feat: add herbstluftwm (#25)

Author: tlambert03

README.md

@@ -35,22 +35,29 @@ jobs:
 
 - `qt` (default `false`): set to `true` to install libraries required for Qt
   on Linux, e.g.:
+
   ```yml
       - uses: pyvista/setup-headless-display-action@v3
         with:
           qt: true
   ```
+
 - `pyvista` (default `true`): set to `false` if you don't want to set env
   vars to use PyVista in offscreen mode.
 
+- `wm` (default `herbstluftwm`): Installs window manager on Linux.
+  set to `false` if you don't want to install a window manager.
+
 - `mesa3d-release` (default `24.3.0`): set to a specific release to install
   that version of Mesa3D. This is only applicable for Windows. For example,
   to install Mesa3D 21.2.5:
+
   ```yml
       - uses: pyvista/setup-headless-display-action@v3
         with:
           mesa3d-release: 21.2.5
   ```
+
   You can also use `latest` to use the latest release version.
 
 ### 🖼️ PyVista Example

action.yml

@@ -5,11 +5,15 @@ inputs:
   pyvista:
     description: "Set PyVista env vars for headless mode"
     required: false
-    default: true
+    default: "true"
   qt:
     description: "Install libraries required for Qt on Linux"
     required: false
-    default: false
+    default: "false"
+  wm:
+    description: "Install window manager on Linux"
+    required: false
+    default: "herbstluftwm"
   mesa3d-release:
     description: |
       Mesa3D release to install (by default, the latest release is installed).
@@ -38,6 +42,11 @@ runs:
           xvfb \
           x11-xserver-utils
 
+    - name: Install Linux Window manager
+      shell: bash
+      if: runner.os == 'Linux' && inputs.wm == 'herbstluftwm'
+      run: sudo apt-get install -y herbstluftwm
+
     - name: Install Linux Qt dependencies
       if: runner.os == 'Linux' && inputs.qt != 'false'
       shell: bash
@@ -88,6 +97,13 @@ runs:
         Xvfb :99 -screen 0 1024x768x24 > /dev/null 2>&1 &
         sleep 3
 
+    - name: Start window manager on Linux
+      if: runner.os == 'Linux' && inputs.wm == 'herbstluftwm'
+      shell: bash
+      run: |
+        herbstluftwm &
+        sleep 3
+
     - name: Configure for PyVista
       if: inputs.pyvista != 'false'
       shell: bash