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New options are:
* -t|--topic : add a 'topic' to current setup (default: empty)
* -V|--version : display aglsetup version
The topic value can be any string and it is propagated to aglsetup.manifest,
which in turn is used by distro-build-manifest to put it in DIST_BUILD_TOPIC
variable in all build manifests (deploy dir, target image, sdk)
Using the --topic option to specify a unique identifier will help to provide a
common ID for all builds in the same "family" even if features and layers differ.
For this purpose, a topic could be:
* a gerrit review id + a patchset number
* a project name (git repo) + a Change-Id
* a random UUID
* ...
When run with -V or --version, aglsetup writes its version on stdout and sets
the variable AGLSETUP_VERSION then exits. As aglsetup can only be called by
being sourced, the AGLSETUP_VERSION variable is finally set in the caller
environment.
The version can be used for various purposes. The immediate goal is to detect
if --topic option is supported or not.
Bug-AGL: SPEC-2646
Cherry-picked-from: master (8cbd61a838bfa3f46f66b5641c27c0492ceba2d8)
Change-Id: I28184f6b922bac23cc0cdb6892acd36783d18f06
Signed-off-by: Stephane Desneux <stephane.desneux@iot.bzh>
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Stephane Desneux
José Bollo