Use Node to generate PDF instead

.gitignore

@@ -1,6 +1,4 @@
-book.pdf
-
-# Created by https://www.gitignore.io/api/ruby,linux,jekyll
+# Created by https://www.gitignore.io/api/node,ruby,linux,jekyll
 
 ### Jekyll ###
 _site/
@@ -22,6 +20,67 @@ _site/
 # .nfs files are created when an open file is removed but is still being accessed
 .nfs*
 
+### Node ###
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (http://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# Typescript v1 declaration files
+typings/
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variables file
+.env
+
+
 ### Ruby ###
 *.gem
 *.rbc
@@ -34,6 +93,7 @@ _site/
 /test/tmp/
 /test/version_tmp/
 /tmp/
+package-lock.json
 
 # Used by dotenv library to load environment variables.
 # .env
@@ -74,4 +134,4 @@ build-iPhoneSimulator/
 # unless supporting rvm < 1.11.0 or doing something fancy, ignore this:
 .rvmrc
 
-# End of https://www.gitignore.io/api/ruby,linux,jekyll
+# End of https://www.gitignore.io/api/node,ruby,linux,jekyll

utils/convert_to_pdf.js

@@ -0,0 +1,41 @@
+---
+---
+"use strict";
+
+const puppeteer = require("puppeteer")
+const fs = require("fs")
+const os = require("os")
+
+var links = {{ site.data.links_en | jsonify }};
+
+(async() => {
+	const browser = await puppeteer.launch()
+	const page = await browser.newPage()
+
+	var root = "file:///" + __dirname + "/../en/"
+	console.log("Root is: " + root)
+
+	for (var i = 0; i < links.length; i++) {
+		var link = links[i]
+		if (link.link) {
+			console.log("Rendering " + link.title)
+			await page.goto(root + link.link, {waitUntil: "networkidle"})
+
+			// page.pdf() is currently supported only in headless mode.
+			// @see https://bugs.chromium.org/p/chromium/issues/detail?id=753118
+			const margin = "0.2in"
+			await page.pdf({
+				path: "tmp/page_" + (link.num || ("0_" + link.title.replace(".", "_"))) + ".pdf",
+				format: "A5",
+				margin: {
+					top: margin,
+					right: margin,
+					bottom: margin,
+					left: margin,
+				}
+			})
+		}
+	}
+	browser.close()
+
+})()

utils/convert_to_pdf.sh

@@ -1,25 +1,6 @@
----
----
 #!/bin/sh
 
-oldCWD="$PWD"
-cd $(dirname $0)
-cd ../en/
-
-#wkhtmltopdf --print-media-type {% for link in site.data.links_en %}{% if link.link %}{{ link.link }} {% endif %}{% endfor %} out.pdf
-#mv out.pdf $oldCWD/book.pdf
-
-{% for link in site.data.links_en %}
-{% if link.link %}
-/opt/google/chrome/google-chrome --headless  --disable-gpu --print-to-pdf file:///${PWD}/{{ link.link }}
-
-{% if link.num %}
-mv output.pdf page_{{ link.num }}.pdf
-{% else %}
-mv output.pdf page_0_{{ link.link | replace:".","_" }}.pdf
-{% endif %}
-
-{% endif %}
-{% endfor %}
-
-pdfunite page*.pdf ${oldCWD}/book.pdf
+jekyll build
+mkdir -p tmp
+n use latest _site/utils/convert_to_pdf.js
+pdfunite tmp/page*.pdf tmp/book.pdf