Install DDEV binary manually instead via APT

.gitignore

@@ -1,2 +1 @@
 /.idea
-#/node_modules

README.md

@@ -84,6 +84,99 @@ default: `latest`
       version: 1.22.4
 ```
 
+### installScriptUrl
+
+URL to the DDEV installation script. This allows you to specify a custom or alternative source for the DDEV installation script.
+
+default: `https://ddev.com/install.sh`
+
+```
+  - uses: ddev/github-action-setup-ddev@v1
+    with:
+      installScriptUrl: "https://raw.githubusercontent.com/ddev/ddev/v1.22.4/scripts/install_ddev.sh"
+```
+
+This option is useful for:
+- Using a specific version of the installation script from a tagged release
+- Testing with a development version from a specific branch
+- Using a forked or modified version of the installation script
+- Working with air-gapped environments that require local script hosting
+
+Example with custom script source:
+
+```
+  - name: Setup DDEV with custom installation script
+    uses: ddev/github-action-setup-ddev@v1
+    with:
+      installScriptUrl: "https://my-company.com/scripts/custom_ddev_install.sh"
+      version: "v1.22.4"
+      retryAttempts: 3
+```
+
+### Retry configuration options
+
+The action includes built-in retry logic with exponential backoff for improved reliability in CI/CD environments. These options are all optional and have sensible defaults.
+
+#### retryAttempts
+
+Maximum number of retry attempts for DDEV installation and operations.
+
+default: `5`
+
+```
+  - uses: ddev/github-action-setup-ddev@v1
+    with:
+      retryAttempts: 5
+```
+
+#### initialDelay
+
+Initial delay in seconds between retries.
+
+default: `2`
+
+```
+  - uses: ddev/github-action-setup-ddev@v1
+    with:
+      initialDelay: 5
+```
+
+#### maxDelay
+
+Maximum delay in seconds between retries. This prevents the delay from growing too large with exponential backoff.
+
+default: `30`
+
+```
+  - uses: ddev/github-action-setup-ddev@v1
+    with:
+      maxDelay: 60
+```
+
+#### retryMultiplier
+
+Delay multiplier for exponential backoff. Each retry will multiply the previous delay by this value.
+
+default: `2`
+
+```
+  - uses: ddev/github-action-setup-ddev@v1
+    with:
+      retryMultiplier: 3
+```
+
+#### jitterPercent
+
+Jitter percentage (0-100) to add randomness to retry delays. This helps prevent thundering herd problems when multiple jobs retry simultaneously.
+
+default: `25`
+
+```
+  - uses: ddev/github-action-setup-ddev@v1
+    with:
+      jitterPercent: 50
+```
+
 ## Common recipes
 
 ### SSH keys

action.yml

@@ -1,23 +1,100 @@
-name: 'Setup DDEV in Github Workflows'
-description: |
-  This action installs **DDEV** in your Github Workflow.
+name: 'Setup and start DDEV action'
+description: 'Set up your GitHub Actions workflow with DDEV'
 author: 'Jonas Eberle and DDEV contributors'
-runs:
-  using: 'node20'
-  main: 'lib/main.js'
-branding:
-  icon: cpu
-  color: yellow
+
 inputs:
   ddevDir:
-    description: 'ddev project directory'
+    description: 'Path to your DDEV project. This path needs to contain the .ddev/ directory.'
     required: false
     default: '.'
+
   autostart:
-    description: 'Start ddev automatically'
+    description: 'Starts your DDEV project immediately.'
     required: false
-    default: true
+    default: 'true'
+
   version:
-    description: 'Install a specific ddev version, such as 1.22.4'
+    description: 'Install a specific DDEV version. Example: 1.24.0'
     required: false
     default: 'latest'
+
+  retryAttempts:
+    description: 'Maximum number of retry attempts for DDEV installation and operations'
+    required: false
+    default: '5'
+
+  initialDelay:
+    description: 'Initial delay in seconds between retries'
+    required: false
+    default: '2'
+
+  maxDelay:
+    description: 'Maximum delay in seconds between retries'
+    required: false
+    default: '30'
+
+  retryMultiplier:
+    description: 'Delay multiplier for exponential backoff'
+    required: false
+    default: '2'
+
+  jitterPercent:
+    description: 'Jitter percentage (0-100) to add randomness to retry delays'
+    required: false
+    default: '25'
+
+  installScriptUrl:
+    description: 'URL to the DDEV installation script'
+    required: true
+    default: 'https://ddev.com/install.sh'
+
+runs:
+  using: 'composite'
+  steps:
+    - name: Download DDEV install script
+      shell: bash
+      run: |       
+        "${{ github.action_path }}/scripts/retry.sh" \
+          --attempts "${{ inputs.retryAttempts }}" \
+          --initial-delay "${{ inputs.initialDelay }}" \
+          --max-delay "${{ inputs.maxDelay }}" \
+          --multiplier "${{ inputs.retryMultiplier }}" \
+          --jitter "${{ inputs.jitterPercent }}" \
+          --description "Download DDEV install script" \
+          -- curl -fsSL --retry 3 --retry-max-time 60 --retry-connrefused \
+             -o /tmp/install_ddev.sh \
+             "${{ inputs.installScriptUrl }}"
+
+    - name: Install DDEV
+      shell: bash
+      run: |
+        if [[ '${{ inputs.version }}' != 'latest' ]]; then
+          VERSION_ARG="v${{ inputs.version }}"
+          echo "Installing DDEV version: ${VERSION_ARG}"
+        else
+          VERSION_ARG=""
+          echo "Installing latest DDEV version"
+        fi
+
+        # Make installation script executable
+        chmod +x /tmp/install_ddev.sh
+
+        "${{ github.action_path }}/scripts/retry.sh" \
+          --attempts "${{ inputs.retryAttempts }}" \
+          --initial-delay "${{ inputs.initialDelay }}" \
+          --max-delay "${{ inputs.maxDelay }}" \
+          --multiplier "${{ inputs.retryMultiplier }}" \
+          --jitter "${{ inputs.jitterPercent }}" \
+          --description "DDEV installation" \
+          -- /tmp/install_ddev.sh ${VERSION_ARG}
+
+    - name: Start DDEV project
+      shell: bash
+      working-directory: ${{ inputs.ddevDir }}
+      if: inputs.autostart == 'true'
+      run: |
+        ddev start
+
+branding:
+  icon: 'cpu'
+  color: yellow