Fixing up Makefile for docker build

Makefile

@@ -1,16 +1,58 @@
-all: zjid-spec.pdf zjpm-spec.pdf
+DOCKER_RUN := docker run --rm -v ${PWD}:/build -w /build \
+riscvintl/riscv-docs-base-container-image:latest
 
-zjid-spec.pdf: zjid/*.adoc
-	asciidoctor-pdf \
+HEADER_SOURCE := zjpm/header.adoc
+PDF_RESULT := zjpm-spec.pdf
+
+ASCIIDOCTOR_PDF := asciidoctor-pdf
+OPTIONS := --trace \
+           -a compress \
+           -a mathematical-format=svg \
+           -a pdf-fontsdir=docs-resources/fonts \
+           -a pdf-theme=docs-resources/themes/riscv-pdf.yml \
+           --failure-level=ERROR
+REQUIRES := --require=asciidoctor-diagram
+
+.PHONY: all build clean build-container build-no-container
+
+all: build
+
+#zjid-spec.pdf: zjid/*.adoc
+#	asciidoctor-pdf \
     --attribute=mathematical-format=svg \
     --attribute=pdf-fontsdir=docs-resources/fonts \
     --attribute=pdf-theme=docs-resources/themes/riscv-pdf.yml \
     --failure-level=ERROR \
     --out-file=$@ \
     zjid/header.adoc
 
-zjpm-spec.pdf: zjpm/*.adoc
-	asciidoctor-pdf \
+build: 
+	@echo "Checking if Docker is available..."
+	@if command -v docker >/dev/null 2>&1 ; then \
+		echo "Docker is available, building inside Docker container..."; \
+		$(MAKE) build-container; \
+	else \
+		echo "Docker is not available, building without Docker..."; \
+		$(MAKE) build-no-container; \
+	fi
+
+build-container:
+	@echo "Starting build inside Docker container..."
+	$(DOCKER_RUN) /bin/sh -c "$(ASCIIDOCTOR_PDF) $(OPTIONS) $(REQUIRES) --out-file=$(PDF_RESULT) $(HEADER_SOURCE)"
+	@echo "Build completed successfully inside Docker container."
+
+build-no-container:
+	@echo "Starting build..."
+	$(ASCIIDOCTOR_PDF) $(OPTIONS) $(REQUIRES) --out-file=$(PDF_RESULT) $(HEADER_SOURCE)
+	@echo "Build completed successfully."
+
+clean:
+	@echo "Cleaning up generated files..."
+	rm -f $(PDF_RESULT)
+	@echo "Cleanup completed."
+
+#zjpm-spec.pdf: zjpm/*.adoc
+#	asciidoctor-pdf \
     --attribute=mathematical-format=svg \
     --attribute=pdf-fontsdir=docs-resources/fonts \
     --attribute=pdf-theme=docs-resources/themes/riscv-pdf.yml \