- add additional settings to ensure we won't spend the whole API quota if a merge included non anticipated commits

src/configuration.ts

@@ -1,4 +1,8 @@
 export interface Configuration {
+  max_tags_to_fetch: number,
+  max_pull_requests: number,
+  max_back_track_time_days: number,
+  exclude_merge_branches: string[],
   sort: string
   template: string
   pr_template: string
@@ -18,10 +22,14 @@ export interface Transformer {
 }
 
 export const DefaultConfiguration: Configuration = {
-  sort: 'ASC',
-  template: '${{CHANGELOG}}',
-  pr_template: '- ${{TITLE}}\n   - PR: #${{NUMBER}}',
-  empty_template: '- no changes',
-  categories: [],
-  transformers: []
+  max_tags_to_fetch: 200, // the amount of tags to fetch from the github API
+  max_pull_requests: 200, // the amount of pull requests to process
+  max_back_track_time_days: 90, // allow max of 90 days to check up on pull requests
+  exclude_merge_branches: [], // branches to exclude from counting as PRs (e.g. YourOrg/qa, YourOrg/main)
+  sort: 'ASC', // sorting order for filling the changelog (ASC or DESC) supported
+  template: '${{CHANGELOG}}', // the global template to host the changelog
+  pr_template: '- ${{TITLE}}\n   - PR: #${{NUMBER}}', // the per PR template to pick
+  empty_template: '- no changes', // the template to use if no pull requests are found
+  categories: [], // the categories to support for the ordering
+  transformers: []  // transformers to apply on the PR description according to the `pr_template`
 }

src/pullRequests.ts

@@ -52,7 +52,8 @@ export class PullRequests {
     owner: string,
     repo: string,
     fromDate: moment.Moment,
-    toDate: moment.Moment // eslint-disable-line @typescript-eslint/no-unused-vars
+    toDate: moment.Moment, // eslint-disable-line @typescript-eslint/no-unused-vars
+    maxPullRequests: number
   ): Promise<PullRequestInfo[]> {
     const mergedPRs: PullRequestInfo[] = []
     const options = this.octokit.pulls.list.endpoint.merge({
@@ -83,7 +84,11 @@ export class PullRequests {
       }
 
       const firstPR = prs[0]
-      if (firstPR.merged_at && fromDate.isAfter(moment(firstPR.merged_at))) {
+      if (firstPR.merged_at && fromDate.isAfter(moment(firstPR.merged_at)) || mergedPRs.length >= maxPullRequests) {
+        if( mergedPRs.length >= maxPullRequests ) {
+          core.info(`Reached 'maxPullRequests' count ${maxPullRequests}`)
+        }
+      
         // bail out early to not keep iterating on PRs super old
         return sortPullRequests(mergedPRs, true)
       }
@@ -92,11 +97,24 @@ export class PullRequests {
     return sortPullRequests(mergedPRs, true)
   }
 
-  filterCommits(commits: CommitInfo[]): CommitInfo[] {
+  filterCommits(commits: CommitInfo[], excludeMergeBranches: string[]): CommitInfo[] {
     const prRegex = /Merge pull request #(\d+)/
     const filteredCommits = []
 
     for (const commit of commits) {
+      if(excludeMergeBranches) {
+        let matched = false
+        for (const excludeMergeBranch of excludeMergeBranches) {
+          if(commit.summary.includes(excludeMergeBranch)) {
+            matched = true
+            break
+          }
+        }
+        if(matched) {
+          continue
+        }
+      }
+
       const match = commit.summary.match(prRegex)
       if (!match) {
         continue

src/releaseNotes.ts

@@ -28,7 +28,7 @@ export class ReleaseNotes {
       core.debug(`fromTag undefined, trying to resolve via API`)
       const tagsApi = new Tags(octokit)
 
-      const previousTag = await tagsApi.findPredecessorTag(owner, repo, toTag)
+      const previousTag = await tagsApi.findPredecessorTag(owner, repo, toTag, configuration.max_tags_to_fetch ? configuration.max_tags_to_fetch : DefaultConfiguration.max_tags_to_fetch)
       if (previousTag == null) {
         core.error(`Unable to retrieve previous tag given ${toTag}`)
         return configuration.empty_template
@@ -57,7 +57,7 @@ export class ReleaseNotes {
   private async getMergedPullRequests(
     octokit: Octokit
   ): Promise<PullRequestInfo[]> {
-    const {owner, repo, fromTag, toTag} = this.options
+    const {owner, repo, fromTag, toTag, configuration} = this.options
     core.info(`Comparing ${owner}/${repo} - ${fromTag}...${toTag}`)
 
     const commitsApi = new Commits(octokit)
@@ -69,11 +69,18 @@ export class ReleaseNotes {
 
     const firstCommit = commits[0]
     const lastCommit = commits[commits.length - 1]
-    const fromDate = firstCommit.date
+    let fromDate = firstCommit.date
     const toDate = lastCommit.date
 
+    const maxDays = configuration.max_back_track_time_days ? configuration.max_back_track_time_days : DefaultConfiguration.max_back_track_time_days
+    const maxFromDate = toDate.clone().subtract(maxDays, "days")
+    if(maxFromDate.isAfter(fromDate)) {
+      core.info(`Adjusted 'fromDate' to go max ${maxDays} back`)
+      fromDate = maxFromDate
+    }
+
     core.info(
-      `Fetching PRs between dates ${fromDate.toISOString()} ${toDate.toISOString()} for ${owner}/${repo}`
+      `Fetching PRs between dates ${fromDate.toISOString()} to ${toDate.toISOString()} for ${owner}/${repo}`
     )
 
     const pullRequestsApi = new PullRequests(octokit)
@@ -81,12 +88,16 @@ export class ReleaseNotes {
       owner,
       repo,
       fromDate,
-      toDate
+      toDate,
+      configuration.max_pull_requests ? configuration.max_pull_requests : DefaultConfiguration.max_pull_requests
     )
 
-    core.info(`Found ${pullRequests.length} merged PRs for ${owner}/${repo}`)
+    core.info(`Retrieved ${pullRequests.length} merged PRs for ${owner}/${repo}`)
+
+    const prCommits = pullRequestsApi.filterCommits(commits, configuration.exclude_merge_branches ? configuration.exclude_merge_branches : DefaultConfiguration.exclude_merge_branches)
+
+    core.info(`Retrieved ${prCommits.length} PR merge commits for ${owner}/${repo}`)
 
-    const prCommits = pullRequestsApi.filterCommits(commits)
     const filteredPullRequests = []
     const pullRequestsByNumber: {[key: number]: PullRequestInfo} = {}
 
@@ -104,7 +115,6 @@ export class ReleaseNotes {
       if (pullRequestsByNumber[commit.prNumber]) {
         filteredPullRequests.push(pullRequestsByNumber[commit.prNumber])
       } else if (fromDate.toISOString() === toDate.toISOString()) {
-        core.info(`${prRef} not in date range, fetching explicitly`)
         const pullRequest = await pullRequestsApi.getSingle(
           owner,
           repo,
@@ -118,7 +128,7 @@ export class ReleaseNotes {
         }
       } else {
         core.info(
-          `${prRef} not in date range, likely a merge commit from a fork-to-fork PR`
+          `${prRef} not in date range, excluding from changelog`
         )
       }
     }

src/tags.ts

@@ -9,7 +9,7 @@ export interface TagInfo {
 export class Tags {
   constructor(private octokit: Octokit) {}
 
-  async getTags(owner: string, repo: string): Promise<TagInfo[]> {
+  async getTags(owner: string, repo: string, maxTagsToFetch: number): Promise<TagInfo[]> {
     const tagsInfo: TagInfo[] = []
     const options = this.octokit.repos.listTags.endpoint.merge({
       owner,
@@ -18,7 +18,6 @@ export class Tags {
       per_page: 100
     })
 
-    const max = 200
     for await (const response of this.octokit.paginate.iterator(options)) {
       type TagsListData = RestEndpointMethodTypes['repos']['listTags']['response']['data']
       const tags: TagsListData = response.data as TagsListData
@@ -30,14 +29,14 @@ export class Tags {
         })
       }
 
-      // for performance only fetch newest 200 tags!!
-      if (tagsInfo.length >= max) {
+      // for performance only fetch newest maxTagsToFetch tags!!
+      if (tagsInfo.length >= maxTagsToFetch) {
         break
       }
     }
 
     core.info(
-      `Found ${tagsInfo.length} (fetching max: ${max}) tags from the GitHub API for ${owner}/${repo}`
+      `Found ${tagsInfo.length} (fetching max: ${maxTagsToFetch}) tags from the GitHub API for ${owner}/${repo}`
     )
     return tagsInfo
   }
@@ -45,9 +44,10 @@ export class Tags {
   async findPredecessorTag(
     owner: string,
     repo: string,
-    tag: string
+    tag: string, 
+    maxTagsToFetch: number
   ): Promise<TagInfo | null> {
-    const tags = this.sortTags(await this.getTags(owner, repo))
+    const tags = this.sortTags(await this.getTags(owner, repo, maxTagsToFetch))
 
     const length = tags.length
     for (let i = 0; i < length; i++) {

src/transform.ts

@@ -105,7 +105,7 @@ function fillTemplate(pr: PullRequestInfo, template: string): string {
   transformed = transformed.replace('${{NUMBER}}', pr.number.toString())
   transformed = transformed.replace('${{TITLE}}', pr.title)
   transformed = transformed.replace('${{URL}}', pr.htmlURL)
-  transformed = transformed.replace('${{MERGED_AT}}', pr.mergedAt.toString())
+  transformed = transformed.replace('${{MERGED_AT}}', pr.mergedAt.toISOString())
   transformed = transformed.replace('${{AUTHOR}}', pr.author)
   transformed = transformed.replace('${{BODY}}', pr.body)
   return transformed