Add macOS support.

.github/workflows/main.yml

@@ -1,13 +1,29 @@
 on: [push]
 
 jobs:
-  buck2_default_job:
+  buck2_linux:
     runs-on: ubuntu-latest
-    name: A job to try our buck2 composite action
+    name: A job to try our buck2 composite action on ubuntu.
     steps:
       - uses: actions/checkout@v4
       - name: Use buck2 composite action
         uses: zadlg/buck2-github-composite-action@v1
       - name: Verify that buck2 binary is available
         run: |
           /usr/bin/buck2 --version
+
+  buck2_macos:
+    runs-on: macos-13
+    name: A job to try our buck2 composite action on macOS.
+    steps:
+      - uses: actions/checkout@v4
+      - name: Use buck2 composite action
+        uses: zadlg/buck2-github-composite-action@v3
+        with:
+          arch: x86_64
+          platform: apple-darwin
+          sha384: 230272fa57843a024759187e5606859755250e612a288122ea91ce54f5e602186dfc8cd06c9e895c7d66954b16c9f92
+          output-path: /usr/local/bin/buck2
+      - name: Verify that buck2 binary is available
+        run: |
+          /usr/local/bin/buck2 --version

action.yml

@@ -30,7 +30,15 @@ runs:
   steps:
     - name: Download dependencies
       shell: bash
-      run: sudo apt-get update && sudo apt-get install -y curl zstd
+      run: |
+        os=$(uname -s)
+        if [ "${os}" = "Darwin" ]; then
+          brew update && brew install curl zstd
+        elif [ "${os}" = "Linux" ]; then
+          sudo apt-get update && sudo apt-get install -y curl zstd
+        else
+          printf "Unsupported OS %s\n" "${os}"
+        fi
 
     - name: Download buck2 binary
       shell: bash