Added plugin logic

plugin.sh

@@ -0,0 +1,55 @@
+#!/bin/sh
+
+set -euo pipefail
+
+
+if [ "${PLUGIN_DOMAIN:-null}" = null ]; then
+    echo "No gitea domain provided";
+    exit 1;
+fi
+if [ "${PLUGIN_APIKEY:-null}" = null ]; then
+    echo "No api key provided";
+    exit 2;
+fi
+if [ "${PLUGIN_SOURCE:-null}" = null ]; then
+    echo "No source branch provided, falling back to branch that triggered ci";
+    exit 3;
+fi
+if [ "${PLUGIN_TARGET:-null}" = null ]; then
+    echo "No target branch provided";
+    exit 4;
+fi
+if [ "${PLUGIN_TITLE:-null}" = null ]; then
+    PLUGIN_TITLE="$PLUGIN_SOURCE -> $PLUGIN_TARGET";
+fi
+
+RES=$(curl --request POST \
+    --url "https://$PLUGIN_DOMAIN/api/v1/repos/$DRONE_REPO/pulls" \
+    --header "Content-Type: application/json" \
+    --header "Authorization: token $APIKEY" \
+    -F \
+    --data "{
+        \"title\": \"$PLUGIN_TITLE\",
+        \"body\": \"Automatic merge of $PLUGIN_SOURCE into $PLUGIN_TARGET\",
+        \"base\": \"$PLUGIN_TARGET\",
+        \"head\": \"$PLUGIN_SOURCE\"
+}")
+echo "PR created";
+
+if [ "${PLUGIN_MERGE:-false}" = true ]; then
+    if [ "${PLUGIN_DELETE_SOURCE:-null}" = null ]; then
+        echo "Falling back to not deleting source";
+        PLUGIN_DELETE_SOURCE=false;
+    fi
+    
+    curl --request POST \
+    --url "https://$PLUGIN_DOMAIN/api/v1/repos/$DRONE_REPO/pulls/$ID/merge" \
+    --header 'Content-Type: application/json' \
+    --header "Authorization: token $APIKEY" \
+    -F \
+    --data "{
+          \"do\": \"merge\",
+          \"delete_branch_after_merge\": $PLUGIN_DELETE_SOURCE
+    }"
+    echo "PR merged";
+fi