Question: Are `packageFiles` in .versionrc not bumped automatically?

[zaki-yama]

I'd like to ask you about the expected behavior.

Background

Now I have an manifest.json file under dist directory.

<root>
- dist/
  - manifest.json
- package.json
- .versionrc.js

I'd like to sync versions in both package.json and dist/manifest.json, so I added dist/manifest.json to packageFiles in .versionrc.js.

module.exports = {
  packageFiles: [
    {
      filename: "dist/manifest.json",
      type: "json"
    }
  ],
};

Problem

I ran standard-version (with --dry-run option), but it seems to bump up only package.json and package-lock.json.

$ npx standard-version --dry-run 
✔ bumping version in package.json from 1.0.0 to 1.0.1
✔ bumping version in package-lock.json from 1.0.0 to 1.0.1
✔ created CHANGELOG.md
✔ outputting changes to CHANGELOG.md

Question

Is that the expected behavior?
In README,

packageFiles – User-defined files where versions can be read from and be "bumped".

I couldn't quite understand what "and be "bumped"" meant.
And default packageFiles are bumped because they are merged into bumpFiles.

Workaround

I can bump up by moving dist/manifest.json to bumpFiles.
But I had to contain package.json too (because it overwrote the default values).

module.exports = {
  bumpFiles: [
    {
      filename: "package.json",
      type: "json"
    },
    {
      filename: "dist/manifest.json",
      type: "json"
    }
  ]
};

[jbottigliero]

Hey @zaki-yama, thanks for the thorough write-up. Your observations seem correct – it looks like we're currently not merging the packageFiles configuration with bumpFiles, we're only doing this when you don't provide packageFiles value. This seems like unexpected behavior to me... and the behavior described in the README is the intended functionality.

Your workaround is valid for now, just consider that without a packageFile option like you had previously the version will be read from one of the available default files (in your case probably package.json).

[zaki-yama]

@jbottigliero
Thank you very much for your quick response!