[kirkstone][PATCH] 3/3] image_types_sparse: backport optionally remove RAW image

[AshishKumar Mishra <emailaddress.ashish@gmail.com>]

From: AshishKumar Mishra <emailaddress.ashish@gmail.com>

When creating sparse images, the RAW image is no longer needed in
some workflows such as Android and CI pipelines. These RAW images
can be multi-GB artifacts and consume significant disk space.

This change introduces a configuration option
`DELETE_RAWIMAGE_AFTER_SPARSE_CMD` which, when set to "1",
removes the RAW image after sparse image generation.

This reduces disk usage in builds where sparse images are the
final deliverables and RAW images are not required.

Default behavior is unchanged: RAW images are kept unless the
variable is explicitly enabled:

This change corresponds to upstream  f5246b7df447ac76ec04c6e5add398862d1c9ccd

    DELETE_RAWIMAGE_AFTER_SPARSE_CMD = "1"   # Delete RAW image
    DELETE_RAWIMAGE_AFTER_SPARSE_CMD = "0"   # Default behavior

Signed-off-by: AshishKumar Mishra <emailaddress.ashish@gmail.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: AshishKumar Mishra <emailaddress.ashish@gmail.com>
---
 meta-oe/classes/image_types_sparse.bbclass | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/meta-oe/classes/image_types_sparse.bbclass b/meta-oe/classes/image_types_sparse.bbclass
index 8668739fd9..81dba96305 100644
--- a/meta-oe/classes/image_types_sparse.bbclass
+++ b/meta-oe/classes/image_types_sparse.bbclass
@@ -8,9 +8,17 @@ inherit image_types
 SPARSE_BLOCK_SIZE ??= "4096"
 
 CONVERSIONTYPES += "sparse"
+
+DELETE_RAWIMAGE_AFTER_SPARSE_CMD ??= "0"
+
 CONVERSION_CMD:sparse = " \
-    INPUT="${IMAGE_NAME}${IMAGE_NAME_SUFFIX}.${type}" && \
-    truncate --no-create --size=%${SPARSE_BLOCK_SIZE} "$INPUT" && \
-    img2simg -s "$INPUT" "$INPUT.sparse" ${SPARSE_BLOCK_SIZE} \
+    INPUT=${IMAGE_NAME}${IMAGE_NAME_SUFFIX}.${type} && \
+    truncate --no-create --size=%${SPARSE_BLOCK_SIZE} $INPUT && \
+    img2simg $INPUT $INPUT.sparse && \
+    if [ ${DELETE_RAWIMAGE_AFTER_SPARSE_CMD} = 1 ]; then \
+        rm -f $INPUT; \
+        bbwarn 'Raw file $INPUT removed'; \
+    fi \
 "
+
 CONVERSION_DEPENDS_sparse = "android-tools-native"
-- 
2.43.0