Improve delete-only-untagged-versions flag and minor bug fix (#97)

Improve `delete-only-untagged-versions` flag and minor bug fix

src/delete.ts

@@ -63,6 +63,9 @@ export function finalIds(input: Input): Observable<string[]> {
       map(value => {
         // we need to delete oldest versions first
         value.sort((a, b) => {
+          if (a.created_at === b.created_at) {
+            return a.id - b.id
+          }
           return (
             new Date(a.created_at).getTime() - new Date(b.created_at).getTime()
           )

src/input.ts

@@ -63,9 +63,15 @@ export class Input {
   }
 
   checkInput(): boolean {
+    if (this.packageType.toLowerCase() !== 'container') {
+      this.deleteUntaggedVersions = 'false'
+    }
+
     if (
       this.numOldVersionsToDelete > 1 &&
-      (this.minVersionsToKeep >= 0 || this.deletePreReleaseVersions === 'true')
+      (this.minVersionsToKeep >= 0 ||
+        this.deletePreReleaseVersions === 'true' ||
+        this.deleteUntaggedVersions === 'true')
     ) {
       return false
     }
@@ -80,8 +86,9 @@ export class Input {
       this.ignoreVersions = new RegExp('^(0|[1-9]\\d*)((\\.(0|[1-9]\\d*))*)$')
     }
 
-    if (this.packageType.toLowerCase() !== 'container') {
-      this.deleteUntaggedVersions = 'false'
+    if (this.deleteUntaggedVersions === 'true') {
+      this.minVersionsToKeep =
+        this.minVersionsToKeep > 0 ? this.minVersionsToKeep : 0
     }
 
     if (this.minVersionsToKeep >= 0) {