build: release ebook when version tag is pushed

.github/workflows/build-on-pull-request.yaml

@@ -0,0 +1,38 @@
+# This pipeline builds the PDF ebook on any pull request to master.
+name: "Build PDF"
+on:
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  prepare-pdf:
+    # Focal Fossa. Please don't use 'latest' tags, it's an anti-pattern.
+    runs-on: ubuntu-20.04
+    steps:
+      # Checkout the code.
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      # Prepare the content files.
+      - name: Prepare Content
+        run: ./scripts/prepare-markdown-for-ebook.sh
+      
+      # Create a PDF from the prepared markdown.
+      - name: Prepare PDF
+        uses: docker://pandoc/latex:2.9
+        with:
+          args: "-V toc-title:\"Table Of Contents\" --toc --pdf-engine=pdflatex --standalone --output hacker-laws.pdf hacker-laws.md"
+
+      # Publish the PDF and intermediate markdown as an artifact.
+      - name: Publish PDF Artifact
+        uses: actions/upload-artifact@master
+        with:
+          name: hacker-laws.pdf
+          path: hacker-laws.pdf
+
+      - name: Publish Intermiediate Markdown Artifact
+        uses: actions/upload-artifact@master
+        with:
+          name: hacker-laws.md
+          path: hacker-laws.md

.github/workflows/release-on-tag.yaml

@@ -0,0 +1,64 @@
+# This pipeline builds the PDF ebook on any tag starting with 'v'.
+name: "Create Release"
+on:
+  push:
+    tags:
+      - 'v*'
+
+jobs:
+  prepare-pdf:
+    # Focal Fossa. Please don't use 'latest' tags, it's an anti-pattern.
+    runs-on: ubuntu-20.04
+    steps:
+      # Checkout the code.
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      # Prepare the content files.
+      - name: Prepare Content
+        run: ./scripts/prepare-markdown-for-ebook.sh
+      
+      # Create a PDF from the prepared markdown.
+      - name: Prepare PDF
+        uses: docker://pandoc/latex:2.9
+        with:
+          args: "-V toc-title:\"Table Of Contents\" --toc --pdf-engine=pdflatex --standalone --output hacker-laws.pdf hacker-laws.md"
+
+      # Publish the PDF artifact.
+      - name: Publish PDF Artifacts
+        uses: actions/upload-artifact@master
+        with:
+          name: hacker-laws.pdf
+          path: hacker-laws.pdf
+
+  release:
+    needs: prepare-pdf
+    runs-on: ubuntu-20.04
+    steps:
+      - name: Download artifact
+        uses: actions/download-artifact@v2
+        with:
+          name: hacker-laws.pdf
+          
+      - name: Create Release
+        id: create-release
+        uses: actions/create-release@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          tag_name: ${{ github.ref }}
+          release_name: ${{ github.ref }}
+          body: |
+            Hacker Laws E-Book
+          draft: false
+          prerelease: false
+          
+      - name: Upload Release Asset
+        uses: actions/upload-release-asset@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          upload_url: ${{ steps.create-release.outputs.upload_url }}
+          asset_path: ./hacker-laws.pdf
+          asset_name: hacker-laws.pdf
+          asset_content_type: application/pdf

scripts/prepare-markdown-for-ebook.sh

@@ -1,10 +1,6 @@
 #!/usr/bin/env bash
-#
-# Requirements:
-# - pandoc
-# - xelatex
-# brew install 
-# brew cask install basictex
+# 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
@@ -20,21 +16,18 @@ 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
+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
+sed -i'' 's/❗/Warning/' hacker-laws.md
 
 # Now rip out the translations line.
-sed -i '' '/^\[Translations.*/d' hacker-laws.md
+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
+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/,$d' hacker-laws.md
-
-# Now build the e-book as a PDF.
-pandoc  -V toc-title:"Table Of Contents" --toc --pdf-engine=pdflatex -s -o hacker-laws.pdf hacker-laws.md
+sed -i'' '/## Translations/,$d' hacker-laws.md