[Buildroot] [autobuild 3/4] autobuild-run: sanitize make options

[Thomas Petazzoni <thomas.petazzoni@free-electrons.com>]

Dear Samuel Martin,

On Sun, 12 Apr 2015 16:34:44 +0200, Samuel Martin wrote:
> So far, --make-opts allows the user to override any make option or
> variable, especially '-C' and 'O=' which should not in the autobuild
> context.
> 
> So, this change drop '-C' option and 'O=' and 'BR2_JLEVEL=' variables
> from the --make-opts arguments.
> 
> Signed-off-by: Samuel Martin <s.martin49@gmail.com>
> ---
>  scripts/autobuild-run | 37 ++++++++++++++++++++++++++++++++++++-
>  1 file changed, 36 insertions(+), 1 deletion(-)
> 
> diff --git a/scripts/autobuild-run b/scripts/autobuild-run
> index a7cdc12..dbfc33e 100755
> --- a/scripts/autobuild-run
> +++ b/scripts/autobuild-run
> @@ -773,6 +773,40 @@ def merge(dict_1, dict_2):
>      return dict((str(key), dict_1.get(key) or dict_2.get(key))
>                  for key in set(dict_2) | set(dict_1))
>  
> +def sanitize_make_opts(make_opts):
> +    """ sanitize make options
> +
> +    - do not allow to override '-C' option
> +    - do not allow to user deifined 'O=' and 'BR2_JLEVEL='
> +    - print log when overloading 'BR2_DL_DIR='
> +
> +    Return the sanitized make options string.
> +    """
> +    make_opts = make_opts.split(" ")
> +    for i, arg in enumerate(make_opts):
> +        if arg.startswith("-C"):
> +            # remove both '-C<path>' and '-C' arguments
> +            warn = "WARN: sanitizing make-opts (removing arguments '%s" % arg
> +            make_opts.remove(arg)
> +            if arg == '-C':
> +                # remove '<path>' in case of '-C <path>'
> +                # (no need for incrementing i since make_opts[i] already points
> +                # to '<path>' after arg (i.e. '-C') has been removed
> +                warn += " %s" % make_opts[i]
> +                make_opts.remove(make_opts[i])
> +            warn += "')"
> +            print(warn)
> +        elif "=" in arg:
> +            var = arg.split("=", 1)[0]
> +            if var in ("BR2_DL_DIR",):
> +                print("INFO: using user defined '%s' (%s)" % (var, arg))
> +            elif var in ("BR2_JLEVEL", "O",):
> +                warn = "WARN: sanitizing make variable (removing arguments '%s')" % arg
> +                make_opts.remove(arg)
> +                print(warn)
> +    return " ".join(make_opts)

To be honest, this seems a bit overkill to me. From my point of view
--make-opts is an advanced option, so users are supposed to understand
what they are doing. So I'm not very fond of adding a lot of fairly
complex code just to check for the validity of the values passed to
this option.

Best regards,

Thomas
-- 
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com