publish.js

const aws = require("aws-sdk");
const fs = require("fs");
const mime = require("mime-types");
const path = require("path");
const project = require("./package.json");

aws.config.region = process.env.AWS_REGION || "us-west-2";
const artifactDir = process.env.ARTIFACT_DIR || "./dist";
const artifactName = process.env.ARTIFACT_NAME || project.name;
const artifactVersion = process.env.ARTIFACT_VERSION || project.version;
const s3Bucket = process.env.S3_BUCKET || "myuw-artifacts";
const s3Folder = `${artifactName}@${artifactVersion}`;

console.log(`${Date.now()} :: Starting upload`);
fs.readdir(artifactDir, (err, files) => {
  if (err) {
    console.log("Failed to read artifact directory", err);
    return;
  }
  if (!files || !files.length) {
    console.log(`'${artifactDir}' is empty, nothing to publish ☹`);
    return;
  }
  const s3 = new aws.S3();
  Promise.all(
    files.map(file =>
      s3
        .upload({
          Body: fs.createReadStream(`${artifactDir}/${file}`),
          Bucket: s3Bucket,
          ContentType: mime.lookup(file),
          Key: `${s3Folder}/${file}`,
        })
        .promise()
    )
  ).then(() => console.log(`${Date.now()} :: finished upload`));
});