build: release ebook when version tag is pushed

scripts/prepare-markdown-for-ebook.sh

@@ -0,0 +1,33 @@
+#!/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.
+
+# 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."
+---
+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