As of the move to Python 3 and the fixes we applied at that time,
bb.process.run() will return a byte array of length 0 rather than an
empty string if the output is empty. That may be a bug that we should
fix, but for now it's easiest to just check the result here before
treating it as a string. This fixes running "devtool update-recipe" or
"devtool finish" on a recipe which has no source tree, for example
initramfs-framework.
Fixes [YOCTO #10563].
(From OE-Core rev: 66bf6978fc807ecc422fb6b6328f68bc3406cf15)
Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
0ffd92707b