[Buildroot] [v4 12/13] download: add flock call before dl-wrapper

[Yann E. MORIN]

Maxime, All,

On 2018-04-02 10:14 +0200, Maxime Hadjinlian spake thusly:
> In order to introduce the cache mechanisms, we need to have a lock on
> the $(LIBFOO_DL_DIR), otherwise it would be impossible to do parallel
> download (a shared DL_DIR for two buildroot instances).
> 
> To make sure the directory exists, the mkdir call has been removed from
> the dl-wrapper and put in the infrastructure.

This sentence now is no longer needed, bevause the move jas already been
done in a previous patch...

Reviewed-by: "Yann E. MORIN" <yann.morin.1998 at free.fr>

Regards,
Yann E. MORIN.

> Signed-off-by: Maxime Hadjinlian <maxime.hadjinlian at gmail.com>
> ---
>  package/pkg-download.mk | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/package/pkg-download.mk b/package/pkg-download.mk
> index 54edbae29a..05842bd430 100644
> --- a/package/pkg-download.mk
> +++ b/package/pkg-download.mk
> @@ -19,6 +19,7 @@ SSH := $(call qstrip,$(BR2_SSH))
>  export LOCALFILES := $(call qstrip,$(BR2_LOCALFILES))
>  
>  DL_WRAPPER = support/download/dl-wrapper
> +FLOCK = flock $($(PKG)_DL_DIR)/
>  
>  # DL_DIR may have been set already from the environment
>  ifeq ($(origin DL_DIR),undefined)
> @@ -92,7 +93,7 @@ endif
>  define DOWNLOAD
>  	$(Q)mkdir -p $($(PKG)_DL_DIR)/
>  	$(Q)$(if $(filter bzr cvs hg svn,$($(PKG)_SITE_METHOD)),BR_NO_CHECK_HASH_FOR=$(notdir $(1))) \
> -	$(EXTRA_ENV) $(DL_WRAPPER) \
> +	$(EXTRA_ENV) $(FLOCK) $(DL_WRAPPER) \
>  		-c $($(PKG)_DL_VERSION) \
>  		-f $(notdir $(1)) \
>  		-H $(PKGDIR)/$($(PKG)_RAWNAME).hash \
> -- 
> 2.16.2
> 
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