d2542c9a62
Squash the current repository state back into one baseline commit while preserving the README reframing and repository contents. Constraint: User explicitly requested a single squashed commit with subject "asdf" Confidence: high Scope-risk: broad Reversibility: clean Directive: This commit intentionally rewrites published history; coordinate before future force-pushes Tested: git status clean; local history rewritten to one commit; force-pushed main to origin and instructkr Not-tested: Fresh clone verification after push
120 lines
3.4 KiB
TypeScript
120 lines
3.4 KiB
TypeScript
import { getHistory } from '../../history.js'
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import { logForDebugging } from '../debug.js'
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/**
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* Result of shell history completion lookup
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*/
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export type ShellHistoryMatch = {
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/** The full command from history */
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fullCommand: string
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/** The suffix to display as ghost text (the part after user's input) */
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suffix: string
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}
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// Cache for shell history commands to avoid repeated async reads
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// History only changes when user submits a command, so a long TTL is fine
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let shellHistoryCache: string[] | null = null
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let shellHistoryCacheTimestamp = 0
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const CACHE_TTL_MS = 60000 // 60 seconds - history won't change while typing
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/**
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* Get shell commands from history, with caching
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*/
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async function getShellHistoryCommands(): Promise<string[]> {
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const now = Date.now()
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// Return cached result if still fresh
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if (shellHistoryCache && now - shellHistoryCacheTimestamp < CACHE_TTL_MS) {
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return shellHistoryCache
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}
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const commands: string[] = []
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const seen = new Set<string>()
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try {
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// Read history entries and filter for bash commands
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for await (const entry of getHistory()) {
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if (entry.display && entry.display.startsWith('!')) {
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// Remove the '!' prefix to get the actual command
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const command = entry.display.slice(1).trim()
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if (command && !seen.has(command)) {
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seen.add(command)
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commands.push(command)
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}
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}
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// Limit to 50 most recent unique commands
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if (commands.length >= 50) {
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break
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}
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}
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} catch (error) {
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logForDebugging(`Failed to read shell history: ${error}`)
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}
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shellHistoryCache = commands
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shellHistoryCacheTimestamp = now
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return commands
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}
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/**
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* Clear the shell history cache (useful when history is updated)
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*/
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export function clearShellHistoryCache(): void {
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shellHistoryCache = null
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shellHistoryCacheTimestamp = 0
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}
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/**
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* Add a command to the front of the shell history cache without
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* flushing the entire cache. If the command already exists in the
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* cache it is moved to the front (deduped). When the cache hasn't
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* been populated yet this is a no-op – the next lookup will read
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* the full history which already includes the new command.
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*/
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export function prependToShellHistoryCache(command: string): void {
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if (!shellHistoryCache) {
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return
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}
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const idx = shellHistoryCache.indexOf(command)
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if (idx !== -1) {
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shellHistoryCache.splice(idx, 1)
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}
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shellHistoryCache.unshift(command)
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}
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/**
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* Find the best matching shell command from history for the given input
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*
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* @param input The current user input (without '!' prefix)
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* @returns The best match, or null if no match found
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*/
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export async function getShellHistoryCompletion(
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input: string,
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): Promise<ShellHistoryMatch | null> {
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// Don't suggest for empty or very short input
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if (!input || input.length < 2) {
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return null
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}
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// Check the trimmed input to make sure there's actual content
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const trimmedInput = input.trim()
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if (!trimmedInput) {
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return null
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}
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const commands = await getShellHistoryCommands()
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// Find the first command that starts with the EXACT input (including spaces)
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// This ensures "ls " matches "ls -lah" but "ls " (2 spaces) does not
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for (const command of commands) {
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if (command.startsWith(input) && command !== input) {
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return {
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fullCommand: command,
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suffix: command.slice(input.length),
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}
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}
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}
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return null
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}
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