add ignore versions property

src/delete.ts

@@ -21,7 +21,10 @@ export function getVersionIds(input: Input): Observable<string[]> {
           versionInfo.length - input.minVersionsToKeep
         return numberVersionsToDelete <= 0
           ? []
-          : versionInfo.slice(0, numberVersionsToDelete).map(info => info.id)
+          : versionInfo
+              .filter(info => !input.ignoreVersions.test(info.version))
+              .map(info => info.id)
+              .slice(0, numberVersionsToDelete)
       })
     )
   }

src/input.ts

@@ -5,6 +5,7 @@ export interface InputParams {
   packageName?: string
   numOldVersionsToDelete?: number
   minVersionsToKeep?: number
+  ignoreVersions?: RegExp
   token?: string
 }
 
@@ -15,6 +16,7 @@ const defaultParams = {
   packageName: '',
   numOldVersionsToDelete: 0,
   minVersionsToKeep: 0,
+  ignoreVersions: new RegExp(''),
   token: ''
 }
 
@@ -25,6 +27,7 @@ export class Input {
   packageName: string
   numOldVersionsToDelete: number
   minVersionsToKeep: number
+  ignoreVersions: RegExp
   token: string
 
   constructor(params?: InputParams) {
@@ -36,6 +39,7 @@ export class Input {
     this.packageName = validatedParams.packageName
     this.numOldVersionsToDelete = validatedParams.numOldVersionsToDelete
     this.minVersionsToKeep = validatedParams.minVersionsToKeep
+    this.ignoreVersions = validatedParams.ignoreVersions
     this.token = validatedParams.token
   }
 

src/main.ts

@@ -15,6 +15,7 @@ function getActionInput(): Input {
     packageName: getInput('package-name'),
     numOldVersionsToDelete: Number(getInput('num-old-versions-to-delete')),
     minVersionsToKeep: Number(getInput('min-versions-to-keep')),
+    ignoreVersions: RegExp(getInput('ignore-versions')),
     token: getInput('token')
   })
 }