wic:plugins:otaimage.py: fix a potential issue

do_image_wic task is a standalone task that depending on
do_image_ota_ext4, so it's possible that do_image_wic runs
(taskhash contaminated) but do_image_ota_ext4 does not (taskhash not
contaminated), in which case, the otaimage would be in DEPLOY_DIR_IMAGE
instead of in IMGDEPLOYDIR, so we need check both of them.

Also, the logger.error is not supposed to raise a error, it just
prints out a error message, so we should use WicError.

And another typo is it checks IMGDEPLOYDIR but reports DEPLOY_DIR_IMAGE
not exist, also fix that.

Signed-off-by: Ming Liu <liu.ming50@gmail.com>

1 files changed, 18 insertions, 6 deletions

diff --git a/scripts/lib/wic/plugins/source/otaimage.py b/scripts/lib/wic/plugins/source/otaimage.py
index 4b30776..1f82af7 100644
--- a/scripts/lib/wic/plugins/source/otaimage.py
+++ b/scripts/lib/wic/plugins/source/otaimage.py
@@ -19,6 +19,7 @@ import logging
 import os
 import sys
 
+from wic import WicError
 from wic.plugins.source.rawcopy import RawCopyPlugin
 from wic.misc import get_bitbake_var
 
@@ -32,6 +33,18 @@ class OTAImagePlugin(RawCopyPlugin):
     name = 'otaimage'
 
     @classmethod
+    def _get_src_file(cls, image_dir_var):
+        """
+        Get OTA image file from image directory variable.
+        """
+        image_dir = get_bitbake_var(image_dir_var)
+        if not image_dir:
+            raise WicError("Couldn't find %s, exiting" % image_dir_var)
+
+        image_file = image_dir + "/" + get_bitbake_var("IMAGE_LINK_NAME") + ".ota-ext4"
+        return image_file if os.path.exists(image_file) else ""
+
+    @classmethod
     def do_prepare_partition(cls, part, source_params, cr, cr_workdir,
                              oe_builddir, bootimg_dir, kernel_dir,
                              rootfs_dir, native_sysroot):
@@ -39,13 +52,12 @@ class OTAImagePlugin(RawCopyPlugin):
         Called to do the actual content population for a partition i.e. it
         'prepares' the partition to be incorporated into the image.
         """
-        bootimg_dir = get_bitbake_var("IMGDEPLOYDIR")
-        if not bootimg_dir:
-            logger.error("Couldn't find DEPLOY_DIR_IMAGE, exiting\n")
-
-        logger.debug('Bootimg dir: %s' % bootimg_dir)
 
-        src = bootimg_dir + "/" + get_bitbake_var("IMAGE_LINK_NAME") + ".ota-ext4"
+        src = cls._get_src_file("IMGDEPLOYDIR")
+        if not src:
+            src = cls._get_src_file("DEPLOY_DIR_IMAGE")
+        if not src:
+            raise WicError("Couldn't find ota image in IMGDEPLOYDIR or DEPLOY_DIR_IMAGE, exiting")
 
         logger.debug('Preparing partition using image %s' % (src))
         source_params['file'] = src