Add signing

Author: goanpeca

.github/workflows/test.yml

@@ -4,11 +4,22 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
+      - name: Import GPG key
+        id: import-gpg
+        uses: crazy-max/ghaction-import-gpg@v4
+        with:
+          gpg_private_key: ${{ secrets.GPG_PRIVATE_KEY }}
+          passphrase: ${{ secrets.PASSPHRASE }}
+          git_user_signingkey: true
+          git_commit_gpgsign: true
+      # TODO: Move this to the python script?
+      - name: Sign commit and push changes
+        run: |
+            git config --global user.email "${{ steps.import-gpg.outputs.email }}"
+            git config --global user.name "${{ steps.import-gpg.outputs.name }}"
       - uses: actions/checkout@main
       - name: Self test
         id: selftest
-
-        # Put your action repo here
         uses: Scientific-Python-Translations/content-sync@main
         env:
             GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
@@ -19,7 +30,6 @@ jobs:
           translations-repo: "Scientific-Python-Translations/pandas-translations"
           translations-folder: "pandas-translations/content/en/"
           translations-ref: "main"
-
       - name: Check outputs
         run: |
           test "${{ steps.selftest.outputs.todo }}" == "Hello world"