[qt4-build.eclass] Prevent users from unintentionally breaking their systems

diff --git a/eclass/qt4-build.eclass b/eclass/qt4-build.eclass
index 1656601bf799902873daa6d6b39db538727b7721..ca4d2de52c58616b030ba601c84c0acdc0ba37c3 100644 (file)
--- a/eclass/qt4-build.eclass
+++ b/eclass/qt4-build.eclass
@@ -1,6 +1,6 @@
 # Copyright 1999-2009 Gentoo Foundation
 # Distributed under the terms of the GNU General Public License v2
-# $Header: /var/cvsroot/gentoo-x86/eclass/qt4-build.eclass,v 1.65 2010/02/17 23:32:24 wired Exp $
+# $Header: /var/cvsroot/gentoo-x86/eclass/qt4-build.eclass,v 1.66 2010/03/24 14:36:28 yngwin Exp $
 
 # @ECLASS: qt4-build.eclass
 # @MAINTAINER:
@@ -69,6 +69,17 @@ S=${WORKDIR}/${MY_P}
 qt4-build_pkg_setup() {
        [[ ${EAPI} == 2 ]] && use !prefix && EPREFIX=
 
+       # Protect users by not allowing downgrades between releases
+       # Downgrading revisions within the same release should be allowed
+       if has_version '>'${CATEGORY}/${P}-r9999 ; then
+               if [[ -z $I_KNOW_WHAT_I_AM_DOING ]] ; then
+                       eerror "Sanity check to keep you from breaking your system:"
+                       eerror "  Downgrading Qt is completely unsupported and will break your system!"
+                       die "aborting to save your system"
+               else
+                       ewarn "Downgrading Qt is completely unsupported and will break your system!"
+               fi
+       fi
 
        PATH="${S}/bin${PATH:+:}${PATH}"
        if [[ ${CHOST} != *-darwin* ]]; then
@@ -79,7 +90,8 @@ qt4-build_pkg_setup() {
                # platform detection. Note: needs to come before any directories to
                # avoid extract failure.
                [[ ${CHOST} == *-apple-darwin* ]] && \
-                       QT4_EXTRACT_DIRECTORIES="src/gui/kernel/qapplication_mac.mm ${QT4_EXTRACT_DIRECTORIES}"
+                       QT4_EXTRACT_DIRECTORIES="src/gui/kernel/qapplication_mac.mm
+                               ${QT4_EXTRACT_DIRECTORIES}"
        fi
 
        # Make sure ebuilds use the required EAPI
@@ -92,8 +104,6 @@ qt4-build_pkg_setup() {
 
        if ! version_is_at_least 4.1 $(gcc-version); then
                ewarn "Using a GCC version lower than 4.1 is not supported!"
-               echo
-               ebeep 3
        fi
 }