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Subject[PATCH v3] scripts/package: snap-pkg target
Date
Following in footsteps of other targets like 'deb-pkg, 'rpm-pkg' and 'tar-pkg',
this patch adds a 'snap-pkg' target for the creation of a Linux kernel snap
package using the kbuild infrastructure.

A snap, in its general form, is a self contained, sandboxed, universal package
and it is intended to work across multiple distributions and/or devices. A snap
package is distributed as a single compressed squashfs filesystem.

A kernel snap is a snap package carrying the Linux kernel, kernel modules,
accessory files (DTBs, System.map, etc) and a manifesto file. The purpose of a
kernel snap is to carry the Linux kernel during the creation of a system image,
eg. Ubuntu Core, and its subsequent upgrades.

For more information on snap packages: https://snapcraft.io/docs/

Signed-off-by: Paolo Pisati <paolo.pisati@canonical.com>
---
Changes since v2:
- use a tarball to instead of cloning the src tree via git
- set 'kernel-with-firmware: false' to accomodate for
'firmware_install' removal

Changes since v1:
- slightly improve the messaging
---
.gitignore | 5 +++++
scripts/package/Makefile | 16 ++++++++++++++++
scripts/package/snapcraft.template | 14 ++++++++++++++
3 files changed, 35 insertions(+)
create mode 100644 scripts/package/snapcraft.template

diff --git a/.gitignore b/.gitignore
index f6050b8..705e099 100644
--- a/.gitignore
+++ b/.gitignore
@@ -66,6 +66,11 @@ modules.builtin
/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 9ed96aef..5996300 100644
--- a/scripts/package/Makefile
+++ b/scripts/package/Makefile
@@ -95,6 +95,21 @@ bindeb-pkg: FORCE

clean-dirs += $(objtree)/debian/

+# snap-pkg
+# ---------------------------------------------------------------------------
+snap-pkg: FORCE
+ rm -rf $(objtree)/snap
+ mkdir $(objtree)/snap
+ $(MAKE) clean
+ $(call cmd,src_tar,$(KERNELPATH))
+ sed "s@KERNELRELEASE@$(KERNELRELEASE)@; \
+ s@SRCTREE@$(shell realpath $(KERNELPATH).tar.gz)@" \
+ $(srctree)/scripts/package/snapcraft.template > \
+ $(objtree)/snap/snapcraft.yaml
+ cd $(objtree)/snap && \
+ snapcraft --target-arch=$(UTS_MACHINE)
+
+clean-dirs += $(objtree)/snap/

# tarball targets
# ---------------------------------------------------------------------------
@@ -139,6 +154,7 @@ help: FORCE
@echo ' binrpm-pkg - Build only the binary kernel RPM package'
@echo ' deb-pkg - Build both source and binary deb kernel packages'
@echo ' bindeb-pkg - Build only the binary kernel deb package'
+ @echo ' snap-pkg - Build only the binary kernel snap package (will connect to external hosts)'
@echo ' tar-pkg - Build the kernel as an uncompressed tarball'
@echo ' targz-pkg - Build the kernel as a gzip compressed tarball'
@echo ' tarbz2-pkg - Build the kernel as a bzip2 compressed tarball'
diff --git a/scripts/package/snapcraft.template b/scripts/package/snapcraft.template
new file mode 100644
index 0000000..626d278e
--- /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: tar
+ kernel-with-firmware: false
--
2.7.4
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