Re: [PATCH 4/6] Enable proper rebuilds on dependency changes

[Alexander Smirnov <asmirnov@ilbers.de>]

On 02/12/2018 10:59 AM, Jan Kiszka wrote:
> From: Jan Kiszka <jan.kiszka@siemens.com>
> 
> Install a basichash as signature handler and set the stamp policy to
> full - and suddenly we get proper rebuilds of the image and all affected
> packages when some recipe down the dependency chain changed!
> 
> We are using the legacy bitbake mechanism here as we do not have
> setscene machinery like OE. Still good enough for us.
> 

BTW: have you tried this? Two years ago I tried it in Yocto and it 
didn't work properly, not all the dependents were rebuilt. If it works, 
it's a very good feature!

Also do you know if this feature relies on DEPENDS variable? If so, we 
should keep this in mind with the idea to drop DEPENDS from recipes.

Alex

> Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
> ---
>   meta/conf/isar-bitbake.conf | 5 ++---
>   1 file changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/meta/conf/isar-bitbake.conf b/meta/conf/isar-bitbake.conf
> index 660e0c0..c01e486 100644
> --- a/meta/conf/isar-bitbake.conf
> +++ b/meta/conf/isar-bitbake.conf
> @@ -37,9 +37,8 @@ BB_HASHCONFIG_WHITELIST ?= "${BB_HASHBASE_WHITELIST} DATE TIME SSH_AGENT_PID \
>       GIT_PROXY_COMMAND ALL_PROXY all_proxy NO_PROXY no_proxy FTP_PROXY ftp_proxy \
>       HTTP_PROXY http_proxy HTTPS_PROXY https_proxy SOCKS5_USER SOCKS5_PASSWD \
>       BB_SETSCENE_ENFORCE BB_CMDLINE BB_SERVER_TIMEOUT"
> -
> -# Setup our default hash policy
> -BB_SIGNATURE_HANDLER ?= "noop"
> +BB_SIGNATURE_HANDLER ?= "basichash"
> +BB_STAMP_POLICY ?= "full"
>   
>   # Add event handlers for bitbake
>   INHERIT += "isar-events"
>