Massive refactor (#165)

src/types/docker.ts

@@ -0,0 +1,32 @@
+import { getExecOutput } from "@actions/exec";
+
+export class DockerExec {
+  private readonly dockerPath: string;
+
+  constructor(dockerPath: string) {
+    this.dockerPath = dockerPath;
+  }
+
+  public async pull(image: string, args: string[], silent?: boolean) {
+    const result = await this.execute(["pull", image, ...args], silent);
+    if (result.stderr != "" || result.exitCode != 0) {
+      throw new Error(`docker images pull failed: ${result.stderr}`);
+    }
+  }
+
+  public async inspect(
+    image: string,
+    args: string[],
+    silent: boolean = false
+  ): Promise<string> {
+    const result = await this.execute(["inspect", image, ...args], silent);
+    if (result.stderr != "" || result.exitCode != 0)
+      throw new Error(`docker inspect failed: ${result.stderr}`);
+
+    return result.stdout;
+  }
+
+  private async execute(args: string[], silent: boolean = false) {
+    return await getExecOutput(this.dockerPath, args, { silent });
+  }
+}