[OE-core] [PATCH 2/2] cml1.bbclass: Add fragmentconfig task to cml1

[Richard Purdie]

On Wed, 2014-02-12 at 22:20 -0200, João Henrique Ferreira de Freitas
wrote:
> fragmentconfig() is a new task that makes a diff between the
> old and new config files and writes to the fragment.cfg result file.
> menuconfig() always copy the original config file, so the user
> doesn't need to copy it.
> 
> Signed-off-by: João Henrique Ferreira de Freitas <joaohf at gmail.com>
> ---
>  meta/classes/cml1.bbclass | 35 +++++++++++++++++++++++++++++++++++
>  1 file changed, 35 insertions(+)
> 
> diff --git a/meta/classes/cml1.bbclass b/meta/classes/cml1.bbclass
> index e292ecb..2053361 100644
> --- a/meta/classes/cml1.bbclass
> +++ b/meta/classes/cml1.bbclass
> @@ -16,8 +16,12 @@ HOST_LOADLIBES = "-lncurses"
>  TERMINFO = "${STAGING_DATADIR_NATIVE}/terminfo"
>  
>  python do_menuconfig() {
> +    import os

Don't import os please, this is always present so we don't need to.

> +    import shutil
> +
>      try:
>          mtime = os.path.getmtime(".config")
> +        shutil.copy(".config", ".config.orig")
>      except OSError:
>          mtime = 0
>  
> @@ -38,3 +42,34 @@ do_menuconfig[depends] += "ncurses-native:do_populate_sysroot"
>  do_menuconfig[nostamp] = "1"
>  addtask menuconfig after do_configure
>  
> +python do_fragmentconfig() {
> +    import shutil
> +    import subprocess
> +
> +    workdir = d.getVar('WORKDIR', True)
> +    fragment = workdir + '/fragment.cfg'
> +    configorig = '.config.orig'
> +    config = '.config'
> +
> +    try:
> +        md5newconfig = bb.utils.md5_file(configorig)
> +        md5config = bb.utils.md5_file(config)
> +        isdiff = md5newconfig != md5config
> +    except OSError:
> +        isdiff = 0
> +
> +    if isdiff:
> +        bb.note("Dumping config fragment into: '%s'." % fragment)
> +        bb.note("new '%s' old '%s'" % (md5newconfig,md5config))
> +
> +        statement = 'diff -Nurp ' + configorig + ' ' + config + '| sed -n "s/^\+//p" >' + fragment
> +        subprocess.call(statement, shell=True)
> +
> +        shutil.copy(configorig, config)
> +    else:
> +        if os.path.exists(fragment):
> +            os.unlink(fragment)
> +}
> +
> +do_fragmentconfig[nostamp] = "1"
> +addtask fragmentconfig