feat(close-pr-support): Enable commit detection when tag search fails by failing back to looking at commits in closed & merged PR

Author: David Murphy

src/action.ts

@@ -122,6 +122,7 @@ export default async function main() {
     core.setOutput('previous_tag', previousTag.name);
 
     commits = await getCommits(previousTag.commit.sha, commitRef);
+    core.debug("We found "+ commits.length +" commits to consider!");
 
     let bump = await analyzeCommits(
       {

src/utils.ts

@@ -5,6 +5,7 @@ import DEFAULT_RELEASE_TYPES from '@semantic-release/commit-analyzer/lib/default
 import { compareCommits, listTags } from './github';
 import { defaultChangelogRules } from './defaults';
 import { Await } from './ts';
+import {context} from "@actions/github";
 
 type Tags = Await<ReturnType<typeof listTags>>;
 
@@ -30,19 +31,53 @@ export async function getValidTags(
 
   return validTags;
 }
+interface FinalCommit {
+    sha: string | null;
+    commit: {
+        message: string;
+    }
+}
+
 
 export async function getCommits(
-  baseRef: string,
-  headRef: string
+    baseRef: string,
+    headRef: string
 ): Promise<{ message: string; hash: string | null }[]> {
-  const commits = await compareCommits(baseRef, headRef);
-
-  return commits
-    .filter((commit) => !!commit.commit.message)
-    .map((commit) => ({
-      message: commit.commit.message,
-      hash: commit.sha,
-    }));
+    let commits: Array<FinalCommit>;
+    commits = await compareCommits(baseRef, headRef);
+    core.info("We found " + commits.length + " commits using classic compare!")
+    if (commits.length < 1) {
+        core.info("We did not find enough commits, attempting to scan closed PR method.")
+        commits = getClosedPRCommits();
+    }
+    if (commits.length == 0) {
+        return []
+    }
+
+    return commits
+        .filter((commit: FinalCommit) => !!commit.commit.message)
+        .map((commit: FinalCommit) => ({
+            message: commit.commit.message,
+            hash: commit.sha,
+        }))
+}
+
+function getClosedPRCommits(){
+    let commits = Array<FinalCommit>();
+    if( !('pull_request' in context.payload)){
+        core.debug("We are in a closed PR context continuing.");
+        core.debug(JSON.stringify(context.payload.commits))
+        let pr_commit_count = context.payload.commits.length
+        core.info("We found "+pr_commit_count+" commits from the Closed PR method.")
+        commits = context.payload.commits
+        .filter((commit: FinalCommit) => !!commit.commit.message)
+        .filter((commit: FinalCommit) => ({
+            message: commit.commit.message,
+            hash: commit.sha,
+        }));
+        core.debug("After processing we are going to present " + commits.length + " commits!")
+    }
+    return commits;
 }
 
 export function getBranchFromRef(ref: string) {