Re: [gentoo-dev] [PATCH] xdg-utils.eclass: don't call binaries from ROOT

[James Le Cuirot <chewi@gentoo.org>]

On Wed, 03 Oct 2018 09:33:53 +0200
Michał Górny <mgorny@gentoo.org> wrote:

> On Tue, 2018-10-02 at 22:16 -0400, Mike Gilbert wrote:
> > Avoid calling binaries that may have been compiled against different
> > libraries or even cross-compiled for an incomatible arch.
> > 
> > Instead, always call the binaries installed in BROOT (/), if
> > available.  
> 
> Except BROOT doesn't have to be / (that's why we made it into
> a variable)!  Also, wouldn't it be sufficient to use PATH lookup here
> and let the PM handle providing the correct root?

To be clearer, EPREFIX refers to the target host, not the build host.
The build host may have a different prefix and that is the point of
BROOT. But as mgorny says, you should just rely on the PATH. We
primarily added BROOT for cases where using the PATH wasn't viable.

> > Signed-off-by: Mike Gilbert <floppym@gentoo.org>
> > ---
> >  eclass/xdg-utils.eclass | 4 ++--
> >  1 file changed, 2 insertions(+), 2 deletions(-)
> > 
> > diff --git a/eclass/xdg-utils.eclass b/eclass/xdg-utils.eclass
> > index fe1eef213ea4..b133de093082 100644
> > --- a/eclass/xdg-utils.eclass
> > +++ b/eclass/xdg-utils.eclass
> > @@ -67,7 +67,7 @@ xdg_environment_reset() {
> >  # Updates the .desktop files database.
> >  # Generates a list of mimetypes linked to applications that can
> > handle them xdg_desktop_database_update() {
> > -	local updater="${EROOT%/}${DESKTOP_DATABASE_UPDATE_BIN}"
> > +	local updater="${EPREFIX}${DESKTOP_DATABASE_UPDATE_BIN}"
> >  
> >  	if [[ ${EBUILD_PHASE} != post* ]] ; then
> >  		die "xdg_desktop_database_update must be used in
> > pkg_post* phases." @@ -88,7 +88,7 @@ xdg_desktop_database_update() {
> >  # Update the mime database.
> >  # Creates a general list of mime types from several sources
> >  xdg_mimeinfo_database_update() {
> > -	local updater="${EROOT%/}${MIMEINFO_DATABASE_UPDATE_BIN}"
> > +	local updater="${EPREFIX}${MIMEINFO_DATABASE_UPDATE_BIN}"
> >  
> >  	if [[ ${EBUILD_PHASE} != post* ]] ; then
> >  		die "xdg_mimeinfo_database_update must be used in
> > pkg_post* phases."