50 lines
2.1 KiB
TypeScript
50 lines
2.1 KiB
TypeScript
|
/**
|
||
|
|
* The matcher primitive shared by both hook dialects: decide whether a matcher
|
||
|
|
* pattern selects a given query (a tool name, a session source, …).
|
||
|
|
*
|
||
|
|
* The two dialects differ ONLY in how a non-empty pattern is interpreted, so
|
||
|
|
* that single axis is the {@link MatcherMode} parameter:
|
||
|
|
* - `claude`: a pattern of purely `[A-Za-z0-9_|]+` is a LITERAL (pipe =
|
||
|
|
* exact-match alternation, e.g. `Edit|Write`); anything else is a regex.
|
||
|
|
* - `codex`: every pattern is an unanchored regex (no literal fast path).
|
||
|
|
*
|
||
|
|
* Both treat an absent / empty / `'*'` pattern as match-all, and both treat an
|
||
|
|
* invalid regex as a non-match (the bridge logs it; a broken matcher must not
|
||
|
|
* throw into the loop).
|
||
|
|
*
|
||
|
|
* @module @deepseek-ai/dsh-hook-protocol/matcher
|
||
|
|
*/
|
||
|
|
|
||
|
|
import type { MatcherMode } from './types.ts'
|
||
|
|
|
||
|
|
/** True for an absent / empty / `'*'` pattern — the match-all sentinels. */
|
||
|
|
function isMatchAll(matcher: string | undefined): boolean {
|
||
|
|
return matcher === undefined || matcher === '' || matcher === '*'
|
||
|
|
}
|
||
|
|
|
||
|
|
/** A Claude-literal pattern is purely word chars + `|` (the regex-vs-literal discriminator). */
|
||
|
|
const CLAUDE_LITERAL = /^[A-Za-z0-9_|]+$/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Whether `matcher` selects `query` under the given dialect {@link MatcherMode}.
|
||
|
|
* Match-all sentinels (absent/`''`/`'*'`) always match. A `claude` literal
|
||
|
|
* pattern exact-matches the query (splitting `|` into alternatives); every other
|
||
|
|
* `claude` pattern and ALL `codex` patterns are tested as an unanchored regex.
|
||
|
|
* An invalid regex matches nothing (never throws).
|
||
|
|
*/
|
||
|
|
export function matchesMatcher(matcher: string | undefined, query: string, mode: MatcherMode): boolean {
|
||
|
|
if (isMatchAll(matcher)) return true
|
||
|
|
// matcher is a non-empty string past the match-all guard.
|
||
|
|
const pattern = matcher as string
|
||
|
|
if (mode === 'claude' && CLAUDE_LITERAL.test(pattern)) {
|
||
|
|
return pattern.split('|').includes(query)
|
||
|
|
}
|
||
|
|
try {
|
||
|
|
return new RegExp(pattern).test(query)
|
||
|
|
} catch {
|
||
|
|
// Invalid regex: a broken matcher selects nothing rather than throwing into
|
||
|
|
// the agent loop. The bridge is responsible for surfacing the bad config.
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
}
|