CI: update changelog generator to use compare API (grafana#99688)

update changelog generator to use compare API

.github/workflows/actions/changelog/index.js

@@ -69,8 +69,17 @@ const graphql = async (ghtoken, query, variables) => {
     },
     body: JSON.stringify({ query, variables }),
   });
-  const { data } = await results.json();
-  return data;
+
+  const res = await results.json();
+
+  LOG(
+    JSON.stringify({
+      status: results.status,
+      text: results.statusText,
+    })
+  );
+
+  return res.data;
 };
 
 // Using Github GraphQL API find the timestamp for the given tag/commit hash.
@@ -99,20 +108,20 @@ const getCommitishDate = async (name, owner, target) => {
 // Using Github GraphQL API get a list of PRs between the two "commitish" items.
 // This resoves the "since" item's timestamp first and iterates over all PRs
 // till "target" using naïve pagination.
-const getHistory = async (name, owner, target, sinceDate) => {
-  LOG(`Fetching ${owner}/${name} PRs since ${sinceDate} till ${target}`);
+const getHistory = async (name, owner, from, to) => {
+  LOG(`Fetching ${owner}/${name} PRs between ${from} and ${to}`);
   const query = `
   query findCommitsWithAssociatedPullRequests(
     $name: String!
     $owner: String!
-    $target: String!
-    $sinceDate: GitTimestamp
+    $from: String!
+    $to: String!
     $cursor: String
   ) {
     repository(name: $name, owner: $owner) {
-      object(expression: $target) {
-        ... on Commit {
-          history(first: 50, since: $sinceDate, after: $cursor) {
+      ref(qualifiedName: $from) {
+        compare(headRef: $to) {
+          commits(first: 25, after: $cursor) {
             totalCount
             pageInfo {
               hasNextPage
@@ -155,13 +164,13 @@ const getHistory = async (name, owner, target, sinceDate) => {
     const result = await graphql(ghtoken, query, {
       name,
       owner,
-      target,
-      sinceDate,
+      from,
+      to,
       cursor,
     });
     LOG(`GraphQL: ${JSON.stringify(result)}`);
-    nodes = [...nodes, ...result.repository.object.history.nodes];
-    const { hasNextPage, endCursor } = result.repository.object.history.pageInfo;
+    nodes = [...nodes, ...result.repository.ref.compare.commits.nodes];
+    const { hasNextPage, endCursor } = result.repository.ref.compare.commits.pageInfo;
     if (!hasNextPage) {
       break;
     }
@@ -175,11 +184,11 @@ const getHistory = async (name, owner, target, sinceDate) => {
 // feature, deprecation, breaking change and plugin fixes/enhancements).
 //
 // PR grouping relies on Github labels only, not on the PR contents.
-const getChangeLogItems = async (name, owner, sinceDate, to) => {
+const getChangeLogItems = async (name, owner, from, to) => {
   // check if a node contains a certain label
   const hasLabel = ({ labels }, label) => labels.nodes.some(({ name }) => name === label);
   // get all the PRs between the two "commitish" items
-  const history = await getHistory(name, owner, to, sinceDate);
+  const history = await getHistory(name, owner, from, to);
 
   const items = history.flatMap((node) => {
     // discard PRs without a "changelog" label
@@ -231,13 +240,10 @@ const previous = process.argv[3] || process.env.INPUT_PREVIOUS || (await getPrev
 
 LOG(`Previous tag/commit: ${previous}`);
 
-const sinceDate = await getCommitishDate('grafana', 'grafana', previous);
-LOG(`Previous tag/commit timestamp: ${sinceDate}`);
-
 // Get all changelog items from Grafana OSS
-const oss = await getChangeLogItems('grafana', 'grafana', sinceDate, target);
+const oss = await getChangeLogItems('grafana', 'grafana', previous, target);
 // Get all changelog items from Grafana Enterprise
-const entr = await getChangeLogItems('grafana-enterprise', 'grafana', sinceDate, target);
+const entr = await getChangeLogItems('grafana-enterprise', 'grafana', previous, target);
 
 LOG(`Found OSS PRs: ${oss.length}`);
 LOG(`Found Enterprise PRs: ${entr.length}`);