Function subcommandCompletions

packages/cli/src/internal/commandDescriptor.ts:1183–1197

(conditionals: ReadonlyArray<string>)

        )
      )
    const subcommandCompletions = (conditionals: ReadonlyArray<string>) =>
      Arr.map(info.subcommands, ([name, subcommand]) => {
        const description = getShortDescription(subcommand)
        return pipe(
          baseTemplate,
          Arr.appendAll(conditionals),
          Arr.appendAll(Arr.make("-f", "-a", `"${name}"`)),
          Arr.appendAll(
            description.length === 0
              ? Arr.empty()
              : Arr.make("-d", `'${description}'`)
          ),
          Arr.join(" ")
        )
      })
    // If parent commands are empty, then the info is for the root command
    if (Arr.isEmptyReadonlyArray(info.parentCommands)) {
      const conditionals = Arr.make("-n", "\"__fish_use_subcommand\"")