ci: add environment variable handling in GitHub Actions

- Add a new job `testing-with-env` to the GitHub Actions workflow
- Add steps to set up environment variables for public and private SSH keys
- Add a step to create a new SSH server using Docker
- Add a step to test the SSH connection using the `id_ed25519` key
- Add a step to pass a single environment variable to the SSH action
- Add a step to pass multiple environment variables to the SSH action
- Add a step to use a custom format for environment variables
- Add a step to pass all environment variables to the SSH action

Signed-off-by: appleboy <appleboy.tw@gmail.com>

.github/workflows/ssh-server.yml

@@ -337,3 +337,126 @@ jobs:
           script: |
             whoami
             ls -al
+
+  testing-with-env:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: add public key to env
+        run: |
+          echo "PUBLIC_KEY<<EOF" >> $GITHUB_ENV
+          cat testdata/.ssh/id_ed25519.pub >> $GITHUB_ENV
+          echo "EOF" >> $GITHUB_ENV
+          echo "======= public key ========="
+          cat testdata/.ssh/id_ed25519.pub
+          echo "============================"
+          echo "PRIVATE_KEY<<EOF" >> $GITHUB_ENV
+          cat testdata/.ssh/id_ed25519 >> $GITHUB_ENV
+          echo "EOF" >> $GITHUB_ENV
+          echo "======= private key ========="
+          cat testdata/.ssh/id_ed25519
+          echo "============================"
+
+      - name: create new ssh server
+        run: |
+          docker run -d \
+          --name=openssh-server \
+          --hostname=openssh-server \
+          -p 2222:2222 \
+          -e PUBLIC_KEY="${{ env.PUBLIC_KEY }}" \
+          -e SUDO_ACCESS=false \
+          -e PASSWORD_ACCESS=true  \
+          -e USER_PASSWORD=password  \
+          -e USER_NAME=linuxserver.io \
+          --restart unless-stopped \
+          lscr.io/linuxserver/openssh-server:latest
+          docker exec openssh-server sh -c "hostname -i" > ip.txt
+          echo "REMOTE_HOST<<EOF" >> $GITHUB_ENV
+          cat ip.txt >> $GITHUB_ENV
+          echo "EOF" >> $GITHUB_ENV
+          echo "======= container ip address ========="
+          cat ip.txt
+          echo "======================================"
+          sleep 2
+
+      - name: testing id_ed25519 key
+        uses: appleboy/ssh-action@v1.0.3
+        with:
+          host: ${{ env.REMOTE_HOST }}
+          username: linuxserver.io
+          key: ${{ env.PRIVATE_KEY }}
+          port: 2222
+          script: |
+            whoami
+            ls -al
+
+      - name: pass environment
+        uses: appleboy/ssh-action@v1.0.3
+        env:
+          FOO: "BAR"
+        with:
+          host: ${{ env.REMOTE_HOST }}
+          username: linuxserver.io
+          key: ${{ env.PRIVATE_KEY }}
+          port: 2222
+          envs: FOO
+          script: |
+            echo "I am $FOO, thanks"
+            echo "I am $BAR, thanks"
+
+      - name: pass multiple environment
+        uses: appleboy/ssh-action@v1.0.3
+        env:
+          FOO: "BAR"
+          BAR: "FOO"
+          SHA: ${{ github.sha }}
+          PORT: ${{ secrets.PORT }}
+        with:
+          host: ${{ env.REMOTE_HOST }}
+          username: linuxserver.io
+          key: ${{ env.PRIVATE_KEY }}
+          port: 2222
+          envs: FOO,BAR,SHA,PORT
+          script: |
+            echo "I am $FOO, thanks"
+            echo "I am $BAR, thanks"
+            echo "sha: $SHA"
+            echo "port: $PORT"
+            sh test.sh
+
+      - name: custom envs format
+        uses: appleboy/ssh-action@v1.0.3
+        env:
+          FOO: "BAR"
+          AAA: "BBB"
+        with:
+          host: ${{ env.REMOTE_HOST }}
+          username: linuxserver.io
+          key: ${{ env.PRIVATE_KEY }}
+          port: 2222
+          envs: FOO,BAR,AAA
+          envs_format: export TEST_{NAME}={VALUE}
+          script: |
+            echo "I am $TEST_FOO, thanks"
+            echo "I am $TEST_BAR, thanks"
+            echo "I am $BAR, thanks"
+            echo "I am $TEST_AAA, thanks"
+
+      - name: pass all ENV variables to script
+        uses: appleboy/ssh-action@v1.0.3
+        env:
+          INPUT_FOO: "BAR"
+          INPUT_AAA: "BBB"
+        with:
+          host: ${{ env.REMOTE_HOST }}
+          username: linuxserver.io
+          key: ${{ env.PRIVATE_KEY }}
+          port: 2222
+          allenvs: true
+          script: |
+            echo "I am $INPUT_FOO, thanks"
+            echo "I am $INPUT_AAA, thanks"
+            echo "$GITHUB_BASE_REF"
+            echo "$GITHUB_REF"