[Buildroot] [PATCH 2/4] skeleton: use BR2_SYSTEM_DEFAULT_PATH as default PATH

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

On 2018-12-17 16:51 -0800, Markus Mayer spake thusly:
> We substitute the path specified in system/skeleton/etc/profile with
> the path specified in the configuration varialbe
> BR2_SYSTEM_DEFAULT_PATH.
> 
> Signed-off-by: Markus Mayer <mmayer@broadcom.com>
> ---
>  package/skeleton-init-common/skeleton-init-common.mk | 3 +++
>  system/skeleton/etc/profile                          | 1 +
>  2 files changed, 4 insertions(+)
> 
> diff --git a/package/skeleton-init-common/skeleton-init-common.mk b/package/skeleton-init-common/skeleton-init-common.mk
> index e8a052205268..358336599389 100644
> --- a/package/skeleton-init-common/skeleton-init-common.mk
> +++ b/package/skeleton-init-common/skeleton-init-common.mk
> @@ -22,6 +22,9 @@ define SKELETON_INIT_COMMON_INSTALL_TARGET_CMDS
>  	$(call SYSTEM_LIB_SYMLINK,$(TARGET_DIR))
>  	$(INSTALL) -m 0644 support/misc/target-dir-warning.txt \
>  		$(TARGET_DIR_WARNING_FILE)
> +	$(SED) '/.*the PATH below may be replaced.*/d' $(TARGET_DIR)/etc/profile
> +	$(SED) 's|PATH=.*|PATH=$(BR2_SYSTEM_DEFAULT_PATH)|' \
> +		$(TARGET_DIR)/etc/profile
>  endef
>  
>  # We don't care much about what goes in staging, as long as it is
> diff --git a/system/skeleton/etc/profile b/system/skeleton/etc/profile
> index 1255d23ff40d..5ed47743d8f4 100644
> --- a/system/skeleton/etc/profile
> +++ b/system/skeleton/etc/profile
> @@ -1,3 +1,4 @@
> +# At install, the PATH below may be replaced with BR2_SYSTEM_DEFAULT_PATH.

No need for the boilerplate, just:

    export PATH=@PATH@

This is enough to understand the value is actually replaced at some
point in the build process. This is so very similar to what the
autotools do. And thus, the sed expression becomes:

    $(SED) 's, at PATH@,$(BR2_SYSTEM_DEFAULT_PATH),' \
        $(TARGET_DIR)/etc/profile

(yeah, I see you went for the code snippet I initially provided, but
you should learn that you should not always do take what I say to
the letter! ;-] )

Regards,
Yann E. MORIN.

>  export PATH=/bin:/sbin:/usr/bin:/usr/sbin
>  
>  if [ "$PS1" ]; then
> -- 
> 2.17.1
> 

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