Signed-off-by: Leah Rowe <leah@libreboot.org>

handle errors on sha512sum - also handle awk errors inside
the mini subshell, and provide overall error handling.

we know that the project.hash file should always exist, and
always be read no matter what; technically, the find command
that proceeds it might not yield any results, but an empty
file would then be produced.

the edge case of an empty file would have lead to an error
beforehand, when configuring the project in function,
configure_project(), so we've already got that covered.

Signed-off-by: Leah Rowe <leah@libreboot.org>

when reading old_pjhash, we need to error out where a read
error occurs. such an error is unlikely, but could occur under
certain edge cases.

Signed-off-by: Leah Rowe <leah@libreboot.org>

Don't do no-op if it fails; fall back to "clean" instead,
and fail if that fails.

The no-op was there was not all projects have distclean,
but we do intend for them all to be cleaned.

We mitigate further error by only running make-clean if
a makefile exists.

Signed-off-by: Leah Rowe <leah@libreboot.org>

Signed-off-by: Leah Rowe <leah@libreboot.org>

i overlooked this one in the previous commit

there is always one.

Signed-off-by: Leah Rowe <leah@libreboot.org>

not elf/UTIL/TREE

This way, they are automatically deleted when a tree
has to be re-built.

Signed-off-by: Leah Rowe <leah@libreboot.org>

Don't copy the files directly, because we might be doing
this from a work directory that has no files; in this case,
generic "unknown" variables are used, without generating
any files, so the current logic would produce an error.

However, we do need to create those dot files, because
we then rely on them for building release binaries.

The new logic maintains current behaviour, while fixing
this technical edge-case scenario via mitigation.

Signed-off-by: Leah Rowe <leah@libreboot.org>

Signed-off-by: Leah Rowe <leah@libreboot.org>

Signed-off-by: Leah Rowe <leah@libreboot.org>