tcp-port opt to expose Docker API to a local TCP address

src/context.ts

@@ -1,10 +1,13 @@
 import * as core from '@actions/core';
-import {InstallSource} from '@docker/actions-toolkit/lib/docker/install';
 import {parse} from 'csv-parse/sync';
 
+import {InstallSource} from '@docker/actions-toolkit/lib/docker/install';
+import {Util} from '@docker/actions-toolkit/lib/util';
+
 export interface Inputs {
   source: InstallSource;
   daemonConfig?: string;
+  tcpPort?: number;
   context: string;
   setHost: boolean;
   rootless: boolean;
@@ -21,6 +24,7 @@ export function getInputs(): Inputs {
   return {
     source: source,
     daemonConfig: core.getInput('daemon-config'),
+    tcpPort: Util.getInputNumber('tcp-port'),
     context: core.getInput('context'),
     setHost: core.getBooleanInput('set-host'),
     rootless: core.getBooleanInput('rootless')

src/main.ts

@@ -19,12 +19,20 @@ actionsToolkit.run(
       throw new Error(`'default' context cannot be used.`);
     }
 
+    let tcpPort: number | undefined;
+    let tcpAddress: string | undefined;
+    if (input.tcpPort) {
+      tcpPort = input.tcpPort;
+      tcpAddress = `tcp://127.0.0.1:${tcpPort}`;
+    }
+
     const install = new Install({
       runDir: runDir,
       source: input.source,
       rootless: input.rootless,
       contextName: input.context || 'setup-docker-action',
-      daemonConfig: input.daemonConfig
+      daemonConfig: input.daemonConfig,
+      localTCPPort: tcpPort
     });
     let toolDir;
     if (!(await Docker.isAvailable()) || input.source) {
@@ -38,6 +46,10 @@ actionsToolkit.run(
       await core.group(`Setting outputs`, async () => {
         core.info(`sock=${sockPath}`);
         core.setOutput('sock', sockPath);
+        if (tcpAddress) {
+          core.info(`tcp=${tcpAddress}`);
+          core.setOutput('tcp', tcpAddress);
+        }
       });
 
       if (input.setHost) {