tcwg_kernel-build: Fill reset_artifacts.

Change-Id: Icec96100e32fc5df26f1536c0102c1431d7c971c

1 files changed, 20 insertions, 0 deletions

diff --git a/tcwg_kernel-build.sh b/tcwg_kernel-build.sh
index 7932d3d8..08e88736 100755
--- a/tcwg_kernel-build.sh
+++ b/tcwg_kernel-build.sh
@@ -99,8 +99,28 @@ fi
 
 run_step_init "$start_at" "$finish_at" "$top_artifacts" "base-artifacts" "$verbose"
 
+# Reset artifacts to an empty state.  $top_artifacts/results is the most
+# important artifact, since it records the metric of how successful the build
+# is.
 reset_artifacts ()
 {
+    (
+    set -euf -o pipefail
+
+    # We are called by run_step, which writes to console.log files,
+    # so remove everything but these files.
+    find $top_artifacts -maxdepth 1 ! -path $top_artifacts ! -path $top_artifacts/console.log ! -path $run_step_artifacts ! -path $run_step_artifacts/console.log -print0 | xargs -0 rm -rf
+
+    # Set success metric to worst possible (-3).
+    echo "Starting build" > $top_artifacts/results
+    echo "-3" >> $top_artifacts/results
+
+    # Clone base-artifacts so that run_step can rsync artifacts for skipped
+    # steps.
+    # TODO: base-artifacts repo is starting to get big, so we should
+    # fetch only the $baseline branch, instead of all branches.
+    clone_or_update_repo base-artifacts $baseline https://git-us.linaro.org/toolchain/ci/base-artifacts.git
+    )
 }
 
 clone_repo ()