package/swupdate: new package

swupdate provides a reliable way to update the software on an embedded system.

Note that swupdates has a reworked Kbuild/Kconfig system. It has now support
for the 'option' and 'env' symbols as well for the 'savedefconfig' target.
This makes dependency handling much easier. We're now able to pass which
dependencies are available through the environment, as suggested by Arnout
Vandecappelle [1].

In previous version of this patch we had a configuration setting where all
package dependencies except Lua were selected by default. This has changed with
v7 as we are now able to pass dependencies to the swupdate build system through
the environment. For useful operation swupdate requires a parser which depends
by default on libconfig, but can be replaced by a json-c or Lua parser.

To provide a reasonable firmware update system we enable the embedded webserver
based on mongoose (also see notes about mongoose below), a parser as stated
above and a handler for raw NAND or NOR flash.

The user can modify this configuration by selecting the appropriate dependencies
before running `make swupdate-menuconfig`. The help text contains information
about which packages may be of interest for the user.

The embedded web server requires a website for proper operation. We install the
included website by default, however the user may choose to install a custom
website on the post-build scripts.

Note, swupdate includes some old versions of mongoose and lsqlite3:
  - mongoose is version 3.8 from year 2013
  - lsqlite3 is version 0.8 from year 2011

Currently, swupdate does not provide a way to replace these with external
packages.

This patch is based on a WIP version submitted by Romain Naour, commented by
Arnout Vandecappelle [2].

[1]
http://lists.busybox.net/pipermail/buildroot/2015-March/122981.html

[2]
https://patchwork.ozlabs.org/patch/401270/

Signed-off-by: Jörg Krause <joerg.krause@embedded.rocks>
Cc: Romain Naour <romain.naour@openwide.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Arnout Vandecappelle <arnout@mind.be>
Cc: Yann E. MORIN <yann.morin.1998@free.fr>
Tested-by: Mike Williams <mike@mikebwilliams.com>
Reviewed-by: Romain Naour <romain.naour@openwide.fr>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

3 files changed, 223 insertions, 0 deletions

diff --git a/package/swupdate/Config.in b/package/swupdate/Config.in
new file mode 100644
index 0000000000..4625393663
--- /dev/null
+++ b/package/swupdate/Config.in
@@ -0,0 +1,56 @@
+config BR2_PACKAGE_SWUPDATE
+	bool "swupdate"
+	depends on BR2_TOOLCHAIN_HAS_THREADS
+	depends on BR2_USE_MMU # fork()
+	# swupdate requires a parser and uses libconfig as default
+	select BR2_PACKAGE_LIBCONFIG if !BR2_PACKAGE_JSON_C && !BR2_PACKAGE_LUA_5_2
+	help
+	  swupdate provides a reliable way to update the software on an
+	  embedded system.
+
+	  swupdate is highly configurable to fit the targets requirements and
+	  to minimize the footprint. The provided default configuration file
+	  BR2_PACKAGE_SWUPDATE_CONFIG will enable swupdate with an embedded
+	  webserver, a parser and a handler for raw NAND or NOR flash.
+
+	  The default configuration file builds a reasonable firmware update
+	  system with minimal external dependencies in my mind. If you like to
+	  use your own modified configuration, you have to select the
+	  necessary packages manually:
+
+	  * Select BR2_PACKAGE_LUA_5_2 if you want to have Lua support.
+	  * Select BR2_LIBCURL if you want to use the download feature.
+	  * Select BR2_PACKAGE_OPENSSL is you want to add encryptions support
+	    to the webserver.
+	  * Select BR2_PACKAGE_MTD if you want to use swupdate with UBI
+	    partitions.
+	  * Select BR2_PACKAGE_ZLIB if you want to deal with zip compressed
+	    archives.
+
+	  https://sbabic.github.io/swupdate
+
+if BR2_PACKAGE_SWUPDATE
+
+config BR2_PACKAGE_SWUPDATE_CONFIG
+	string "swupdate configuration file"
+	default "package/swupdate/swupdate.config"
+	help
+	  Path to the swupdate configuration file.
+
+	  I you wish to use your own modified swupdate configuration file
+	  specify the config file location with this option.
+
+config BR2_PACKAGE_SWUPDATE_INSTALL_WEBSITE
+	bool "install default website"
+	default y
+	help
+	  Install the provided website to /var/www/swupdate.
+
+	  This is necessary if you want to run swupdate with the embedded
+	  webserver and do not provide an own website to be installed to
+	  /var/www/swupdate.
+endif
+
+comment "swupdate needs a toolchain w/ threads"
+	depends on BR2_USE_MMU
+	depends on !BR2_TOOLCHAIN_HAS_THREADS
diff --git a/package/swupdate/swupdate.config b/package/swupdate/swupdate.config
new file mode 100644
index 0000000000..bac7a58caa
--- /dev/null
+++ b/package/swupdate/swupdate.config
@@ -0,0 +1,61 @@
+#
+# Automatically generated file; DO NOT EDIT.
+# Swupdate Configuration
+#
+CONFIG_HAVE_DOT_CONFIG=y
+
+#
+# Swupdate Settings
+#
+
+#
+# General Configuration
+#
+CONFIG_SCRIPTS=y
+# CONFIG_HW_COMPATIBILITY is not set
+# CONFIG_FEATURE_SYSLOG is not set
+
+#
+# Build Options
+#
+# CONFIG_STATIC is not set
+CONFIG_CROSS_COMPILE=""
+CONFIG_SYSROOT=""
+CONFIG_EXTRA_CFLAGS=""
+CONFIG_EXTRA_LDFLAGS=""
+CONFIG_EXTRA_LDLIBS=""
+
+#
+# Debugging Options
+#
+# CONFIG_DEBUG is not set
+# CONFIG_WERROR is not set
+# CONFIG_NOCLEANUP is not set
+CONFIG_WEBSERVER=y
+
+#
+# Webserver Features
+#
+CONFIG_MONGOOSE=y
+
+#
+# Mongoose Feature
+#
+CONFIG_MONGOOSEIPV6=y
+
+#
+# Archival Features
+#
+CONFIG_CPIO=y
+
+#
+# Parser Features
+#
+# CONFIG_SETSWDESCRIPTION is not set
+
+#
+# Image Handlers
+#
+CONFIG_RAW=y
+# CONFIG_SHELLSCRIPTHANDLER is not set
+# CONFIG_UBOOT is not set
diff --git a/package/swupdate/swupdate.mk b/package/swupdate/swupdate.mk
new file mode 100644
index 0000000000..86bbf14314
--- /dev/null
+++ b/package/swupdate/swupdate.mk
@@ -0,0 +1,106 @@
+################################################################################
+#
+# swupdate
+#
+################################################################################
+
+SWUPDATE_VERSION = 2015.07
+SWUPDATE_SITE = $(call github,sbabic,swupdate,$(SWUPDATE_VERSION))
+SWUPDATE_LICENSE = GPLv2+, MIT, Public Domain
+SWUPDATE_LICENSE_FILES = COPYING
+
+# swupdate bundles its own version of mongoose (version 3.8) and
+# lsqlite3 (version 0.8)
+
+ifeq ($(BR2_PACKAGE_JSON_C),y)
+SWUPDATE_DEPENDENCIES += json-c
+SWUPDATE_MAKE_ENV += HAVE_JSON_C=y
+else
+SWUPDATE_MAKE_ENV += HAVE_JSON_C=n
+endif
+
+ifeq ($(BR2_PACKAGE_LIBCONFIG),y)
+SWUPDATE_DEPENDENCIES += libconfig
+SWUPDATE_MAKE_ENV += HAVE_LIBCONFIG=y
+else
+SWUPDATE_MAKE_ENV += HAVE_LIBCONFIG=n
+endif
+
+ifeq ($(BR2_PACKAGE_LIBCURL),y)
+SWUPDATE_DEPENDENCIES += libcurl
+SWUPDATE_MAKE_ENV += HAVE_LIBCURL=y
+else
+SWUPDATE_MAKE_ENV += HAVE_LIBCURL=n
+endif
+
+ifeq ($(BR2_PACKAGE_LUA_5_2),y)
+SWUPDATE_DEPENDENCIES += lua
+SWUPDATE_MAKE_ENV += HAVE_LUA=y
+else
+SWUPDATE_MAKE_ENV += HAVE_LUA=n
+endif
+
+ifeq ($(BR2_PACKAGE_MTD),y)
+SWUPDATE_DEPENDENCIES += mtd
+SWUPDATE_MAKE_ENV += HAVE_LIBMTD=y
+SWUPDATE_MAKE_ENV += HAVE_LIBUBI=y
+else
+SWUPDATE_MAKE_ENV += HAVE_LIBMTD=n
+SWUPDATE_MAKE_ENV += HAVE_LIBUBI=n
+endif
+
+ifeq ($(BR2_PACKAGE_OPENSSL),y)
+SWUPDATE_DEPENDENCIES += openssl
+SWUPDATE_MAKE_ENV += HAVE_LIBSSL=y
+SWUPDATE_MAKE_ENV += HAVE_LIBCRYPTO=y
+else
+SWUPDATE_MAKE_ENV += HAVE_LIBSSL=n
+SWUPDATE_MAKE_ENV += HAVE_LIBCRYPTO=n
+endif
+
+ifeq ($(BR2_PACKAGE_ZLIB),y)
+SWUPDATE_DEPENDENCIES += zlib
+SWUPDATE_MAKE_ENV += HAVE_ZLIB=y
+else
+SWUPDATE_MAKE_ENV += HAVE_ZLIB=n
+endif
+
+SWUPDATE_BUILD_CONFIG = $(@D)/.config
+
+SWUPDATE_KCONFIG_FILE = $(call qstrip,$(BR2_PACKAGE_SWUPDATE_CONFIG))
+SWUPDATE_KCONFIG_EDITORS = menuconfig xconfig gconfig nconfig
+
+ifeq ($(BR2_PREFER_STATIC_LIB),y)
+define SWUPDATE_PREFER_STATIC
+	$(call KCONFIG_ENABLE_OPT,CONFIG_STATIC,$(SWUPDATE_BUILD_CONFIG))
+endef
+endif
+
+define SWUPDATE_SET_BUILD_OPTIONS
+	$(call KCONFIG_SET_OPT,CONFIG_CROSS_COMPILE,"$(TARGET_CROSS)", \
+		$(SWUPDATE_BUILD_CONFIG))
+	$(call KCONFIG_SET_OPT,CONFIG_SYSROOT,"$(STAGING_DIR)", \
+		$(SWUPDATE_BUILD_CONFIG))
+	$(call KCONFIG_SET_OPT,CONFIG_EXTRA_CFLAGS,"$(TARGET_CFLAGS)", \
+		$(SWUPDATE_BUILD_CONFIG))
+	$(call KCONFIG_SET_OPT,CONFIG_EXTRA_LDFLAGS,"$(TARGET_LDFLAGS)", \
+		$(SWUPDATE_BUILD_CONFIG))
+endef
+
+define SWUPDATE_KCONFIG_FIXUP_CMDS
+	$(SWUPDATE_PREFER_STATIC)
+	$(SWUPDATE_SET_BUILD_OPTIONS)
+endef
+
+define SWUPDATE_BUILD_CMDS
+	$(TARGET_MAKE_ENV) $(SWUPDATE_MAKE_ENV) $(MAKE) -C $(@D)
+endef
+
+define SWUPDATE_INSTALL_TARGET_CMDS
+	$(INSTALL) -D -m 0755 $(@D)/swupdate $(TARGET_DIR)/usr/bin/swupdate
+	$(if $(BR2_PACKAGE_SWUPDATE_INSTALL_WEBSITE), \
+		mkdir -p $(TARGET_DIR)/var/www/swupdate; \
+		cp -dpf $(@D)/www/* $(TARGET_DIR)/var/www/swupdate)
+endef
+
+$(eval $(kconfig-package))