WIP: fix Simnet trigger (#8493)

* CI: trigger guard [skip ci]

* CI: variables and dotenv [skip ci]

* CI: correct variable for simnet trigger

* CI: correct rules for simnet trigger

* fix linting issue :)

* CI: trigger simnet via API

Co-authored-by: radupopa2010 <radupopa2010@yahoo.com>

substrate/.maintain/gitlab/trigger_pipeline.sh

@@ -0,0 +1,45 @@
+#!/bin/bash
+
+set -eu
+# API trigger another project's pipeline
+curl --silent \
+    -X POST \
+    -F "token=${CI_JOB_TOKEN}" \
+    -F "ref=master" \
+    -F "variables[TRGR_PROJECT]=${TRGR_PROJECT}" \
+    -F "variables[TRGR_REF]=${TRGR_REF}" \
+    -F "variables[IMAGE_NAME]=${IMAGE_NAME}" \
+    -F "variables[IMAGE_TAG]=${IMAGE_TAG}" \
+    "https://${CI_SERVER_HOST}/api/v4/projects/${DWNSTRM_ID}/trigger/pipeline" | \
+        tee pipeline
+
+PIPELINE_ID=$(cat pipeline | jq ".id")
+echo "\nWaiting on ${PIPELINE_ID} status..."
+
+# This part polls for the triggered pipeline status, the native
+# `trigger` job does not return this status via API.
+# This is a workaround for a Gitlab bug, waits here until
+# https://gitlab.com/gitlab-org/gitlab/-/issues/326137 gets fixed.
+# The timeout is 360 curls with 8 sec interval, roughly an hour.
+
+function get_status() {
+    curl --silent \
+        --header "PRIVATE-TOKEN: ${PIPELINE_TOKEN}" \
+        "https://${CI_SERVER_HOST}/api/v4/projects/${DWNSTRM_ID}/pipelines/${PIPELINE_ID}" | \
+            jq --raw-output ".status";
+}
+
+for i in $(seq 1 360); do
+    STATUS=$(get_status);
+    echo "Triggered pipeline status is ${STATUS}";
+    if [[ ${STATUS} =~ ^(pending|running|created)$ ]]; then
+        echo "Busy...";
+    elif [[ ${STATUS} =~ ^(failed|canceled|skipped|manual)$ ]]; then
+        exit 1;
+    elif [[ ${STATUS} =~ ^(success)$ ]]; then
+        exit 0;
+    else
+        exit 1;
+    fi
+sleep 8;
+done