setup ninja

.github/actions/setup-ninja/action.yml

@@ -0,0 +1,17 @@
+name: Setup Ninja
+description: Sets up Ninja
+
+inputs:
+  host:
+    description: 'Host platform: win, mac or linux'
+    required: true
+
+runs:
+  using: "composite"
+  steps:
+  - name: Setup
+    shell: bash
+    run: |
+      curl -L https://github.com/ninja-build/ninja/releases/latest/download/ninja-${{ inputs.host }}.zip -o ninja.zip
+      7z x ninja.zip -o"$GITHUB_WORKSPACE/ninja"
+      echo "$GITHUB_WORKSPACE/ninja" >> $GITHUB_PATH