Hello All,
I recently ran into a problem in
meta-raspberrypi/classes/sdcard_image-rpi.bbclass
The following was run through my default debian dash shell (I thought I
switched a while back, but I must have reverted my VM image or
something...).
# If SDIMG_ROOTFS_TYPE is a .xz file use xzcat
if [[ "$SDIMG_ROOTFS_TYPE" == *.xz ]]
then
The bash specific syntax ([[) failed in dash causing the "else" path to
be traversed instead of the correct "then" path. The failure was silent
and resulted in a blind copy of a compressed rootfs to the sdcard
image. Of course this didn't run. :)
1. Is there particular shell syntax that class files should stick too?
2. I couldn't find a wildcard string search in dash. Can anyone
suggest a more shell agnostic way to do this?
3. Is there a way to guarantee we're running in bash if we're using
bash specific syntax?
My solution was the following, but it's less readable.
if echo "${SDIMG_ROOTFS_TYPE}" | egrep -q "*\.xz"
Thanks,
Seth
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