- add capability to ignore any pre-release releases from matching against, only relevant if no fromTag is specified

- protect against issue if no previous tag is available

src/main.ts

@@ -33,6 +33,8 @@ async function run(): Promise<void> {
     const fromTag = core.getInput('fromTag')
     let toTag = core.getInput('toTag')
 
+    const ignorePreReleases = core.getInput('ignorePreReleases')
+
     if (!toTag) {
       // if not specified try to retrieve tag from git
       const gitHelper = await createCommandManager(repositoryPath)
@@ -87,6 +89,7 @@ async function run(): Promise<void> {
       repo,
       fromTag,
       toTag,
+      ignorePreReleases: ignorePreReleases === 'true',
       configuration
     })
 

src/releaseNotes.ts

@@ -7,11 +7,12 @@ import {Tags} from './tags'
 import {Configuration, DefaultConfiguration} from './configuration'
 
 export interface ReleaseNotesOptions {
-  owner: string
-  repo: string
-  fromTag: string | null
-  toTag: string
-  configuration: Configuration
+  owner: string // the owner of the repository
+  repo: string // the repository
+  fromTag: string | null // the tag/ref to start from
+  toTag: string // the tag/ref up to
+  ignorePreReleases: boolean // defines if we should ignore any pre-releases for matching, only relevant if fromTag is null
+  configuration: Configuration // the configuration as defined in `configuration.ts`
 }
 
 export class ReleaseNotes {
@@ -22,7 +23,7 @@ export class ReleaseNotes {
       auth: `token ${token || process.env.GITHUB_TOKEN}`
     })
 
-    const {owner, repo, toTag, configuration} = this.options
+    const {owner, repo, toTag, ignorePreReleases, configuration} = this.options
 
     if (!this.options.fromTag) {
       core.debug(`fromTag undefined, trying to resolve via API`)
@@ -32,6 +33,7 @@ export class ReleaseNotes {
         owner,
         repo,
         toTag,
+        ignorePreReleases,
         configuration.max_tags_to_fetch
           ? configuration.max_tags_to_fetch
           : DefaultConfiguration.max_tags_to_fetch

src/tags.ts

@@ -49,19 +49,32 @@ export class Tags {
     owner: string,
     repo: string,
     tag: string,
+    ignorePreReleases: boolean,
     maxTagsToFetch: number
   ): Promise<TagInfo | null> {
     const tags = this.sortTags(await this.getTags(owner, repo, maxTagsToFetch))
 
-    const length = tags.length
-    for (let i = 0; i < length; i++) {
-      if (tags[i].name.toLowerCase() === tag.toLowerCase()) {
-        return tags[i + 1]
+    try {
+      const length = tags.length
+      for (let i = 0; i < length; i++) {
+        if (tags[i].name.toLowerCase() === tag.toLowerCase()) {
+          if (ignorePreReleases) {
+            core.info(
+              `Enabled 'ignorePreReleases', searching for the closest release`
+            )
+            for (let ii = i + 1; ii < length; ii++) {
+              if (!tags[ii].name.includes('-')) {
+                return tags[ii]
+              }
+            }
+          }
+          return tags[i + 1]
+        }
       }
+      return tags[0]
+    } catch (error) {
+      return null
     }
-
-    // not found, throw exception?
-    return tags[0]
   }
 
   private sortTags(commits: TagInfo[]): TagInfo[] {