[Buildroot] [PATCHv4] core/pkg-generic: check proper package installation

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

Arnout, All,

On 2015-11-06 23:55 +0100, Arnout Vandecappelle spake thusly:
> On 06-11-15 20:15, Yann E. MORIN wrote:
> > Some packages misbehave, and install files in either of;
> >   - $(STAGING_DIR)/$(O) or $(TARGET_DIR)/$(O),
> >   - $(STAGING_DIR)/$(HOST_DIR) or $(TARGET_DIR)/$(HOST_DIR).
> > 
> > One common reason for that is that pkgconf now prepends the sysroot path
> > to all the paths it returns. Other reasons vary, but are mostly due to
> > poorly writen generic-packages.
> > 
> > Add a check for those locations, as part of the command blocks for the
> > target and staging installs.
> > 
> > Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
> > Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
> > Cc: Gustavo Zacarias <gustavo@zacarias.com.ar>
> > Cc: Arnout Vandecappelle <arnout@mind.be>
> > Cc: Peter Seiderer <ps.report@gmx.net>
> > Cc: Romain Naour <romain.naour@openwide.fr>
> > 
> > ---
[--SNIP--]
> >  ################################################################################
> > +# check-install-dirs -- check that packages do not incorrectly install files
> > +# into incorrect locations
> > +#
> > +# argument 2 is the base directory to check for
> > +################################################################################
> > +define check-install-dirs
> > +	$(Q)if [ -d $(1)/$(HOST_DIR) ]; then \
> > +		printf "ERROR: package %s installs files in %s\n" $($(PKG)_NAME) $(1)$(HOST_DIR); \
> 
>  Missing / between $(1) and $(HOST_DIR).

Normally not needed, because $(HOST_DIR) and $(O) are absolute paths, so
there is already a leading '/' .

So:
  - I kept a separating '/' in the tests to be extra-ultra sure (but it
    arguably could be dropped),
  - I did not add that extra '/' in the message so it is nicer when
    presented to the user.

> > +		exit 1; \
> > +	fi
> > +	$(Q)if [ -d $(1)/$(O) ]; then \
> > +		printf "ERROR: package %s installs files in %s\n" $($(PKG)_NAME) $(1)$(O); \
> 
>  Ditto.

Ditto. ;-)

> > +		exit 1; \
> > +	fi
> 
>  I think it's better without this duplication so with a second parameter and
> calling the function twice.

Well, it's either duplication of the if-block, or duplication of the
call sites. And I think it is better to have duplication of the
if-blocks, in cas we need to check for mor eloactions, otherwise we'd
have to duplicate even more the call sites...

Regards,
Yann E. MORIN.

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