docker: info method

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

__tests__/docker.test.ts

@@ -15,3 +15,20 @@ describe('isAvailable', () => {
     });
   });
 });
+
+describe('info', () => {
+  it('standard', () => {
+    const execSpy = jest.spyOn(exec, 'exec');
+    Docker.info();
+    expect(execSpy).toHaveBeenCalledWith(`docker`, ['version'], {
+      failOnStdErr: false
+    });
+  });
+  it('standalone', () => {
+    const execSpy = jest.spyOn(exec, 'exec');
+    Docker.info(true);
+    expect(execSpy).not.toHaveBeenCalledWith(`docker`, ['version'], {
+      failOnStdErr: false
+    });
+  });
+});

src/docker.ts

@@ -1,3 +1,4 @@
+import * as core from '@actions/core';
 import * as exec from '@actions/exec';
 
 export class Docker {
@@ -18,4 +19,17 @@ export class Docker {
         return false;
       });
   }
+
+  public static async info(standalone?: boolean) {
+    if (standalone) {
+      core.info(`Docker info skipped in standalone mode`);
+    } else {
+      await exec.exec('docker', ['version'], {
+        failOnStdErr: false
+      });
+      await exec.exec('docker', ['info'], {
+        failOnStdErr: false
+      });
+    }
+  }
 }