For new-slot package installation, I suggest that emerge show USE flags added/deleted in comparison with highest installed other-slot package instance. Currently such USE flags are not marked in any way, which makes it much harder to notice new features in new versions in new slots. (Users have to manually compare ebuilds or carefully examine emerge output for both currently installed slot and new slot.) Theoretically some complicated algorithm could be invented for choosing other slot in situations when an older version in separate slot would be installed (e.g. installing sys-devel/gcc:7.4.0 when already installed slots are [6.5.0, 7.3.0, 8.2.0]), but such situations are very rare, so I suggest to not complicate code. Example output: Before change: [ebuild NS ] sys-devel/llvm-7.0.1:7::gentoo [5.0.2:5::gentoo, 6.0.1-r2:6::gentoo] USE="gold libffi ncurses xml -debug -doc -exegesis -libedit -test -xar" ABI_X86="32 (64) -x32" LLVM_TARGETS="(X86) -AArch64 -AMDGPU -ARM -BPF -Hexagon -Lanai -MSP430 -Mips -NVPTX -PowerPC -Sparc -SystemZ -XCore" 0 KiB After change: [ebuild NS ] sys-devel/llvm-7.0.1:7::gentoo [5.0.2:5::gentoo, 6.0.1-r2:6::gentoo] USE="gold libffi ncurses xml -debug -doc -exegesis% -libedit -test -xar" ABI_X86="32 (64) -x32" LLVM_TARGETS="(X86) -AArch64 -AMDGPU -ARM -BPF -Hexagon -Lanai -MSP430 -Mips -NVPTX -PowerPC -Sparc -SystemZ -XCore" 0 KiB "-exegesis" has gained yellow color and "%" suffix.
Created attachment 561926 [details, diff] Patch
The bug has been referenced in the following commit(s): https://gitweb.gentoo.org/proj/portage.git/commit/?id=9cce0dad3f45b15f8f069a552ac6c91b9dfdd769 commit 9cce0dad3f45b15f8f069a552ac6c91b9dfdd769 Author: Arfrever Frehtes Taifersar Arahesis <Arfrever@Apache.Org> AuthorDate: 2019-01-18 08:42:09 +0000 Commit: Zac Medico <zmedico@gentoo.org> CommitDate: 2019-01-20 07:05:17 +0000 emerge: compare new slot USE to installed slot For new-slot package installation, show USE flags added/deleted in comparison with highest installed other-slot package instance Bug: https://bugs.gentoo.org/675756 Signed-off-by: Arfrever Frehtes Taifersar Arahesis <Arfrever@Apache.Org> Signed-off-by: Zac Medico <zmedico@gentoo.org> lib/_emerge/resolver/output.py | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-)
The bug has been referenced in the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=7d999af4a47bf55e53e54713d98d145f935935c1 commit 7d999af4a47bf55e53e54713d98d145f935935c1 Author: Zac Medico <zmedico@gentoo.org> AuthorDate: 2019-01-21 00:01:42 +0000 Commit: Zac Medico <zmedico@gentoo.org> CommitDate: 2019-01-21 00:08:55 +0000 sys-apps/portage: version bump to 2.3.57 #675756 emerge: compare new SLOT USE to installed SLOT #675826 INSTALL_MASK scalability: minimize fnmatch calls #675828 pid-sandbox: fix child process signal disposition Bug: https://bugs.gentoo.org/671498 Bug: https://bugs.gentoo.org/675756 Bug: https://bugs.gentoo.org/675826 Bug: https://bugs.gentoo.org/675828 Package-Manager: Portage-2.3.57, Repoman-2.3.12 Signed-off-by: Zac Medico <zmedico@gentoo.org> sys-apps/portage/Manifest | 1 + sys-apps/portage/portage-2.3.57.ebuild | 271 +++++++++++++++++++++++++++++++++ 2 files changed, 272 insertions(+)
Fixed in portage-2.3.62.
