Accessibility Sans Serif Option (#90)

* Accessibility Sans Serif Option

This adds another build processs where the book is built using a sans
serif font. This can facilitate reading the book for some users.

* Update readme

.gitignore

@@ -48,3 +48,6 @@ book/book*.html
 book/book-epub/
 book/book-mobi/
 book/book-azw3/
+*.bak
+book_sans_serif/
+*.opf

README.md

@@ -3,6 +3,8 @@
 The sourdough framework is an open-source book dedicated to
 helping you to make the best possible sourdough bread at home.
 
+![The book cover](book/images/cover-page.jpg)
+
 Rather than providing recipes this book intends to provide a
 framework that enables you to bake bread in your respective
 environment. Every flour, every sourdough, and every home setup
@@ -10,8 +12,6 @@ is different. This makes following recipes without background
 information so hard and a fail-prone endeavor. This book
 intends to close that gap.
 
-![A whole wheat sourdough bread](./book/images/whole-wheat-crumb.jpg)
-
 ## Background
 
 4 years after launching the repositories [the-bread-code](https://github.com/hendricius/the-bread-code)
@@ -21,7 +21,8 @@ project intends to go one step deeper into the workings of
 natural fermentation. At the same time as many scientific references
 as possible are provided.
 
-![The book cover](book/images/cover-page.jpg)
+![A whole wheat sourdough bread](./book/images/whole-wheat-crumb.jpg)
+
 
 ## Building the book (Docker)
 
@@ -67,6 +68,13 @@ The below versions are automatically built on every push to the `main` branch.
 * [Download compiled .mobi version](https://www.the-bread-code.io/book.mobi)
 * [Download compiled .azw3 version](https://www.the-bread-code.io/book.azw3)
 
+There's an additional enhanced accessibility version using a sans serif font:
+
+* [Download compiled .pdf version](https://www.the-bread-code.io/book-sans-serif.pdf)
+* [Download compiled .epub version](https://www.the-bread-code.io/book-sans-serif.epub)
+* [Download compiled .mobi version](https://www.the-bread-code.io/book-sans-serif.mobi)
+* [Download compiled .azw3 version](https://www.the-bread-code.io/book-sans-serif.azw3)
+
 ## Support
 
 Did you find a typo, or feel the wording could be improved?
@@ -78,9 +86,9 @@ that it will reach more people all over the world without
 budget constraints.
 
 If you would like to contribute with a small donation you can do so
-via my [ko-fi page.](https://breadco.de/book) This will help me
-to cover costs related to running the-bread-code and allow me
-to work more updates for this book.
+via my [ko-fi page.](https://breadco.de/book) Your donation will tremendously
+help me to cover costs related to running the-bread-code. It futhermore allows
+me to dedidcate time to continously update and improve this book.
 
 ## Links
 

book/book.tex

@@ -14,6 +14,10 @@
 \usepackage{tex4ebook}
 \usepackage{chemformula}
 
+% Fonts for accessibility
+%\usepackage{helvet}
+%\renewcommand{\familydefault}{\sfdefault}
+
 % References
 \usepackage[backend=biber]{biblatex}
 \addbibresource{references.bib}

book/makefile

@@ -4,6 +4,11 @@ build_pdf: clean figures tables
 	biber book
 	pdflatex book.tex
 
+# setup_default_build:
+# 	sed -i '.bak' 's#^\\usepackage{helvet}#%\\usepackage{helvet}#g' book.tex
+# 	sed -i '.bak' 's#^\\renewcommand{\\familydefault}{\\sfdefault}#%\\renewcommand{\\familydefault}{\\sfdefault}#g' book.tex
+
+
 .PHONY: clean_figures
 clean_figures:
 	cd figures
@@ -64,20 +69,48 @@ clean: clean_figures
 	rm -f content.opf
 	find . -name "*.xbb" | xargs rm -f
 	rm -rf release/
+	rm -rf release_sans_serif/
 
-.PHONY: release
-release: clean build_pdf make_release_dir build_ebook
+.PHONY: release_default
+release_default: clean build_pdf make_release_dir build_ebook
 	cp book.pdf release/TheBreadCode-The-Sourdough-Framework.pdf
 	cp book-mobi/book.mobi release/TheBreadCode-The-Sourdough-Framework.mobi
 	cp book-epub/book.epub release/TheBreadCode-The-Sourdough-Framework.epub
 	cp book-azw3/book.azw3 release/TheBreadCode-The-Sourdough-Framework.azw3
 
+.PHONY: release_default
+release: release_default release_sans_serif
+
 .PHONY: make_release_dir
 make_release_dir:
 	mkdir -p release
 
+.PHONY: release_sans_serif
+release_sans_serif: make_release_dir
+	# For the sans serif version we are just going
+	# to copy all the files into a new folder and
+	rm -rf release_sans_serif/
+	mkdir /tmp/release_sans_serif
+	cp -R * /tmp/release_sans_serif
+	mv /tmp/release_sans_serif .
+	# The next part will uncomment the sans serif font in the book.tex
+	#
+	# Note that the OS X sed behaves a little different
+	# than the gnu sed. If you are on OS X you might
+	# have to install gnu sed for this to work. Or you can
+	# use sed -i '.bak' restofcommand. OS X wants to have
+	# a backup file listed before replacing the contents
+	# of a file.
+	sed -i 's#%\\usepackage{helvet}#\\usepackage{helvet}#g' release_sans_serif/book.tex
+	sed -i 's#%\\renewcommand{\\familydefault}{\\sfdefault}#\\renewcommand{\\familydefault}{\\sfdefault}#g' release_sans_serif/book.tex
+	cd release_sans_serif && $(MAKE) release_default
+	cp release_sans_serif/release/TheBreadCode-The-Sourdough-Framework.pdf  release/TheBreadCode-The-Sourdough-Framework-sans-serif.pdf
+	cp release_sans_serif/release/TheBreadCode-The-Sourdough-Framework.mobi release/TheBreadCode-The-Sourdough-Framework-sans-serif.mobi
+	cp release_sans_serif/release/TheBreadCode-The-Sourdough-Framework.epub release/TheBreadCode-The-Sourdough-Framework-sans-serif.epub
+	cp release_sans_serif/release/TheBreadCode-The-Sourdough-Framework.azw3 release/TheBreadCode-The-Sourdough-Framework-sans-serif.azw3
+
 .PHONY: build_ebook
-build_ebook: build_pdf make_release_dir
+build_ebook: make_release_dir
 	find . -name "*.jpg" | xargs ebb -x
 	find . -name "*.png" | xargs ebb -x
 	tex4ebook -c tex4ebook.cfg -f epub book.tex