install gh

.github/workflows/build.yml

@@ -103,6 +103,15 @@ jobs:
     - run: bundle exec rake --version
     - run: ruby test_subprocess.rb
 
+    # https://github.com/cli/cli/blob/trunk/docs/install_linux.md#debian-ubuntu-linux-raspberry-pi-os-apt
+    - name: install gh
+      run: |
+        sudo mkdir -p -m 755 /etc/apt/keyrings && wget -qO- https://cli.github.com/packages/githubcli-archive-keyring.gpg | sudo tee /etc/apt/keyrings/githubcli-archive-keyring.gpg > /dev/null \
+        && sudo chmod go+r /etc/apt/keyrings/githubcli-archive-keyring.gpg \
+        && echo "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/githubcli-archive-keyring.gpg] https://cli.github.com/packages stable main" | sudo tee /etc/apt/sources.list.d/github-cli.list > /dev/null \
+        && sudo apt update \
+        && sudo apt install gh -y
+
     - name: Upload Built Ruby
       env:
         GH_TOKEN: ${{ github.token }}