feat: Add disable_nojekyll and cname options (#119)

* feat: Add disable_nojekyll and cname options
* docs: Add cname and disable_nojekyll
* chore: Add vim
* chore(release): 3.3.0-0
* ci: Add codecov/codecov-action
* refactor: Enhance warning message

- Add .nojekyll file by default to only the master and gh-pages branches. When the file already exists, this action does nothing.
- When we set other branches to publish_branch, this action does not add .nojekyll file.

cf. https://github.com/peaceiris/actions-gh-pages/issues/112#issuecomment-589678269

Close #112

Co-authored-by: Daniel Himmelstein <daniel.himmelstein@gmail.com>
Co-authored-by: Nicolas Vanhoren <nicolas.vanhoren@gmail.com>

src/utils.ts

@@ -1,6 +1,9 @@
 import * as core from '@actions/core';
+import * as io from '@actions/io';
+import path from 'path';
+import fs from 'fs';
 
-export function getHomeDir(): string {
+export async function getHomeDir(): Promise<string> {
   let homedir = '';
 
   if (process.platform === 'win32') {
@@ -13,3 +16,49 @@ export function getHomeDir(): string {
 
   return homedir;
 }
+
+export async function getWorkDirName(unixTime: string): Promise<string> {
+  const homeDir = await getHomeDir();
+  const workDirName = path.join(homeDir, `actions_github_pages_${unixTime}`);
+  return workDirName;
+}
+
+export async function createWorkDir(workDirName: string): Promise<void> {
+  await io.mkdirP(workDirName);
+  core.debug(`Created: ${workDirName}`);
+  return;
+}
+
+export async function addNoJekyll(
+  workDir: string,
+  DisableNoJekyll: boolean,
+  PublishBranch: string
+): Promise<void> {
+  if (DisableNoJekyll) {
+    return;
+  }
+  if (PublishBranch === 'master' || PublishBranch === 'gh-pages') {
+    const filepath = path.join(workDir, '.nojekyll');
+    if (fs.existsSync(filepath)) {
+      return;
+    }
+    fs.closeSync(fs.openSync(filepath, 'w'));
+    core.info(`[INFO] Created ${filepath}`);
+  }
+}
+
+export async function addCNAME(
+  workDir: string,
+  content: string
+): Promise<void> {
+  if (content === '') {
+    return;
+  }
+  const filepath = path.join(workDir, 'CNAME');
+  if (fs.existsSync(filepath)) {
+    core.warning(`CNAME already exists, skip adding CNAME`);
+    return;
+  }
+  fs.writeFileSync(filepath, content + '\n');
+  core.info(`[INFO] Created ${filepath}`);
+}