From d96de404c45f17310c3eb77b4669d715ce923d33 Mon Sep 17 00:00:00 2001
From: simonsan <14062932+simonsan@users.noreply.github.com>
Date: Sun, 17 Mar 2024 03:35:42 +0100
Subject: [PATCH] feat(pdf): add pdf download (#399)

Signed-off-by: simonsan <14062932+simonsan@users.noreply.github.com>
---
 .env                                        | 1 +
 .github/workflows/install-mdbook/action.yml | 5 +++--
 README.md                                   | 3 +++
 book.toml                                   | 2 +-
 src/intro.md                                | 5 +++++
 theme/index.hbs                             | 3 +++
 6 files changed, 16 insertions(+), 3 deletions(-)

diff --git a/.env b/.env
index 193c72d..3976745 100644
--- a/.env
+++ b/.env
@@ -2,3 +2,4 @@ MDBOOK_VERSION=0.4.37
 MDBOOK_I18N_HELPERS_VERSION=0.3.2
 MDBOOK_PANDOC_VERSION=0.6.0
 MDBOOK_LAST_CHANGED_VERSION=0.1.4
+PANDOC_VERSION=3.1.12.2
\ No newline at end of file
diff --git a/.github/workflows/install-mdbook/action.yml b/.github/workflows/install-mdbook/action.yml
index 6cc6d3b..57a50e2 100644
--- a/.github/workflows/install-mdbook/action.yml
+++ b/.github/workflows/install-mdbook/action.yml
@@ -40,8 +40,9 @@ runs:
 
     - name: Install mdbook-pandoc and related dependencies
       run: |
+        . ./.env
         sudo apt-get update
         sudo apt-get install -y texlive texlive-latex-extra texlive-luatex texlive-lang-cjk librsvg2-bin fonts-noto
-        curl -LsSf https://github.com/jgm/pandoc/releases/download/3.1.12.2/pandoc-3.1.12.2-linux-amd64.tar.gz | tar zxf -
-        echo "$PWD/pandoc-3.1.12.2/bin" >> $GITHUB_PATH
+        curl -LsSf https://github.com/jgm/pandoc/releases/download/$PANDOC_VERSION/pandoc-$PANDOC_VERSION-linux-amd64.tar.gz | tar zxf -
+        echo "$PWD/pandoc-$PANDOC_VERSION/bin" >> $GITHUB_PATH
       shell: bash
diff --git a/README.md b/README.md
index cdad791..6954c59 100644
--- a/README.md
+++ b/README.md
@@ -3,6 +3,9 @@
 An open source book about design patterns and idioms in the Rust programming
 language that you can read [here](https://rust-unofficial.github.io/patterns/).
 
+You can also download the book in PDF format from
+[this link](https://rust-unofficial.github.io/patterns/rust-design-patterns.pdf).
+
 ## Contributing
 
 You are missing content in this repository that can be helpful for others, and
diff --git a/book.toml b/book.toml
index a44e064..ab2ea9c 100644
--- a/book.toml
+++ b/book.toml
@@ -51,7 +51,7 @@ optional = true
 hosted-html = "https://rust-unofficial.github.io/patterns/"
 
 [output.pandoc.profile.pdf]
-output-file = "patterns.pdf"
+output-file = "rust-design-patterns.pdf"
 pdf-engine = "lualatex"
 
 [output.pandoc.profile.pdf.variables]
diff --git a/src/intro.md b/src/intro.md
index 1f70e3d..70b648e 100644
--- a/src/intro.md
+++ b/src/intro.md
@@ -5,6 +5,11 @@
 If you are interested in contributing to this book, check out the
 [contribution guidelines](https://github.com/rust-unofficial/patterns/blob/master/CONTRIBUTING.md).
 
+## 📯 News
+
+- **2024-03-17**: You can now download the book in PDF format from
+  [this link](https://rust-unofficial.github.io/patterns/rust-design-patterns.pdf).
+
 ## Design patterns
 
 In software development, we often come across problems that share similarities
diff --git a/theme/index.hbs b/theme/index.hbs
index 30c42d9..58a7ea0 100644
--- a/theme/index.hbs
+++ b/theme/index.hbs
@@ -227,6 +227,9 @@
                         <a href="{{ path_to_root }}print.html" title="Print this book" aria-label="Print this book">
                             <i id="print-button" class="fa fa-print"></i>
                         </a>
+                        <a href="{{ path_to_root }}rust-design-patterns.pdf" title="This book as a PDF" aria-label="This book as a PDF">
+                            <i id="open-pdf-button" class="fa fa-download"></i>
+                        </a>
                         {{/if}}
                         {{#if git_repository_url}}
                         <a href="{{git_repository_url}}" title="Git repository" aria-label="Git repository">