fix: skip on forks

Close #153

src/main.ts

@@ -4,13 +4,22 @@ import {Inputs} from './interfaces';
 import {showInputs, getInputs} from './get-inputs';
 import {setTokens} from './set-tokens';
 import {setRepo, setCommitAuthor, commit, push, pushTag} from './git-utils';
-import {getWorkDirName, addNoJekyll, addCNAME} from './utils';
+import {getWorkDirName, addNoJekyll, addCNAME, skipOnFork} from './utils';
 
 export async function run(): Promise<void> {
   try {
     const inps: Inputs = getInputs();
     showInputs(inps);
 
+    const isSkipOnFork = await skipOnFork(
+      inps.GithubToken,
+      inps.DeployKey,
+      inps.PersonalToken
+    );
+    if (isSkipOnFork) {
+      return;
+    }
+
     const remoteURL = await setTokens(inps);
     core.debug(`[INFO] remoteURL: ${remoteURL}`);
 

src/utils.ts

@@ -1,3 +1,4 @@
+import {context} from '@actions/github';
 import * as core from '@actions/core';
 import * as io from '@actions/io';
 import path from 'path';
@@ -62,3 +63,23 @@ export async function addCNAME(
   fs.writeFileSync(filepath, content + '\n');
   core.info(`[INFO] Created ${filepath}`);
 }
+
+export async function skipOnFork(
+  githubToken: string,
+  deployKey: string,
+  personalToken: string
+): Promise<boolean> {
+  const isForkRepository =
+    // eslint-disable-next-line @typescript-eslint/no-explicit-any
+    (context.payload as any).repository.fork.toUpperCase() === 'TRUE';
+
+  if (!isForkRepository || githubToken) {
+    return false;
+  }
+
+  if (isForkRepository && (deployKey || personalToken)) {
+    return false;
+  }
+
+  return true;
+}