#!/usr/bin/env bash
# This script prepares a `hacker-laws.md` file which is in a format ready to be
# exported to PDF or other formats for an e-book.

# Require that we provide the version number and get a date.
version=$1
date=$(date "+%Y-%m-%d")

if [ -z $version ]; then
    echo "version must be specified: ./prepare-markdown-for-ebook.sh <version>"
    exit 1
fi

# Create the frontmatter.
cat << EOF > frontmatter.md
---
title: "Hacker Laws"
author: "Dave Kerr, github.com/dwmkerr/hacker-laws"
subtitle: "Laws, Theories, Principles and Patterns that developers will find useful. ${version}, ${date}."
---
EOF

# Combine the frontmatter and the laws.
cat frontmatter.md README.md >> hacker-laws.md

# Remove the title - we have it in the front-matter of the doc, so it will
# automatically be added to the PDF.
sed -i'' '/💻📖.*/d' hacker-laws.md

# We can't have emojis in the final content with the PDF generator we're using.
sed -i'' 's/❗/Warning/' hacker-laws.md

# Now rip out the translations line.
sed -i'' '/^\[Translations.*/d' hacker-laws.md

# # Now rip out any table of contents items.
sed -i'' '/\*.*/d' hacker-laws.md
sed -i'' '/    \*.*/d' hacker-laws.md

# Delete everything from 'Translations' onwards (we don't need the translations
# lists, related projects, etc).
sed -i'' '/## Translations/,$d' hacker-laws.md