[PATCH] qemuboot.bbclass: do not hook into do_rootfs

[Patrick Ohly <patrick.ohly@intel.com>]

Writing qemuboot.conf in write_qemuboot_conf() does not modify the
rootfs and thus conceptually shouldn't be executed as part of rootfs
creation.

Running it as separate task is cleaner and fixes the problem of
missing qemuboot.conf files for meta-swupd virtual images; those
images replace do_rootfs and ROOTFS_POSTPROCESS_COMMANDs don't run at
all.

The task gets added such that it runs roughly at the same time as
before. Probably it doesn't actually need to depend on do_rootfs, but
this way we don't write a useless qemuboot.conf in cases where
do_rootfs fails.

Signed-off-by: Patrick Ohly <patrick.ohly@intel.com>
---
 meta/classes/qemuboot.bbclass | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/meta/classes/qemuboot.bbclass b/meta/classes/qemuboot.bbclass
index 39df3ad..8b1d4d0 100644
--- a/meta/classes/qemuboot.bbclass
+++ b/meta/classes/qemuboot.bbclass
@@ -42,7 +42,7 @@ QB_DEFAULT_FSTYPE ?= "ext4"
 QB_OPT_APPEND ?= "-show-cursor"
 
 # Create qemuboot.conf
-ROOTFS_POSTPROCESS_COMMAND += "write_qemuboot_conf; "
+addtask do_write_qemuboot_conf after do_rootfs before do_image
 
 def qemuboot_vars(d):
     build_vars = ['MACHINE', 'TUNE_ARCH', 'DEPLOY_DIR_IMAGE',
@@ -51,8 +51,8 @@ def qemuboot_vars(d):
                 'STAGING_DIR_HOST']
     return build_vars + [k for k in d.keys() if k.startswith('QB_')]
 
-write_qemuboot_conf[vardeps] += "${@' '.join(qemuboot_vars(d))}"
-python write_qemuboot_conf() {
+do_write_qemuboot_conf[vardeps] += "${@' '.join(qemuboot_vars(d))}"
+python do_write_qemuboot_conf() {
     import configparser
 
     qemuboot = "%s/%s.qemuboot.conf" % (d.getVar('DEPLOY_DIR_IMAGE', True), d.getVar('IMAGE_NAME', True))
-- 
2.1.4