Function getCompoundCommandPrefixesStatic

src/utils/bash/prefix.ts:135–175

(
  command: string,
  excludeSubcommand?: (subcommand: string) => boolean,
)

 *   commands that are already auto-allowed).
 */
export async function getCompoundCommandPrefixesStatic(
  command: string,
  excludeSubcommand?: (subcommand: string) => boolean,
): Promise<string[]> {
  const subcommands = splitCommand_DEPRECATED(command)
  if (subcommands.length <= 1) {
    const result = await getCommandPrefixStatic(command)
    return result?.commandPrefix ? [result.commandPrefix] : []
  }

  const prefixes: string[] = []
  for (const subcmd of subcommands) {
    const trimmed = subcmd.trim()
    if (excludeSubcommand?.(trimmed)) continue
    const result = await getCommandPrefixStatic(trimmed)
    if (result?.commandPrefix) {
      prefixes.push(result.commandPrefix)
    }
  }

  if (prefixes.length === 0) return []

  // Group prefixes by their first word (root command)
  const groups = new Map<string, string[]>()
  for (const prefix of prefixes) {
    const root = prefix.split(' ')[0]!
    const group = groups.get(root)
    if (group) {
      group.push(prefix)
    } else {
      groups.set(root, [prefix])
    }
  }

  // Collapse each group via word-aligned LCP
  const collapsed: string[] = []
  for (const [, group] of groups) {
    collapsed.push(longestCommonPrefix(group))
  }
  return collapsed
}

/**
 * Compute the longest common prefix of strings, aligned to word boundaries.