ref-manual: tasks: do_cleanall: recommend using '-f' instead

do_cleanall can produce failures when used in legitimate cases, such as
with recipe variants (foo and foo-native) or a shared DL_DIR. This is why
it is forbidden when writing tests that will run on the autobuilders
(https://docs.yoctoproject.org/test-manual/intro.html?highlight=cleanall#considerations-when-writing-tests).

Reword the documentation to clearly discourage, provide a safe alternative
(bitbake -f -c fetch), and the rationale with an example.

Reported-by: Sam Liddicott
Link: https://bootlin.com/blog/yocto-sharing-the-sstate-cache-and-download-directories/#comment-2650335
(From yocto-docs rev: bfeb00f9213b9d2650ccf03ea666387415227be4)

Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Reviewed-by: Quentin Schulz <quentin.schulz@theobroma-systems.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

0 files changed, 0 insertions, 0 deletions