feat(bisect): introduce scripts for VPP bisecting

+ Parsing common with per-patch job is moved to a library.

Ticket: CSIT-1618

Change-Id: I185bea084a29e6a37ef94e9da42b192a6a81fc17
Signed-off-by: Vratko Polak <vrpolak@cisco.com>

1 files changed, 19 insertions, 1 deletions

diff --git a/resources/libraries/bash/function/common.sh b/resources/libraries/bash/function/common.sh
index 44149ca6e1..c2b169f550 100644
--- a/resources/libraries/bash/function/common.sh
+++ b/resources/libraries/bash/function/common.sh
@@ -290,7 +290,7 @@ function compose_robot_arguments () {
         *"device"*)
             ROBOT_ARGS+=("--suite" "tests.${DUT}.device")
             ;;
-        *"perf"*)
+        *"perf"* | *"bisect"*)
             ROBOT_ARGS+=("--suite" "tests.${DUT}.perf")
             ;;
         *)
@@ -557,6 +557,8 @@ function get_test_tag_string () {
     # Variables set:
     # - TEST_TAG_STRING - The string following trigger word in gerrit comment.
     #   May be empty, or even not set on event types not adding comment.
+    # - GIT_BISECT_FROM - If bisecttest, the commit hash to bisect from.
+    #   Else not set.
     # Variables exported optionally:
     # - GRAPH_NODE_VARIANT - Node variant to test with, set if found in trigger.
 
@@ -566,6 +568,10 @@ function get_test_tag_string () {
 
     if [[ "${GERRIT_EVENT_TYPE-}" == "comment-added" ]]; then
         case "${TEST_CODE}" in
+            # Order matters, bisect job contains "perf" in its name.
+            *"bisect"*)
+                trigger="bisecttest"
+                ;;
             *"device"*)
                 trigger="devicetest"
                 ;;
@@ -591,6 +597,18 @@ function get_test_tag_string () {
             comment=$(fgrep "${trigger}" <<< "${comment}" || true)
             TEST_TAG_STRING=$("${cmd[@]}" <<< "${comment}" || true)
         fi
+        if [[ "${trigger}" == "bisecttest" ]]; then
+            # Intentionally without quotes, so spaces delimit elements.
+            test_tag_array=(${TEST_TAG_STRING}) || die "How could this fail?"
+            # First "argument" of bisecttest is a commit hash.
+            GIT_BISECT_FROM="${test_tag_array[0]}" || {
+                die "Bisect job requires commit hash."
+            }
+            # Update the tag string (tag expressions only, no commit hash).
+            TEST_TAG_STRING="${test_tag_array[@]:1}" || {
+                die "Bisect job needs a single test, no default."
+            }
+        fi
         if [[ -n "${TEST_TAG_STRING-}" ]]; then
             test_tag_array=(${TEST_TAG_STRING})
             if [[ "${test_tag_array[0]}" == "icl" ]]; then