Bulk change default app on macOS for code file extensions

change.sh

swift - <<'EOF'
import AppKit
import UniformTypeIdentifiers

let bundle = "com.microsoft.VSCode"
let exts = ["c","h","rs","go","ts","js","json","yaml","toml","md","sh","py","swift","css"]

for ext in exts {
    guard let uti = UTType(filenameExtension: ext)?.identifier else { continue }
    let before = LSCopyDefaultRoleHandlerForContentType(uti as CFString, .all)?.takeRetainedValue() ?? "none" as CFString
    LSSetDefaultRoleHandlerForContentType(uti as CFString, .all, bundle as CFString)
    let after = LSCopyDefaultRoleHandlerForContentType(uti as CFString, .all)?.takeRetainedValue() ?? "none" as CFString
    print(".\(ext.padding(toLength:8,withPad:" ",startingAt:0)) \(before) -> \(after)")
}
EOF