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1#!/usr/bin/env python2
2# SPDX-License-Identifier: GPL-2.0+
3#
4# Author: Masahiro Yamada <yamada.masahiro@socionext.com>
5#
6
7"""
8Move config options from headers to defconfig files.
9
10Since Kconfig was introduced to U-Boot, we have worked on moving
11config options from headers to Kconfig (defconfig).
12
13This tool intends to help this tremendous work.
14
15
16Usage
17-----
18
19First, you must edit the Kconfig to add the menu entries for the configs
20you are moving.
21
22And then run this tool giving CONFIG names you want to move.
23For example, if you want to move CONFIG_CMD_USB and CONFIG_SYS_TEXT_BASE,
24simply type as follows:
25
26  $ tools/moveconfig.py CONFIG_CMD_USB CONFIG_SYS_TEXT_BASE
27
28The tool walks through all the defconfig files and move the given CONFIGs.
29
30The log is also displayed on the terminal.
31
32The log is printed for each defconfig as follows:
33
34<defconfig_name>
35    <action1>
36    <action2>
37    <action3>
38    ...
39
40<defconfig_name> is the name of the defconfig.
41
42<action*> shows what the tool did for that defconfig.
43It looks like one of the following:
44
45 - Move 'CONFIG_... '
46   This config option was moved to the defconfig
47
48 - CONFIG_... is not defined in Kconfig.  Do nothing.
49   The entry for this CONFIG was not found in Kconfig.  The option is not
50   defined in the config header, either.  So, this case can be just skipped.
51
52 - CONFIG_... is not defined in Kconfig (suspicious).  Do nothing.
53   This option is defined in the config header, but its entry was not found
54   in Kconfig.
55   There are two common cases:
56     - You forgot to create an entry for the CONFIG before running
57       this tool, or made a typo in a CONFIG passed to this tool.
58     - The entry was hidden due to unmet 'depends on'.
59   The tool does not know if the result is reasonable, so please check it
60   manually.
61
62 - 'CONFIG_...' is the same as the define in Kconfig.  Do nothing.
63   The define in the config header matched the one in Kconfig.
64   We do not need to touch it.
65
66 - Compiler is missing.  Do nothing.
67   The compiler specified for this architecture was not found
68   in your PATH environment.
69   (If -e option is passed, the tool exits immediately.)
70
71 - Failed to process.
72   An error occurred during processing this defconfig.  Skipped.
73   (If -e option is passed, the tool exits immediately on error.)
74
75Finally, you will be asked, Clean up headers? [y/n]:
76
77If you say 'y' here, the unnecessary config defines are removed
78from the config headers (include/configs/*.h).
79It just uses the regex method, so you should not rely on it.
80Just in case, please do 'git diff' to see what happened.
81
82
83How does it work?
84-----------------
85
86This tool runs configuration and builds include/autoconf.mk for every
87defconfig.  The config options defined in Kconfig appear in the .config
88file (unless they are hidden because of unmet dependency.)
89On the other hand, the config options defined by board headers are seen
90in include/autoconf.mk.  The tool looks for the specified options in both
91of them to decide the appropriate action for the options.  If the given
92config option is found in the .config, but its value does not match the
93one from the board header, the config option in the .config is replaced
94with the define in the board header.  Then, the .config is synced by
95"make savedefconfig" and the defconfig is updated with it.
96
97For faster processing, this tool handles multi-threading.  It creates
98separate build directories where the out-of-tree build is run.  The
99temporary build directories are automatically created and deleted as
100needed.  The number of threads are chosen based on the number of the CPU
101cores of your system although you can change it via -j (--jobs) option.
102
103
104Toolchains
105----------
106
107Appropriate toolchain are necessary to generate include/autoconf.mk
108for all the architectures supported by U-Boot.  Most of them are available
109at the kernel.org site, some are not provided by kernel.org. This tool uses
110the same tools as buildman, so see that tool for setup (e.g. --fetch-arch).
111
112
113Tips and trips
114--------------
115
116To sync only X86 defconfigs:
117
118   ./tools/moveconfig.py -s -d <(grep -l X86 configs/*)
119
120or:
121
122   grep -l X86 configs/* | ./tools/moveconfig.py -s -d -
123
124To process CONFIG_CMD_FPGAD only for a subset of configs based on path match:
125
126   ls configs/{hrcon*,iocon*,strider*} | \
127       ./tools/moveconfig.py -Cy CONFIG_CMD_FPGAD -d -
128
129
130Finding implied CONFIGs
131-----------------------
132
133Some CONFIG options can be implied by others and this can help to reduce
134the size of the defconfig files. For example, CONFIG_X86 implies
135CONFIG_CMD_IRQ, so we can put 'imply CMD_IRQ' under 'config X86' and
136all x86 boards will have that option, avoiding adding CONFIG_CMD_IRQ to
137each of the x86 defconfig files.
138
139This tool can help find such configs. To use it, first build a database:
140
141    ./tools/moveconfig.py -b
142
143Then try to query it:
144
145    ./tools/moveconfig.py -i CONFIG_CMD_IRQ
146    CONFIG_CMD_IRQ found in 311/2384 defconfigs
147    44 : CONFIG_SYS_FSL_ERRATUM_IFC_A002769
148    41 : CONFIG_SYS_FSL_ERRATUM_A007075
149    31 : CONFIG_SYS_FSL_DDR_VER_44
150    28 : CONFIG_ARCH_P1010
151    28 : CONFIG_SYS_FSL_ERRATUM_P1010_A003549
152    28 : CONFIG_SYS_FSL_ERRATUM_SEC_A003571
153    28 : CONFIG_SYS_FSL_ERRATUM_IFC_A003399
154    25 : CONFIG_SYS_FSL_ERRATUM_A008044
155    22 : CONFIG_ARCH_P1020
156    21 : CONFIG_SYS_FSL_DDR_VER_46
157    20 : CONFIG_MAX_PIRQ_LINKS
158    20 : CONFIG_HPET_ADDRESS
159    20 : CONFIG_X86
160    20 : CONFIG_PCIE_ECAM_SIZE
161    20 : CONFIG_IRQ_SLOT_COUNT
162    20 : CONFIG_I8259_PIC
163    20 : CONFIG_CPU_ADDR_BITS
164    20 : CONFIG_RAMBASE
165    20 : CONFIG_SYS_FSL_ERRATUM_A005871
166    20 : CONFIG_PCIE_ECAM_BASE
167    20 : CONFIG_X86_TSC_TIMER
168    20 : CONFIG_I8254_TIMER
169    20 : CONFIG_CMD_GETTIME
170    19 : CONFIG_SYS_FSL_ERRATUM_A005812
171    18 : CONFIG_X86_RUN_32BIT
172    17 : CONFIG_CMD_CHIP_CONFIG
173    ...
174
175This shows a list of config options which might imply CONFIG_CMD_EEPROM along
176with how many defconfigs they cover. From this you can see that CONFIG_X86
177implies CONFIG_CMD_EEPROM. Therefore, instead of adding CONFIG_CMD_EEPROM to
178the defconfig of every x86 board, you could add a single imply line to the
179Kconfig file:
180
181    config X86
182        bool "x86 architecture"
183        ...
184        imply CMD_EEPROM
185
186That will cover 20 defconfigs. Many of the options listed are not suitable as
187they are not related. E.g. it would be odd for CONFIG_CMD_GETTIME to imply
188CMD_EEPROM.
189
190Using this search you can reduce the size of moveconfig patches.
191
192You can automatically add 'imply' statements in the Kconfig with the -a
193option:
194
195    ./tools/moveconfig.py -s -i CONFIG_SCSI \
196            -a CONFIG_ARCH_LS1021A,CONFIG_ARCH_LS1043A
197
198This will add 'imply SCSI' to the two CONFIG options mentioned, assuming that
199the database indicates that they do actually imply CONFIG_SCSI and do not
200already have an 'imply SCSI'.
201
202The output shows where the imply is added:
203
204   18 : CONFIG_ARCH_LS1021A       arch/arm/cpu/armv7/ls102xa/Kconfig:1
205   13 : CONFIG_ARCH_LS1043A       arch/arm/cpu/armv8/fsl-layerscape/Kconfig:11
206   12 : CONFIG_ARCH_LS1046A       arch/arm/cpu/armv8/fsl-layerscape/Kconfig:31
207
208The first number is the number of boards which can avoid having a special
209CONFIG_SCSI option in their defconfig file if this 'imply' is added.
210The location at the right is the Kconfig file and line number where the config
211appears. For example, adding 'imply CONFIG_SCSI' to the 'config ARCH_LS1021A'
212in arch/arm/cpu/armv7/ls102xa/Kconfig at line 1 will help 18 boards to reduce
213the size of their defconfig files.
214
215If you want to add an 'imply' to every imply config in the list, you can use
216
217    ./tools/moveconfig.py -s -i CONFIG_SCSI -a all
218
219To control which ones are displayed, use -I <list> where list is a list of
220options (use '-I help' to see possible options and their meaning).
221
222To skip showing you options that already have an 'imply' attached, use -A.
223
224When you have finished adding 'imply' options you can regenerate the
225defconfig files for affected boards with something like:
226
227    git show --stat | ./tools/moveconfig.py -s -d -
228
229This will regenerate only those defconfigs changed in the current commit.
230If you start with (say) 100 defconfigs being changed in the commit, and add
231a few 'imply' options as above, then regenerate, hopefully you can reduce the
232number of defconfigs changed in the commit.
233
234
235Available options
236-----------------
237
238 -c, --color
239   Surround each portion of the log with escape sequences to display it
240   in color on the terminal.
241
242 -C, --commit
243   Create a git commit with the changes when the operation is complete. A
244   standard commit message is used which may need to be edited.
245
246 -d, --defconfigs
247  Specify a file containing a list of defconfigs to move.  The defconfig
248  files can be given with shell-style wildcards. Use '-' to read from stdin.
249
250 -n, --dry-run
251   Perform a trial run that does not make any changes.  It is useful to
252   see what is going to happen before one actually runs it.
253
254 -e, --exit-on-error
255   Exit immediately if Make exits with a non-zero status while processing
256   a defconfig file.
257
258 -s, --force-sync
259   Do "make savedefconfig" forcibly for all the defconfig files.
260   If not specified, "make savedefconfig" only occurs for cases
261   where at least one CONFIG was moved.
262
263 -S, --spl
264   Look for moved config options in spl/include/autoconf.mk instead of
265   include/autoconf.mk.  This is useful for moving options for SPL build
266   because SPL related options (mostly prefixed with CONFIG_SPL_) are
267   sometimes blocked by CONFIG_SPL_BUILD ifdef conditionals.
268
269 -H, --headers-only
270   Only cleanup the headers; skip the defconfig processing
271
272 -j, --jobs
273   Specify the number of threads to run simultaneously.  If not specified,
274   the number of threads is the same as the number of CPU cores.
275
276 -r, --git-ref
277   Specify the git ref to clone for building the autoconf.mk. If unspecified
278   use the CWD. This is useful for when changes to the Kconfig affect the
279   default values and you want to capture the state of the defconfig from
280   before that change was in effect. If in doubt, specify a ref pre-Kconfig
281   changes (use HEAD if Kconfig changes are not committed). Worst case it will
282   take a bit longer to run, but will always do the right thing.
283
284 -v, --verbose
285   Show any build errors as boards are built
286
287 -y, --yes
288   Instead of prompting, automatically go ahead with all operations. This
289   includes cleaning up headers, CONFIG_SYS_EXTRA_OPTIONS, the config whitelist
290   and the README.
291
292To see the complete list of supported options, run
293
294  $ tools/moveconfig.py -h
295
296"""
297
298import collections
299import copy
300import difflib
301import filecmp
302import fnmatch
303import glob
304import multiprocessing
305import optparse
306import os
307import Queue
308import re
309import shutil
310import subprocess
311import sys
312import tempfile
313import threading
314import time
315
316sys.path.append(os.path.join(os.path.dirname(__file__), 'buildman'))
317sys.path.append(os.path.join(os.path.dirname(__file__), 'patman'))
318import bsettings
319import kconfiglib
320import toolchain
321
322SHOW_GNU_MAKE = 'scripts/show-gnu-make'
323SLEEP_TIME=0.03
324
325STATE_IDLE = 0
326STATE_DEFCONFIG = 1
327STATE_AUTOCONF = 2
328STATE_SAVEDEFCONFIG = 3
329
330ACTION_MOVE = 0
331ACTION_NO_ENTRY = 1
332ACTION_NO_ENTRY_WARN = 2
333ACTION_NO_CHANGE = 3
334
335COLOR_BLACK        = '0;30'
336COLOR_RED          = '0;31'
337COLOR_GREEN        = '0;32'
338COLOR_BROWN        = '0;33'
339COLOR_BLUE         = '0;34'
340COLOR_PURPLE       = '0;35'
341COLOR_CYAN         = '0;36'
342COLOR_LIGHT_GRAY   = '0;37'
343COLOR_DARK_GRAY    = '1;30'
344COLOR_LIGHT_RED    = '1;31'
345COLOR_LIGHT_GREEN  = '1;32'
346COLOR_YELLOW       = '1;33'
347COLOR_LIGHT_BLUE   = '1;34'
348COLOR_LIGHT_PURPLE = '1;35'
349COLOR_LIGHT_CYAN   = '1;36'
350COLOR_WHITE        = '1;37'
351
352AUTO_CONF_PATH = 'include/config/auto.conf'
353CONFIG_DATABASE = 'moveconfig.db'
354
355CONFIG_LEN = len('CONFIG_')
356
357### helper functions ###
358def get_devnull():
359    """Get the file object of '/dev/null' device."""
360    try:
361        devnull = subprocess.DEVNULL # py3k
362    except AttributeError:
363        devnull = open(os.devnull, 'wb')
364    return devnull
365
366def check_top_directory():
367    """Exit if we are not at the top of source directory."""
368    for f in ('README', 'Licenses'):
369        if not os.path.exists(f):
370            sys.exit('Please run at the top of source directory.')
371
372def check_clean_directory():
373    """Exit if the source tree is not clean."""
374    for f in ('.config', 'include/config'):
375        if os.path.exists(f):
376            sys.exit("source tree is not clean, please run 'make mrproper'")
377
378def get_make_cmd():
379    """Get the command name of GNU Make.
380
381    U-Boot needs GNU Make for building, but the command name is not
382    necessarily "make". (for example, "gmake" on FreeBSD).
383    Returns the most appropriate command name on your system.
384    """
385    process = subprocess.Popen([SHOW_GNU_MAKE], stdout=subprocess.PIPE)
386    ret = process.communicate()
387    if process.returncode:
388        sys.exit('GNU Make not found')
389    return ret[0].rstrip()
390
391def get_matched_defconfig(line):
392    """Get the defconfig files that match a pattern
393
394    Args:
395        line: Path or filename to match, e.g. 'configs/snow_defconfig' or
396            'k2*_defconfig'. If no directory is provided, 'configs/' is
397            prepended
398
399    Returns:
400        a list of matching defconfig files
401    """
402    dirname = os.path.dirname(line)
403    if dirname:
404        pattern = line
405    else:
406        pattern = os.path.join('configs', line)
407    return glob.glob(pattern) + glob.glob(pattern + '_defconfig')
408
409def get_matched_defconfigs(defconfigs_file):
410    """Get all the defconfig files that match the patterns in a file.
411
412    Args:
413        defconfigs_file: File containing a list of defconfigs to process, or
414            '-' to read the list from stdin
415
416    Returns:
417        A list of paths to defconfig files, with no duplicates
418    """
419    defconfigs = []
420    if defconfigs_file == '-':
421        fd = sys.stdin
422        defconfigs_file = 'stdin'
423    else:
424        fd = open(defconfigs_file)
425    for i, line in enumerate(fd):
426        line = line.strip()
427        if not line:
428            continue # skip blank lines silently
429        if ' ' in line:
430            line = line.split(' ')[0]  # handle 'git log' input
431        matched = get_matched_defconfig(line)
432        if not matched:
433            print >> sys.stderr, "warning: %s:%d: no defconfig matched '%s'" % \
434                                                 (defconfigs_file, i + 1, line)
435
436        defconfigs += matched
437
438    # use set() to drop multiple matching
439    return [ defconfig[len('configs') + 1:]  for defconfig in set(defconfigs) ]
440
441def get_all_defconfigs():
442    """Get all the defconfig files under the configs/ directory."""
443    defconfigs = []
444    for (dirpath, dirnames, filenames) in os.walk('configs'):
445        dirpath = dirpath[len('configs') + 1:]
446        for filename in fnmatch.filter(filenames, '*_defconfig'):
447            defconfigs.append(os.path.join(dirpath, filename))
448
449    return defconfigs
450
451def color_text(color_enabled, color, string):
452    """Return colored string."""
453    if color_enabled:
454        # LF should not be surrounded by the escape sequence.
455        # Otherwise, additional whitespace or line-feed might be printed.
456        return '\n'.join([ '\033[' + color + 'm' + s + '\033[0m' if s else ''
457                           for s in string.split('\n') ])
458    else:
459        return string
460
461def show_diff(a, b, file_path, color_enabled):
462    """Show unidified diff.
463
464    Arguments:
465      a: A list of lines (before)
466      b: A list of lines (after)
467      file_path: Path to the file
468      color_enabled: Display the diff in color
469    """
470
471    diff = difflib.unified_diff(a, b,
472                                fromfile=os.path.join('a', file_path),
473                                tofile=os.path.join('b', file_path))
474
475    for line in diff:
476        if line[0] == '-' and line[1] != '-':
477            print color_text(color_enabled, COLOR_RED, line),
478        elif line[0] == '+' and line[1] != '+':
479            print color_text(color_enabled, COLOR_GREEN, line),
480        else:
481            print line,
482
483def extend_matched_lines(lines, matched, pre_patterns, post_patterns, extend_pre,
484                         extend_post):
485    """Extend matched lines if desired patterns are found before/after already
486    matched lines.
487
488    Arguments:
489      lines: A list of lines handled.
490      matched: A list of line numbers that have been already matched.
491               (will be updated by this function)
492      pre_patterns: A list of regular expression that should be matched as
493                    preamble.
494      post_patterns: A list of regular expression that should be matched as
495                     postamble.
496      extend_pre: Add the line number of matched preamble to the matched list.
497      extend_post: Add the line number of matched postamble to the matched list.
498    """
499    extended_matched = []
500
501    j = matched[0]
502
503    for i in matched:
504        if i == 0 or i < j:
505            continue
506        j = i
507        while j in matched:
508            j += 1
509        if j >= len(lines):
510            break
511
512        for p in pre_patterns:
513            if p.search(lines[i - 1]):
514                break
515        else:
516            # not matched
517            continue
518
519        for p in post_patterns:
520            if p.search(lines[j]):
521                break
522        else:
523            # not matched
524            continue
525
526        if extend_pre:
527            extended_matched.append(i - 1)
528        if extend_post:
529            extended_matched.append(j)
530
531    matched += extended_matched
532    matched.sort()
533
534def confirm(options, prompt):
535    if not options.yes:
536        while True:
537            choice = raw_input('{} [y/n]: '.format(prompt))
538            choice = choice.lower()
539            print choice
540            if choice == 'y' or choice == 'n':
541                break
542
543        if choice == 'n':
544            return False
545
546    return True
547
548def cleanup_one_header(header_path, patterns, options):
549    """Clean regex-matched lines away from a file.
550
551    Arguments:
552      header_path: path to the cleaned file.
553      patterns: list of regex patterns.  Any lines matching to these
554                patterns are deleted.
555      options: option flags.
556    """
557    with open(header_path) as f:
558        lines = f.readlines()
559
560    matched = []
561    for i, line in enumerate(lines):
562        if i - 1 in matched and lines[i - 1][-2:] == '\\\n':
563            matched.append(i)
564            continue
565        for pattern in patterns:
566            if pattern.search(line):
567                matched.append(i)
568                break
569
570    if not matched:
571        return
572
573    # remove empty #ifdef ... #endif, successive blank lines
574    pattern_if = re.compile(r'#\s*if(def|ndef)?\W') #  #if, #ifdef, #ifndef
575    pattern_elif = re.compile(r'#\s*el(if|se)\W')   #  #elif, #else
576    pattern_endif = re.compile(r'#\s*endif\W')      #  #endif
577    pattern_blank = re.compile(r'^\s*$')            #  empty line
578
579    while True:
580        old_matched = copy.copy(matched)
581        extend_matched_lines(lines, matched, [pattern_if],
582                             [pattern_endif], True, True)
583        extend_matched_lines(lines, matched, [pattern_elif],
584                             [pattern_elif, pattern_endif], True, False)
585        extend_matched_lines(lines, matched, [pattern_if, pattern_elif],
586                             [pattern_blank], False, True)
587        extend_matched_lines(lines, matched, [pattern_blank],
588                             [pattern_elif, pattern_endif], True, False)
589        extend_matched_lines(lines, matched, [pattern_blank],
590                             [pattern_blank], True, False)
591        if matched == old_matched:
592            break
593
594    tolines = copy.copy(lines)
595
596    for i in reversed(matched):
597        tolines.pop(i)
598
599    show_diff(lines, tolines, header_path, options.color)
600
601    if options.dry_run:
602        return
603
604    with open(header_path, 'w') as f:
605        for line in tolines:
606            f.write(line)
607
608def cleanup_headers(configs, options):
609    """Delete config defines from board headers.
610
611    Arguments:
612      configs: A list of CONFIGs to remove.
613      options: option flags.
614    """
615    if not confirm(options, 'Clean up headers?'):
616        return
617
618    patterns = []
619    for config in configs:
620        patterns.append(re.compile(r'#\s*define\s+%s\W' % config))
621        patterns.append(re.compile(r'#\s*undef\s+%s\W' % config))
622
623    for dir in 'include', 'arch', 'board':
624        for (dirpath, dirnames, filenames) in os.walk(dir):
625            if dirpath == os.path.join('include', 'generated'):
626                continue
627            for filename in filenames:
628                if not fnmatch.fnmatch(filename, '*~'):
629                    cleanup_one_header(os.path.join(dirpath, filename),
630                                       patterns, options)
631
632def cleanup_one_extra_option(defconfig_path, configs, options):
633    """Delete config defines in CONFIG_SYS_EXTRA_OPTIONS in one defconfig file.
634
635    Arguments:
636      defconfig_path: path to the cleaned defconfig file.
637      configs: A list of CONFIGs to remove.
638      options: option flags.
639    """
640
641    start = 'CONFIG_SYS_EXTRA_OPTIONS="'
642    end = '"\n'
643
644    with open(defconfig_path) as f:
645        lines = f.readlines()
646
647    for i, line in enumerate(lines):
648        if line.startswith(start) and line.endswith(end):
649            break
650    else:
651        # CONFIG_SYS_EXTRA_OPTIONS was not found in this defconfig
652        return
653
654    old_tokens = line[len(start):-len(end)].split(',')
655    new_tokens = []
656
657    for token in old_tokens:
658        pos = token.find('=')
659        if not (token[:pos] if pos >= 0 else token) in configs:
660            new_tokens.append(token)
661
662    if new_tokens == old_tokens:
663        return
664
665    tolines = copy.copy(lines)
666
667    if new_tokens:
668        tolines[i] = start + ','.join(new_tokens) + end
669    else:
670        tolines.pop(i)
671
672    show_diff(lines, tolines, defconfig_path, options.color)
673
674    if options.dry_run:
675        return
676
677    with open(defconfig_path, 'w') as f:
678        for line in tolines:
679            f.write(line)
680
681def cleanup_extra_options(configs, options):
682    """Delete config defines in CONFIG_SYS_EXTRA_OPTIONS in defconfig files.
683
684    Arguments:
685      configs: A list of CONFIGs to remove.
686      options: option flags.
687    """
688    if not confirm(options, 'Clean up CONFIG_SYS_EXTRA_OPTIONS?'):
689        return
690
691    configs = [ config[len('CONFIG_'):] for config in configs ]
692
693    defconfigs = get_all_defconfigs()
694
695    for defconfig in defconfigs:
696        cleanup_one_extra_option(os.path.join('configs', defconfig), configs,
697                                 options)
698
699def cleanup_whitelist(configs, options):
700    """Delete config whitelist entries
701
702    Arguments:
703      configs: A list of CONFIGs to remove.
704      options: option flags.
705    """
706    if not confirm(options, 'Clean up whitelist entries?'):
707        return
708
709    with open(os.path.join('scripts', 'config_whitelist.txt')) as f:
710        lines = f.readlines()
711
712    lines = [x for x in lines if x.strip() not in configs]
713
714    with open(os.path.join('scripts', 'config_whitelist.txt'), 'w') as f:
715        f.write(''.join(lines))
716
717def find_matching(patterns, line):
718    for pat in patterns:
719        if pat.search(line):
720            return True
721    return False
722
723def cleanup_readme(configs, options):
724    """Delete config description in README
725
726    Arguments:
727      configs: A list of CONFIGs to remove.
728      options: option flags.
729    """
730    if not confirm(options, 'Clean up README?'):
731        return
732
733    patterns = []
734    for config in configs:
735        patterns.append(re.compile(r'^\s+%s' % config))
736
737    with open('README') as f:
738        lines = f.readlines()
739
740    found = False
741    newlines = []
742    for line in lines:
743        if not found:
744            found = find_matching(patterns, line)
745            if found:
746                continue
747
748        if found and re.search(r'^\s+CONFIG', line):
749            found = False
750
751        if not found:
752            newlines.append(line)
753
754    with open('README', 'w') as f:
755        f.write(''.join(newlines))
756
757
758### classes ###
759class Progress:
760
761    """Progress Indicator"""
762
763    def __init__(self, total):
764        """Create a new progress indicator.
765
766        Arguments:
767          total: A number of defconfig files to process.
768        """
769        self.current = 0
770        self.total = total
771
772    def inc(self):
773        """Increment the number of processed defconfig files."""
774
775        self.current += 1
776
777    def show(self):
778        """Display the progress."""
779        print ' %d defconfigs out of %d\r' % (self.current, self.total),
780        sys.stdout.flush()
781
782
783class KconfigScanner:
784    """Kconfig scanner."""
785
786    def __init__(self):
787        """Scan all the Kconfig files and create a Config object."""
788        # Define environment variables referenced from Kconfig
789        os.environ['srctree'] = os.getcwd()
790        os.environ['UBOOTVERSION'] = 'dummy'
791        os.environ['KCONFIG_OBJDIR'] = ''
792        self.conf = kconfiglib.Config()
793
794
795class KconfigParser:
796
797    """A parser of .config and include/autoconf.mk."""
798
799    re_arch = re.compile(r'CONFIG_SYS_ARCH="(.*)"')
800    re_cpu = re.compile(r'CONFIG_SYS_CPU="(.*)"')
801
802    def __init__(self, configs, options, build_dir):
803        """Create a new parser.
804
805        Arguments:
806          configs: A list of CONFIGs to move.
807          options: option flags.
808          build_dir: Build directory.
809        """
810        self.configs = configs
811        self.options = options
812        self.dotconfig = os.path.join(build_dir, '.config')
813        self.autoconf = os.path.join(build_dir, 'include', 'autoconf.mk')
814        self.spl_autoconf = os.path.join(build_dir, 'spl', 'include',
815                                         'autoconf.mk')
816        self.config_autoconf = os.path.join(build_dir, AUTO_CONF_PATH)
817        self.defconfig = os.path.join(build_dir, 'defconfig')
818
819    def get_arch(self):
820        """Parse .config file and return the architecture.
821
822        Returns:
823          Architecture name (e.g. 'arm').
824        """
825        arch = ''
826        cpu = ''
827        for line in open(self.dotconfig):
828            m = self.re_arch.match(line)
829            if m:
830                arch = m.group(1)
831                continue
832            m = self.re_cpu.match(line)
833            if m:
834                cpu = m.group(1)
835
836        if not arch:
837            return None
838
839        # fix-up for aarch64
840        if arch == 'arm' and cpu == 'armv8':
841            arch = 'aarch64'
842
843        return arch
844
845    def parse_one_config(self, config, dotconfig_lines, autoconf_lines):
846        """Parse .config, defconfig, include/autoconf.mk for one config.
847
848        This function looks for the config options in the lines from
849        defconfig, .config, and include/autoconf.mk in order to decide
850        which action should be taken for this defconfig.
851
852        Arguments:
853          config: CONFIG name to parse.
854          dotconfig_lines: lines from the .config file.
855          autoconf_lines: lines from the include/autoconf.mk file.
856
857        Returns:
858          A tupple of the action for this defconfig and the line
859          matched for the config.
860        """
861        not_set = '# %s is not set' % config
862
863        for line in autoconf_lines:
864            line = line.rstrip()
865            if line.startswith(config + '='):
866                new_val = line
867                break
868        else:
869            new_val = not_set
870
871        for line in dotconfig_lines:
872            line = line.rstrip()
873            if line.startswith(config + '=') or line == not_set:
874                old_val = line
875                break
876        else:
877            if new_val == not_set:
878                return (ACTION_NO_ENTRY, config)
879            else:
880                return (ACTION_NO_ENTRY_WARN, config)
881
882        # If this CONFIG is neither bool nor trisate
883        if old_val[-2:] != '=y' and old_val[-2:] != '=m' and old_val != not_set:
884            # tools/scripts/define2mk.sed changes '1' to 'y'.
885            # This is a problem if the CONFIG is int type.
886            # Check the type in Kconfig and handle it correctly.
887            if new_val[-2:] == '=y':
888                new_val = new_val[:-1] + '1'
889
890        return (ACTION_NO_CHANGE if old_val == new_val else ACTION_MOVE,
891                new_val)
892
893    def update_dotconfig(self):
894        """Parse files for the config options and update the .config.
895
896        This function parses the generated .config and include/autoconf.mk
897        searching the target options.
898        Move the config option(s) to the .config as needed.
899
900        Arguments:
901          defconfig: defconfig name.
902
903        Returns:
904          Return a tuple of (updated flag, log string).
905          The "updated flag" is True if the .config was updated, False
906          otherwise.  The "log string" shows what happend to the .config.
907        """
908
909        results = []
910        updated = False
911        suspicious = False
912        rm_files = [self.config_autoconf, self.autoconf]
913
914        if self.options.spl:
915            if os.path.exists(self.spl_autoconf):
916                autoconf_path = self.spl_autoconf
917                rm_files.append(self.spl_autoconf)
918            else:
919                for f in rm_files:
920                    os.remove(f)
921                return (updated, suspicious,
922                        color_text(self.options.color, COLOR_BROWN,
923                                   "SPL is not enabled.  Skipped.") + '\n')
924        else:
925            autoconf_path = self.autoconf
926
927        with open(self.dotconfig) as f:
928            dotconfig_lines = f.readlines()
929
930        with open(autoconf_path) as f:
931            autoconf_lines = f.readlines()
932
933        for config in self.configs:
934            result = self.parse_one_config(config, dotconfig_lines,
935                                           autoconf_lines)
936            results.append(result)
937
938        log = ''
939
940        for (action, value) in results:
941            if action == ACTION_MOVE:
942                actlog = "Move '%s'" % value
943                log_color = COLOR_LIGHT_GREEN
944            elif action == ACTION_NO_ENTRY:
945                actlog = "%s is not defined in Kconfig.  Do nothing." % value
946                log_color = COLOR_LIGHT_BLUE
947            elif action == ACTION_NO_ENTRY_WARN:
948                actlog = "%s is not defined in Kconfig (suspicious).  Do nothing." % value
949                log_color = COLOR_YELLOW
950                suspicious = True
951            elif action == ACTION_NO_CHANGE:
952                actlog = "'%s' is the same as the define in Kconfig.  Do nothing." \
953                         % value
954                log_color = COLOR_LIGHT_PURPLE
955            elif action == ACTION_SPL_NOT_EXIST:
956                actlog = "SPL is not enabled for this defconfig.  Skip."
957                log_color = COLOR_PURPLE
958            else:
959                sys.exit("Internal Error. This should not happen.")
960
961            log += color_text(self.options.color, log_color, actlog) + '\n'
962
963        with open(self.dotconfig, 'a') as f:
964            for (action, value) in results:
965                if action == ACTION_MOVE:
966                    f.write(value + '\n')
967                    updated = True
968
969        self.results = results
970        for f in rm_files:
971            os.remove(f)
972
973        return (updated, suspicious, log)
974
975    def check_defconfig(self):
976        """Check the defconfig after savedefconfig
977
978        Returns:
979          Return additional log if moved CONFIGs were removed again by
980          'make savedefconfig'.
981        """
982
983        log = ''
984
985        with open(self.defconfig) as f:
986            defconfig_lines = f.readlines()
987
988        for (action, value) in self.results:
989            if action != ACTION_MOVE:
990                continue
991            if not value + '\n' in defconfig_lines:
992                log += color_text(self.options.color, COLOR_YELLOW,
993                                  "'%s' was removed by savedefconfig.\n" %
994                                  value)
995
996        return log
997
998
999class DatabaseThread(threading.Thread):
1000    """This thread processes results from Slot threads.
1001
1002    It collects the data in the master config directary. There is only one
1003    result thread, and this helps to serialise the build output.
1004    """
1005    def __init__(self, config_db, db_queue):
1006        """Set up a new result thread
1007
1008        Args:
1009            builder: Builder which will be sent each result
1010        """
1011        threading.Thread.__init__(self)
1012        self.config_db = config_db
1013        self.db_queue= db_queue
1014
1015    def run(self):
1016        """Called to start up the result thread.
1017
1018        We collect the next result job and pass it on to the build.
1019        """
1020        while True:
1021            defconfig, configs = self.db_queue.get()
1022            self.config_db[defconfig] = configs
1023            self.db_queue.task_done()
1024
1025
1026class Slot:
1027
1028    """A slot to store a subprocess.
1029
1030    Each instance of this class handles one subprocess.
1031    This class is useful to control multiple threads
1032    for faster processing.
1033    """
1034
1035    def __init__(self, toolchains, configs, options, progress, devnull,
1036		 make_cmd, reference_src_dir, db_queue):
1037        """Create a new process slot.
1038
1039        Arguments:
1040          toolchains: Toolchains object containing toolchains.
1041          configs: A list of CONFIGs to move.
1042          options: option flags.
1043          progress: A progress indicator.
1044          devnull: A file object of '/dev/null'.
1045          make_cmd: command name of GNU Make.
1046          reference_src_dir: Determine the true starting config state from this
1047                             source tree.
1048          db_queue: output queue to write config info for the database
1049        """
1050        self.toolchains = toolchains
1051        self.options = options
1052        self.progress = progress
1053        self.build_dir = tempfile.mkdtemp()
1054        self.devnull = devnull
1055        self.make_cmd = (make_cmd, 'O=' + self.build_dir)
1056        self.reference_src_dir = reference_src_dir
1057        self.db_queue = db_queue
1058        self.parser = KconfigParser(configs, options, self.build_dir)
1059        self.state = STATE_IDLE
1060        self.failed_boards = set()
1061        self.suspicious_boards = set()
1062
1063    def __del__(self):
1064        """Delete the working directory
1065
1066        This function makes sure the temporary directory is cleaned away
1067        even if Python suddenly dies due to error.  It should be done in here
1068        because it is guaranteed the destructor is always invoked when the
1069        instance of the class gets unreferenced.
1070
1071        If the subprocess is still running, wait until it finishes.
1072        """
1073        if self.state != STATE_IDLE:
1074            while self.ps.poll() == None:
1075                pass
1076        shutil.rmtree(self.build_dir)
1077
1078    def add(self, defconfig):
1079        """Assign a new subprocess for defconfig and add it to the slot.
1080
1081        If the slot is vacant, create a new subprocess for processing the
1082        given defconfig and add it to the slot.  Just returns False if
1083        the slot is occupied (i.e. the current subprocess is still running).
1084
1085        Arguments:
1086          defconfig: defconfig name.
1087
1088        Returns:
1089          Return True on success or False on failure
1090        """
1091        if self.state != STATE_IDLE:
1092            return False
1093
1094        self.defconfig = defconfig
1095        self.log = ''
1096        self.current_src_dir = self.reference_src_dir
1097        self.do_defconfig()
1098        return True
1099
1100    def poll(self):
1101        """Check the status of the subprocess and handle it as needed.
1102
1103        Returns True if the slot is vacant (i.e. in idle state).
1104        If the configuration is successfully finished, assign a new
1105        subprocess to build include/autoconf.mk.
1106        If include/autoconf.mk is generated, invoke the parser to
1107        parse the .config and the include/autoconf.mk, moving
1108        config options to the .config as needed.
1109        If the .config was updated, run "make savedefconfig" to sync
1110        it, update the original defconfig, and then set the slot back
1111        to the idle state.
1112
1113        Returns:
1114          Return True if the subprocess is terminated, False otherwise
1115        """
1116        if self.state == STATE_IDLE:
1117            return True
1118
1119        if self.ps.poll() == None:
1120            return False
1121
1122        if self.ps.poll() != 0:
1123            self.handle_error()
1124        elif self.state == STATE_DEFCONFIG:
1125            if self.reference_src_dir and not self.current_src_dir:
1126                self.do_savedefconfig()
1127            else:
1128                self.do_autoconf()
1129        elif self.state == STATE_AUTOCONF:
1130            if self.current_src_dir:
1131                self.current_src_dir = None
1132                self.do_defconfig()
1133            elif self.options.build_db:
1134                self.do_build_db()
1135            else:
1136                self.do_savedefconfig()
1137        elif self.state == STATE_SAVEDEFCONFIG:
1138            self.update_defconfig()
1139        else:
1140            sys.exit("Internal Error. This should not happen.")
1141
1142        return True if self.state == STATE_IDLE else False
1143
1144    def handle_error(self):
1145        """Handle error cases."""
1146
1147        self.log += color_text(self.options.color, COLOR_LIGHT_RED,
1148                               "Failed to process.\n")
1149        if self.options.verbose:
1150            self.log += color_text(self.options.color, COLOR_LIGHT_CYAN,
1151                                   self.ps.stderr.read())
1152        self.finish(False)
1153
1154    def do_defconfig(self):
1155        """Run 'make <board>_defconfig' to create the .config file."""
1156
1157        cmd = list(self.make_cmd)
1158        cmd.append(self.defconfig)
1159        self.ps = subprocess.Popen(cmd, stdout=self.devnull,
1160                                   stderr=subprocess.PIPE,
1161                                   cwd=self.current_src_dir)
1162        self.state = STATE_DEFCONFIG
1163
1164    def do_autoconf(self):
1165        """Run 'make AUTO_CONF_PATH'."""
1166
1167        arch = self.parser.get_arch()
1168        try:
1169            toolchain = self.toolchains.Select(arch)
1170        except ValueError:
1171            self.log += color_text(self.options.color, COLOR_YELLOW,
1172                    "Tool chain for '%s' is missing.  Do nothing.\n" % arch)
1173            self.finish(False)
1174            return
1175	env = toolchain.MakeEnvironment(False)
1176
1177        cmd = list(self.make_cmd)
1178        cmd.append('KCONFIG_IGNORE_DUPLICATES=1')
1179        cmd.append(AUTO_CONF_PATH)
1180        self.ps = subprocess.Popen(cmd, stdout=self.devnull, env=env,
1181                                   stderr=subprocess.PIPE,
1182                                   cwd=self.current_src_dir)
1183        self.state = STATE_AUTOCONF
1184
1185    def do_build_db(self):
1186        """Add the board to the database"""
1187        configs = {}
1188        with open(os.path.join(self.build_dir, AUTO_CONF_PATH)) as fd:
1189            for line in fd.readlines():
1190                if line.startswith('CONFIG'):
1191                    config, value = line.split('=', 1)
1192                    configs[config] = value.rstrip()
1193        self.db_queue.put([self.defconfig, configs])
1194        self.finish(True)
1195
1196    def do_savedefconfig(self):
1197        """Update the .config and run 'make savedefconfig'."""
1198
1199        (updated, suspicious, log) = self.parser.update_dotconfig()
1200        if suspicious:
1201            self.suspicious_boards.add(self.defconfig)
1202        self.log += log
1203
1204        if not self.options.force_sync and not updated:
1205            self.finish(True)
1206            return
1207        if updated:
1208            self.log += color_text(self.options.color, COLOR_LIGHT_GREEN,
1209                                   "Syncing by savedefconfig...\n")
1210        else:
1211            self.log += "Syncing by savedefconfig (forced by option)...\n"
1212
1213        cmd = list(self.make_cmd)
1214        cmd.append('savedefconfig')
1215        self.ps = subprocess.Popen(cmd, stdout=self.devnull,
1216                                   stderr=subprocess.PIPE)
1217        self.state = STATE_SAVEDEFCONFIG
1218
1219    def update_defconfig(self):
1220        """Update the input defconfig and go back to the idle state."""
1221
1222        log = self.parser.check_defconfig()
1223        if log:
1224            self.suspicious_boards.add(self.defconfig)
1225            self.log += log
1226        orig_defconfig = os.path.join('configs', self.defconfig)
1227        new_defconfig = os.path.join(self.build_dir, 'defconfig')
1228        updated = not filecmp.cmp(orig_defconfig, new_defconfig)
1229
1230        if updated:
1231            self.log += color_text(self.options.color, COLOR_LIGHT_BLUE,
1232                                   "defconfig was updated.\n")
1233
1234        if not self.options.dry_run and updated:
1235            shutil.move(new_defconfig, orig_defconfig)
1236        self.finish(True)
1237
1238    def finish(self, success):
1239        """Display log along with progress and go to the idle state.
1240
1241        Arguments:
1242          success: Should be True when the defconfig was processed
1243                   successfully, or False when it fails.
1244        """
1245        # output at least 30 characters to hide the "* defconfigs out of *".
1246        log = self.defconfig.ljust(30) + '\n'
1247
1248        log += '\n'.join([ '    ' + s for s in self.log.split('\n') ])
1249        # Some threads are running in parallel.
1250        # Print log atomically to not mix up logs from different threads.
1251        print >> (sys.stdout if success else sys.stderr), log
1252
1253        if not success:
1254            if self.options.exit_on_error:
1255                sys.exit("Exit on error.")
1256            # If --exit-on-error flag is not set, skip this board and continue.
1257            # Record the failed board.
1258            self.failed_boards.add(self.defconfig)
1259
1260        self.progress.inc()
1261        self.progress.show()
1262        self.state = STATE_IDLE
1263
1264    def get_failed_boards(self):
1265        """Returns a set of failed boards (defconfigs) in this slot.
1266        """
1267        return self.failed_boards
1268
1269    def get_suspicious_boards(self):
1270        """Returns a set of boards (defconfigs) with possible misconversion.
1271        """
1272        return self.suspicious_boards - self.failed_boards
1273
1274class Slots:
1275
1276    """Controller of the array of subprocess slots."""
1277
1278    def __init__(self, toolchains, configs, options, progress,
1279		 reference_src_dir, db_queue):
1280        """Create a new slots controller.
1281
1282        Arguments:
1283          toolchains: Toolchains object containing toolchains.
1284          configs: A list of CONFIGs to move.
1285          options: option flags.
1286          progress: A progress indicator.
1287          reference_src_dir: Determine the true starting config state from this
1288                             source tree.
1289          db_queue: output queue to write config info for the database
1290        """
1291        self.options = options
1292        self.slots = []
1293        devnull = get_devnull()
1294        make_cmd = get_make_cmd()
1295        for i in range(options.jobs):
1296            self.slots.append(Slot(toolchains, configs, options, progress,
1297				   devnull, make_cmd, reference_src_dir,
1298				   db_queue))
1299
1300    def add(self, defconfig):
1301        """Add a new subprocess if a vacant slot is found.
1302
1303        Arguments:
1304          defconfig: defconfig name to be put into.
1305
1306        Returns:
1307          Return True on success or False on failure
1308        """
1309        for slot in self.slots:
1310            if slot.add(defconfig):
1311                return True
1312        return False
1313
1314    def available(self):
1315        """Check if there is a vacant slot.
1316
1317        Returns:
1318          Return True if at lease one vacant slot is found, False otherwise.
1319        """
1320        for slot in self.slots:
1321            if slot.poll():
1322                return True
1323        return False
1324
1325    def empty(self):
1326        """Check if all slots are vacant.
1327
1328        Returns:
1329          Return True if all the slots are vacant, False otherwise.
1330        """
1331        ret = True
1332        for slot in self.slots:
1333            if not slot.poll():
1334                ret = False
1335        return ret
1336
1337    def show_failed_boards(self):
1338        """Display all of the failed boards (defconfigs)."""
1339        boards = set()
1340        output_file = 'moveconfig.failed'
1341
1342        for slot in self.slots:
1343            boards |= slot.get_failed_boards()
1344
1345        if boards:
1346            boards = '\n'.join(boards) + '\n'
1347            msg = "The following boards were not processed due to error:\n"
1348            msg += boards
1349            msg += "(the list has been saved in %s)\n" % output_file
1350            print >> sys.stderr, color_text(self.options.color, COLOR_LIGHT_RED,
1351                                            msg)
1352
1353            with open(output_file, 'w') as f:
1354                f.write(boards)
1355
1356    def show_suspicious_boards(self):
1357        """Display all boards (defconfigs) with possible misconversion."""
1358        boards = set()
1359        output_file = 'moveconfig.suspicious'
1360
1361        for slot in self.slots:
1362            boards |= slot.get_suspicious_boards()
1363
1364        if boards:
1365            boards = '\n'.join(boards) + '\n'
1366            msg = "The following boards might have been converted incorrectly.\n"
1367            msg += "It is highly recommended to check them manually:\n"
1368            msg += boards
1369            msg += "(the list has been saved in %s)\n" % output_file
1370            print >> sys.stderr, color_text(self.options.color, COLOR_YELLOW,
1371                                            msg)
1372
1373            with open(output_file, 'w') as f:
1374                f.write(boards)
1375
1376class ReferenceSource:
1377
1378    """Reference source against which original configs should be parsed."""
1379
1380    def __init__(self, commit):
1381        """Create a reference source directory based on a specified commit.
1382
1383        Arguments:
1384          commit: commit to git-clone
1385        """
1386        self.src_dir = tempfile.mkdtemp()
1387        print "Cloning git repo to a separate work directory..."
1388        subprocess.check_output(['git', 'clone', os.getcwd(), '.'],
1389                                cwd=self.src_dir)
1390        print "Checkout '%s' to build the original autoconf.mk." % \
1391            subprocess.check_output(['git', 'rev-parse', '--short', commit]).strip()
1392        subprocess.check_output(['git', 'checkout', commit],
1393                                stderr=subprocess.STDOUT, cwd=self.src_dir)
1394
1395    def __del__(self):
1396        """Delete the reference source directory
1397
1398        This function makes sure the temporary directory is cleaned away
1399        even if Python suddenly dies due to error.  It should be done in here
1400        because it is guaranteed the destructor is always invoked when the
1401        instance of the class gets unreferenced.
1402        """
1403        shutil.rmtree(self.src_dir)
1404
1405    def get_dir(self):
1406        """Return the absolute path to the reference source directory."""
1407
1408        return self.src_dir
1409
1410def move_config(toolchains, configs, options, db_queue):
1411    """Move config options to defconfig files.
1412
1413    Arguments:
1414      configs: A list of CONFIGs to move.
1415      options: option flags
1416    """
1417    if len(configs) == 0:
1418        if options.force_sync:
1419            print 'No CONFIG is specified. You are probably syncing defconfigs.',
1420        elif options.build_db:
1421            print 'Building %s database' % CONFIG_DATABASE
1422        else:
1423            print 'Neither CONFIG nor --force-sync is specified. Nothing will happen.',
1424    else:
1425        print 'Move ' + ', '.join(configs),
1426    print '(jobs: %d)\n' % options.jobs
1427
1428    if options.git_ref:
1429        reference_src = ReferenceSource(options.git_ref)
1430        reference_src_dir = reference_src.get_dir()
1431    else:
1432        reference_src_dir = None
1433
1434    if options.defconfigs:
1435        defconfigs = get_matched_defconfigs(options.defconfigs)
1436    else:
1437        defconfigs = get_all_defconfigs()
1438
1439    progress = Progress(len(defconfigs))
1440    slots = Slots(toolchains, configs, options, progress, reference_src_dir,
1441		  db_queue)
1442
1443    # Main loop to process defconfig files:
1444    #  Add a new subprocess into a vacant slot.
1445    #  Sleep if there is no available slot.
1446    for defconfig in defconfigs:
1447        while not slots.add(defconfig):
1448            while not slots.available():
1449                # No available slot: sleep for a while
1450                time.sleep(SLEEP_TIME)
1451
1452    # wait until all the subprocesses finish
1453    while not slots.empty():
1454        time.sleep(SLEEP_TIME)
1455
1456    print ''
1457    slots.show_failed_boards()
1458    slots.show_suspicious_boards()
1459
1460def find_kconfig_rules(kconf, config, imply_config):
1461    """Check whether a config has a 'select' or 'imply' keyword
1462
1463    Args:
1464        kconf: Kconfig.Config object
1465        config: Name of config to check (without CONFIG_ prefix)
1466        imply_config: Implying config (without CONFIG_ prefix) which may or
1467            may not have an 'imply' for 'config')
1468
1469    Returns:
1470        Symbol object for 'config' if found, else None
1471    """
1472    sym = kconf.get_symbol(imply_config)
1473    if sym:
1474        for sel in sym.get_selected_symbols() | sym.get_implied_symbols():
1475            if sel.get_name() == config:
1476                return sym
1477    return None
1478
1479def check_imply_rule(kconf, config, imply_config):
1480    """Check if we can add an 'imply' option
1481
1482    This finds imply_config in the Kconfig and looks to see if it is possible
1483    to add an 'imply' for 'config' to that part of the Kconfig.
1484
1485    Args:
1486        kconf: Kconfig.Config object
1487        config: Name of config to check (without CONFIG_ prefix)
1488        imply_config: Implying config (without CONFIG_ prefix) which may or
1489            may not have an 'imply' for 'config')
1490
1491    Returns:
1492        tuple:
1493            filename of Kconfig file containing imply_config, or None if none
1494            line number within the Kconfig file, or 0 if none
1495            message indicating the result
1496    """
1497    sym = kconf.get_symbol(imply_config)
1498    if not sym:
1499        return 'cannot find sym'
1500    locs = sym.get_def_locations()
1501    if len(locs) != 1:
1502        return '%d locations' % len(locs)
1503    fname, linenum = locs[0]
1504    cwd = os.getcwd()
1505    if cwd and fname.startswith(cwd):
1506        fname = fname[len(cwd) + 1:]
1507    file_line = ' at %s:%d' % (fname, linenum)
1508    with open(fname) as fd:
1509        data = fd.read().splitlines()
1510    if data[linenum - 1] != 'config %s' % imply_config:
1511        return None, 0, 'bad sym format %s%s' % (data[linenum], file_line)
1512    return fname, linenum, 'adding%s' % file_line
1513
1514def add_imply_rule(config, fname, linenum):
1515    """Add a new 'imply' option to a Kconfig
1516
1517    Args:
1518        config: config option to add an imply for (without CONFIG_ prefix)
1519        fname: Kconfig filename to update
1520        linenum: Line number to place the 'imply' before
1521
1522    Returns:
1523        Message indicating the result
1524    """
1525    file_line = ' at %s:%d' % (fname, linenum)
1526    data = open(fname).read().splitlines()
1527    linenum -= 1
1528
1529    for offset, line in enumerate(data[linenum:]):
1530        if line.strip().startswith('help') or not line:
1531            data.insert(linenum + offset, '\timply %s' % config)
1532            with open(fname, 'w') as fd:
1533                fd.write('\n'.join(data) + '\n')
1534            return 'added%s' % file_line
1535
1536    return 'could not insert%s'
1537
1538(IMPLY_MIN_2, IMPLY_TARGET, IMPLY_CMD, IMPLY_NON_ARCH_BOARD) = (
1539    1, 2, 4, 8)
1540
1541IMPLY_FLAGS = {
1542    'min2': [IMPLY_MIN_2, 'Show options which imply >2 boards (normally >5)'],
1543    'target': [IMPLY_TARGET, 'Allow CONFIG_TARGET_... options to imply'],
1544    'cmd': [IMPLY_CMD, 'Allow CONFIG_CMD_... to imply'],
1545    'non-arch-board': [
1546        IMPLY_NON_ARCH_BOARD,
1547        'Allow Kconfig options outside arch/ and /board/ to imply'],
1548};
1549
1550def do_imply_config(config_list, add_imply, imply_flags, skip_added,
1551                    check_kconfig=True, find_superset=False):
1552    """Find CONFIG options which imply those in the list
1553
1554    Some CONFIG options can be implied by others and this can help to reduce
1555    the size of the defconfig files. For example, CONFIG_X86 implies
1556    CONFIG_CMD_IRQ, so we can put 'imply CMD_IRQ' under 'config X86' and
1557    all x86 boards will have that option, avoiding adding CONFIG_CMD_IRQ to
1558    each of the x86 defconfig files.
1559
1560    This function uses the moveconfig database to find such options. It
1561    displays a list of things that could possibly imply those in the list.
1562    The algorithm ignores any that start with CONFIG_TARGET since these
1563    typically refer to only a few defconfigs (often one). It also does not
1564    display a config with less than 5 defconfigs.
1565
1566    The algorithm works using sets. For each target config in config_list:
1567        - Get the set 'defconfigs' which use that target config
1568        - For each config (from a list of all configs):
1569            - Get the set 'imply_defconfig' of defconfigs which use that config
1570            -
1571            - If imply_defconfigs contains anything not in defconfigs then
1572              this config does not imply the target config
1573
1574    Params:
1575        config_list: List of CONFIG options to check (each a string)
1576        add_imply: Automatically add an 'imply' for each config.
1577        imply_flags: Flags which control which implying configs are allowed
1578           (IMPLY_...)
1579        skip_added: Don't show options which already have an imply added.
1580        check_kconfig: Check if implied symbols already have an 'imply' or
1581            'select' for the target config, and show this information if so.
1582        find_superset: True to look for configs which are a superset of those
1583            already found. So for example if CONFIG_EXYNOS5 implies an option,
1584            but CONFIG_EXYNOS covers a larger set of defconfigs and also
1585            implies that option, this will drop the former in favour of the
1586            latter. In practice this option has not proved very used.
1587
1588    Note the terminoloy:
1589        config - a CONFIG_XXX options (a string, e.g. 'CONFIG_CMD_EEPROM')
1590        defconfig - a defconfig file (a string, e.g. 'configs/snow_defconfig')
1591    """
1592    kconf = KconfigScanner().conf if check_kconfig else None
1593    if add_imply and add_imply != 'all':
1594        add_imply = add_imply.split()
1595
1596    # key is defconfig name, value is dict of (CONFIG_xxx, value)
1597    config_db = {}
1598
1599    # Holds a dict containing the set of defconfigs that contain each config
1600    # key is config, value is set of defconfigs using that config
1601    defconfig_db = collections.defaultdict(set)
1602
1603    # Set of all config options we have seen
1604    all_configs = set()
1605
1606    # Set of all defconfigs we have seen
1607    all_defconfigs = set()
1608
1609    # Read in the database
1610    configs = {}
1611    with open(CONFIG_DATABASE) as fd:
1612        for line in fd.readlines():
1613            line = line.rstrip()
1614            if not line:  # Separator between defconfigs
1615                config_db[defconfig] = configs
1616                all_defconfigs.add(defconfig)
1617                configs = {}
1618            elif line[0] == ' ':  # CONFIG line
1619                config, value = line.strip().split('=', 1)
1620                configs[config] = value
1621                defconfig_db[config].add(defconfig)
1622                all_configs.add(config)
1623            else:  # New defconfig
1624                defconfig = line
1625
1626    # Work through each target config option in tern, independently
1627    for config in config_list:
1628        defconfigs = defconfig_db.get(config)
1629        if not defconfigs:
1630            print '%s not found in any defconfig' % config
1631            continue
1632
1633        # Get the set of defconfigs without this one (since a config cannot
1634        # imply itself)
1635        non_defconfigs = all_defconfigs - defconfigs
1636        num_defconfigs = len(defconfigs)
1637        print '%s found in %d/%d defconfigs' % (config, num_defconfigs,
1638                                                len(all_configs))
1639
1640        # This will hold the results: key=config, value=defconfigs containing it
1641        imply_configs = {}
1642        rest_configs = all_configs - set([config])
1643
1644        # Look at every possible config, except the target one
1645        for imply_config in rest_configs:
1646            if 'ERRATUM' in imply_config:
1647                continue
1648            if not (imply_flags & IMPLY_CMD):
1649                if 'CONFIG_CMD' in imply_config:
1650                    continue
1651            if not (imply_flags & IMPLY_TARGET):
1652                if 'CONFIG_TARGET' in imply_config:
1653                    continue
1654
1655            # Find set of defconfigs that have this config
1656            imply_defconfig = defconfig_db[imply_config]
1657
1658            # Get the intersection of this with defconfigs containing the
1659            # target config
1660            common_defconfigs = imply_defconfig & defconfigs
1661
1662            # Get the set of defconfigs containing this config which DO NOT
1663            # also contain the taret config. If this set is non-empty it means
1664            # that this config affects other defconfigs as well as (possibly)
1665            # the ones affected by the target config. This means it implies
1666            # things we don't want to imply.
1667            not_common_defconfigs = imply_defconfig & non_defconfigs
1668            if not_common_defconfigs:
1669                continue
1670
1671            # If there are common defconfigs, imply_config may be useful
1672            if common_defconfigs:
1673                skip = False
1674                if find_superset:
1675                    for prev in imply_configs.keys():
1676                        prev_count = len(imply_configs[prev])
1677                        count = len(common_defconfigs)
1678                        if (prev_count > count and
1679                            (imply_configs[prev] & common_defconfigs ==
1680                            common_defconfigs)):
1681                            # skip imply_config because prev is a superset
1682                            skip = True
1683                            break
1684                        elif count > prev_count:
1685                            # delete prev because imply_config is a superset
1686                            del imply_configs[prev]
1687                if not skip:
1688                    imply_configs[imply_config] = common_defconfigs
1689
1690        # Now we have a dict imply_configs of configs which imply each config
1691        # The value of each dict item is the set of defconfigs containing that
1692        # config. Rank them so that we print the configs that imply the largest
1693        # number of defconfigs first.
1694        ranked_iconfigs = sorted(imply_configs,
1695                            key=lambda k: len(imply_configs[k]), reverse=True)
1696        kconfig_info = ''
1697        cwd = os.getcwd()
1698        add_list = collections.defaultdict(list)
1699        for iconfig in ranked_iconfigs:
1700            num_common = len(imply_configs[iconfig])
1701
1702            # Don't bother if there are less than 5 defconfigs affected.
1703            if num_common < (2 if imply_flags & IMPLY_MIN_2 else 5):
1704                continue
1705            missing = defconfigs - imply_configs[iconfig]
1706            missing_str = ', '.join(missing) if missing else 'all'
1707            missing_str = ''
1708            show = True
1709            if kconf:
1710                sym = find_kconfig_rules(kconf, config[CONFIG_LEN:],
1711                                         iconfig[CONFIG_LEN:])
1712                kconfig_info = ''
1713                if sym:
1714                    locs = sym.get_def_locations()
1715                    if len(locs) == 1:
1716                        fname, linenum = locs[0]
1717                        if cwd and fname.startswith(cwd):
1718                            fname = fname[len(cwd) + 1:]
1719                        kconfig_info = '%s:%d' % (fname, linenum)
1720                        if skip_added:
1721                            show = False
1722                else:
1723                    sym = kconf.get_symbol(iconfig[CONFIG_LEN:])
1724                    fname = ''
1725                    if sym:
1726                        locs = sym.get_def_locations()
1727                        if len(locs) == 1:
1728                            fname, linenum = locs[0]
1729                            if cwd and fname.startswith(cwd):
1730                                fname = fname[len(cwd) + 1:]
1731                    in_arch_board = not sym or (fname.startswith('arch') or
1732                                                fname.startswith('board'))
1733                    if (not in_arch_board and
1734                        not (imply_flags & IMPLY_NON_ARCH_BOARD)):
1735                        continue
1736
1737                    if add_imply and (add_imply == 'all' or
1738                                      iconfig in add_imply):
1739                        fname, linenum, kconfig_info = (check_imply_rule(kconf,
1740                                config[CONFIG_LEN:], iconfig[CONFIG_LEN:]))
1741                        if fname:
1742                            add_list[fname].append(linenum)
1743
1744            if show and kconfig_info != 'skip':
1745                print '%5d : %-30s%-25s %s' % (num_common, iconfig.ljust(30),
1746                                              kconfig_info, missing_str)
1747
1748        # Having collected a list of things to add, now we add them. We process
1749        # each file from the largest line number to the smallest so that
1750        # earlier additions do not affect our line numbers. E.g. if we added an
1751        # imply at line 20 it would change the position of each line after
1752        # that.
1753        for fname, linenums in add_list.iteritems():
1754            for linenum in sorted(linenums, reverse=True):
1755                add_imply_rule(config[CONFIG_LEN:], fname, linenum)
1756
1757
1758def main():
1759    try:
1760        cpu_count = multiprocessing.cpu_count()
1761    except NotImplementedError:
1762        cpu_count = 1
1763
1764    parser = optparse.OptionParser()
1765    # Add options here
1766    parser.add_option('-a', '--add-imply', type='string', default='',
1767                      help='comma-separated list of CONFIG options to add '
1768                      "an 'imply' statement to for the CONFIG in -i")
1769    parser.add_option('-A', '--skip-added', action='store_true', default=False,
1770                      help="don't show options which are already marked as "
1771                      'implying others')
1772    parser.add_option('-b', '--build-db', action='store_true', default=False,
1773                      help='build a CONFIG database')
1774    parser.add_option('-c', '--color', action='store_true', default=False,
1775                      help='display the log in color')
1776    parser.add_option('-C', '--commit', action='store_true', default=False,
1777                      help='Create a git commit for the operation')
1778    parser.add_option('-d', '--defconfigs', type='string',
1779                      help='a file containing a list of defconfigs to move, '
1780                      "one per line (for example 'snow_defconfig') "
1781                      "or '-' to read from stdin")
1782    parser.add_option('-i', '--imply', action='store_true', default=False,
1783                      help='find options which imply others')
1784    parser.add_option('-I', '--imply-flags', type='string', default='',
1785                      help="control the -i option ('help' for help")
1786    parser.add_option('-n', '--dry-run', action='store_true', default=False,
1787                      help='perform a trial run (show log with no changes)')
1788    parser.add_option('-e', '--exit-on-error', action='store_true',
1789                      default=False,
1790                      help='exit immediately on any error')
1791    parser.add_option('-s', '--force-sync', action='store_true', default=False,
1792                      help='force sync by savedefconfig')
1793    parser.add_option('-S', '--spl', action='store_true', default=False,
1794                      help='parse config options defined for SPL build')
1795    parser.add_option('-H', '--headers-only', dest='cleanup_headers_only',
1796                      action='store_true', default=False,
1797                      help='only cleanup the headers')
1798    parser.add_option('-j', '--jobs', type='int', default=cpu_count,
1799                      help='the number of jobs to run simultaneously')
1800    parser.add_option('-r', '--git-ref', type='string',
1801                      help='the git ref to clone for building the autoconf.mk')
1802    parser.add_option('-y', '--yes', action='store_true', default=False,
1803                      help="respond 'yes' to any prompts")
1804    parser.add_option('-v', '--verbose', action='store_true', default=False,
1805                      help='show any build errors as boards are built')
1806    parser.usage += ' CONFIG ...'
1807
1808    (options, configs) = parser.parse_args()
1809
1810    if len(configs) == 0 and not any((options.force_sync, options.build_db,
1811                                      options.imply)):
1812        parser.print_usage()
1813        sys.exit(1)
1814
1815    # prefix the option name with CONFIG_ if missing
1816    configs = [ config if config.startswith('CONFIG_') else 'CONFIG_' + config
1817                for config in configs ]
1818
1819    check_top_directory()
1820
1821    if options.imply:
1822        imply_flags = 0
1823        if options.imply_flags == 'all':
1824            imply_flags = -1
1825
1826        elif options.imply_flags:
1827            for flag in options.imply_flags.split(','):
1828                bad = flag not in IMPLY_FLAGS
1829                if bad:
1830                    print "Invalid flag '%s'" % flag
1831                if flag == 'help' or bad:
1832                    print "Imply flags: (separate with ',')"
1833                    for name, info in IMPLY_FLAGS.iteritems():
1834                        print ' %-15s: %s' % (name, info[1])
1835                    parser.print_usage()
1836                    sys.exit(1)
1837                imply_flags |= IMPLY_FLAGS[flag][0]
1838
1839        do_imply_config(configs, options.add_imply, imply_flags,
1840                        options.skip_added)
1841        return
1842
1843    config_db = {}
1844    db_queue = Queue.Queue()
1845    t = DatabaseThread(config_db, db_queue)
1846    t.setDaemon(True)
1847    t.start()
1848
1849    if not options.cleanup_headers_only:
1850        check_clean_directory()
1851	bsettings.Setup('')
1852        toolchains = toolchain.Toolchains()
1853        toolchains.GetSettings()
1854        toolchains.Scan(verbose=False)
1855        move_config(toolchains, configs, options, db_queue)
1856        db_queue.join()
1857
1858    if configs:
1859        cleanup_headers(configs, options)
1860        cleanup_extra_options(configs, options)
1861        cleanup_whitelist(configs, options)
1862        cleanup_readme(configs, options)
1863
1864    if options.commit:
1865        subprocess.call(['git', 'add', '-u'])
1866        if configs:
1867            msg = 'Convert %s %sto Kconfig' % (configs[0],
1868                    'et al ' if len(configs) > 1 else '')
1869            msg += ('\n\nThis converts the following to Kconfig:\n   %s\n' %
1870                    '\n   '.join(configs))
1871        else:
1872            msg = 'configs: Resync with savedefconfig'
1873            msg += '\n\nRsync all defconfig files using moveconfig.py'
1874        subprocess.call(['git', 'commit', '-s', '-m', msg])
1875
1876    if options.build_db:
1877        with open(CONFIG_DATABASE, 'w') as fd:
1878            for defconfig, configs in config_db.iteritems():
1879                fd.write('%s\n' % defconfig)
1880                for config in sorted(configs.keys()):
1881                    fd.write('   %s=%s\n' % (config, configs[config]))
1882                fd.write('\n')
1883
1884if __name__ == '__main__':
1885    main()
1886