CI: Add packaging step for asy.

.github/workflows/package-asy-installer-win.yml

@@ -0,0 +1,46 @@
+name: package-asy-installer-win
+on:
+  workflow_call:
+
+jobs:
+  package-asy-installer:
+    runs-on: "windows-2022"
+    steps:
+      - name: Install prequisites
+        run: choco install nsis -y
+      - name: Test nsis version
+        run: makensis /version
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 1
+      - name: Download build artifacts
+        uses: actions/download-artifact@v4
+        with:
+          name: asy-win-x64-buildfiles
+          path: cmake-build-msvc/release/
+      - name: Download asymptote misc docs
+        uses: actions/download-artifact@v4
+        with:
+          name: asy-win-x64-misc-docs
+          path: cmake-build-msvc/release/docbuild
+      - name: Download GUI files
+        uses: actions/download-artifact@v4
+        with:
+          name: cmake-windows-gui-files
+          path: GUI/
+      - name: Download asymptote.pdf
+        uses: actions/download-artifact@v4
+        with:
+          name: asy-pdf-file
+          path: extfiles
+      - name: do cmake install
+        run: cmake --install cmake-build-msvc/release --component asy-pre-nsis
+      - name: Build installer file
+        run: |
+          $makensisexc=(Get-Command makensis).Path
+          & ./cmake-install-w32-nsis-release/build-asy-installer.ps1 -makensis-exec=$makensisexc
+      - name: Upload generated installer
+        uses: actions/download-artifact@v4
+        with:
+          name: cmake-windows-gui-files
+          path: cmake-install-w32-nsis-release/asymptote-*-setup.exe

.github/workflows/pull-req-precheck.yml

@@ -20,3 +20,17 @@ jobs:
     uses: ./.github/workflows/test-asy-windows.yml
   build-gui:
     uses: ./.github/workflows/build-gui.yml
+  package-asy-install-file:
+    needs:
+      - build-asy-windows
+      - build-gui
+      - build-asy-linux
+    uses: ./.github/workflows/package-asy-installer-win.yml
+  precheck-pass:  # this is a dummy step with the sole purpose of making the PR need only this job to pass
+    needs:
+      - test-asy-linux
+      - test-asy-linux
+      - package-asy-install-file
+    runs-on: "ubuntu-22.04"
+    steps:
+      - run: echo All prechecks pass!