sys-fs/bcachefs-tools: add support out-of-tree module compile

Signed-off-by: Alexander Miroshnichenko <alex@millerson.name>

metadata/layout.conf

@@ -1,4 +1,4 @@
-masters = gentoo
+masters = guru gentoo
 thin-manifests = true
 sign-manifests = false
 # Needed for profiles parent with repo syntax

sys-fs/bcachefs-tools/bcachefs-tools-1.31.0.ebuild

@@ -86,15 +86,14 @@ CRATES="
 	zeroize@1.8.1
 	zeroize_derive@1.4.2
 "
-
+MODULES_OPTIONAL_IUSE="modules"
+MODULE_S="module/src/${PN%-*}-${PV}"
 LLVM_COMPAT=( {17..20} )
 PYTHON_COMPAT=( python3_{11..14} )
 RUST_MIN_VER="1.77.0"
 VERIFY_SIG_OPENPGP_KEY_PATH=/usr/share/openpgp-keys/kentoverstreet.asc
 
-MODULES_OPTIONAL_IUSE="modules"
-
-inherit cargo flag-o-matic llvm-r1 python-any-r1 shell-completion toolchain-funcs unpacker verify-sig linux-mod-r1
+inherit cargo flag-o-matic linux-mod-r1 llvm-r1 python-any-r1 shell-completion toolchain-funcs unpacker verify-sig
 
 DESCRIPTION="Tools for bcachefs"
 HOMEPAGE="https://bcachefs.org/"
@@ -114,7 +113,7 @@ LICENSE="GPL-2"
 # Dependent crate licenses
 LICENSE+=" Apache-2.0 BSD ISC MIT Unicode-DFS-2016"
 SLOT="0"
-IUSE="fuse verify-sig module-src"
+IUSE="fuse verify-sig"
 RESTRICT="test"
 
 DEPEND="
@@ -157,10 +156,7 @@ pkg_setup() {
 	rust_pkg_setup
 	llvm-r1_pkg_setup
 	python-any-r1_pkg_setup
-
-    if use modules; then
-	    linux-mod-r1_pkg_setup
-    fi
+	use modules && linux-mod-r1_pkg_setup
 }
 
 src_unpack() {
@@ -192,6 +188,9 @@ src_prepare() {
 		-e '/^CFLAGS/s:-g::' \
 		-i Makefile || die
 	append-lfs-flags
+
+	use modules && emake DESTDIR="${WORKDIR}" PREFIX="/module" install_dkms && \
+	sed -i 's/^        /\t/g' "${WORKDIR}/${MODULE_S}/Makefile" || die
 }
 
 src_compile() {
@@ -211,20 +210,11 @@ src_compile() {
 		./bcachefs completions ${shell} > ${shell}.completion || die
 	done
 
-    local modlist=( "bcachefs=:libbcachefs::bcachefs.ko" )
-    linux-mod-r1_src_compile
-
-    local modlist=( bcachefs=kernel/drivers/fs:libbcachefs::module )
-    local modargs=(
-            KERNELDIR=${KV_OUT_DIR}
-    )
-    use modules && linux-mod-r1_src_compile
+	local modlist=( "bcachefs=:../${MODULE_S}::default" )
+	use modules && linux-mod-r1_src_compile
 }
 
 src_install() {
-	use modules && linux-mod-r1_src_install	
-    use module-src && emake DESTDIR="${D}" PREFIX="${EPREFIX}/usr" install_dkms
-
 	into /
 	dosbin bcachefs
 
@@ -238,6 +228,8 @@ src_install() {
 		dosym bcachefs /sbin/mount.fuse.bcachefs
 	fi
 
+	use modules && linux-mod-r1_src_install
+
 	newbashcomp bash.completion bcachefs
 	newfishcomp fish.completion bcachefs.fish
 	newzshcomp zsh.completion _bcachefs
@@ -252,43 +244,5 @@ pkg_postinst() {
 		ewarn "You have been warned."
 	fi
 
-    if use module-src && ! use module; then
-        einfo
-        einfo "You have enabled the module-src USE flag without the module USE"
-        einfo "flag. This means that sources are installed to"
-        einfo "${ROOT}/usr/src/bcachefs-${PV} instead of having the"
-        einfo "kernel module compiled. You will need to compile the module"
-        einfo "yourself or use dkms. Most likely, you don't want this USE flag, and should"
-        einfo "rather use USE=module"
-        einfo
-    fi
-
-    if use modules; then
-        linux-mod-r1_pkg_postinst
-        local old new
-        if [[ $(uname -r) != "${KV_FULL}" ]]; then
-                ewarn
-                ewarn "You have just built bcachefs for kernel ${KV_FULL}, yet the currently running"
-                ewarn "kernel is $(uname -r). If you intend to use this bcachefs module on the currently"
-                ewarn "running machine, you will first need to reboot it into the kernel ${KV_FULL}, for"
-                ewarn "which this module was built."
-                ewarn
-        elif [[ -f /sys/module/bcachefs/version ]] && \
-             old="$(< /sys/module/bcachefs/version)" && \
-             new="$(modinfo -F version "${ROOT}/lib/modules/${KV_FULL}/net/bcachefs.ko" 2>/dev/null)" && \
-             [[ $old != "$new" ]]; then
-                ewarn
-                ewarn "You appear to have just upgraded bcachefs from version v$old to v$new."
-                ewarn "However, the old version is still running on your system. In order to use the"
-                ewarn "new version, you will need to remove the old module and load the new one. As"
-                ewarn "root, you can accomplish this with the following commands:"
-                ewarn
-                ewarn "    # rmmod bcachefs"
-                ewarn "    # modprobe bcachefs"
-                ewarn
-                ewarn "Do note that doing this will remove currently mounted bcachefs filesystems, so you may want"
-                ewarn "to gracefully remove them yourself prior."
-                ewarn
-        fi
-    fi
+	use modules && linux-mod-r1_pkg_postinst
 }