fsl-kernel-localversion: Easy LOCALVERSION handling

This class allow for easy extending of kernel recipes to easy the
LOCALVERSION handling, allowing to reuse of code between different
kernel recipes

The following options are supported:

 SCMVERSION        Puts the Git hash in kernel local version
 LOCALVERSION      Value used in LOCALVERSION (default to '+fslc')

This about avoid code duplication among Layerscape and i.MX.

Change-Id: I3999dbdc2cb761063fe5f83dea65ddb14adec80c
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>

1 files changed, 39 insertions, 0 deletions

diff --git a/classes/fsl-kernel-localversion.bbclass b/classes/fsl-kernel-localversion.bbclass
new file mode 100644
index 0000000..bb4bdf5
--- /dev/null
+++ b/classes/fsl-kernel-localversion.bbclass
@@ -0,0 +1,39 @@
+# Freescale Kernel LOCALVERSION extension
+#
+# This allow to easy reuse of code between different kernel recipes
+#
+# The following options are supported:
+#
+#  SCMVERSION        Puts the Git hash in kernel local version
+#  LOCALVERSION      Value used in LOCALVERSION (default to '+fslc')
+#
+# Copyright 2014 (C) O.S. Systems Software LTDA.
+
+SCMVERSION ??= "y"
+LOCALVERSION ??= "+fslc"
+
+kernel_conf_variable() {
+        CONF_SED_SCRIPT="$CONF_SED_SCRIPT /CONFIG_$1[ =]/d;"
+        if test "$2" = "n"
+        then
+                echo "# CONFIG_$1 is not set" >> ${S}/.config
+        else
+                echo "CONFIG_$1=$2" >> ${S}/.config
+        fi
+}
+
+do_configure_prepend() {
+        echo "" > ${S}/.config
+        CONF_SED_SCRIPT=""
+
+        kernel_conf_variable LOCALVERSION "\"${LOCALVERSION}\""
+        kernel_conf_variable LOCALVERSION_AUTO y
+
+        sed -e "${CONF_SED_SCRIPT}" < '${WORKDIR}/defconfig' >> '${S}/.config'
+
+        if [ "${SCMVERSION}" = "y" ]; then
+                # Add GIT revision to the local version
+                head=`git rev-parse --verify --short HEAD 2> /dev/null`
+                printf "%s%s" +g $head > ${S}/.scmversion
+        fi
+}