aboutsummaryrefslogtreecommitdiff
path: root/tools/genboardscfg.py
blob: c2efad55ab4609ed17c006551b2dd0ce6eee3c1e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
#!/usr/bin/env python2
#
# Author: Masahiro Yamada <yamada.m@jp.panasonic.com>
#
# SPDX-License-Identifier:	GPL-2.0+
#

"""
Converter from Kconfig and MAINTAINERS to a board database.

Run 'tools/genboardscfg.py' to create a board database.

Run 'tools/genboardscfg.py -h' for available options.

Python 2.6 or later, but not Python 3.x is necessary to run this script.
"""

import errno
import fnmatch
import glob
import multiprocessing
import optparse
import os
import sys
import tempfile
import time

sys.path.append(os.path.join(os.path.dirname(__file__), 'buildman'))
import kconfiglib

### constant variables ###
OUTPUT_FILE = 'boards.cfg'
CONFIG_DIR = 'configs'
SLEEP_TIME = 0.03
COMMENT_BLOCK = '''#
# List of boards
#   Automatically generated by %s: don't edit
#
# Status, Arch, CPU, SoC, Vendor, Board, Target, Options, Maintainers

''' % __file__

### helper functions ###
def try_remove(f):
    """Remove a file ignoring 'No such file or directory' error."""
    try:
        os.remove(f)
    except OSError as exception:
        # Ignore 'No such file or directory' error
        if exception.errno != errno.ENOENT:
            raise

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):
            sys.exit('Please run at the top of source directory.')

def output_is_new(output):
    """Check if the output file is up to date.

    Returns:
      True if the given output file exists and is newer than any of
      *_defconfig, MAINTAINERS and Kconfig*.  False otherwise.
    """
    try:
        ctime = os.path.getctime(output)
    except OSError as exception:
        if exception.errno == errno.ENOENT:
            # return False on 'No such file or directory' error
            return False
        else:
            raise

    for (dirpath, dirnames, filenames) in os.walk(CONFIG_DIR):
        for filename in fnmatch.filter(filenames, '*_defconfig'):
            if fnmatch.fnmatch(filename, '.*'):
                continue
            filepath = os.path.join(dirpath, filename)
            if ctime < os.path.getctime(filepath):
                return False

    for (dirpath, dirnames, filenames) in os.walk('.'):
        for filename in filenames:
            if (fnmatch.fnmatch(filename, '*~') or
                not fnmatch.fnmatch(filename, 'Kconfig*') and
                not filename == 'MAINTAINERS'):
                continue
            filepath = os.path.join(dirpath, filename)
            if ctime < os.path.getctime(filepath):
                return False

    # Detect a board that has been removed since the current board database
    # was generated
    with open(output) as f:
        for line in f:
            if line[0] == '#' or line == '\n':
                continue
            defconfig = line.split()[6] + '_defconfig'
            if not os.path.exists(os.path.join(CONFIG_DIR, defconfig)):
                return False

    return True

### classes ###
class KconfigScanner:

    """Kconfig scanner."""

    ### constant variable only used in this class ###
    _SYMBOL_TABLE = {
        'arch' : 'SYS_ARCH',
        'cpu' : 'SYS_CPU',
        'soc' : 'SYS_SOC',
        'vendor' : 'SYS_VENDOR',
        'board' : 'SYS_BOARD',
        'config' : 'SYS_CONFIG_NAME',
        'options' : 'SYS_EXTRA_OPTIONS'
    }

    def __init__(self):
        """Scan all the Kconfig files and create a Config object."""
        # Define environment variables referenced from Kconfig
        os.environ['srctree'] = os.getcwd()
        os.environ['UBOOTVERSION'] = 'dummy'
        os.environ['KCONFIG_OBJDIR'] = ''
        self._conf = kconfiglib.Config()

    def __del__(self):
        """Delete a leftover temporary file before exit.

        The scan() method of this class creates a temporay file and deletes
        it on success.  If scan() method throws an exception on the way,
        the temporary file might be left over.  In that case, it should be
        deleted in this destructor.
        """
        if hasattr(self, '_tmpfile') and self._tmpfile:
            try_remove(self._tmpfile)

    def scan(self, defconfig):
        """Load a defconfig file to obtain board parameters.

        Arguments:
          defconfig: path to the defconfig file to be processed

        Returns:
          A dictionary of board parameters.  It has a form of:
          {
              'arch': <arch_name>,
              'cpu': <cpu_name>,
              'soc': <soc_name>,
              'vendor': <vendor_name>,
              'board': <board_name>,
              'target': <target_name>,
              'config': <config_header_name>,
              'options': <extra_options>
          }
        """
        # strip special prefixes and save it in a temporary file
        fd, self._tmpfile = tempfile.mkstemp()
        with os.fdopen(fd, 'w') as f:
            for line in open(defconfig):
                colon = line.find(':CONFIG_')
                if colon == -1:
                    f.write(line)
                else:
                    f.write(line[colon + 1:])

        self._conf.load_config(self._tmpfile)

        try_remove(self._tmpfile)
        self._tmpfile = None

        params = {}

        # Get the value of CONFIG_SYS_ARCH, CONFIG_SYS_CPU, ... etc.
        # Set '-' if the value is empty.
        for key, symbol in self._SYMBOL_TABLE.items():
            value = self._conf.get_symbol(symbol).get_value()
            if value:
                params[key] = value
            else:
                params[key] = '-'

        defconfig = os.path.basename(defconfig)
        params['target'], match, rear = defconfig.partition('_defconfig')
        assert match and not rear, '%s : invalid defconfig' % defconfig

        # fix-up for aarch64
        if params['arch'] == 'arm' and params['cpu'] == 'armv8':
            params['arch'] = 'aarch64'

        # fix-up options field. It should have the form:
        # <config name>[:comma separated config options]
        if params['options'] != '-':
            params['options'] = params['config'] + ':' + \
                                params['options'].replace(r'\"', '"')
        elif params['config'] != params['target']:
            params['options'] = params['config']

        return params

def scan_defconfigs_for_multiprocess(queue, defconfigs):
    """Scan defconfig files and queue their board parameters

    This function is intended to be passed to
    multiprocessing.Process() constructor.

    Arguments:
      queue: An instance of multiprocessing.Queue().
             The resulting board parameters are written into it.
      defconfigs: A sequence of defconfig files to be scanned.
    """
    kconf_scanner = KconfigScanner()
    for defconfig in defconfigs:
        queue.put(kconf_scanner.scan(defconfig))

def read_queues(queues, params_list):
    """Read the queues and append the data to the paramers list"""
    for q in queues:
        while not q.empty():
            params_list.append(q.get())

def scan_defconfigs(jobs=1):
    """Collect board parameters for all defconfig files.

    This function invokes multiple processes for faster processing.

    Arguments:
      jobs: The number of jobs to run simultaneously
    """
    all_defconfigs = []
    for (dirpath, dirnames, filenames) in os.walk(CONFIG_DIR):
        for filename in fnmatch.filter(filenames, '*_defconfig'):
            if fnmatch.fnmatch(filename, '.*'):
                continue
            all_defconfigs.append(os.path.join(dirpath, filename))

    total_boards = len(all_defconfigs)
    processes = []
    queues = []
    for i in range(jobs):
        defconfigs = all_defconfigs[total_boards * i / jobs :
                                    total_boards * (i + 1) / jobs]
        q = multiprocessing.Queue(maxsize=-1)
        p = multiprocessing.Process(target=scan_defconfigs_for_multiprocess,
                                    args=(q, defconfigs))
        p.start()
        processes.append(p)
        queues.append(q)

    # The resulting data should be accumulated to this list
    params_list = []

    # Data in the queues should be retrieved preriodically.
    # Otherwise, the queues would become full and subprocesses would get stuck.
    while any([p.is_alive() for p in processes]):
        read_queues(queues, params_list)
        # sleep for a while until the queues are filled
        time.sleep(SLEEP_TIME)

    # Joining subprocesses just in case
    # (All subprocesses should already have been finished)
    for p in processes:
        p.join()

    # retrieve leftover data
    read_queues(queues, params_list)

    return params_list

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.

        The board status is generally either 'Active' or 'Orphan'.
        Display a warning message and return '-' if status information
        is not found.

        Returns:
          'Active', 'Orphan' or '-'.
        """
        if not target in self.database:
            print >> sys.stderr, "WARNING: no status info for '%s'" % target
            return '-'

        tmp = self.database[target][0]
        if tmp.startswith('Maintained'):
            return 'Active'
        elif tmp.startswith('Orphan'):
            return 'Orphan'
        else:
            print >> sys.stderr, ("WARNING: %s: unknown status for '%s'" %
                                  (tmp, target))
            return '-'

    def get_maintainers(self, target):
        """Return the maintainers of the given board.

        Returns:
          Maintainers of the board.  If the board has two or more maintainers,
          they are separated with colons.
        """
        if not target in self.database:
            print >> sys.stderr, "WARNING: no maintainers for '%s'" % target
            return ''

        return ':'.join(self.database[target][1])

    def parse_file(self, file):
        """Parse a MAINTAINERS file.

        Parse a MAINTAINERS file and accumulates board status and
        maintainers information.

        Arguments:
          file: MAINTAINERS file to be parsed
        """
        targets = []
        maintainers = []
        status = '-'
        for line in open(file):
            # Check also commented maintainers
            if line[:3] == '#M:':
                line = line[1:]
            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':
                for target in targets:
                    self.database[target] = (status, maintainers)
                targets = []
                maintainers = []
                status = '-'
        if targets:
            for target in targets:
                self.database[target] = (status, maintainers)

def insert_maintainers_info(params_list):
    """Add Status and Maintainers information to the board parameters list.

    Arguments:
      params_list: A list of the board parameters
    """
    database = MaintainersDatabase()
    for (dirpath, dirnames, filenames) in os.walk('.'):
        if 'MAINTAINERS' in filenames:
            database.parse_file(os.path.join(dirpath, 'MAINTAINERS'))

    for i, params in enumerate(params_list):
        target = params['target']
        params['status'] = database.get_status(target)
        params['maintainers'] = database.get_maintainers(target)
        params_list[i] = params

def format_and_output(params_list, output):
    """Write board parameters into a file.

    Columnate the board parameters, sort lines alphabetically,
    and then write them to a file.

    Arguments:
      params_list: The list of board parameters
      output: The path to the output file
    """
    FIELDS = ('status', 'arch', 'cpu', 'soc', 'vendor', 'board', 'target',
              'options', 'maintainers')

    # First, decide the width of each column
    max_length = dict([ (f, 0) for f in FIELDS])
    for params in params_list:
        for f in FIELDS:
            max_length[f] = max(max_length[f], len(params[f]))

    output_lines = []
    for params in params_list:
        line = ''
        for f in FIELDS:
            # insert two spaces between fields like column -t would
            line += '  ' + params[f].ljust(max_length[f])
        output_lines.append(line.strip())

    # ignore case when sorting
    output_lines.sort(key=str.lower)

    with open(output, 'w') as f:
        f.write(COMMENT_BLOCK + '\n'.join(output_lines) + '\n')

def gen_boards_cfg(output, jobs=1, force=False):
    """Generate a board database file.

    Arguments:
      output: The name of the output file
      jobs: The number of jobs to run simultaneously
      force: Force to generate the output even if it is new
    """
    check_top_directory()

    if not force and output_is_new(output):
        print "%s is up to date. Nothing to do." % output
        sys.exit(0)

    params_list = scan_defconfigs(jobs)
    insert_maintainers_info(params_list)
    format_and_output(params_list, output)

def main():
    try:
        cpu_count = multiprocessing.cpu_count()
    except NotImplementedError:
        cpu_count = 1

    parser = optparse.OptionParser()
    # Add options here
    parser.add_option('-f', '--force', action="store_true", default=False,
                      help='regenerate the output even if it is new')
    parser.add_option('-j', '--jobs', type='int', default=cpu_count,
                      help='the number of jobs to run simultaneously')
    parser.add_option('-o', '--output', default=OUTPUT_FILE,
                      help='output file [default=%s]' % OUTPUT_FILE)
    (options, args) = parser.parse_args()

    gen_boards_cfg(options.output, jobs=options.jobs, force=options.force)

if __name__ == '__main__':
    main()