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import func Foundation.exit
var arguments = CommandLine.arguments
struct Subcommand {
let name: String
let description: String
let handler: ([String]) throws -> Void
}
func main() throws {
let subcommands: [Subcommand] = [
Subcommand(name: "vmgen", description: "Generate internal instruction code", handler: VMGen.main),
Subcommand(name: "wasmgen", description: "Generate wasm instruction code", handler: WasmGen.main),
]
func printAvailableSubcommands() {
print("Available subcommands:")
for subcommand in subcommands {
print(" \(subcommand.name): \(subcommand.description)")
}
}
guard arguments.count > 1 else {
for subcommand in subcommands {
try subcommand.handler([subcommand.name])
}
return
}
let subcommandName = arguments[1]
guard let subcommand = subcommands.first(where: { $0.name == subcommandName }) else {
print("Unknown subcommand: \(subcommandName)")
printAvailableSubcommands()
exit(1)
}
try subcommand.handler(Array(arguments.dropFirst(1)))
}
try main()
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