const recast = require('recast')
const types = recast.types
const builders = recast.types.builders
const scope = builders.identifier('scope')
const expression = `(
() => {
update({ message: "test" });
} )`
const ast = recast.parse(expression, {
sourceFileName: 'test.js',
})
// replace the scope of the identifiers found
types.visit(ast, {
visitIdentifier(path) {
path.replace(builders.memberExpression(
scope,
path.node,
false
))
return false
}
})
// crate a function
const result = builders.functionExpression(
null,
[scope],
builders.blockStatement([builders.returnStatement(
ast.program.body[0].expression
)])
)
// generate the output
const output = recast.print(result, {
sourceMapName: `source.map`
})
return output
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