feat: support tag filter (#55)

src/config.ts

@@ -32,7 +32,8 @@ export async function resolveConfig(options: ChangelogOptions) {
   config.baseUrl = config.baseUrl ?? 'github.com'
   config.baseUrlApi = config.baseUrlApi ?? 'api.github.com'
   config.to = config.to || await getCurrentGitBranch()
-  config.from = config.from || await getLastMatchingTag(config.to) || await getFirstGitCommit()
+  config.tagFilter = config.tagFilter ?? (() => true)
+  config.from = config.from || await getLastMatchingTag(config.to, config.tagFilter) || await getFirstGitCommit()
   // @ts-expect-error backward compatibility
   config.repo = config.repo || config.github || await getGitHubRepo(config.baseUrl)
   config.prerelease = config.prerelease ?? isPrerelease(config.to)

src/git.ts

@@ -27,16 +27,17 @@ function getTagWithoutPrefix(tag: string) {
   return tag.replace(/^v/, '')
 }
 
-export async function getLastMatchingTag(inputTag: string) {
+export async function getLastMatchingTag(inputTag: string, tagFilter: (tag: string) => boolean) {
   const inputTagWithoutPrefix = getTagWithoutPrefix(inputTag)
   const isVersion = semver.valid(inputTagWithoutPrefix) !== null
   const isPrerelease = semver.prerelease(inputTag) !== null
   const tags = await getGitTags()
+  const filteredTags = tags.filter(tagFilter)
 
   let tag: string | undefined
   // Doing a stable release, find the last stable release to compare with
   if (!isPrerelease && isVersion) {
-    tag = tags.find((tag) => {
+    tag = filteredTags.find((tag) => {
       const tagWithoutPrefix = getTagWithoutPrefix(tag)
 
       return tagWithoutPrefix !== inputTagWithoutPrefix
@@ -46,7 +47,7 @@ export async function getLastMatchingTag(inputTag: string) {
   }
 
   // Fallback to the last tag, that are not the input tag
-  tag ||= tags.find(tag => tag !== inputTag)
+  tag ||= filteredTags.find(tag => tag !== inputTag)
 
   return tag
 }

src/types.ts

@@ -74,6 +74,11 @@ export interface ChangelogOptions extends Partial<ChangelogenOptions> {
    * @default api.github.com
    */
   baseUrlApi?: string
+
+  /**
+   * Filter tags
+   */
+  tagFilter?: (tag: string) => boolean
 }
 
 export type ResolvedChangelogOptions = Required<ChangelogOptions>