Send entire cloudwatch logs to slack when aws codebuild is finished – Amazon Web Sevices

I have created a lambda function that send codebuild cloudwatch logs to slack. Its working but everytime the logs is generated while codebuild is running. It is throwing messages to slack like a spam.

I would want to send entire codebuild logs only once when the codebuild is finished.

I am not sure how to add trigger because in lambda I used cloudwatch trigger for lambda to work.

Nodejs Lambda function

const zlib = require("zlib");
const https = require("https");
const SLACK_ENDPOINT ="/services/000000000000000000000000000000000000"
const SLACK_BOT = "deploy-notifications";

function doRequest(content) {
  // formatting the message according Slack API
  const payload = {
    username: SLACK_BOT,
    blocks: [
      {
        type: "header",
        text: {
          type: "plain_text",
          text: "Whoops, looks like something went wrong 😞🤕",
          emoji: true,
        },
      },
      {
        type: "section",
        fields: [
          {
            type: "mrkdwn",
            text: "<!here> the API is running into an issue",
          },
        ],
      },
      {
        type: "section",
        fields: [
          {
            type: "mrkdwn",
            text: "*Environment: * Production",
          },
        ],
      },
      {
        type: "section",
        fields: [
          {
            type: "mrkdwn",
            text: "*Message:* _" + content.message + "_",
          },
        ],
      },
      {
        type: "section",
        fields: [
          {
            type: "mrkdwn",
            text: "*Stacktrace:*",
          },
        ],
      },
      {
        type: "section",
        text: {
          type: "mrkdwn",
          text:
            "```" +
            JSON.stringify(content.original ? content.original : content) +
            "```",
        },
      },
      {
        type: "divider",
      },
    ],
  };

  const payloadStr = JSON.stringify(payload);
  const options = {
    hostname: "hooks.slack.com",
    port: 443,
    path: SLACK_ENDPOINT,
    channel: "#deploy-notifications",
    method: "POST",
    headers: {
      "Content-Type": "application/json",
      "Content-Length": Buffer.byteLength(payloadStr),
    },
  };

  const postReq = https.request(options, function (res) {
    const chunks = [];
    res.setEncoding("utf8");
    res.on("data", function (chunk) {
      return chunks.push(chunk);
    });
    res.on("end", function () {
      if (res.statusCode < 400) {
        console.log("sent!!!");
      } else if (res.statusCode < 500) {
        console.error(
          "Error posting message to Slack API: " +
            res.statusCode +
            " - " +
            res.statusMessage
        );
      } else {
        console.error(
          "Server error when processing message: " +
            res.statusCode +
            " - " +
            res.statusMessage
        );
      }
    });
    return res;
  });
  postReq.write(payloadStr);
  postReq.end();
}

function main(event, context) {
  context.callbackWaitsForEmptyEventLoop = true;
  // always returns the last event
  const payload = Buffer.from(event.awslogs.data, "base64");
  const log = JSON.parse(zlib.gunzipSync(payload).toString("utf8"));
  // the log is an object that contains an array of events called `logEvents` and we need access it bypassing the index 0
  doRequest(log.logEvents[0]);
  const response = {
    statusCode: 200,
    body: JSON.stringify("Event sent to Slack!"),
  };
  return response;
}

exports.handler = main;