*/*: update for slotted Rust

guru version of this commit:
https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=01ba4dc61965ef7658a24728841c04c9a1ce4871

Closes: https://bugs.gentoo.org/943170
Closes: https://bugs.gentoo.org/943223
Closes: #260
Signed-off-by: Takuya Wakazono <pastalian46@gmail.com>

app-misc/onefetch/onefetch-2.21.0-r1.ebuild

@@ -465,6 +465,8 @@ CRATES="
 	zune-inflate@0.2.54
 "
 
+RUST_MIN_VER="1.74.0"
+
 inherit cargo shell-completion
 
 DESCRIPTION="Command-line Git information tool"
@@ -486,7 +488,6 @@ DEPEND="${RDEPEND}"
 BDEPEND="
 	dev-build/cmake
 	virtual/pkgconfig
-	>=virtual/rust-1.74.0
 	test? (
 		app-arch/xz-utils
 		dev-vcs/git
@@ -498,6 +499,7 @@ QA_FLAGS_IGNORED="usr/bin/onefetch"
 
 pkg_setup() {
 	export ZSTD_SYS_USE_PKG_CONFIG=1
+	rust_pkg_setup
 }
 
 src_install() {

app-misc/xplr/xplr-0.21.3-r1.ebuild

@@ -1,4 +1,4 @@
-# Copyright 2023 Gentoo Authors
+# Copyright 2023-2024 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=8
@@ -205,6 +205,10 @@ CRATES="
 	xdg@2.5.2
 "
 
+# <time@0.3.35
+# https://github.com/time-rs/time/issues/693
+RUST_MAX_VER="1.79.0"
+
 inherit cargo desktop lua-single xdg-utils
 
 DESCRIPTION="A hackable, minimal, fast TUI file explorer"
@@ -231,6 +235,11 @@ DEPEND="
 
 QA_FLAGS_IGNORED="usr/bin/xplr"
 
+pkg_setup() {
+	lua-single_pkg_setup
+	rust_pkg_setup
+}
+
 src_configure() {
 	cargo_src_configure --bin xplr
 }