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#!/bin/bash
# This script runs a BuildStream build for a given element, unless there
# is a suitable artifact already in the remote cache in which case it just
# runs `bst show`.
#
# It is intended for use by on-demand CI workers. If we just call `bst build`
# and there is nothing to build then the CI worker will pull all of the remote
# artifacts into a local cache, which will probably then be discarded anyway.
set -eu
bst_target="$1"
if [ "$(bst show $bst_target --deps none --format '%{state}')" == 'cached' ]; then
bst --colors show $bst_target
else
bst --colors build $bst_target
fi
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