linux-yocto: streamline support for multiple upstream repo types

In order to support repositories of various types (with or without
meta data, branched, pristine, custom, etc) information about the
type of processing that is required was passed to the processing
phases via variables.

The combination of variables involved in coordinating the processing
creates a learning curve and overly complicates recipe extensions.

With minor tweaks to the kern-tools, adding flexibility and keying
off the existence of the meta branch it is possible to remove all
of the variables that were added to support different repository
types.

Signed-off-by: Bruce Ashfield <bruce.ashfield@windriver.com>

8 files changed, 86 insertions, 68 deletions

diff --git a/meta/classes/kernel-yocto.bbclass b/meta/classes/kernel-yocto.bbclass
index c995a2ef5..c6425b2b6 100644
--- a/meta/classes/kernel-yocto.bbclass
+++ b/meta/classes/kernel-yocto.bbclass
@@ -45,9 +45,6 @@ def find_urls(d):
 
 do_patch() {
 	cd ${S}
-	if [ -f ${WORKDIR}/defconfig ]; then
-	    defconfig=${WORKDIR}/defconfig
-	fi
 
 	# if kernel tools are available in-tree, they are preferred
 	# and are placed on the path before any external tools. Unless
@@ -59,16 +56,13 @@ do_patch() {
 	fi
 
 	kbranch=${KBRANCH}
-	if [ -n "${YOCTO_KERNEL_EXTERNAL_BRANCH}" ]; then
-           # switch from a generic to a specific branch
-           kbranch=${YOCTO_KERNEL_EXTERNAL_BRANCH}
-	fi
 
-	# simply ensures that a branch of the right name has been created
-	if [ -n "${YOCTO_KERNEL_META_DATA}" ]; then
+	# if we have a defined/set meta branch we should not be generating
+	# any meta data. The passed branch has what we need.
+	if [ -n "${KMETA}" ]; then
 		createme_flags="--disable-meta-gen"
 	fi
-	createme ${createme_flags} ${ARCH} ${kbranch} ${defconfig}
+	createme ${createme_flags} ${ARCH} ${kbranch}
 	if [ $? -ne 0 ]; then
 		echo "ERROR. Could not create ${kbranch}"
 		exit 1
@@ -95,7 +89,7 @@ do_patch() {
 	fi
 
 	# executes and modifies the source tree as required
-	patchme ${kbranch}
+	patchme ${KMACHINE}
 	if [ $? -ne 0 ]; then
 		echo "ERROR. Could not modify ${kbranch}"
 		exit 1
@@ -122,7 +116,7 @@ do_kernel_checkout() {
 		mv ${WORKDIR}/git/.git ${S}
 		rm -rf ${WORKDIR}/git/
 		cd ${S}
-		if [ -n "${YOCTO_KERNEL_META_DATA}" ] && [ -n "${KMETA}" ]; then
+		if [ -n "${KMETA}" ]; then
 			git branch -a | grep -q ${KMETA}
 			if [ $? -ne 0 ]; then
 				echo "ERROR. The branch '${KMETA}' is required and was not"
@@ -131,15 +125,6 @@ do_kernel_checkout() {
 				exit 1
 			fi
 		fi
-	 	if [ -z "${YOCTO_KERNEL_EXTERNAL_BRANCH}" ] && [ -n "${KBRANCH}" ] ; then
-			git branch -a | grep -q ${KBRANCH}
-			if [ $? -ne 0 ]; then
-				echo "ERROR. The branch '${KBRANCH}' is required and was not"
-				echo "found. Ensure that the SRC_URI points to a valid linux-yocto"
-				echo "kernel repository"
-				exit 1
-			fi
-		fi
 	fi
 	if [ -d "${WORKDIR}/git/" ] && [ ! -d "${WORKDIR}/git/.git" ]; then
 		# we build out of {S}, so ensure that ${S} is clean and present
@@ -192,7 +177,7 @@ do_kernel_configme() {
 
 	cd ${S}
 	PATH=${PATH}:${S}/scripts/util
-	configme ${configmeflags} --reconfig --output ${B} ${KBRANCH} ${KMACHINE}
+	configme ${configmeflags} --reconfig --output ${B} ${LINUX_KERNEL_TYPE} ${KMACHINE}
 	if [ $? -ne 0 ]; then
 		echo "ERROR. Could not configure ${KMACHINE}-${LINUX_KERNEL_TYPE}"
 		exit 1
@@ -221,51 +206,71 @@ python do_kernel_configcheck() {
 do_validate_branches() {
 	cd ${S}
 
-	# nothing to do if bootstrapping
- 	if [ -n "${YOCTO_KERNEL_EXTERNAL_BRANCH}" ]; then
- 	 	return
- 	fi
-
-	# nothing to do if SRCREV is AUTOREV
+	set +e
+	# if SRCREV is AUTOREV it shows up as AUTOINC there's nothing to
+	# check and we can exit early
 	if [ "${SRCREV_machine}" = "AUTOINC" ]; then
-		# restore the branch for builds
-		git checkout -f ${KBRANCH}
+		return
+	fi
+
+	# if the branches do not exist, then there's nothing to check either
+	git show-ref --quiet --verify -- "refs/heads/${KBRANCH}"
+	if [ $? -eq 1 ]; then
 		return
 	fi
 
  	branch_head=`git show-ref -s --heads ${KBRANCH}`
- 	meta_head=`git show-ref -s --heads ${KMETA}`
- 	target_branch_head="${SRCREV_machine}"
- 	target_meta_head="${SRCREV_meta}"
+	if [ -z "${SRCREV_machine}" ]; then
+		target_branch_head="${SRCREV}"
+	else
+	 	target_branch_head="${SRCREV_machine}"
+	fi
+
+	if [ "${target_branch_head}" = "AUTOINC" ]; then
+		return
+	fi
 
+	# We have SRCREVs and we have branches so validation can continue!
 	current=`git branch |grep \*|sed 's/^\* //'`
-	if [ -n "$target_branch_head" ] && [ "$branch_head" != "$target_branch_head" ]; then
-		if [ -n "${KERNEL_REVISION_CHECKING}" ]; then
-			ref=`git show ${target_meta_head} 2>&1 | head -n1 || true`
-			if [ "$ref" = "fatal: bad object ${target_meta_head}" ]; then
-				echo "ERROR ${target_branch_head} is not a valid commit ID."
-				echo "The kernel source tree may be out of sync"
-				exit 1
-			else
-				echo "Forcing branch $current to ${target_branch_head}"
-				git branch -m $current $current-orig
-				git checkout -b $current ${target_branch_head}
-			fi
+	if [ -n "$target_branch_head" ] && [ "$branch_head" != "$target_branch_head" ] &&
+           [ "$target_branch_head" != "AUTOINC" ]; then
+		ref=`git show ${target_branch_head} 2>&1 | head -n1 || true`
+		if [ "$ref" = "fatal: bad object ${target_meta_head}" ]; then
+			echo "ERROR ${target_branch_head} is not a valid commit ID."
+			echo "The kernel source tree may be out of sync"
+			exit 1
+		else
+			echo "Forcing branch $current to ${target_branch_head}"
+			git branch -m $current $current-orig
+			git checkout -b $current ${target_branch_head}
 		fi
 	fi
 
+ 	meta_head=`git show-ref -s --heads ${KMETA}`
+ 	target_meta_head="${SRCREV_meta}"
+	git show-ref --quiet --verify -- "refs/heads/${KMETA}"
+	if [ $? -eq 1 ]; then
+		return
+	fi
+
+	if [ "${target_meta_head}" = "AUTOINC" ]; then
+		return
+	fi
+
 	if [ "$meta_head" != "$target_meta_head" ]; then
-		if [ -n "${KERNEL_REVISION_CHECKING}" ]; then
-			ref=`git show ${target_meta_head} 2>&1 | head -n1 || true`
-			if [ "$ref" = "fatal: bad object ${target_meta_head}" ]; then
-				echo "ERROR ${target_meta_head} is not a valid commit ID"
-				echo "The kernel source tree may be out of sync"
+		ref=`git show ${target_meta_head} 2>&1 | head -n1 || true`
+		if [ "$ref" = "fatal: bad object ${target_meta_head}" ]; then
+			echo "ERROR ${target_meta_head} is not a valid commit ID"
+			echo "The kernel source tree may be out of sync"
+			exit 1
+		else
+			echo "Forcing branch meta to ${target_meta_head}"
+			git branch -m ${KMETA} ${KMETA}-orig
+			git checkout -b ${KMETA} ${target_meta_head}
+			if [ $? -ne 0 ];then
+				echo "ERROR: could not checkout meta branch from known hash ${target_meta_head}"
 				exit 1
-			else
-				echo "Forcing branch meta to ${target_meta_head}"
-				git branch -m ${KMETA} ${KMETA}-orig
-				git checkout -b ${KMETA} ${target_meta_head}
-			fi	   
+			fi
 		fi
 	fi
 
diff --git a/meta/recipes-kernel/kern-tools/kern-tools-native_git.bb b/meta/recipes-kernel/kern-tools/kern-tools-native_git.bb
index 754ebe5fb..1af22f634 100644
--- a/meta/recipes-kernel/kern-tools/kern-tools-native_git.bb
+++ b/meta/recipes-kernel/kern-tools/kern-tools-native_git.bb
@@ -4,7 +4,7 @@ LIC_FILES_CHKSUM = "file://git/tools/kgit;beginline=5;endline=9;md5=e2bf4415f3d8
 
 DEPENDS = "git-native guilt-native"
 
-SRCREV = "2bbbaaa00cc70887d6d6f745b9425890d522d240"
+SRCREV = "369e67046a1b72b6447c208babd4d2065265a95e"
 PR = "r12"
 PV = "0.1+git${SRCPV}"
 
diff --git a/meta/recipes-kernel/linux/linux-yocto-rt_3.0.bb b/meta/recipes-kernel/linux/linux-yocto-rt_3.0.bb
index 36dcb6e67..14af91dc3 100644
--- a/meta/recipes-kernel/linux/linux-yocto-rt_3.0.bb
+++ b/meta/recipes-kernel/linux/linux-yocto-rt_3.0.bb
@@ -13,6 +13,7 @@ KBRANCH_qemuppc = "yocto/standard/preempt-rt/qemu-ppc32"
 
 LINUX_VERSION ?= "3.0.24"
 LINUX_KERNEL_TYPE = "preempt-rt"
+KMETA = "meta"
 
 SRCREV_machine ?= "cf280f1dc5877d4ca43d21307222326efa68bb27"
 SRCREV_machine_qemuppc ?= "afaa5baa6a9ca9c8a03a9a3eee2ba9fba089f416"
diff --git a/meta/recipes-kernel/linux/linux-yocto-rt_3.2.bb b/meta/recipes-kernel/linux/linux-yocto-rt_3.2.bb
index 7e01efbc9..8ec366cee 100644
--- a/meta/recipes-kernel/linux/linux-yocto-rt_3.2.bb
+++ b/meta/recipes-kernel/linux/linux-yocto-rt_3.2.bb
@@ -14,6 +14,8 @@ KBRANCH_qemuppc = "standard/preempt-rt/qemu-ppc32"
 LINUX_VERSION ?= "3.2.11"
 LINUX_KERNEL_TYPE = "preempt-rt"
 
+KMETA = "meta"
+
 SRCREV_machine ?= "3ebf4d172cf4a41d2abf09e4036f0850e08064e7"
 SRCREV_machine_qemuppc ?= "7cebfe717987f4ffa9ae90558c28f45049847c1c"
 SRCREV_meta ?= "6b3d4e09aa2531e9649f3f03827b7efbccfcec03"
diff --git a/meta/recipes-kernel/linux/linux-yocto.inc b/meta/recipes-kernel/linux/linux-yocto.inc
index 2b61b7e2c..0912beef5 100644
--- a/meta/recipes-kernel/linux/linux-yocto.inc
+++ b/meta/recipes-kernel/linux/linux-yocto.inc
@@ -9,15 +9,14 @@ LIC_FILES_CHKSUM = "file://COPYING;md5=d7810fab7487fb0aad327b76f1be7cd7"
 # and it can be specific to the machine or shared
 # KMACHINE = "UNDEFINED"
 
-# Set this to 'preempt_rt' in the local.conf if you want a real time kernel
 LINUX_KERNEL_TYPE ?= "standard"
 
-KMETA ?= "meta"
+# KMETA ?= ""
+KBRANCH ?= "master"
+KMACHINE ?= "${MACHINE}"
 SRCREV_FORMAT ?= "meta_machine" 
 
 LINUX_VERSION_EXTENSION ?= "-yocto-${LINUX_KERNEL_TYPE}"
-KERNEL_REVISION_CHECKING ?= "t"
-YOCTO_KERNEL_META_DATA ?= "t"
 
 do_patch[depends] = "kern-tools-native:do_populate_sysroot"
 
diff --git a/meta/recipes-kernel/linux/linux-yocto_2.6.37.bb b/meta/recipes-kernel/linux/linux-yocto_2.6.37.bb
index d3da75cfc..3968c62f3 100644
--- a/meta/recipes-kernel/linux/linux-yocto_2.6.37.bb
+++ b/meta/recipes-kernel/linux/linux-yocto_2.6.37.bb
@@ -10,6 +10,8 @@ KMACHINE_qemuarm  = "yocto/standard/arm-versatile-926ejs"
 
 KBRANCH = "${KMACHINE}"
 
+KMETA = "meta"
+
 LINUX_VERSION ?= "2.6.37"
 
 SRCREV_machine_qemuarm = "b3e53a090eaa23aa82e64fa0a563a93a2b4dbb5d"
diff --git a/meta/recipes-kernel/linux/linux-yocto_3.0.bb b/meta/recipes-kernel/linux/linux-yocto_3.0.bb
index 074b1ede9..82a722425 100644
--- a/meta/recipes-kernel/linux/linux-yocto_3.0.bb
+++ b/meta/recipes-kernel/linux/linux-yocto_3.0.bb
@@ -1,14 +1,21 @@
 inherit kernel
 require recipes-kernel/linux/linux-yocto.inc
 
-KMACHINE = "yocto/standard/base"
-KMACHINE_qemux86  = "yocto/standard/common-pc/base"
-KMACHINE_qemux86-64  = "yocto/standard/common-pc-64/base"
-KMACHINE_qemuppc  = "yocto/standard/qemu-ppc32"
-KMACHINE_qemumips = "yocto/standard/mti-malta32-be"
-KMACHINE_qemuarm  = "yocto/standard/arm-versatile-926ejs"
-
-KBRANCH = "${KMACHINE}"
+KBRANCH = "yocto/standard/base"
+KBRANCH_qemux86  = "yocto/standard/common-pc/base"
+KBRANCH_qemux86-64  = "yocto/standard/common-pc-64/base"
+KBRANCH_qemuppc  = "yocto/standard/qemu-ppc32"
+KBRANCH_qemumips = "yocto/standard/mti-malta32-be"
+KBRANCH_qemuarm  = "yocto/standard/arm-versatile-926ejs"
+
+# Temporary until 3.0 kernel tree is updated with machine mappings
+KMACHINE_qemux86 = "common-pc"
+KMACHINE_qemux86-64 = "common-pc-64"
+KMACHINE_qemuppc = "qemu-ppc32"
+KMACHINE_qemumips = "mti-malta32-be"
+KMACHINE_qemuarm = "arm-versatile-926ejs"
+
+KMETA = "meta"
 
 LINUX_VERSION ?= "3.0.24"
 
diff --git a/meta/recipes-kernel/linux/linux-yocto_3.2.bb b/meta/recipes-kernel/linux/linux-yocto_3.2.bb
index 51119bb20..71290bddd 100644
--- a/meta/recipes-kernel/linux/linux-yocto_3.2.bb
+++ b/meta/recipes-kernel/linux/linux-yocto_3.2.bb
@@ -28,6 +28,8 @@ SRCREV_meta ?= "6b3d4e09aa2531e9649f3f03827b7efbccfcec03"
 PR = "r1"
 PV = "${LINUX_VERSION}+git${SRCPV}"
 
+KMETA = "meta"
+
 SRC_URI = "git://git.yoctoproject.org/linux-yocto-3.2;protocol=git;bareclone=1;branch=${KBRANCH},meta;name=machine,meta"
 
 COMPATIBLE_MACHINE = "(qemuarm|qemux86|qemuppc|qemumips|qemux86-64)"