refactor: setup context (#325)

Co-authored-by: CrazyMax <crazy-max@users.noreply.github.com>

src/context.ts

@@ -0,0 +1,23 @@
+import * as os from 'os';
+import * as core from '@actions/core';
+
+export const osPlat: string = os.platform();
+export const osArch: string = os.arch();
+
+export interface Inputs {
+  distribution: string;
+  version: string;
+  args: string;
+  workdir: string;
+  installOnly: boolean;
+}
+
+export async function getInputs(): Promise<Inputs> {
+  return {
+    distribution: core.getInput('distribution') || 'goreleaser',
+    version: core.getInput('version'),
+    args: core.getInput('args'),
+    workdir: core.getInput('workdir') || '.',
+    installOnly: core.getBooleanInput('install-only')
+  };
+}