@netlify/plugin-edge-handlers/src/index.js

Netlify Build plugin to bundle Edge functions

const path = require("path");
const process = require("process");

const { isDirectory } = require("path-type");

const { LOCAL_OUT_DIR } = require("./consts");
const { assemble, bundleFunctions, logHandlers, publishBundle } = require("./lib");

module.exports = {
  onBuild: async ({ constants: { IS_LOCAL, NETLIFY_API_TOKEN, EDGE_HANDLERS_SRC }, utils }) => {
    if (!(await isDirectory(EDGE_HANDLERS_SRC))) {
      return utils.build.failBuild(`Edge Handlers directory does not exist: ${path.resolve(EDGE_HANDLERS_SRC)}`);
    }
    const { mainFile, handlers } = await assemble(EDGE_HANDLERS_SRC);

    if (handlers.length === 0) {
      console.log(`No Edge Handlers were found in ${EDGE_HANDLERS_SRC} directory`);
      return;
    }

    logHandlers(handlers, EDGE_HANDLERS_SRC);
    const bundle = await bundleFunctions(mainFile, utils);
    const uploaded = await publishBundle(bundle, handlers, LOCAL_OUT_DIR, IS_LOCAL, NETLIFY_API_TOKEN);

    if (!IS_LOCAL) {
      const summaryText = uploaded
        ? `${handlers.length} Edge Handlers deployed.`
        : `${handlers.length} Edge Handlers did not change.`;
      const logsLink = `https://app.netlify.com/sites/${process.env.SITE_NAME}/edge-handlers?scope=deployid:${process.env.DEPLOY_ID}`;

      utils.status.show({
        title: "Edge Handlers",
        summary: `${summaryText} [Watch Logs](${logsLink})`,
      });
    }
  },
};