[Buildroot] [PATCH v2] package/systemd: use current tool for generating HWDB

[Yann E. MORIN]

Norbert, All,

On 2020-07-11 00:26 +0200, Norbert Lange spake thusly:
> udevadm has been deprecated for a while(for bulding the DB),
> systemd-hwdb should be used in its place.
> 
> this tool further has a switch to generate the database in
> /usr which is a better place for a one-time created file.

... rather than the default /etc/udev.

> Also remove the config files from both paths
> (rootfs overlay could add stuff) aswell as the service and tool
> from the target fs.

This 'also' hints at the need to split the patch in two: one to switch
to using systemd-hwdb, and one to remove the service.

However, I'm against removing the service altogether, because in the
past, some people have expressed the need to be able to update the hwdb
on-target.

I would be OK with having a drop-in that disables the service by default
when BR2_TARGET_GENERIC_REMOUNT_ROOTFS_RW is not set, though.

> Signed-off-by: Norbert Lange <nolange79 at gmail.com>
> 
> ---
> v1 -> v2
> -   fix removal of service
> ---
>  package/systemd/systemd.mk | 9 ++++++---
>  1 file changed, 6 insertions(+), 3 deletions(-)
> 
> diff --git a/package/systemd/systemd.mk b/package/systemd/systemd.mk
> index 1a8eb86e53..05c1d1ff9a 100644
> --- a/package/systemd/systemd.mk
> +++ b/package/systemd/systemd.mk
> @@ -229,11 +229,14 @@ endif
>  ifeq ($(BR2_PACKAGE_SYSTEMD_HWDB),y)
>  SYSTEMD_CONF_OPTS += -Dhwdb=true
>  define SYSTEMD_BUILD_HWDB
> -	$(HOST_DIR)/bin/udevadm hwdb --update --root $(TARGET_DIR)
> +	$(HOST_DIR)/bin/systemd-hwdb update --root $(TARGET_DIR) --usr

Don;t we want to use --strict too?

Regards,
Yann E. MORIN.

>  endef
>  SYSTEMD_TARGET_FINALIZE_HOOKS += SYSTEMD_BUILD_HWDB
>  define SYSTEMD_RM_HWDB_SRV
> -	rm -rf $(TARGET_DIR)/$(HOST_EUDEV_SYSCONFDIR)/udev/hwdb.d/
> +	rm -rf $(TARGET_DIR)/usr/lib/udev/hwdb.d/ $(TARGET_DIR)/etc/udev/hwdb.d/ \
> +		$(TARGET_DIR)/usr/lib/systemd/system/systemd-hwdb-update.service \
> +		$(TARGET_DIR)/usr/lib/systemd/system/*/systemd-hwdb-update.service \
> +		$(TARGET_DIR)/usr/bin/systemd-hwdb
>  endef
>  SYSTEMD_ROOTFS_PRE_CMD_HOOKS += SYSTEMD_RM_HWDB_SRV
>  else
> @@ -633,7 +636,7 @@ HOST_SYSTEMD_CONF_OPTS = \
>  	-Dsysusers=false \
>  	-Dtmpfiles=false \
>  	-Dimportd=false \
> -	-Dhwdb=false \
> +	-Dhwdb=true \
>  	-Drfkill=false \
>  	-Dman=false \
>  	-Dhtml=false \
> -- 
> 2.27.0
> 

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