Add debug logging and extract glob pattern helper module for repo-memory validation (#8242)

Author: Copilot

actions/setup/js/glob_pattern_helpers.cjs

@@ -0,0 +1,70 @@
+// @ts-check
+
+/**
+ * Convert a glob pattern to a RegExp
+ * @param {string} pattern - Glob pattern (e.g., "*.json", "metrics/**", "data/**\/*.csv")
+ * @returns {RegExp} - Regular expression that matches the pattern
+ *
+ * Supports:
+ * - * matches any characters except /
+ * - ** matches any characters including /
+ * - . is escaped to match literal dots
+ * - \ is escaped properly
+ *
+ * @example
+ * const regex = globPatternToRegex("*.json");
+ * regex.test("file.json"); // true
+ * regex.test("file.txt"); // false
+ *
+ * @example
+ * const regex = globPatternToRegex("metrics/**");
+ * regex.test("metrics/data.json"); // true
+ * regex.test("metrics/daily/data.json"); // true
+ */
+function globPatternToRegex(pattern) {
+  // Convert glob pattern to regex that supports directory wildcards
+  // ** matches any path segment (including /)
+  // * matches any characters except /
+  let regexPattern = pattern
+    .replace(/\\/g, "\\\\") // Escape backslashes
+    .replace(/\./g, "\\.") // Escape dots
+    .replace(/\*\*/g, "<!DOUBLESTAR>") // Temporarily replace **
+    .replace(/\*/g, "[^/]*") // Single * matches non-slash chars
+    .replace(/<!DOUBLESTAR>/g, ".*"); // ** matches everything including /
+  return new RegExp(`^${regexPattern}$`);
+}
+
+/**
+ * Parse a space-separated list of glob patterns into RegExp objects
+ * @param {string} fileGlobFilter - Space-separated glob patterns (e.g., "*.json *.jsonl *.csv *.md")
+ * @returns {RegExp[]} - Array of regular expressions
+ *
+ * @example
+ * const patterns = parseGlobPatterns("*.json *.jsonl");
+ * patterns[0].test("file.json"); // true
+ * patterns[1].test("file.jsonl"); // true
+ */
+function parseGlobPatterns(fileGlobFilter) {
+  return fileGlobFilter.trim().split(/\s+/).filter(Boolean).map(globPatternToRegex);
+}
+
+/**
+ * Check if a file path matches any of the provided glob patterns
+ * @param {string} filePath - File path to test (e.g., "data/file.json")
+ * @param {string} fileGlobFilter - Space-separated glob patterns
+ * @returns {boolean} - True if the file matches at least one pattern
+ *
+ * @example
+ * matchesGlobPattern("file.json", "*.json *.jsonl"); // true
+ * matchesGlobPattern("file.txt", "*.json *.jsonl"); // false
+ */
+function matchesGlobPattern(filePath, fileGlobFilter) {
+  const patterns = parseGlobPatterns(fileGlobFilter);
+  return patterns.some(pattern => pattern.test(filePath));
+}
+
+module.exports = {
+  globPatternToRegex,
+  parseGlobPatterns,
+  matchesGlobPattern,
+};