[yocto] Revision file in images

[Anders Darander]

* Marc Ferland <ferlandm at sonatest.com> [121012 17:40]:

> Hi,

> Is a revision file populated in the images produced by the build process?
> Something listing the revisions of the different layers used. Just like
> the "OE Build Configuration" summary.

As Saul wrote, I don't know any way of getting this info.


> I'd like to easily identify what a target system currently runs.

In my own project, I'm using something like:


IMAGE_PREPROCESS_COMMAND += "rootfs_update_timestamp ;\
             git describe --dirty --long --always
>${IMAGE_ROOTFS}/etc/build ;\
             "

This doesn't explicitly put the SHA1's of the included layers into the
rootfs, but it does put my the most recent tag from my top-layer,
together with the number of commits after that tag, and an abreviated version
of the current commits SHA1 into the file /etc/build. This will give me
all info I need.

Cheers,
Anders

> Regards,

> Marc
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-- 
Anders Darander
ChargeStorm AB / eStorm AB