Start versioning trace files

Start versioning trace files with a unique date. Any time we need to
create new trace files, change TRACE_FILES_VERSION in this script and
copy to traces-{positive,negative,info}-<VERSION>.zip.

The zip file should unzip to traces-{positive,negative,info}, without
any version.

Signed-off-by: Mark Stemm <mark.stemm@gmail.com>

test/run_regression_tests.sh

@@ -20,13 +20,19 @@ set -euo pipefail
 SCRIPT=$(readlink -f $0)
 SCRIPTDIR=$(dirname "$SCRIPT")
 
+# Trace file tarballs are now versioned. Any time a substantial change
+# is made that affects the interaction of rules+engine and the trace
+# files here, upload a new trace file zip file and change the version
+# suffix here.
+TRACE_FILES_VERSION=20200831
+
 function download_trace_files() {
     for TRACE in traces-positive traces-negative traces-info ; do
     if [ ! -e "$TRACE_DIR/$TRACE" ]; then
         if [ "$OPT_BRANCH" != "none" ]; then
         curl -fso "$TRACE_DIR/$TRACE.zip" https://s3.amazonaws.com/download.draios.com/falco-tests/$TRACE-$OPT_BRANCH.zip
         else
-        curl -fso "$TRACE_DIR/$TRACE.zip" https://s3.amazonaws.com/download.draios.com/falco-tests/$TRACE.zip
+        curl -fso "$TRACE_DIR/$TRACE.zip" https://s3.amazonaws.com/download.draios.com/falco-tests/$TRACE-$TRACE_FILES_VERSION.zip
         fi
         unzip -d "$TRACE_DIR" "$TRACE_DIR/$TRACE.zip"
         rm -rf "$TRACE_DIR/$TRACE.zip"