Wrapping Long-Running Go Functions with a Single Call
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Every CLI tool eventually needs the same thing: show the user that something is happening, print progress, and clean up the output when it's done. The straightforward approach — scattered fmt.Printf calls around your business logic — works until you need it to look good in a real terminal, be silent in CI, and emit OpenTelemetry spans in production. Then it stops scaling. This post walks through a pattern for wrapping long-running functions in Go so all of that comes for free. The cor