Make kernel config filename customizable

This commit will make kernel config filename used by --save-config
feature customizable like previous commit 769a07fd3e947 did for
initramfs and kernel image.

Signed-off-by: Thomas Deutschmann <whissi@gentoo.org>

5 files changed, 31 insertions, 3 deletions

diff --git a/defaults/config.sh b/defaults/config.sh
index fed53550..8c7cf7e8 100644
--- a/defaults/config.sh
+++ b/defaults/config.sh
@@ -23,6 +23,7 @@ KERNEL_SUPPORT_MICROCODE=no
 #
 DEFAULT_INITRAMFS_FILENAME="initramfs-%%KV%%.img"
 DEFAULT_INITRAMFS_SYMLINK_NAME="initramfs"
+DEFAULT_KERNEL_CONFIG_FILENAME="kernel-config-%%KV%%"
 DEFAULT_KERNEL_FILENAME="vmlinuz-%%KV%%"
 DEFAULT_KERNEL_SYMLINK_NAME="kernel"
 DEFAULT_SYSTEMMAP_FILENAME="System.map-%%KV%%"
diff --git a/doc/genkernel.8.txt b/doc/genkernel.8.txt
index e00e0287..7cd65fee 100644
--- a/doc/genkernel.8.txt
+++ b/doc/genkernel.8.txt
@@ -506,6 +506,12 @@ NOTE: No modules outside of the initramfs will be included!
     Archive file created using tar containing kernel binary, content of
     '/lib/modules' and the kernel config after the callbacks have run.
 
+*--kernel-config-filename*=<...>::
+Set the kernel config filename used by *--save-config*. Please see
+*--kernel-filename* option for available placeholders and restrictions.
++
+By default, kernel config filename will be set to 'kernel-config-%%KV%%'.
+
 *--kernel-filename*=<...>::
 Set kernel filename which will be used when kernel will be installed
 into *BOOTDIR* (implies *--install* option). The following placeholders
diff --git a/gen_cmdline.sh b/gen_cmdline.sh
index aa54c29f..a34a7396 100755
--- a/gen_cmdline.sh
+++ b/gen_cmdline.sh
@@ -193,6 +193,8 @@ longusage() {
   echo "	--postclear		Clear all tmp files and caches after genkernel has run"
   echo "	--no-postclear		Do not clean up after genkernel has run"
   echo "  Output Settings"
+  echo "	--kernel-config-filename=<...>"
+  echo "				Set kernel config filename"
   echo "	--kernel-filename=<...>"
   echo "				Set kernel filename"
   echo "	--kernel-symlink-name=<...>"
@@ -701,6 +703,10 @@ parse_cmdline() {
 			CMD_KERNCACHE="${*#*=}"
 			print_info 3 "KERNCACHE: ${CMD_KERNCACHE}"
 			;;
+		--kernel-config-filename=*)
+			CMD_KERNEL_CONFIG_FILENAME="${*#*=}"
+			print_info 3 "CMD_KERNEL_CONFIG_FILENAME: ${CMD_KERNEL_CONFIG_FILENAME}"
+			;;
 		--kernel-filename=*)
 			CMD_KERNEL_FILENAME="${*#*=}"
 			print_info 3 "CMD_KERNEL_FILENAME: ${CMD_KERNEL_FILENAME}"
diff --git a/gen_configkernel.sh b/gen_configkernel.sh
index 2f9a6a56..78049493 100755
--- a/gen_configkernel.sh
+++ b/gen_configkernel.sh
@@ -44,7 +44,7 @@ determine_kernel_config_file() {
 		else
 			local -a user_kconfig_candidates
 
-			# Always prefer kernel config based on actual $KV reading
+			# Always prefer kernel config based on set --kernel-config-filename
 			user_kconfig_candidates+=( "/etc/kernels/${GK_FILENAME_CONFIG}" )
 
 			if [ -n "${KERNEL_LOCALVERSION}" -a "${KERNEL_LOCALVERSION}" != "UNSET" ]
diff --git a/gen_determineargs.sh b/gen_determineargs.sh
index 14ef757f..6c5d01c4 100755
--- a/gen_determineargs.sh
+++ b/gen_determineargs.sh
@@ -87,7 +87,6 @@ determine_KV() {
 determine_output_filenames() {
 	print_info 5 '' 1 0
 
-	GK_FILENAME_CONFIG="kernel-config-${KV}"
 	GK_FILENAME_KERNELZ="kernelz-${KV}"
 	GK_FILENAME_TEMP_CONFIG="config-${ARCH}-${KV}"
 	GK_FILENAME_TEMP_INITRAMFS="initramfs-${ARCH}-${KV}"
@@ -96,7 +95,10 @@ determine_output_filenames() {
 	GK_FILENAME_TEMP_SYSTEMMAP="System.map-${ARCH}-${KV}"
 
 	# Do we have values?
-	if [ -z "${KERNEL_FILENAME}" ]
+	if [ -z "${KERNEL_CONFIG_FILENAME}" ]
+	then
+		gen_die "--kernel-config-filename must be set to a non-empty value!"
+	elif [ -z "${KERNEL_FILENAME}" ]
 	then
 		gen_die "--kernel-filename must be set to a non-empty value!"
 	elif [ -z "${KERNEL_SYMLINK_NAME}" ]
@@ -116,6 +118,17 @@ determine_output_filenames() {
 		gen_die "--initramfs-filename must be set to a non-empty value!"
 	fi
 
+	# Kernel .config
+	GK_FILENAME_CONFIG=$(arch_replace "${KERNEL_CONFIG_FILENAME}")
+	GK_FILENAME_CONFIG=$(kv_replace "${GK_FILENAME_CONFIG}")
+
+	if [ -z "${GK_FILENAME_CONFIG}" ]
+	then
+		gen_die "Internal error: Variable 'GK_FILENAME_CONFIG' is empty!"
+	else
+		print_info 5 "GK_FILENAME_CONFIG set to '${GK_FILENAME_CONFIG}' (was: '${KERNEL_CONFIG_FILENAME}')"
+	fi
+
 	# Kernel
 	GK_FILENAME_KERNEL=$(arch_replace "${KERNEL_FILENAME}")
 	GK_FILENAME_KERNEL=$(kv_replace "${GK_FILENAME_KERNEL}")
@@ -221,6 +234,7 @@ determine_output_filenames() {
 	fi
 
 	local -a filename_vars
+	filename_vars+=( 'GK_FILENAME_CONFIG;--kernel-config-filename' )
 	filename_vars+=( 'GK_FILENAME_KERNEL;--kernel-filename' )
 	filename_vars+=( 'GK_FILENAME_KERNEL_SYMLINK;--kernel-symlink-name' )
 	filename_vars+=( 'GK_FILENAME_INITRAMFS;--initramfs-filename' )
@@ -275,6 +289,7 @@ determine_real_args() {
 	set_config_with_override BOOL   KERNEL_SOURCES                        CMD_KERNEL_SOURCES                        "yes"
 	set_config_with_override STRING INITRAMFS_FILENAME                    CMD_INITRAMFS_FILENAME                    "${DEFAULT_INITRAMFS_FILENAME}"
 	set_config_with_override STRING INITRAMFS_SYMLINK_NAME                CMD_INITRAMFS_SYMLINK_NAME                "${DEFAULT_INITRAMFS_SYMLINK_NAME}"
+	set_config_with_override STRING KERNEL_CONFIG_FILENAME                CMD_KERNEL_CONFIG_FILENAME                "${DEFAULT_KERNEL_CONFIG_FILENAME}"
 	set_config_with_override STRING KERNEL_FILENAME                       CMD_KERNEL_FILENAME                       "${DEFAULT_KERNEL_FILENAME}"
 	set_config_with_override STRING KERNEL_SYMLINK_NAME                   CMD_KERNEL_SYMLINK_NAME                   "${DEFAULT_KERNEL_SYMLINK_NAME}"
 	set_config_with_override STRING SYSTEMMAP_FILENAME                    CMD_SYSTEMMAP_FILENAME                    "${DEFAULT_SYSTEMMAP_FILENAME}"