aboutsummaryrefslogtreecommitdiff
path: root/tools/genboardscfg.py
blob: a0df7058b15b3e8b98e2c65d7df63c969696eff2 (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
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
#!/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, 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 '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):
            sys.exit('Please run at the top of source directory.')

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:
        sys.exit('GNU Make not found')
    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'
        """
        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.

        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 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':
                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, (
                    "WARNING: '%s' is not defined in '%s'. Skip." %
                    (field, defconfig))
                return

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

        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"""
        if not self.occupied:
            while self.ps.poll() == None:
                pass
        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
        if self.ps.poll() == 0:
            self.parser.parse(self.defconfig)
        else:
            print >> sys.stderr, ("WARNING: failed to process '%s'. skip." %
                                  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'):
            if fnmatch.fnmatch(filename, '.*'):
                continue
            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:
        sys.exit('"%s" failed' % REFORMAT_CMD[0])

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:
            sys.exit('Option -j (--jobs) takes a number')
    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()