[Buildroot] [PATCH v2] Add option to copy config file to rootfs

[Yann E. MORIN <yann.morin.1998@free.fr>]

Nathaniel, All,

On 2014-07-31 23:26 +0800, Nathaniel Roach spake thusly:
> BR2_CONFIG_COPY copies the config file to /etc/buildroot.config
> as 0600 during target-finalize after overlay copy, but before
> post-build script install.

I wonder what would be the use-case for this?

I think the case where one would want this file in the generated
filesystem is a corner case, and that it would be better served with
a post-build script.

Regards,
Yann E. MORIN.

> ---
> Changes v1 to v2
>  - Corrected wording of config helper message (Thomas De Schampheleire)
>  - Moved order in menu to reflect actual order of the operation
> ---
>  Makefile         |  4 ++++
>  system/Config.in | 11 +++++++++++
>  2 files changed, 15 insertions(+)
> 
> diff --git a/Makefile b/Makefile
> index 022beea..cc49291 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -614,6 +614,10 @@ endif
>  			--chmod=Du+w --exclude .empty --exclude '*~' \
>  			$(d)/ $(TARGET_DIR)$(sep))
>  
> +ifeq ($(BR2_CONFIG_COPY),y)
> +	$(INSTALL) -m 0600 .config $(TARGET_DIR)/etc/buildroot.config
> +endif
> +
>  	@$(foreach s, $(call qstrip,$(BR2_ROOTFS_POST_BUILD_SCRIPT)), \
>  		$(call MESSAGE,"Executing post-build script $(s)"); \
>  		$(EXTRA_ENV) $(s) $(TARGET_DIR) $(call qstrip,$(BR2_ROOTFS_POST_SCRIPT_ARGS))$(sep))
> diff --git a/system/Config.in b/system/Config.in
> index e7e146a..a1ff23f 100644
> --- a/system/Config.in
> +++ b/system/Config.in
> @@ -339,6 +339,17 @@ config BR2_ROOTFS_OVERLAY
>  	  They are copied as-is into the rootfs, excluding files ending with
>  	  ~ and .git, .svn and .hg directories.
>  
> +config BR2_CONFIG_COPY
> +	bool "Copy buildroot .config file to rootfs"
> +	help
> +	  Copies the buildroot .config file into the rootfs.
> +	  This may be useful for debugging.
> +
> +	  It will be put in /etc/buildroot.config with a mode of 0600
> +
> +	  However, be wary that it will contain the root password
> +	  (if set) and other possibly sensitive data.
> +
>  config BR2_ROOTFS_POST_BUILD_SCRIPT
>  	string "Custom scripts to run before creating filesystem images"
>  	default ""
> -- 
> 2.0.1
> 
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