How to add signed commits with Github action?

[japananh]

I want to add signed commits to my repo.

I tried to import a GPG key with crazy-max/ghaction-import-gpg@v5 action but it caused an error.

"Error: The deploy step encountered an error: The process '/usr/bin/git' failed with exit code 128 ❌".

If I remove this crazy-max/ghaction-import-gpg@v5 workflow, there will be no error with Jameslves/github-pages-deploy-action.

I read some issues such as 308 but it didn't help much.

What's wrong with my workflow? How do I add signed commits to my repo?

My workflow

name: Deploy to Github Pages

on:
    push:
        branches: [main]

permissions:
  contents: write

jobs:
    build:
        runs-on: ubuntu-latest

        steps:
            - uses: actions/checkout@v3
              with:
                token: ${{ secrets.API_TOKEN_GITHUB }}

            - name: Cache Hugo resources
              uses: actions/cache@v3
              env:
                  cache-name: cache-hugo-resources
              with:
                  path: resources
                  key: ${{ env.cache-name }}

            - uses: actions/setup-go@v4
              with:
                  go-version: "^1.17.0"
            - run: go version

            - name: Cache Go Modules
              uses: actions/cache@v3
              with:
                  path: |
                      ~/.cache/go-build
                      ~/go/pkg/mod
                  key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
                  restore-keys: |
                      ${{ runner.os }}-go-
            - name: Setup Hugo
              uses: peaceiris/actions-hugo@v2
              with:
                  hugo-version: "latest"
                  extended: true

            - name: Build
              run: hugo --minify --gc

            # Remove this workflow will fix error -------------------
            
            - name: Import GPG key
              id: import_gpg
              uses: crazy-max/ghaction-import-gpg@v5
              with:
                gpg_private_key: ${{ secrets.GPG_PRIVATE_KEY }}
                git_user_signingkey: true
                git_commit_gpgsign: true

            # --------------------------------------------------------

            - name: Deploy 🚀
              uses: JamesIves/github-pages-deploy-action@v4
              with:
                  branch: gh-pages
                  folder: public
                  clean: true
                  single-commit: true
                  silent: true
                  token: ${{ secrets.API_TOKEN_GITHUB }}

            - name: Push directory to another repository
              uses: cpina/github-action-push-to-another-repository@v1.5.1
              env:
                SSH_DEPLOY_KEY: ${{ secrets.SSH_DEPLOY_KEY }}
                API_TOKEN_GITHUB: ${{ secrets.API_TOKEN_GITHUB }}
              with:
                source-directory: public
                destination-github-username: my-des-github-username
                destination-repository-name: my-repo
                user-email: my-email
                user-name: my-username
                target-branch: main
                commit-message: 'feat: add/update from the private repo'