build: Rework patch mechanism for Fuel submodules

While refactoring the patching mechanism, take care of:
- Sync submodule handling with Fuel@OPFNV;
- build: Investigate/prepare for moving patches to Fuel@OPNFV;
- build: Investigate divergent fuel-mirror;
- ISO build: cacheid for Fuel comps should not depend on
  Armband git commit;

CHANGE:
 Rename/shuffle patches while grouping them in "features",
 preparing for upstreaming them to Fuel@OPNFV and beyond.

CHANGE:
 Allow linking patches for better representing the dependency
 between one patch and different features.
 e.g. 0001-Add-arch-to-nailgun-release-and-target-image.patch:
   - part of `multiarch-fuel`, because it extends Fuel;
   - part of `direct-kernel-boot`, as arch is required for that;
   - part of `cross-bootstrap`, target image is arch-dependent;
 NOTE: Patch links are not staged to Fuel@OPNFV, they only serve
 as markers that a specific patch is part of a feature.

CHANGE:
 Kill all Fuel component submodules, now handled in Fuel@OPNFV:
  - fuel-agent
  - fuel-astute
  - fuel-library
  - fuel-mirror
  - fuel-nailgun-agent
  - fuel-web

CHANGE:
 Move armband-fuel-config.mk to armband git root.

FIXME: m1.micro-Increase-profile-RAM-size-to-128MB.patch is NOT
 part of `cross-bootstrap` feature, but patch context says so ...

FIXME: 0001-Add-arm64-deb-repositories-setup.patch is broken at
 `make patches-export` by removing spaces at EOL.

v2 -> v3:
 * Phony patch support (links to show a patch belongs to a feature);
 * Updated README.md
v3 -> v7:
 * Re-export Fuel submodules & plugins patches (update patch context);
 * Update Cavium mail addresses (s/caviumnetworks.com/cavium.com/);
 * Ignore submodule changes;
 * Add armband git repo info to gitinfo_fuel.txt at build time;

Implements: ARMBAND-136
Closes-bug: ARMBAND-95
Closes-bug: ARMBAND-93
Closes-bug: ARMBAND-92

Change-Id: I1a236d9f43b2e6dca22055911f696b43c22b5973
Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>

1 files changed, 43 insertions, 0 deletions

diff --git a/patches/fuel-astute/multiarch-efi/0001-Erase-EFI-boot-entry-on-EFI-systems.patch b/patches/fuel-astute/multiarch-efi/0001-Erase-EFI-boot-entry-on-EFI-systems.patch
new file mode 100644
index 00000000..fa8a83a7
--- /dev/null
+++ b/patches/fuel-astute/multiarch-efi/0001-Erase-EFI-boot-entry-on-EFI-systems.patch
@@ -0,0 +1,43 @@
+From: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
+Date: Mon, 18 Jul 2016 16:02:20 +0200
+Subject: [PATCH] Erase EFI boot entry on EFI systems.
+
+On EFI-enabled systemd, grub-install from grub-efi-* package
+installs a boot entry named "ubuntu".
+
+Since this boot entry is saved in board flash memory, erasing
+the MBR bootloader code and/or partition signature will not
+clear the ubuntu boot entry, leaving it pointing to a loader
+on the ESP (EFI System Partition) that will try to load the
+kernel/initrd from an erased partition.
+
+In Fuel 8.0, the whole disk was erased, so the ubuntu EFI boot
+entry was skipped due to missing ESP, while for Fuel 9.0 and
+above we have to explicitly remove it to keep the system in a
+sane state.
+
+Note: efibootmgr is installed automatically on EFI systems
+as a dependency of grub-efi-*.
+
+Closes: ARMBAND-47
+
+Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
+---
+ mcagents/erase_node.rb | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+diff --git a/mcagents/erase_node.rb b/mcagents/erase_node.rb
+index 3eb98e8..3bac36f 100644
+--- a/mcagents/erase_node.rb
++++ b/mcagents/erase_node.rb
+@@ -112,6 +112,10 @@ module MCollective
+         File.open('/proc/sys/kernel/panic','w') {|file| file.write("10\n")}
+
+         begin
++          # clear out EFI boot entry on EFI-enabled systems
++          system("(which efibootmgr > /dev/null 2>&1 && efibootmgr | "\
++                 "grep -oP '(?<=Boot)[0-9]+(?=.*ubuntu)' | "\
++                 "xargs -I{} efibootmgr --delete-bootnum --bootnum {}) || true")
+           get_devices(type='all').each do |dev|
+             debug_msg("erasing bootstrap code area in MBR of #{dev[:name]}")
+             # clear out the boot code in MBR