[code-infra] The bundle size report have false position on MUI X commercial packages

[flaviendelangle]

Steps to reproduce

More context: https://mui-org.slack.com/archives/C042YB5RB3N/p1758277781152559

mui/mui-x#19625 only impacts the x-scheduler package but the CI shows changes on every commercial package:

@Janpot thinks that it is caused releaseInfo variable which changes based on the date-time of the build.

Current behavior

No response

Expected behavior

No response

Context

No response

Your environment

npx @mui/envinfo

  Don't forget to mention which browser you used.
  Output from `npx @mui/envinfo` goes here.

Search keywords: license, commercial, bundle size

[Janpot]

@Janpot thinks that it is caused releaseInfo variable which changes based on the date-time of the build.

The clues:

• non-gzipped shows no changes
• only pro/premium packages are affected. i.e. only the ones that have this variable included
• even happens when the only change is this variable as per https://frontend-public.mui.com/diff-package?package1=https://pkg.pr.new/mui/mui-x/@mui/x-data-grid-pro@74f8873&package2=https://pkg.pr.new/mui/mui-x/@mui/x-data-grid-pro@465b758

What we can do:

• Add thresholds or rounding to ignore small changes but I would rather not to
• Add mechanism to stabilize certain strings. Essentially enable the following:

  diff --git a/test/bundle-size/bundle-size-checker.config.mjs b/test/bundle-size/bundle-size-checker.config.mjs
  index 617db4610f..e6d658af09 100644
  --- a/test/bundle-size/bundle-size-checker.config.mjs
  +++ b/test/bundle-size/bundle-size-checker.config.mjs
  @@ -6,6 +6,8 @@
   import path from 'path';
   import glob from 'fast-glob';
   import { defineConfig } from '@mui/internal-bundle-size-checker';
  +// eslint-disable-next-line import/no-relative-packages
  +import generateReleaseInfo from '../../packages/x-license/generateReleaseInfo.js';
   
   const rootDir = path.resolve(import.meta.dirname, '../..');
   
  @@ -74,6 +76,9 @@ export default defineConfig(async () => {
         '@mui/x-tree-view-pro',
         ...treeViewProComponents,
       ],
  +    define: {
  +      [JSON.stringify(generateReleaseInfo())]: JSON.stringify('xxxxxxxxxxx'),
  +    },
       upload: !!process.env.CI,
       comment: false,
     };

  in the bundle size checker, we can just pass these straight to vite define option

[github-actions]

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