Restore 'eventuals' needed script (#83)

.github/workflows/scripts/check-if-issue-and-pr-exist.sh

@@ -0,0 +1,31 @@
+#!/bin/bash
+# This script is used by the 'eventuals'.
+# The scripts requires the REPO and GITHUB_TOKEN to be presented in environment variables.
+# REPO is repository owner and name, e.g. 'reboot-dev/dev-tools'
+# GITHUB_TOKEN is a GitHub Personal Access Token
+
+# The scripts gets Pull Request and Issue titles as arguments.
+# Any spaces in the titles must be replaced with "+".
+# Usage example:
+# ./check-if-issue-and-pr-exist.sh Submodule-sync+Update+submodule+to+its+latest+version Submodule+sync+failed+for+repo
+
+PR_TITLE=$1     # Pull Request title - the first argument
+ISSUE_TITLE=$2  # Issue title - the second argument
+
+# The API URLs in conditions below search for any existing pull requests and issues using wildcard and
+# generates ISSUE_EXISTS and PR_EXISTS environment variables and places those in the environment for next steps
+# through $GITHUB_ENV;
+# See https://docs.github.com/en/actions/using-workflows/workflow-commands-for-github-actions#setting-an-environment-variable
+# See docs: https://docs.github.com/en/rest/reference/search#search-issues-and-pull-requests--parameters
+# If the issue exists we also set the `ISSUE_NUMBER` environment variable.
+
+PR_NUMBER=$(curl -s --request GET \
+  --url https://api.github.com/search/issues\?q=is:pull-request+is:open+repo:$REPO+in:title+$PR_TITLE \
+  --header "Authorization: token $GITHUB_TOKEN" | jq -r ".items[].number" | head -n 1);
+ISSUE_NUMBER=$(curl -s --request GET \
+  --url https://api.github.com/search/issues\?q=is:issue+is:open+repo:$REPO+in:title+$ISSUE_TITLE \
+  --header "Authorization: token $GITHUB_TOKEN" | jq -r ".items[].number" | head -n 1);
+echo "ISSUE_NUMBER=$ISSUE_NUMBER" >> $GITHUB_ENV;
+echo "ISSUE_EXISTS=$(if [[ $ISSUE_NUMBER ]]; then echo 'true'; else echo 'false'; fi)" >> $GITHUB_ENV;
+echo "PR_NUMBER=$PR_NUMBER" >> $GITHUB_ENV;
+echo "PR_EXISTS=$(if [[ $PR_NUMBER ]]; then echo 'true'; else echo 'false'; fi)" >> $GITHUB_ENV;