Refactor input handling

This is in preparation for caching with non-empty output directories,
where we will cache the `.zip` file instead.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

Author: dscho

main.ts

@@ -5,15 +5,18 @@ import {readdirSync} from 'fs'
 
 async function run(): Promise<void> {
   try {
-    const {artifactName, download, cacheId} = await get(
+    const {artifactName, stripPrefix, download, cacheId} = await get(
       core.getInput('repository'),
       core.getInput('definitionId'),
       core.getInput('artifact'),
       core.getInput('stripPrefix')
     )
     const outputDirectory = core.getInput('path') || artifactName
     let useCache = core.getInput('cache') === 'true'
-    const verbose = core.getInput('verbose')
+    const verbose: number | boolean = ((input?: string) =>
+      input && input.match(/^\d+$/) ? parseInt(input) : input === 'true')(
+      core.getInput('verbose')
+    )
 
     const isDirectoryEmpty = (path: string): boolean => {
       try {
@@ -40,10 +43,7 @@ async function run(): Promise<void> {
 
     if (needToDownload) {
       core.info(`Downloading ${artifactName}`)
-      await download(
-        outputDirectory,
-        verbose.match(/^\d+$/) ? parseInt(verbose) : verbose === 'true'
-      )
+      await download(outputDirectory, verbose)
 
       try {
         if (useCache && !(await saveCache([outputDirectory], cacheId))) {

src/downloader.ts

@@ -100,6 +100,7 @@ export async function get(
   stripPrefix?: string
 ): Promise<{
   artifactName: string
+  stripPrefix: string
   cacheId: string
   download: (
     outputDirectory: string,
@@ -152,6 +153,10 @@ export async function get(
     url = await getURL()
   }
 
+  if (!stripPrefix) {
+    stripPrefix = `${artifactName}/`
+  }
+
   const download = async (
     outputDirectory: string,
     verbose: number | boolean = false
@@ -184,5 +189,5 @@ export async function get(
   }
 
   const cacheId = `${repository}-${definitionId}-${artifactName}-${data.value[0].id}`
-  return {artifactName, download, cacheId}
+  return {artifactName, stripPrefix, download, cacheId}
 }