add Makefile to create docx and html documents from the wiki

.gitignore

@@ -65,3 +65,8 @@ daffodil-debugger-*
 
 # ignore generated schema files
 server/sbtXjc/resources/xsd/*.xsd
+
+# generated documents
+doc/*.docx
+doc/*.html
+doc/.wiki/

doc/Makefile

@@ -0,0 +1,86 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Requires: make, git, sed, and pandoc
+
+# URL of the wiki repository containing the markdown files
+REPO_URL := https://github.com/apache/daffodil-vscode.wiki.git
+
+# Directory containing the wiki markdown files
+SRC_DIR := .wiki/
+
+# Filter out markdown files starting with underscore
+SRC_MD = $(filter-out $(SRC_DIR)_%, $(wildcard $(SRC_DIR)*.md))
+
+# List of docx and html files to generate from the markdown files
+DOCX = $(addsuffix .docx, $(basename $(notdir $(SRC_MD))))
+HTML = $(addsuffix .html, $(basename $(notdir $(SRC_MD))))
+
+# Function to sanitize filenames
+# 1. Replace non-alphanumeric (except dots and hyphens) with underscores
+# 2. Replace consecutive underscores with a single underscore
+# 3. Replace underscore followed by hyphen with just the hyphen
+sanitize = $(shell echo $(1) | sed -e 's/[^a-zA-Z0-9.\-]/_/g' -e 's/__*/_/g' -e 's/_\-/-/g')
+
+help:
+	@echo "Available targets:"
+	@echo "  all    - Clone/update the repo and generate docx and html files."
+	@echo "  docx   - Generate docx files from the wiki markdown files."
+	@echo "  html   - Generate html files from the wiki markdown files."
+	@echo "  update - Pull updates from the wiki repository (markdown source repo)."
+	@echo "  clean  - Remove generated docx, html files and the cloned wiki."
+
+# Target to clone the git wiki repository containing the markdown files
+$(SRC_DIR):
+	@if ! git clone $(REPO_URL) $(SRC_DIR); then \
+		echo "Failed to clone repository"; \
+		exit 1; \
+	fi
+
+# Target to generate docx from md
+%.docx: $(SRC_DIR)
+	@# Convert img tags to markdown syntax for pandoc
+	sed -r 's!<img[^>]* src="([^"]+)"[^>]*>!\![](\1)!g' "$(SRC_DIR)$(addsuffix .md,$(basename $@))" | pandoc -t docx -f gfm --resource-path=$(SRC_DIR) --toc=true -o "$(call sanitize,$@)" -
+
+# Target to generate html from md
+%.html: $(SRC_DIR)
+	@# Convert img tags to markdown syntax for pandoc
+	sed -r 's!<img[^>]* src="([^"]+)"[^>]*>!\![](\1)!g' "$(SRC_DIR)$(addsuffix .md,$(basename $@))" | pandoc -t html -f gfm --resource-path=$(SRC_DIR) --embed-resources --standalone --toc=true --metadata title="$(subst -, ,$(basename $@))" -o "$(call sanitize,$@)" -
+
+# Target to update the wiki repository
+update: $(SRC_DIR)
+	@if ! git -C $(SRC_DIR) pull; then \
+		echo "Failed to update the repository"; \
+		exit 1; \
+	fi
+
+# Target to generate docx from md
+docx: update
+	@${MAKE} $(DOCX)
+
+# Target to generate html from md
+html: update
+	@${MAKE} $(HTML)
+
+# Main target to update the repo and then generate the documentation files
+all: docx html
+
+# Cleanup target
+clean:
+	rm -rf *.docx *.html $(SRC_DIR)
+
+.DEFAULT_GOAL := help
+.PHONY: help update docx html all clean
+