[gnome-continuous-yocto/gnomeostree-3.28-rocko: 7018/8267] image_types.bbclass: ignore tar exit code 1

[Emmanuele Bassi <ebassi src gnome org>]

commit a9cab2f0edf693d336935c4f915c22fa5870b423
Author: Ed Bartosh <ed bartosh linux intel com>
Date:   Fri Jul 28 12:29:22 2017 +0300

    image_types.bbclass: ignore tar exit code 1
    
    tar exists with 1 and produces warning "file changed as we read it"
    if content is changed while tar archives it. Even hardlinking content
    causes tar to fail this way as it changes file ctime.
    
    Other tasks running in parallel with do_image_tar may need to hardlink
    rootfs content in order to change it, e.g. do_image_wic does this to
    update etc/fstab.
    
    Ignored tar exit code 1 to be able to hardlink rootfs content while
    do_rootfs_tar is tarring it.
    
    [RP: Removed bashism]
    
    (From OE-Core rev: 402b4cffbb4c58cfee93db18192f2b218ee0ae35)
    
    Signed-off-by: Ed Bartosh <ed bartosh linux intel com>
    Signed-off-by: Richard Purdie <richard purdie linuxfoundation org>

 meta/classes/image_types.bbclass |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/meta/classes/image_types.bbclass b/meta/classes/image_types.bbclass
index cf946a6..ae4ed4f 100644
--- a/meta/classes/image_types.bbclass
+++ b/meta/classes/image_types.bbclass
@@ -119,7 +119,8 @@ IMAGE_CMD_squashfs-lzo = "mksquashfs ${IMAGE_ROOTFS} ${IMGDEPLOYDIR}/${IMAGE_NAM
 # In practice, it turned out to be not needed when creating archives and
 # required when extracting, but it seems prudent to use it in both cases.
 IMAGE_CMD_TAR ?= "tar"
-IMAGE_CMD_tar = "${IMAGE_CMD_TAR} -cvf ${IMGDEPLOYDIR}/${IMAGE_NAME}${IMAGE_NAME_SUFFIX}.tar -C 
${IMAGE_ROOTFS} ."
+# ignore return code 1 "file changed as we read it" as other tasks(e.g. do_image_wic) may be hardlinking 
rootfs
+IMAGE_CMD_tar = "${IMAGE_CMD_TAR} -cf ${IMGDEPLOYDIR}/${IMAGE_NAME}${IMAGE_NAME_SUFFIX}.tar -C 
${IMAGE_ROOTFS} . || [ $? -eq 1 ]"
 
 do_image_cpio[cleandirs] += "${WORKDIR}/cpio_append"
 IMAGE_CMD_cpio () {