Fix path for go.sum

src/cache.ts

@@ -1,5 +1,6 @@
 import * as cache from "@actions/cache";
 import * as core from "@actions/core";
+import * as exec from "@actions/exec";
 import * as crypto from "crypto";
 import * as fs from "fs";
 import * as path from "path";
@@ -15,7 +16,10 @@ export interface State {
 
 export async function restore(cwd: string): Promise<State> {
   const keyPrefix = `${process.platform}-golangci-`;
-  const hash = await hashFiles(path.join(cwd, "go.sum"));
+  const goSumPath = await getGoSumPath(cwd);
+  core.info(`go.sum path is ${goSumPath}`);
+
+  const hash = await hashFiles(goSumPath);
   const key = keyPrefix + hash;
   const restoreKeys = [keyPrefix];
 
@@ -40,6 +44,13 @@ export async function restore(cwd: string): Promise<State> {
   return { key, cachedKey };
 }
 
+async function getGoSumPath(cwd: string): Promise<string> {
+  const opt = { cwd };
+  const output = await exec.getExecOutput("go", ["env", "GOMOD"], opt);
+  const goModPath = output.stdout.trim();
+  return path.join(path.dirname(goModPath), "go.sum");
+}
+
 export async function save(state: State): Promise<void> {
   const { cachedKey, key } = state;
   if (cachedKey === key) {

src/installer.ts

@@ -109,7 +109,7 @@ async function tagToVersion(tag: string, owner: string, repo: string): Promise<s
   const headers = { [http.Headers.Accept]: "application/json" };
   const response = await client.getJson<Release>(url, headers);
 
-  if (response.statusCode != http.HttpCodes.OK) {
+  if (response.statusCode !== http.HttpCodes.OK) {
     core.error(`${url} returns unexpected HTTP status code: ${response.statusCode}`);
   }
   if (!response.result) {

src/main.ts

@@ -11,7 +11,7 @@ import * as flags from "./flags";
 import * as setupGo from "./setup-go/main";
 import * as cache from "./cache";
 
-async function run() {
+async function run(): Promise<void> {
   const runnerTmpdir = process.env["RUNNER_TEMP"] || os.tmpdir();
   const tmpdir = await fs.mkdtemp(path.join(runnerTmpdir, "reviewdog-"));
 
@@ -119,4 +119,4 @@ async function run() {
   }
 }
 
-run();
+void run();