Re-add mdbook support (#46)

book.toml

@@ -0,0 +1,5 @@
+[book]
+title = "The Tangle Improvement Proposal (TIP) Book"
+
+[output.html]
+no-section-label = true

format_tip_header.sh

@@ -0,0 +1,16 @@
+C=0
+touch tmp
+while IFS= read -r line
+do
+  if [[ $line == "---" && "$C" -eq 0 ]]; then
+      ((C++))
+      line="<pre>"
+  fi
+    if [[ $line == "---" && "$C" -eq 1 ]]; then
+        ((C++))
+        line="</pre>"
+    fi
+  echo $line >> tmp
+done < "$1"
+
+mv tmp $1

generate_book.sh

@@ -0,0 +1,34 @@
+#!/usr/bin/env bash
+
+# SPDX-License-Identifier: Apache-2.0
+# Source: https://github.com/rust-lang/rfcs/blob/85c95c7179acc8986eae709f773ff3a91f1e2e43/generate-book.sh
+
+set -e
+
+rm -rf src
+mkdir src
+cp -r tips src
+
+printf '[Introduction](introduction.md)\n\n' > src/SUMMARY.md
+
+# create summary, extract tip titles and numbers
+find ./src ! -type d -name '*.md' ! -path ./src ! -path ./src/SUMMARY.md -print0 \
+  | sed -e 's/.\/src\///g' \
+  | sort -z \
+  | while read -r -d '' file;
+do
+    tipNum=$(sed 's/-0*/-/' <<< $(basename "$file" ".md"))
+    printf -- '- [%s%s](%s)\n' ${tipNum^^} "$(sed -n 's/^title:\(.*\)$/\1/p' < $file)" "$file"
+done >> src/SUMMARY.md
+
+# remove "---" from tip header and replace it h <pre> and </pre>
+find ./src ! -type d -name '*.md' ! -path ./src ! -path ./src/SUMMARY.md -print0 \
+  | sort -z \
+  | while read -r -d '' file;
+do
+    ./format_tip_header.sh $file
+done
+
+ln -frs README.md src/introduction.md
+
+mdbook build