CI: Tweak Linux-only deployment logic

.github/build.sh

@@ -1,4 +1,3 @@
 #!/bin/sh
 curl -fsLO https://raw.githubusercontent.com/scijava/scijava-scripts/master/ci-build.sh
-# NB: Only the Linux CI node should deploy build artifacts.
-NO_DEPLOY=$(test "$(uname)" = Linux || echo 1) sh ci-build.sh
+sh ci-build.sh

.github/setup.sh

@@ -1,3 +1,10 @@
 #!/bin/sh
 curl -fsLO https://raw.githubusercontent.com/scijava/scijava-scripts/master/ci-setup-github-actions.sh
 sh ci-setup-github-actions.sh
+
+# Let the Linux build handle artifact deployment.
+if [ "$(uname)" != Linux ]
+then
+  echo "No deploy -- non-Linux build"
+  echo "NO_DEPLOY=1" >> $GITHUB_ENV
+fi

.github/workflows/build.yml

@@ -1,14 +1,14 @@
 name: build
 
 on:
-  pull_request:
-    branches:
-      - master
   push:
     branches:
       - master
     tags:
       - "*-[0-9]+.*"
+  pull_request:
+    branches:
+      - master
 
 jobs:
   build:
@@ -28,6 +28,7 @@ jobs:
           cache: 'maven'
       - name: Set up CI environment
         run: .github/setup.sh
+        shell: bash
       - name: Execute the build
         run: .github/build.sh
         shell: bash