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Ignore empty arguments passed to externals (#1722)
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@ -116,6 +116,12 @@ fn run_with_stdin(
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let mut command_args = vec![];
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for arg in command.args.iter() {
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let value = evaluate_baseline_expr(arg, &context.registry, scope)?;
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// Skip any arguments that don't really exist, treating them as optional
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// FIXME: we may want to preserve the gap in the future, though it's hard to say
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// what value we would put in its place.
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if value.value.is_none() {
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continue;
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}
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// Do the cleanup that we need to do on any argument going out:
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let trimmed_value_string = value.as_string()?.trim_end_matches('\n').to_string();
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