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import type { TriggerType } from '../config/schema.js';
import { SEVERITY_ORDER } from '../types/index.js';
import type { EventContext, Severity, SeverityThreshold, SkillReport } from '../types/index.js';
/** Maximum number of patterns to cache (LRU eviction when exceeded) */
const GLOB_CACHE_MAX_SIZE = 1000;
/** Cache for compiled glob patterns with LRU eviction */
const globCache = new Map<string, RegExp>();
/** Clear the glob cache (useful for testing) */
export function clearGlobCache(): void {
globCache.clear();
}
/** Get current cache size (useful for testing) */
export function getGlobCacheSize(): number {
return globCache.size;
}
/**
* Convert a glob pattern to a regex (cached with LRU eviction).
*/
function globToRegex(pattern: string): RegExp {
const cached = globCache.get(pattern);
if (cached) {
// Move to end for LRU ordering (delete and re-add)
globCache.delete(pattern);
globCache.set(pattern, cached);
return cached;
}
let regexPattern = '';
for (let index = 0; index < pattern.length; index++) {
const char = pattern[index];
const nextChar = pattern[index + 1];
const nextNextChar = pattern[index + 2];
Iif (char === undefined) {
break;
}
if (char === '*' && nextChar === '*' && nextNextChar === '/') {
regexPattern += '(?:.*/)?';
index += 2;
continue;
}
if (char === '*' && nextChar === '*') {
regexPattern += '.*';
index += 1;
continue;
}
if (char === '*') {
regexPattern += '[^/]*';
continue;
}
if (char === '?') {
regexPattern += '[^/]';
continue;
}
regexPattern += char.replace(/[.+^${}()|[\]\\]/g, '\\$&');
}
const regex = new RegExp(`^${regexPattern}$`);
// Evict oldest entry if cache is full
if (globCache.size >= GLOB_CACHE_MAX_SIZE) {
const oldestKey = globCache.keys().next().value;
Eif (oldestKey !== undefined) {
globCache.delete(oldestKey);
}
}
globCache.set(pattern, regex);
return regex;
}
/**
* Match a glob pattern against a file path.
* Supports ** for recursive matching and * for single directory matching.
*/
export function matchGlob(pattern: string, path: string): boolean {
return globToRegex(pattern).test(path);
}
/**
* Check if a file list matches the path filters.
* Returns true if paths match (or no filters), false if all files are excluded.
*/
function matchPathFilters(
filters: { paths?: string[]; ignorePaths?: string[] },
filenames: string[] | undefined
): boolean {
const { paths: pathPatterns, ignorePaths: ignorePatterns } = filters;
// Fail trigger match when path filters are defined but filenames unavailable
if ((pathPatterns || ignorePatterns) && (!filenames || filenames.length === 0)) {
return false;
}
if (pathPatterns && filenames) {
const hasMatch = filenames.some((file) =>
pathPatterns.some((pattern) => matchGlob(pattern, file))
);
if (!hasMatch) {
return false;
}
}
if (ignorePatterns && filenames) {
const allIgnored = filenames.every((file) =>
ignorePatterns.some((pattern) => matchGlob(pattern, file))
);
Eif (allIgnored) {
return false;
}
}
return true;
}
/**
* Return a copy of the context with only files matching the path filters.
* If no filters are set, returns the original context unchanged (no copy).
*/
export function filterContextByPaths(
context: EventContext,
filters: { paths?: string[]; ignorePaths?: string[] }
): EventContext {
const { paths: pathPatterns, ignorePaths: ignorePatterns } = filters;
// No filters — return original reference
if (!pathPatterns && !ignorePatterns) {
return context;
}
// No PR context — nothing to filter
if (!context.pullRequest) {
return context;
}
let files = context.pullRequest.files;
if (pathPatterns) {
files = files.filter((f) =>
pathPatterns.some((pattern) => matchGlob(pattern, f.filename))
);
}
if (ignorePatterns) {
files = files.filter(
(f) => !ignorePatterns.some((pattern) => matchGlob(pattern, f.filename))
);
}
return {
...context,
pullRequest: {
...context.pullRequest,
files,
},
};
}
/**
* Check if a trigger matches the given event context and environment.
*
* Trigger types:
* - '*' (wildcard): matches all environments, skips event/action checks
* - 'local': matches only when environment is 'local' (local-only skills)
* - 'pull_request': matches in 'github' (with event/action checks) and 'local' (path filters only)
* - 'schedule': matches when event is schedule
*/
export function matchTrigger(
trigger: ResolvedTrigger,
context: EventContext,
environment?: TriggerType | 'github'
): boolean {
// Wildcard triggers match everywhere, only check path filters
if (trigger.type === '*') {
const filenames = context.pullRequest?.files.map((f) => f.filename);
return matchPathFilters(trigger.filters, filenames);
}
// Type-based matching with early returns
if (trigger.type === 'local') {
if (environment !== 'local') {
return false;
}
}
if (trigger.type === 'pull_request') {
if (environment === 'local') {
// Local mode runs all skills — skip event/action checks, fall through to path filters
} else {
Iif (context.eventType !== 'pull_request') {
return false;
}
if (!trigger.actions?.includes(context.action)) {
return false;
}
}
}
if (trigger.type === 'schedule') {
Eif (context.eventType !== 'schedule') {
return false;
}
return (context.pullRequest?.files.length ?? 0) > 0;
}
// Apply path filters
const filenames = context.pullRequest?.files.map((f) => f.filename);
return matchPathFilters(trigger.filters, filenames);
}
/**
* Check if a report has any findings at or above the given severity threshold.
* Returns false if failOn is 'off' (disabled).
*/
export function shouldFail(report: SkillReport, failOn: SeverityThreshold): boolean {
Iif (failOn === 'off') return false;
const threshold = SEVERITY_ORDER[failOn];
return report.findings.some((f) => SEVERITY_ORDER[f.severity] <= threshold);
}
/**
* Count findings at or above the given severity threshold.
* Returns 0 if failOn is 'off' (disabled).
*/
export function countFindingsAtOrAbove(report: SkillReport, failOn: SeverityThreshold): number {
Iif (failOn === 'off') return 0;
const threshold = SEVERITY_ORDER[failOn];
return report.findings.filter((f) => SEVERITY_ORDER[f.severity] <= threshold).length;
}
/**
* Count findings of a specific severity across multiple reports.
*/
export function countSeverity(reports: SkillReport[], severity: Severity): number {
return reports.reduce(
(count, report) =>
count + report.findings.filter((f) => f.severity === severity).length,
0
);
}
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