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I’m creating a file template for a file with an extension that Xcode doesn’t recognise. Xcode doesn’t apply syntax highlighting to the file but I’d like it to. I would like Xcode to recognise the file as com.netscape.javascript-source even though the file extension isn’t .js (the file is actually jsonnet). I tried setting the AllowedTypes property of the TemplateInfo.plist to the UTI of JavaScript but that had no effect.

Alternatively, is it possible to define a new file extension for an existing UTI?

Indiana Kernick
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1 Answers1

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This question was answered on similar question.

It looks the only possible solution is to create a Cocoa Project that declares a new UTI.

Check those:

How to make XCode recognize a custom file extension as Objective-C for syntax highlighting?

Adding syntax coloring to Xcode for unknown file extension such as ".tcl"

IMike17
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