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fix(python): propagate [<EntryPoint>] return value as process exit code #4763

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Merged
dbrattli merged 1 commit into from
Jul 11, 2026
Merged

fix(python): propagate [<EntryPoint>] return value as process exit code #4763

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9 changes: 8 additions & 1 deletion src/Fable.Transforms/Python/Fable2Python.Transforms.fs
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Original file line number Diff line number Diff line change
Expand Up @@ -3216,7 +3216,14 @@ let declareEntryPoint (com: IPythonCompiler) (ctx: Context) (funcExpr: Expressio
[ Expression.stringConstant "__main__" ]
)

let main = Expression.call (funcExpr, [ args ]) |> Statement.expr |> List.singleton
let mainCall = Expression.call (funcExpr, [ args ])

// Propagate the entry point's return value as the process exit code.
// int(...) coercion is required because fable-library-python's Int32 is not an int subclass.
let main =
emitExpression None "sys.exit(int($0))" [ mainCall ]
|> Statement.expr
|> List.singleton

Statement.if' (test, main)

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