fix: add more trace logging when searching for latest release version (…

…#1922)

src/manifest.ts

@@ -1490,6 +1490,9 @@ async function latestReleaseVersion(
     commitShas.add(commitWithPullRequest.sha);
     const mergedPullRequest = commitWithPullRequest.pullRequest;
     if (!mergedPullRequest) {
+      logger.trace(
+        `skipping commit: ${commitWithPullRequest.sha} missing merged pull request`
+      );
       continue;
     }
 
@@ -1498,12 +1501,20 @@ async function latestReleaseVersion(
       logger
     );
     if (!branchName) {
+      logger.trace(
+        `skipping commit: ${commitWithPullRequest.sha} unrecognized branch name: ${mergedPullRequest.headBranchName}`
+      );
       continue;
     }
 
     // If branchPrefix is specified, ensure it is found in the branch name.
     // If branchPrefix is not specified, component should also be undefined.
     if (branchName.getComponent() !== branchPrefix) {
+      logger.trace(
+        `skipping commit: ${
+          commitWithPullRequest.sha
+        } branch component ${branchName.getComponent()} doesn't match expected prefix: ${branchPrefix}`
+      );
       continue;
     }
 
@@ -1513,6 +1524,9 @@ async function latestReleaseVersion(
       logger
     );
     if (!pullRequestTitle) {
+      logger.trace(
+        `skipping commit: ${commitWithPullRequest.sha} couldn't parse pull request title: ${mergedPullRequest.title}`
+      );
       continue;
     }