[OE-core] How to move a recipe to another directory without invalidating its sstate-cache?

[Mike Looijmans]

On 16-12-15 13:35, Richard Purdie wrote:
> On Wed, 2015-12-16 at 10:38 +0100, Mike Looijmans wrote:
>> I renamed "recipes-some/foo/bar.bb" to "recipes-some/buzz/bar.bb"
>>
>> Rebuilding bar and its dependencies will take about 16 hours. So I
>> don't want
>> to trigger a rebuild.
>>
>> running "bitbake -S printdiff bar" only reveils this:
>
> I'm not sure I trust the output of -S printdiff, there are some cases
> it doesn't seem to "guess" right. I wish I or someone one could fix but
> but we can do its work manually. Can you try something like:
>
> set TMPDIR = "x"
> bitbake -S bar
> rename the recipe
> set TMPDIR = "y"
> bitbake -S bar

Found out I need an extra "none" in here:
bitbake -S none bar

>
> then
>
> "ls tmp-x/stamps/xxxx/bar"
> "ls tmp-y/stamps/xxxx/bar"
>
> and see which tasks change signature. Then run:
>
> "bitbake-diffsigs <sig A> <sig B>"
>
> and see if that makes more sense?

That gave the same output. Everything after "runtaskdeps" is bogus because its 
value changes from [blahblah, foobar] into [buzbar, blahblah] and now diffsig 
seems to attempt to match the "blahblah" signatures against those of "buzbar".

Which sort of hints that if my new name starts with an "f" the reordering 
won't happen, so I'm gonna try renaming to "fbuz" now,,,




Kind regards,

Mike Looijmans
System Expert

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