Add combined Anki deck artifact to CI

Build a single "Coding Flashcards" deck containing every language's
cards and upload it as its own workflow artifact (and release asset on
tagged builds).

Author: ad-si

.github/workflows/build-artifacts.yml

@@ -72,3 +72,32 @@ jobs:
           files: |
             cards-${{ matrix.language }}.apkg
             cards-${{ matrix.language }}.pdf
+
+  combined:
+    runs-on: macos-14
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+
+      - name: Install Nix
+        uses: cachix/install-nix-action@v26
+        with:
+          nix_path: nixpkgs=channel:nixos-23.11
+          github_access_token: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build combined Anki deck with Nix
+        run: |
+          nix develop --command bash -c 'make build-combined'
+
+      - name: Upload combined deck to workflow run
+        uses: actions/upload-artifact@v7
+        with:
+          name: cards-combined
+          path: cards-combined.apkg
+          if-no-files-found: error
+
+      - name: Release
+        if: startsWith(github.ref, 'refs/tags/v')
+        uses: softprops/action-gh-release@v2
+        with:
+          files: cards-combined.apkg

.gitignore

@@ -1 +1,3 @@
 .direnv
+cards-combined.md
+cards-combined.apkg

makefile

@@ -11,6 +11,25 @@ build:
 	cd wolfram-language && make build
 
 
+cards-combined.md: rust/cards.md godot/cards.md sqlite/cards.md wolfram-language/cards.md
+	printf -- '---\nname: Coding Flashcards\n---\n' > $@
+	for f in $^; do \
+		dir=$$(dirname "$$f"); \
+		awk -v dir="$$dir" 'BEGIN{seen=0} \
+			/^---$$/ && seen<2 {seen++; next} \
+			seen>=2 {gsub(/\.\/images\//, "images/"); gsub(/images\//, dir "/images/"); print}' \
+			"$$f" >> $@; \
+	done
+
+
+cards-combined.apkg: cards-combined.md
+	anki-panky $<
+
+
+.PHONY: build-combined
+build-combined: cards-combined.apkg
+
+
 .PHONY: test
 test:
 	cd rust && make test
@@ -21,6 +40,7 @@ test:
 
 .PHONY: clean
 clean:
+	rm -f cards-combined.md cards-combined.apkg
 	cd rust && make clean
 	cd godot && make clean
 	cd sqlite && make clean