Vite rolldown incompatibility with datadogVitePlugin

[mkonecny]

Describe what happened

Vite is planning to replace it's esbuild + rollup bundler system with a new rust-based "rolldown" bundler

https://vite.dev/guide/rolldown.html

When running a full vite build with telemetry enabled, and using this new Vite rolldown system (which advertises itself as a drop-in replacement), I get an error if telemetry is enabled

Steps to reproduce the issue:

vite config:

      datadogVitePlugin({
        disableGit: true,
        auth: {
          apiKey: DATADOG_API_KEY,
        },
        rum: {
          sourcemaps: {
            bailOnError: true,
            releaseVersion: `app@${GIT_COMMIT}.vite`,
            service: 'x',
            minifiedPathPrefix: '/static',
          },
        },
        telemetry: {
          disabled: false, // setting this to "true" fixes the error
        },
      })

and the run yarn vite build

Expected behaviour:

Build should complete successfully

Actual behaviour:

[error] error during build:
TypeError: Expected a finite number, got undefined: undefined
    at module.exports (/Users/mkonecny/app/node_modules/pretty-bytes/index.js:70:9)
    at file:///Users/mkonecny/app/node_modules/@datadog/vite-plugin/dist/src/index.mjs:12:13427
    at Array.map (<anonymous>)
    at file:///Users/mkonecny/app/node_modules/@datadog/vite-plugin/dist/src/index.mjs:12:13399
    at Oe (file:///Users/mkonecny/app/node_modules/@datadog/vite-plugin/dist/src/index.mjs:12:13552)
    at d (file:///Users/mkonecny/app/node_modules/@datadog/vite-plugin/dist/src/index.mjs:12:21611)
    at async buildReport (file:///Users/mkonecny/app/node_modules/@datadog/vite-plugin/dist/src/index.mjs:12:22607)
    at async Promise.all (index 0)
    at async PluginContextImpl.closeBundle (file:///Users/mkonecny/app/node_modules/@datadog/vite-plugin/dist/src/index.mjs:12:32686)
    at async plugin (file:///Users/mkonecny/app/node_modules/rolldown/dist/shared/src-Chn1S4O2.mjs:3167:4)
    at async plugin.<computed> (file:///Users/mkonecny/app/node_modules/rolldown/dist/shared/src-Chn1S4O2.mjs:3417:12)
error Command failed with exit code 1.

Additional context

Latest Vite rolldown (7.1.5)
@datadog/vite-plugin 2.6.4

[yoannmoinet]

Interesting.
Thank you for your detailed report.
I'll have a look later this week.
It doesn't sound too complicated.

[yoannmoinet]

Something fishy is happening in this file.
Some reports might be empty with rolldown.

[yoannmoinet]

Sorry for the delays, I've been pretty swamped lately, I'll try to address this asap.