Pass stderr output for silent execution

Author: satackey

src/ImageDetector.ts

@@ -4,8 +4,8 @@ import * as core from '@actions/core'
 export class ImageDetector {
   async getExistingImages(): Promise<string[]> {
     const existingSet = new Set<string>([])
-    const ids = (await exec.exec(`docker image ls -q`, [], { silent: true })).stdoutStr.split(`\n`).filter(id => id !== ``)
-    const repotags = (await exec.exec(`docker`, `image ls --format {{.Repository}}:{{.Tag}} --filter dangling=false`.split(' '), { silent: true })).stdoutStr.split(`\n`).filter(id => id !== ``);
+    const ids = (await exec.exec(`docker image ls -q`, [], { silent: true, listeners: { stderr: console.warn }})).stdoutStr.split(`\n`).filter(id => id !== ``)
+    const repotags = (await exec.exec(`docker`, `image ls --format {{.Repository}}:{{.Tag}} --filter dangling=false`.split(' '), { silent: true, listeners: { stderr: console.warn }})).stdoutStr.split(`\n`).filter(id => id !== ``);
     core.debug(JSON.stringify({ log: "getExistingImages", ids, repotags }));
     ([...ids, ...repotags]).forEach(image => existingSet.add(image))
     core.debug(JSON.stringify({ existingSet }))

src/LayerCache.ts

@@ -61,7 +61,7 @@ class LayerCache {
   }
 
   private async getAllImageIdsFrom(repotag: string): Promise<string[]> {
-    const { stdoutStr: rawHistoryIds } = await this.exec(`docker history -q`, [repotag], { silent: true })
+    const { stdoutStr: rawHistoryIds } = await this.exec(`docker history -q`, [repotag], { silent: true, listeners: { stderr: console.warn }})
     const historyIds = rawHistoryIds.split(`\n`).filter(id => id !== `<missing>` && id !== ``)
     return historyIds
   }