[PATCH] make snap-pkg support

[Paolo Pisati]

BugLink: http://bugs.launchpad.net/bugs/1700747

This patch integrates snapcraft in the kbuild environment of the Linux kernel.

To use it:

make defconfig
make snap-pkg

or in case of cross-compilation (e.g. arm):

export ARCH=arm; export CROSS_COMPILE=arm-linux-gnueabihf-
make defconfig
make snap-pkg

The resulting kernel snap will be generated in $(objtree)/snap

Signed-off-by: Paolo Pisati <paolo.pisati at canonical.com>
---
 .gitignore                         |  5 +++++
 scripts/package/Makefile           | 13 +++++++++++++
 scripts/package/snapcraft.template | 14 ++++++++++++++
 3 files changed, 32 insertions(+)
 create mode 100644 scripts/package/snapcraft.template

diff --git a/.gitignore b/.gitignore
index e78c8c2..efdd5ab 100644
--- a/.gitignore
+++ b/.gitignore
@@ -57,6 +57,11 @@ Module.symvers
 #/debian/
 
 #
+# Snap directory (make snap-pkg)
+#
+/snap/
+
+#
 # tar directory (make tar*-pkg)
 #
 /tar-install/
diff --git a/scripts/package/Makefile b/scripts/package/Makefile
index 493e226..3b08e1b 100644
--- a/scripts/package/Makefile
+++ b/scripts/package/Makefile
@@ -99,6 +99,19 @@ bindeb-pkg: FORCE
 
 clean-dirs += $(objtree)/debian/
 
+# snap-pkg
+# ---------------------------------------------------------------------------
+snap-pkg: FORCE
+	rm -rf $(objtree)/snap
+	mkdir $(objtree)/snap
+	sed "s at KERNELRELEASE@$(KERNELRELEASE)@; \
+		s at SRCTREE@$(shell realpath $(srctree))@" \
+		$(srctree)/scripts/package/snapcraft.template > \
+		$(objtree)/snap/snapcraft.yaml
+	cd $(objtree)/snap && \
+	snapcraft --target-arch=$(UTS_MACHINE)
+
+clean-dirs += $(objtree)/snap/
 
 # tarball targets
 # ---------------------------------------------------------------------------
diff --git a/scripts/package/snapcraft.template b/scripts/package/snapcraft.template
new file mode 100644
index 0000000..2e7ffc8
--- /dev/null
+++ b/scripts/package/snapcraft.template
@@ -0,0 +1,14 @@
+name: kernel
+version: KERNELRELEASE
+summary: Linux kernel
+description: The upstream Linux kernel
+grade: stable
+confinement: strict
+type: kernel
+
+parts:
+  kernel:
+    plugin: kernel
+    source: SRCTREE
+    source-type: git
+    kconfigfile: SRCTREE/.config
-- 
2.7.4