Also pass the caller option to loadPartialConfig

[hedgepigdaniel]

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Please check if the PR fulfills these requirements

• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
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What is the current behavior? (You can also link to an open issue here)

The caller option (added in #660) is passed to the transform function here:

babel-loader/src/transform.js

Line 10 in 8f240b4

result = await transform(source, injectCaller(options));

But it is not passed to the loadPartialConfig function here:

babel-loader/src/index.js

Line 121 in 8f240b4

const config = babel.loadPartialConfig(programmaticOptions);

This results in the caller option not being available in the project's babel.config.js

What is the new behavior?

The caller option is passed (subject to the existing compatibility check) in both cases.

Does this PR introduce a breaking change?

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• No

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Other information:

I'm not sure why it works for @babel/preset-env - I assume the presets referenced from babel.config.js get access to the option from the transform call rather than the loadPartialConfig call.

[loganfsmyth]

Ah great point. We actually don't need to pass it to transform at all in this case, so we can remove it from the transform file entirely. It'll stay in the result passed from loadPartialConfig so we don't need to set it again later.

[hedgepigdaniel]

Ah, yes that makes sense. I've put the injectCaller call in only one place now, before loadPartialConfig.

[loganfsmyth]

Thanks!