chore(regex): add additional logging for isValidDependency failures (…

…#29791)

lib/modules/manager/custom/regex/strategies.ts

@@ -1,4 +1,5 @@
 import is from '@sindresorhus/is';
+import { logger } from '../../../../logger';
 import { regEx } from '../../../../util/regex';
 import type { PackageDependency } from '../../types';
 import type { RecursionParameter, RegexManagerConfig } from './types';
@@ -12,7 +13,7 @@ import {
 
 export function handleAny(
   content: string,
-  _packageFile: string,
+  packageFile: string,
   config: RegexManagerConfig,
 ): PackageDependency[] {
   return config.matchStrings
@@ -30,12 +31,14 @@ export function handleAny(
       ),
     )
     .filter(is.truthy)
-    .filter(isValidDependency);
+    .filter((dep: PackageDependency) =>
+      checkIsValidDependency(dep, packageFile),
+    );
 }
 
 export function handleCombination(
   content: string,
-  _packageFile: string,
+  packageFile: string,
   config: RegexManagerConfig,
 ): PackageDependency[] {
   const matches = config.matchStrings
@@ -57,7 +60,9 @@ export function handleCombination(
     .reduce((base, addition) => mergeExtractionTemplate(base, addition));
   return [createDependency(extraction, config)]
     .filter(is.truthy)
-    .filter(isValidDependency);
+    .filter((dep: PackageDependency) =>
+      checkIsValidDependency(dep, packageFile),
+    );
 }
 
 export function handleRecursive(
@@ -78,7 +83,9 @@ export function handleRecursive(
     regexes,
   })
     .filter(is.truthy)
-    .filter(isValidDependency);
+    .filter((dep: PackageDependency) =>
+      checkIsValidDependency(dep, packageFile),
+    );
 }
 
 function processRecursive(parameters: RecursionParameter): PackageDependency[] {
@@ -109,3 +116,23 @@ function processRecursive(parameters: RecursionParameter): PackageDependency[] {
     });
   });
 }
+
+function checkIsValidDependency(
+  dep: PackageDependency,
+  packageFile: string,
+): boolean {
+  const isValid = isValidDependency(dep);
+  if (!isValid) {
+    const meta = {
+      packageDependency: dep,
+      packageFile,
+    };
+    logger.trace(
+      meta,
+      'Discovered a package dependency by matching regex, but it did not pass validation. Discarding',
+    );
+    return isValid;
+  }
+
+  return isValid;
+}