`@expo/template-file` provides file-level variable substitution (Mustache template style).
npm install @expo/template-file@expo/template-file provides file-level variable substitution (Mustache template style).
``ts`
templateFile(templateFilePath: string, outputFilePath: string, envs: Record
`ts
import templateFile from '@expo/template-file';
await templateFile('abc.json.template', 'abc.json', { ABC: 123, XYZ: 789 });
`
abc.json.template file contents:`
{
"someKey": {{ ABC }},
"anotherKey": {{ XYZ }}
}
abc.json file should be created with the following contents:`json``
{
"someKey": 123,
"anotherKey": 789
}
https://github.com/expo/eas-build/tree/main/packages/template-file