
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def try_remove(f):
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"""Remove a file ignoring 'No such file or directory' error."""
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try:
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os.remove(f)
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except OSError as exception:
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# Ignore 'No such file or directory' error
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if exception.errno != errno.ENOENT:
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raise
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def check_top_directory():
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"""Exit if we are not at the top of source directory."""
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for f in ('README', 'Licenses'):
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if not os.path.exists(f):
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sys.exit('Please run at the top of source directory.')
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def output_is_new(output):
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"""Check if the output file is up to date.
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Returns:
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True if the given output file exists and is newer than any of
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*_defconfig, MAINTAINERS and Kconfig*. False otherwise.
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"""
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try:
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ctime = os.path.getctime(output)
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except OSError as exception:
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if exception.errno == errno.ENOENT:
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# return False on 'No such file or directory' error
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return False
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else:
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raise
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for (dirpath, dirnames, filenames) in os.walk(CONFIG_DIR):
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for filename in fnmatch.filter(filenames, '*_defconfig'):
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if fnmatch.fnmatch(filename, '.*'):
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continue
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filepath = os.path.join(dirpath, filename)
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if ctime < os.path.getctime(filepath):
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return False
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for (dirpath, dirnames, filenames) in os.walk('.'):
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for filename in filenames:
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if (fnmatch.fnmatch(filename, '*~') or
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not fnmatch.fnmatch(filename, 'Kconfig*') and
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not filename == 'MAINTAINERS'):
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continue
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filepath = os.path.join(dirpath, filename)
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if ctime < os.path.getctime(filepath):
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return False
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# Detect a board that has been removed since the current board database
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# was generated
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with open(output) as f:
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for line in f:
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if line[0] == '#' or line == '\n':
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continue
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defconfig = line.split()[6] + '_defconfig'
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if not os.path.exists(os.path.join(CONFIG_DIR, defconfig)):
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return False
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return True
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### classes ###
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class KconfigScanner:
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"""Kconfig scanner."""
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### constant variable only used in this class ###
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_SYMBOL_TABLE = {
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'arch' : 'SYS_ARCH',
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'cpu' : 'SYS_CPU',
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'soc' : 'SYS_SOC',
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'vendor' : 'SYS_VENDOR',
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'board' : 'SYS_BOARD',
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'config' : 'SYS_CONFIG_NAME',
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'options' : 'SYS_EXTRA_OPTIONS'
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}
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def __init__(self):
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"""Scan all the Kconfig files and create a Config object."""
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# Define environment variables referenced from Kconfig
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os.environ['srctree'] = os.getcwd()
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os.environ['UBOOTVERSION'] = 'dummy'
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os.environ['KCONFIG_OBJDIR'] = ''
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self._conf = kconfiglib.Config()
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def __del__(self):
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"""Delete a leftover temporary file before exit.
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The scan() method of this class creates a temporay file and deletes
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it on success. If scan() method throws an exception on the way,
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the temporary file might be left over. In that case, it should be
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deleted in this destructor.
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"""
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if hasattr(self, '_tmpfile') and self._tmpfile:
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try_remove(self._tmpfile)
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def scan(self, defconfig):
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"""Load a defconfig file to obtain board parameters.
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Arguments:
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defconfig: path to the defconfig file to be processed
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Returns:
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A dictionary of board parameters. It has a form of:
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{
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'arch': <arch_name>,
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'cpu': <cpu_name>,
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'soc': <soc_name>,
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'vendor': <vendor_name>,
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'board': <board_name>,
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'target': <target_name>,
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'config': <config_header_name>,
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'options': <extra_options>
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}
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"""
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# strip special prefixes and save it in a temporary file
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fd, self._tmpfile = tempfile.mkstemp()
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with os.fdopen(fd, 'w') as f:
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for line in open(defconfig):
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colon = line.find(':CONFIG_')
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if colon == -1:
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f.write(line)
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else:
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f.write(line[colon + 1:])
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self._conf.load_config(self._tmpfile)
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try_remove(self._tmpfile)
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self._tmpfile = None
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params = {}
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# Get the value of CONFIG_SYS_ARCH, CONFIG_SYS_CPU, ... etc.
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# Set '-' if the value is empty.
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for key, symbol in self._SYMBOL_TABLE.items():
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value = self._conf.get_symbol(symbol).get_value()
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if value:
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params[key] = value
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else:
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params[key] = '-'
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defconfig = os.path.basename(defconfig)
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params['target'], match, rear = defconfig.partition('_defconfig')
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assert match and not rear, '%s : invalid defconfig' % defconfig
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# fix-up for aarch64
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if params['arch'] == 'arm' and params['cpu'] == 'armv8':
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params['arch'] = 'aarch64'
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# fix-up options field. It should have the form:
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# <config name>[:comma separated config options]
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if params['options'] != '-':
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params['options'] = params['config'] + ':' + \
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params['options'].replace(r'\"', '"')
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elif params['config'] != params['target']:
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params['options'] = params['config']
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return params
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def scan_defconfigs_for_multiprocess(queue, defconfigs):
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"""Scan defconfig files and queue their board parameters
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This function is intended to be passed to
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multiprocessing.Process() constructor.
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Arguments:
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queue: An instance of multiprocessing.Queue().
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The resulting board parameters are written into it.
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defconfigs: A sequence of defconfig files to be scanned.
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"""
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kconf_scanner = KconfigScanner()
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for defconfig in defconfigs:
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queue.put(kconf_scanner.scan(defconfig))
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def read_queues(queues, params_list):
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"""Read the queues and append the data to the paramers list"""
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for q in queues:
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while not q.empty():
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params_list.append(q.get())
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def scan_defconfigs(jobs=1):
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"""Collect board parameters for all defconfig files.
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This function invokes multiple processes for faster processing.
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Arguments:
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jobs: The number of jobs to run simultaneously
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"""
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all_defconfigs = []
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for (dirpath, dirnames, filenames) in os.walk(CONFIG_DIR):
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for filename in fnmatch.filter(filenames, '*_defconfig'):
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if fnmatch.fnmatch(filename, '.*'):
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continue
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all_defconfigs.append(os.path.join(dirpath, filename))
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total_boards = len(all_defconfigs)
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processes = []
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queues = []
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for i in range(jobs):
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defconfigs = all_defconfigs[total_boards * i / jobs :
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total_boards * (i + 1) / jobs]
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q = multiprocessing.Queue(maxsize=-1)
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p = multiprocessing.Process(target=scan_defconfigs_for_multiprocess,
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args=(q, defconfigs))
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p.start()
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processes.append(p)
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queues.append(q)
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# The resulting data should be accumulated to this list
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params_list = []
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# Data in the queues should be retrieved preriodically.
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# Otherwise, the queues would become full and subprocesses would get stuck.
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while any([p.is_alive() for p in processes]):
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read_queues(queues, params_list)
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# sleep for a while until the queues are filled
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time.sleep(SLEEP_TIME)
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# Joining subprocesses just in case
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# (All subprocesses should already have been finished)
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for p in processes:
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p.join()
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# retrieve leftover data
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read_queues(queues, params_list)
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return params_list
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class MaintainersDatabase:
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"""The database of board status and maintainers."""
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def __init__(self):
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"""Create an empty database."""
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self.database = {}
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def get_status(self, target):
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"""Return the status of the given board.
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The board status is generally either 'Active' or 'Orphan'.
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Display a warning message and return '-' if status information
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is not found.
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Returns:
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'Active', 'Orphan' or '-'.
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"""
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if not target in self.database:
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print >> sys.stderr, "WARNING: no status info for '%s'" % target
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return '-'
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tmp = self.database[target][0]
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if tmp.startswith('Maintained'):
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return 'Active'
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elif tmp.startswith('Orphan'):
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return 'Orphan'
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else:
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print >> sys.stderr, ("WARNING: %s: unknown status for '%s'" %
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(tmp, target))
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return '-'
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def get_maintainers(self, target):
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"""Return the maintainers of the given board.
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Returns:
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Maintainers of the board. If the board has two or more maintainers,
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they are separated with colons.
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"""
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if not target in self.database:
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print >> sys.stderr, "WARNING: no maintainers for '%s'" % target
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return ''
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return ':'.join(self.database[target][1])
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def parse_file(self, file):
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"""Parse a MAINTAINERS file.
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Parse a MAINTAINERS file and accumulates board status and
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maintainers information.
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Arguments:
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file: MAINTAINERS file to be parsed
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"""
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targets = []
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maintainers = []
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status = '-'
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for line in open(file):
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# Check also commented maintainers
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if line[:3] == '#M:':
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line = line[1:]
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tag, rest = line[:2], line[2:].strip()
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if tag == 'M:':
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maintainers.append(rest)
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elif tag == 'F:':
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# expand wildcard and filter by 'configs/*_defconfig'
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for f in glob.glob(rest):
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front, match, rear = f.partition('configs/')
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if not front and match:
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front, match, rear = rear.rpartition('_defconfig')
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if match and not rear:
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targets.append(front)
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elif tag == 'S:':
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status = rest
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elif line == '\n':
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for target in targets:
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self.database[target] = (status, maintainers)
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targets = []
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maintainers = []
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status = '-'
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if targets:
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for target in targets:
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self.database[target] = (status, maintainers)
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def insert_maintainers_info(params_list):
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"""Add Status and Maintainers information to the board parameters list.
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Arguments:
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params_list: A list of the board parameters
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"""
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database = MaintainersDatabase()
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for (dirpath, dirnames, filenames) in os.walk('.'):
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if 'MAINTAINERS' in filenames:
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database.parse_file(os.path.join(dirpath, 'MAINTAINERS'))
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for i, params in enumerate(params_list):
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target = params['target']
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params['status'] = database.get_status(target)
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params['maintainers'] = database.get_maintainers(target)
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params_list[i] = params
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def format_and_output(params_list, output):
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"""Write board parameters into a file.
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Columnate the board parameters, sort lines alphabetically,
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and then write them to a file.
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Arguments:
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params_list: The list of board parameters
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output: The path to the output file
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"""
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FIELDS = ('status', 'arch', 'cpu', 'soc', 'vendor', 'board', 'target',
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'options', 'maintainers')
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# First, decide the width of each column
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max_length = dict([ (f, 0) for f in FIELDS])
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for params in params_list:
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for f in FIELDS:
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max_length[f] = max(max_length[f], len(params[f]))
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output_lines = []
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for params in params_list:
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line = ''
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for f in FIELDS:
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# insert two spaces between fields like column -t would
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line += ' ' + params[f].ljust(max_length[f])
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output_lines.append(line.strip())
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# ignore case when sorting
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output_lines.sort(key=str.lower)
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with open(output, 'w') as f:
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f.write(COMMENT_BLOCK + '\n'.join(output_lines) + '\n')
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def gen_boards_cfg(output, jobs=1, force=False):
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"""Generate a board database file.
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Arguments:
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output: The name of the output file
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jobs: The number of jobs to run simultaneously
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force: Force to generate the output even if it is new
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"""
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check_top_directory()
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if not force and output_is_new(output):
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print "%s is up to date. Nothing to do." % output
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sys.exit(0)
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params_list = scan_defconfigs(jobs)
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insert_maintainers_info(params_list)
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format_and_output(params_list, output)
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def main():
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try:
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cpu_count = multiprocessing.cpu_count()
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except NotImplementedError:
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cpu_count = 1
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parser = optparse.OptionParser()
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# Add options here
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parser.add_option('-f', '--force', action="store_true", default=False,
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help='regenerate the output even if it is new')
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parser.add_option('-j', '--jobs', type='int', default=cpu_count,
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help='the number of jobs to run simultaneously')
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parser.add_option('-o', '--output', default=OUTPUT_FILE,
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help='output file [default=%s]' % OUTPUT_FILE)
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(options, args) = parser.parse_args()
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gen_boards_cfg(options.output, jobs=options.jobs, force=options.force)
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if __name__ == '__main__':
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main()
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