[Buildroot] [PATCH 03/12] package/pkg-utils.mk: rework implementation of extractor-system-dependency

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

Romain, All,

On 2019-12-14 22:37 +0100, Romain Naour spake thusly:
> Le 10/12/2019 ? 22:59, Thomas Petazzoni a ?crit?:
> > Now that we have the EXTRACTOR_PKG_DEPENDENCY.* variables available,
> > we can use them to implement extractor-system-dependency: if for a
> > given archive type, the corresponding EXTRACTOR_PKG_DEPENDENCY.<type>
> > variable is empty, then it means we need the corresponding extractor
> > tool to be provided by the system.
> > 
> > Following this, EXTRACTOR_DEPENDENCY_PRECHECKED_EXTENSIONS is no
> > longer used, so we can drop it from support/dependencies/.
> > 
> > Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
> > ---
> >  package/pkg-utils.mk                     | 4 ++--
> >  support/dependencies/check-host-lzip.mk  | 1 -
> >  support/dependencies/check-host-xzcat.mk | 1 -
> >  3 files changed, 2 insertions(+), 4 deletions(-)
> > 
> > diff --git a/package/pkg-utils.mk b/package/pkg-utils.mk
> > index 35a441e0aa..d324934dba 100644
> > --- a/package/pkg-utils.mk
> > +++ b/package/pkg-utils.mk
> > @@ -62,8 +62,8 @@ extractor-pkg-dependency = $(EXTRACTOR_PKG_DEPENDENCY$(suffix $(1)))
> >  # $(firstword) is used here because the extractor can have arguments,
> >  # like ZCAT="gzip -d -c", and to check for the dependency we only want
> >  # 'gzip'.
> > -extractor-system-dependency = $(firstword $(INFLATE$(filter-out \
> > -	$(EXTRACTOR_DEPENDENCY_PRECHECKED_EXTENSIONS),$(suffix $(1)))))
> > +extractor-system-dependency = $(if $(EXTRACTOR_PKG_DEPENDENCY$(suffix $(1))),,\
> 
> I would add a "." after EXTRACTOR_PKG_DEPENDENCY because we want to use
> "EXTRACTOR_PKG_DEPENDENCY.$(suffix $(1))"

In a Makefile:
    FOO = a.b
    $(info $(suffix $(FOO)))

would yield:
    .b

so we already have the dot.

Regards,
Yann E. MORIN.

> Best regards,
> Romain
> 
> 
> > +	$(firstword $(INFLATE$(suffix $(1)))))
> >  
> >  # check-deprecated-variable -- throw an error on deprecated variables
> >  # example:
> > diff --git a/support/dependencies/check-host-lzip.mk b/support/dependencies/check-host-lzip.mk
> > index cdd784058c..98a4f42388 100644
> > --- a/support/dependencies/check-host-lzip.mk
> > +++ b/support/dependencies/check-host-lzip.mk
> > @@ -1,5 +1,4 @@
> >  ifeq (,$(call suitable-host-package,lzip,$(LZCAT)))
> >  BR2_LZIP_HOST_DEPENDENCY = host-lzip
> > -EXTRACTOR_DEPENDENCY_PRECHECKED_EXTENSIONS += .lz
> >  LZCAT = $(HOST_DIR)/bin/lzip -d -c
> >  endif
> > diff --git a/support/dependencies/check-host-xzcat.mk b/support/dependencies/check-host-xzcat.mk
> > index e5d72f95dd..9a78a8f38a 100644
> > --- a/support/dependencies/check-host-xzcat.mk
> > +++ b/support/dependencies/check-host-xzcat.mk
> > @@ -3,6 +3,5 @@
> >  
> >  ifeq (,$(call suitable-host-package,xzcat,$(XZCAT)))
> >  BR2_XZCAT_HOST_DEPENDENCY = host-xz
> > -EXTRACTOR_DEPENDENCY_PRECHECKED_EXTENSIONS += .xz .lzma
> >  XZCAT = $(HOST_DIR)/bin/xzcat
> >  endif
> > 
> 

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