arm-autonomy: Create xenguest-base-image recipe

Add xenguest-base-image recipe to create an initial xenguest image
directory in deploy.
This is using the xenguest-image class.
The recipe is also introducing several parameters named
XENGUEST_IMAGE_SRC_URI_* to allow the user to specify files or elements
to be added to the xenguest image.
Those parameters are documented inside the recipe.

Change-Id: I806a2fa07fb9593c366d88e2f4ee8b649cbcf8ea
Issue-Id: SCM-767
Signed-off-by: Bertrand Marquis <bertrand.marquis@arm.com>
Reviewed-by: Diego Sueiro <diego.sueiro@arm.com>
Signed-off-by: Jon Mason <jon.mason@arm.com>

meta-arm-autonomy/recipes-extended/xenguest/xenguest-base-image.bb

@@ -0,0 +1,119 @@
+# Create a xenguest base image
+#
+# This recipe creates a base image that is then extended by other recipes
+# through xenguest-image class.
+# xenguest image type is using this as base to add a kernel and a disk image
+# to create a guest
+#
+# The recipe is also adding files in those directories to the xenguest image:
+# - ${WORKDIR}/extend/disk-files: all files in this directory will be added to
+#   the guest disk files (using --disk-add-file)
+# - ${WORKDIR}/extend/files: all files in this directory will be added to the
+#   guest xen files (using --xen-add-file)
+# - ${WORKDIR}/extend/guest.d: all files in this directory will be added to
+#   the xen append configuration files (using --xen-append)
+# - ${WORKDIR}/extend/init.[pre|post|d]: all files in those directories will
+#   be added to the corresponding init scripts (using --init-[pre|post|script])
+# You can bbappend this recipe and put files in ${WORKDIR}/extend to add
+# elements to the image.
+#
+
+DESCRIPTION = "Xenguest Base Image"
+LICENSE = "MIT"
+
+LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/MIT;md5=0835ade698e0bcf8506ecda2f7b4f302"
+
+#
+# The following variables can contain SRC_URI compatible entries to add
+# files to the xenguest image.
+# You can set those variable in local.conf to add one or several files
+# For example to add a boot.tar.gz file that has to be downloaded to the file
+# useable for disk partition initialisation:
+# XENGUEST_IMAGE_SRC_URI_DISK_FILES += "https://www.test.com/files/boot.tar.gz"
+
+# Add disk files
+XENGUEST_IMAGE_SRC_URI_DISK_FILES ??= ""
+
+# Add xen files
+XENGUEST_IMAGE_SRC_URI_XEN_FILES ??= ""
+
+# Add xen configuration elements
+XENGUEST_IMAGE_SRC_URI_XEN_CONFIG ??= ""
+
+# Add pre init script
+XENGUEST_IMAGE_SRC_URI_INIT_PRE ??= ""
+
+# Add init script
+XENGUEST_IMAGE_SRC_URI_INIT ??= ""
+
+# Add post init script
+XENGUEST_IMAGE_SRC_URI_INIT_POST ??= ""
+
+S = "${WORKDIR}"
+
+inherit deploy xenguest-image
+
+# parse XENGUEST_IMAGE_SRC_URI_ variables and add them to SRC_URI
+python __anonymous() {
+    def parse_extend_variable(d, varname, destdir):
+        list = d.getVar(varname)
+        if list:
+            for entry in list.split():
+                #Check the URL
+                try:
+                    decode = bb.fetch.decodeurl(entry)
+                    d.appendVar('SRC_URI', ' ' + entry + ';unpack=0;subdir=extend/' + destdir)
+                except:
+                    bb.fatal("%s: %s contains an invalid URL:  %s" \
+                    % (d.getVar('PF'), varname, entry))
+
+    parse_extend_variable(d, 'XENGUEST_IMAGE_SRC_URI_DISK_FILES', 'disk-files')
+    parse_extend_variable(d, 'XENGUEST_IMAGE_SRC_URI_XEN_FILES', 'files')
+    parse_extend_variable(d, 'XENGUEST_IMAGE_SRC_URI_XEN_CONFIG', 'guest.d')
+    parse_extend_variable(d, 'XENGUEST_IMAGE_SRC_URI_INIT_PRE', 'init.pre')
+    parse_extend_variable(d, 'XENGUEST_IMAGE_SRC_URI_INIT', 'init.d')
+    parse_extend_variable(d, 'XENGUEST_IMAGE_SRC_URI_INIT_POST', 'init.post')
+}
+
+# Make sure we are removing old files before redoing a fetch
+do_fetch[cleandirs] += "${WORKDIR}/extend"
+
+do_configure[noexec] = "1"
+do_compile[noexec] = "1"
+do_install[noexec] = "1"
+
+add_extend_files() {
+    local subdir="$1"
+    local cmd="$2"
+    local stripdest="${3:-n}"
+
+    if [ -d ${WORKDIR}/extend/$subdir ]; then
+        filelist=$(find ${WORKDIR}/extend/$subdir -type f)
+
+        if [ -n "$filelist" ]; then
+            for f in $filelist; do
+                if [ "$stripdest" = "y" ]; then
+                    call_xenguest_mkimage update --$cmd=$f:$(basename $f)
+                else
+                    call_xenguest_mkimage update --$cmd=$f
+                fi
+            done
+        fi
+    fi
+}
+
+do_deploy() {
+    # Create a new image
+    xenguest_image_create
+
+    # Add our extra files if any
+    add_extend_files "disk-files" "disk-add-file" "y"
+    add_extend_files "files" "xen-add-file" "y"
+    add_extend_files "guest.d" "xen-append"
+    add_extend_files "init.pre" "init-pre"
+    add_extend_files "init.d" "init-script"
+    add_extend_files "init.post" "init-post"
+}
+
+addtask deploy after do_install before do_build
+