[U-Boot] [PATCH 6/7] tools/genboardscfg.py: check if the boards.cfg is up to date

[Simon Glass]

On 20 August 2014 05:47, Masahiro Yamada <yamada.m at jp.panasonic.com> wrote:
> It looks silly to regenerate the boards.cfg even when it is
> already up to date.
>
> The tool should exit with doing nothing if the boards.cfg is newer
> than any of defconfig, Kconfig and MAINTAINERS files.
>
> Specify -f (--force) option to get the boards.cfg regenerated
> regardless its time stamp.
>
> Signed-off-by: Masahiro Yamada <yamada.m at jp.panasonic.com>

Acked-by: Simon Glass <sjg at chromium.org>

Great idea.

> ---
>
>  tools/genboardscfg.py | 57 +++++++++++++++++++++++++++++++++++++++++++++++++--
>  1 file changed, 55 insertions(+), 2 deletions(-)
>
> diff --git a/tools/genboardscfg.py b/tools/genboardscfg.py
> index 13bb424..899db69 100755
> --- a/tools/genboardscfg.py
> +++ b/tools/genboardscfg.py
> @@ -87,6 +87,51 @@ def get_make_cmd():
>          sys.exit('GNU Make not found')
>      return ret[0].rstrip()
>
> +def output_is_new():
> +    """Check if the boards.cfg file is up to date.
> +
> +    Returns:
> +      True if the boards.cfg file exists and is newer than any of
> +      *_defconfig, MAINTAINERS and Kconfig*.  False otherwise.
> +    """
> +    try:
> +        ctime = os.path.getctime(BOARD_FILE)
> +    except OSError, exception:
> +        if exception.errno == errno.ENOENT:
> +            # return False on 'No such file or directory' error
> +            return False
> +        else:
> +            raise

if not os.path.exists(BOARD_FILE)
   return False

would probably be enough.

> +
> +    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 boards.cfg
> +    # was generated
> +    for line in open(BOARD_FILE):
> +        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 MaintainersDatabase:
>
> @@ -507,7 +552,7 @@ class BoardsFileGenerator:
>
>          self.in_progress = False
>
> -def gen_boards_cfg(jobs):
> +def gen_boards_cfg(jobs=1, force=False):
>      """Generate boards.cfg file.
>
>      The incomplete boards.cfg is deleted if an error (including
> @@ -517,6 +562,10 @@ def gen_boards_cfg(jobs):
>        jobs: The number of jobs to run simultaneously
>      """
>      check_top_directory()
> +    if not force and output_is_new():
> +        print "%s is up to date. Nothing to do." % BOARD_FILE
> +        sys.exit(0)
> +
>      generator = BoardsFileGenerator()
>      generator.generate(jobs)
>
> @@ -525,7 +574,10 @@ def main():
>      # Add options here
>      parser.add_option('-j', '--jobs',
>                        help='the number of jobs to run simultaneously')
> +    parser.add_option('-f', '--force', action="store_true", default=False,
> +                      help='regenerate the output even if it is new')
>      (options, args) = parser.parse_args()
> +
>      if options.jobs:
>          try:
>              jobs = int(options.jobs)
> @@ -538,7 +590,8 @@ def main():
>          except (OSError, ValueError):
>              print 'info: failed to get the number of CPUs. Set jobs to 1'
>              jobs = 1
> -    gen_boards_cfg(jobs)
> +
> +    gen_boards_cfg(jobs, force=options.force)
>
>  if __name__ == '__main__':
>      main()
> --
> 1.9.1
>

Regards,
Simon