Fix building of photon live patch from kernel source RPM

Signed-off-by: Guruswamy Basavaiah <guruswamy.basavaiah@broadcom.com>

Author: bguruswamy

kpatch-build/kpatch-build

@@ -855,16 +855,28 @@ if [[ ${#PATCH_LIST[@]} -eq 0 ]]; then
 fi
 
 trace_on
+# Don't check external file.
+# shellcheck disable=SC1090
+if [[ -z "$USERSRCDIR" ]] && [[ -f "$RELEASE_FILE" ]]; then
+	source "$RELEASE_FILE"
+	DISTRO="$ID"
+fi
+
 
 if [[ -n "$SRCRPM" ]]; then
 	if  [[ -n "$ARCHVERSION" ]]; then
 		warn "--archversion is incompatible with --sourcerpm"
 		exit 1
 	fi
 	rpmname="$(basename "$SRCRPM")"
-	ARCHVERSION="${rpmname%.src.rpm}.$(uname -m)"
+	if [[ "$DISTRO" = photon ]]; then
+		ARCHVERSION="${rpmname%.src.rpm}"
+	else
+		ARCHVERSION="${rpmname%.src.rpm}.$(uname -m)"
+	fi
 	ARCHVERSION="${ARCHVERSION#kernel-}"
 	ARCHVERSION="${ARCHVERSION#alt-}"
+	ARCHVERSION="${ARCHVERSION#linux-}"
 fi
 
 if [[ -n "$OOT_MODULE" ]] &&  [[ -z "$OOT_MODULE_SRCDIR" ]]; then
@@ -914,13 +926,6 @@ fi
 
 [[ "$SKIPCLEANUP" -eq 0 ]] && trap cleanup EXIT INT TERM HUP
 
-# Don't check external file.
-# shellcheck disable=SC1090
-if [[ -z "$USERSRCDIR" ]] && [[ -f "$RELEASE_FILE" ]]; then
-	source "$RELEASE_FILE"
-	DISTRO="$ID"
-fi
-
 KVER="${ARCHVERSION%%-*}"
 if [[ "$ARCHVERSION" =~ - ]]; then
 	# handle flavor extension on Photon ex) -rt, -esx
@@ -932,12 +937,12 @@ if [[ "$ARCHVERSION" =~ - ]]; then
 		KREL="${KREL%-*}"
 		KREL="${KREL#*-}"
 
-		PH_TAG="${ARCHVERSION##*.}"
-		PH_FLAVOR="${PH_TAG##*-}"
-		PH_TAG="${PH_TAG%%-*}"
-
-		# if no flavor, these will be the same
-		[[ "$PH_FLAVOR" = "$PH_TAG" ]] && PH_FLAVOR=""
+		PH_TAG=$(echo "$ARCHVERSION" | grep -oE 'ph[0-9]+')
+		if [[ "$ARCHVERSION" =~ (^|[-\.])(rt|esx|aws)($|[-\.]) ]]; then
+			PH_FLAVOR="${BASH_REMATCH[2]}"
+		else
+			PH_FLAVOR=""
+		fi
 	else
 		KREL="${ARCHVERSION##*-}"
 	fi
@@ -1015,11 +1020,9 @@ else
 			if [ -z "$SRCRPM" ]; then
 				SRCRPM="$TEMPDIR/kernel$ALT-$KVER-$KREL.src.rpm"
 			fi
-
 		fi
 
 		echo "Unpacking kernel source"
-
 		if [[ "$DISTRO" = photon ]]; then
 			[[ -n "$PH_FLAVOR" ]] && SPECNAME="linux-$PH_FLAVOR.spec" || SPECNAME="linux.spec"
 		else
@@ -1030,7 +1033,7 @@ else
 
 		# Define dist tag to handle rpmbuild of the linux src rpm in Photon
 		if [[ "$DISTRO" = photon ]] && [ "$(rpm -E %dist)" = "%dist" ]; then
-			sed -i "1s/^/%define dist .$PH_TAG/" "$RPMTOPDIR"/SPECS/"$SPECNAME"
+			sed -i "1s|^|%define dist .$PH_TAG\n\n|" "$RPMTOPDIR"/SPECS/"$SPECNAME"
 		fi
 
 		rpmbuild -D "_topdir $RPMTOPDIR" -bp --nodeps "--target=$(uname -m)" "$RPMTOPDIR"/SPECS/"$SPECNAME" 2>&1 | logger || die "rpmbuild -bp failed.  you may need to run 'yum-builddep kernel' first."
@@ -1042,19 +1045,6 @@ else
 		elif [[ "$DISTRO" = opencloudos ]]; then
 			mv "$RPMTOPDIR"/BUILD/kernel-*/kernel-* "$KERNEL_SRCDIR" 2>&1 | logger || die
 		elif [[ "$DISTRO" = photon ]]; then
-			# Photon has some files that are copied over during the build section of the spec file (instead of prep)
-			# These change occasionally, so check they exist before copying
-			ls "$RPMTOPDIR"/BUILD/fips*canister* &> /dev/null && ( cp -rT "$RPMTOPDIR"/BUILD/fips*canister* "$RPMTOPDIR"/BUILD/linux-"$KVER"/crypto | logger || die )
-			[[ -f "$RPMTOPDIR"/SOURCES/fips_canister-kallsyms ]] && ( cp "$RPMTOPDIR"/SOURCES/fips_canister-kallsyms rpmbuild/BUILD/linux-"$KVER"/crypto | logger || die )
-
-			if [[ -z "$CONFIGFILE" ]]; then
-				# Photon has multiple config files per src rpm sometimes, and naming is not consistent.
-				# So do our best to find the right one by parsing the spec file
-				SRC_CFG=$(rpmspec -P -D "_topdir $RPMTOPDIR" "$RPMTOPDIR"/SPECS/"$SPECNAME" | awk '/^cp .*\/SOURCES\/config.* \.config$/{print $2}')
-				[[ -z "$SRC_CFG" ]] && die "Failed to locate kernel config file"
-				SRC_CFG="${SRC_CFG##*/}"
-				cp "$RPMTOPDIR"/SOURCES/"$SRC_CFG" "$RPMTOPDIR"/BUILD/linux-"$KVER" | logger || die
-			fi
 			mv "$RPMTOPDIR"/BUILD/linux-"$KVER" "$KERNEL_SRCDIR" 2>&1 | logger || die
 		else
 			mv "$RPMTOPDIR"/BUILD/kernel-*/linux-* "$KERNEL_SRCDIR" 2>&1 | logger || die
@@ -1072,20 +1062,14 @@ else
 		if [[ "$DISTRO" = openEuler ]] || [[ "$DISTRO" = opencloudos ]]; then
 			[[ -z "$CONFIGFILE" ]] && CONFIGFILE="/boot/config-${ARCHVERSION}"
 		elif [[ "$DISTRO" = photon ]]; then
-			[[ -z "$CONFIGFILE" ]] && CONFIGFILE="$KERNEL_SRCDIR/$SRC_CFG"
-
-			# modify config file here to get the right vermagic, as Photon does not always listen to localversion file
-			if [[ -z "$PH_FLAVOR" ]]; then
-				sed -i s/^CONFIG_LOCALVERSION=\".*\"/CONFIG_LOCALVERSION=\"-"$KREL"."$PH_TAG"\"/g "$CONFIGFILE" || die
-			else
-				sed -i s/^CONFIG_LOCALVERSION=\".*\"/CONFIG_LOCALVERSION=\"-"$KREL"."$PH_TAG"-"$PH_FLAVOR"\"/g "$CONFIGFILE" || die
-			fi
-
+			[[ -z "$CONFIGFILE" ]] && CONFIGFILE="$KERNEL_SRCDIR"/.config
 		else
 			[[ -z "$CONFIGFILE" ]] && CONFIGFILE="$KERNEL_SRCDIR/configs/kernel$ALT-$KVER-$ARCH.config"
 		fi
+		if [[ ! "$DISTRO" = photon ]]; then
+			(cd "$KERNEL_SRCDIR" && make mrproper 2>&1 | logger) || die
+		fi
 
-		(cd "$KERNEL_SRCDIR" && make mrproper 2>&1 | logger) || die
 
 	elif is_supported_deb_distro "$DISTRO"; then