Support --kernel-config=/proc/config.gz (bug #421027)

ChangeLog

@@ -5,6 +5,10 @@
 # Distributed under the GPL v2
 # $Id$
 
+  01 Jul 2012; Sebastian Pipping <sping@gentoo.org> gen_configkernel.sh,
+  gen_package.sh:
+  Support --kernel-config=/proc/config.gz (bug #421027)
+
   11 Jun 2012; Sebastian Pipping <sping@gentoo.org> genkernel:
   Bump version to 3.4.36
 

gen_configkernel.sh

@@ -56,7 +56,13 @@ config_kernel() {
 	# or we might remove configurations someone is trying to test.
 	if isTrue "${MRPROPER}" || [ ! -f "${KERNEL_DIR}/.config" ]
 	then
-		cp "${KERNEL_CONFIG}" "${KERNEL_DIR}/.config" || gen_die 'Could not copy configuration file!'
+		local message='Could not copy configuration file!'
+		if [[ "$(file --brief --mime-type "${KERNEL_CONFIG}")" == application/x-gzip ]]; then
+			# Support --kernel-config=/proc/config.gz, mainly
+			zcat "${KERNEL_CONFIG}" > "${KERNEL_DIR}/.config" || gen_die "${message}"
+		else
+			cp "${KERNEL_CONFIG}" "${KERNEL_DIR}/.config" || gen_die "${message}"
+		fi
 	fi
 
 	if isTrue "${OLDCONFIG}"

gen_package.sh

@@ -78,7 +78,13 @@ gen_kerncache()
 	cd "${KERNEL_DIR}"
 	cp "${tmp_kernel_binary}" "${TEMP}/kerncache/kernel-${ARCH}-${KV}" || gen_die 'Could not the copy kernel for the kernel package!'
 	cp "${KERNEL_DIR}/.config" "${TEMP}/kerncache/config-${ARCH}-${KV}"
+
+	if [[ "$(file --brief --mime-type "${KERNEL_CONFIG}")" == application/x-gzip ]]; then
+		# Support --kernel-config=/proc/config.gz, mainly
+		zcat "${KERNEL_CONFIG}" > "${TEMP}/kerncache/config-${ARCH}-${KV}.orig"
+	else
 		cp "${KERNEL_CONFIG}" "${TEMP}/kerncache/config-${ARCH}-${KV}.orig"
+	fi
 	cp "${KERNEL_DIR}/System.map" "${TEMP}/kerncache/System.map-${ARCH}-${KV}"
 	if isTrue "${GENZIMAGE}"
 	then
@@ -180,7 +186,16 @@ gen_kerncache_is_valid()
 				else
 					test1=$(grep -v "^#" ${TEMP}/config-${ARCH}-${KV} | md5sum | cut -d " " -f 1)
 				fi
-				test2=$(grep -v "^#" ${KERNEL_CONFIG} | md5sum | cut -d " " -f 1)
+
+				if [[ "$(file --brief --mime-type "${KERNEL_CONFIG}")" == application/x-gzip ]]; then
+					# Support --kernel-config=/proc/config.gz, mainly
+					local CONFGREP=zgrep
+				else
+					local CONFGREP=grep
+				fi
+				test2=$("${CONFGREP}" -v "^#" ${KERNEL_CONFIG} | md5sum | cut -d " " -f 1)
+
+
 				if [ "${test1}" == "${test2}" ]
 				then
 					echo